{"id":10310,"date":"2026-09-18T01:40:20","date_gmt":"2026-09-18T01:40:20","guid":{"rendered":"https:\/\/ifanultra.com\/ppr-pipe-vs-galvanized-steel.html"},"modified":"2026-10-02T04:41:26","modified_gmt":"2026-10-02T04:41:26","slug":"ppr-pipe-vs-galvanized-steel","status":"publish","type":"post","link":"https:\/\/ifanultra.com\/es\/ppr-pipe-vs-galvanized-steel.html","title":{"rendered":"PPR Pipe vs Galvanised Steel: When to Switch and What the Cost Case Looks Like"},"content":{"rendered":"<p style=\"line-height: 1.8; margin-bottom: 28px;\">Consider a hot-water retrofit where inspection reveals a galvanised bore narrowed by corrosion product. The buying questions are the replacement duty, the required internal diameter and the installed quotation. This is an illustrative scenario, not an IFANULTRA field case.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">PP-R can suit a corrosion-driven retrofit when its documented duty and installation requirements fit. Steel may remain preferable where impact, exposure or structural constraints govern. Compare the specific products and installation, rather than selecting from the material name alone.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">The trap sits in the middle of the switch, and it is a sizing trap rather than a material one. Galvanised tube uses nominal-bore labels and PP-R uses outside diameter; in the DN20\u2013DN50 examples below, replacing EN 10255 medium-series steel with the same-label PN20 PP-R retains about 59\u201364% of the nominal internal diameter.<\/p>\n<nav style=\"background-color: #f9f9f9; border: 1px solid #e0e0e0; border-radius: 4px; padding: 20px 24px; margin-bottom: 28px;\">\n<p style=\"margin: 0 0 10px 0; font-weight: 700;\">In this comparison<\/p>\n<ul style=\"margin: 0; padding-left: 20px; list-style-type: none;\">\n<li style=\"margin-bottom: 6px;\"><a href=\"#head-to-head\" style=\"text-decoration: none;\">PPR vs Galvanised Steel: The Head-to-Head<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#corrosion-clock\" style=\"text-decoration: none;\">The Corrosion Clock: What Actually Ends a Galvanised Line<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#sizing-trap\" style=\"text-decoration: none;\">The Sizing Trap That Wrecks the Retrofit<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#cost-case\" style=\"text-decoration: none;\">What the Cost Case Actually Looks Like<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#where-galvanised-wins\" style=\"text-decoration: none;\">Where Galvanised Still Wins, and How to Tie the Two Together<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#what-we-check\" style=\"text-decoration: none;\">What We Check Before a Bore-Matched Quote Goes Out<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#which-to-specify\" style=\"text-decoration: none;\">Which One Should You Specify?<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#conclusion\" style=\"text-decoration: none;\">Conclusion<\/a><\/li>\n<li style=\"margin-bottom: 6px;\"><a href=\"#frequently-asked-questions\" style=\"text-decoration: none;\">Frequently Asked Questions<\/a><\/li>\n<\/ul>\n<\/nav>\n<figure class=\"media-video-figure\"><div aria-label=\"Play video\" onclick='var f=document.createElement(\"iframe\");f.src=\"https:\/\/www.youtube.com\/embed\/4NqLS5Ho_ww?autoplay=1\";f.allow=\"accelerometer;autoplay;clipboard-write;encrypted-media;gyroscope;picture-in-picture;web-share\";f.allowFullscreen=true;f.setAttribute(\"style\",\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\");this.textContent=\"\";this.appendChild(f);this.onclick=null;' role=\"button\" style=\"position:relative;width:100%;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:8px;background:#000;cursor:pointer\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" data-src=\"https:\/\/i.ytimg.com\/vi\/4NqLS5Ho_ww\/hqdefault.jpg\" alt=\"Polypropylene (PP-R and PP-RCT) Socket Fusion\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover\" \/><noscript><img loading=\"lazy\" decoding=\"async\" alt=\"Polypropylene (PP-R and PP-RCT) Socket Fusion\" height=\"360\" loading=\"lazy\" src=\"https:\/\/i.ytimg.com\/vi\/4NqLS5Ho_ww\/hqdefault.jpg\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover\" width=\"480\"><\/noscript><span style=\"position:absolute;top:45%;left:45%;background:#f00;color:#fff;padding:12px 20px;border-radius:12px\">\u25b6<\/span><\/div><figcaption>Official PPI socket-fusion demonstration; follow the selected system\u2019s approved procedure. <a href=\"https:\/\/www.youtube.com\/watch?v=4NqLS5Ho_ww\">Watch on YouTube<\/a>.<\/figcaption><\/figure><h2 id=\"head-to-head\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">PPR vs Galvanised Steel: The Head-to-Head<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Most comparisons of these materials list adjectives. The rows that decide a specification are narrower: which document governs the pipe, how size is measured, how a joint is made, and what ends the line.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Two carry numbers worth memorising. A DN25 galvanised tube to EN 10255 medium series has a 27.3 mm bore; a DN25 PP-R pipe at PN20 has 16.6 mm. The published representative PP-R socket chart lists 260 \u00b0C and 7 s heating at DN25 under standard conditions; follow the approved system procedure. Steel is cut and threaded. The materials do not share a sizing basis, and that row causes the most expensive retrofit mistakes.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 28px; border: 1px solid #e0e0e0; font-family: inherit;\">\n<caption style=\"text-align: left; font-size: 14px; line-height: 1.6; padding-bottom: 10px;\">Head-to-head on the measures that decide a water-service specification. Source: EN 10255:2004+A1:2007 medium series; ISO 15874-2:2013 with Amd 1:2018 and Amd 2:2022; ASTM F2389 ratings via the Plastics Pipe Institute; Chukhin et al., 2025; IFAN ULTRA published fusion chart.<\/caption>\n<thead><tr>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Measure<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Galvanised steel<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">PP-R<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Verdict<\/th>\n<\/tr><\/thead>\n<tbody>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Governing standard<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">EN 10255:2004+A1:2007<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">ISO 15874-2:2013 + Amd 1:2018 + Amd 2:2022<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Tie. Cite edition and year on both<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Sizing basis<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Nominal bore; DN25 gives 27.3 mm bore<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Outside diameter; DN25 PN20 gives 16.6 mm bore<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Galvanised. Never swap by label<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Joint method<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Cut and threaded, sealed by compound<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Socket fusion at 260 \u00b0C; 7 s on the die at DN25<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">PP-R. Fused joint is homogeneous<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Failure mode<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Localised pitting through the wall; bore closes with tubercles<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Cold joints and poor fusion discipline<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Check fusion quality, duty and material evidence<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Temperature ceiling<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Verify the steel pipe, coating, joints and water chemistry against the specified temperature and pressure.<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Check the offered product\u2019s application class and pressure\u2013temperature rating<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Select the system whose documented rating and corrosion compatibility meet the duty.<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Corrosion in hot water<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Reviewed 65 \u00b0C study: about 0.05 mm\/year; separate field report: zinc loss about one-third<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Resists the steel rust mechanism; check chemical compatibility<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">PP-R where the documented duty fits<\/td><\/tr>\n<\/tbody>\n<\/table><div style=\"background-color: #f9f9f9; border-left: 4px solid #19619a; padding: 20px 24px; margin-bottom: 28px; border-radius: 4px;\">\n<p style=\"margin: 0 0 12px 0; font-weight: 700; font-size: 18px;\">Key Takeaways<\/p>\n<ul style=\"margin: 0; padding-left: 20px; list-style-type: disc;\">\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">Replacing EN 10255 medium-series steel with same-label PN20 PP-R across DN20\u2013DN50 retains 59\u201364% of the nominal internal diameter. An equal-head-loss, equal-roughness model gives 25\u201330 % of the flow; that is not actual system performance. Bore parity needs about two sizes up at PN20, one at PN10.<\/li>\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">A study reviewed by Chukhin et al. (2025) reported about 0.05 mm\/year at 65 \u00b0C. Zinc-coating loss of about one-third in 12 months comes from a separate cited field report.<\/li>\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">Average corrosion rate misleads: uniform-rate arithmetic on a 3.2 mm DN25 wall predicts about 64 years, whereas the paper describes fistulas in inspected hot-water pipes after 3\u20135 years. The attack is localised.<\/li>\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">Cite standards in full: EN 10255:2004+A1:2007 for galvanised tube; ISO 15874-2:2013 with Amd 1:2018 and Amd 2:2022 for PP-R.<\/li>\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">PP-R&#8217;s 50-year design basis uses long-term strength extrapolation; it is not evidence of a 50-year field test or an unconditional service guarantee.<\/li>\n<li style=\"margin-bottom: 8px; line-height: 1.6;\">No article can quote your installed cost. Drivers are public: zinc USD 3,539\/t (June 2026), PP-R resin USD 780\u20131,150\/t. Labour and delivered prices are local.<\/li>\n<\/ul>\n<\/div>\n<figure style=\"margin: 0 0 28px 0;\">\n<img data-srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-scaled.jpg 2560w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-300x169.jpg 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-1024x576.jpg 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-768x432.jpg 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-1536x864.jpg 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-2048x1152.jpg 2048w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-18x10.jpg 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-600x338.jpg 600w\" loading=\"lazy\" data-src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-scaled.jpg\" alt=\"Green PP-R pipe leaving the cooling bath on an extrusion line, water droplets standing on the outside wall\" class=\"wp-image-4883 lazyload\" decoding=\"async\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"width:100%; height:auto; border-radius:8px;\"   sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><noscript><img loading=\"lazy\" alt=\"Green PP-R pipe leaving the cooling bath on an extrusion line, water droplets standing on the outside wall\" class=\"wp-image-4883\" decoding=\"async\" height=\"1440\" loading=\"lazy\" src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-scaled.jpg\" style=\"width:100%; height:auto; border-radius:8px;\" width=\"2560\" srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-scaled.jpg 2560w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-300x169.jpg 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-1024x576.jpg 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-768x432.jpg 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-1536x864.jpg 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-2048x1152.jpg 2048w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-18x10.jpg 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2025\/04\/A7C09112-600x338.jpg 600w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/noscript>\n<figcaption style=\"font-size: 14px; color: #555; margin-top: 8px;\">PP-R is gauged on outside diameter, EN 10255 galvanised tube on nominal bore \u2014 the difference warrants a hydraulic check before a like-for-like DN order. The bore comparison alone is not a field-flow measurement.<\/figcaption>\n<\/figure>\n<h2 id=\"corrosion-clock\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">The Corrosion Clock: What Actually Ends a Galvanised Line<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Almost every page comparing these materials asserts that galvanised pipe rusts. Very few put a measured rate against it. A 2025 paper on hot water supply systems by <a href=\"https:\/\/mdpi-res.com\/d_attachment\/cmd\/cmd-06-00055\/article_deploy\/cmd-06-00055.pdf\" rel=\"noopener\" target=\"_blank\">Chukhin, Makisha and Gulshin<\/a> reviews an earlier experiment at 65 \u00b0C over 150 days: 1.1 g\/m\u00b2 per day, roughly 0.05 mm\/year, rising to about 0.064 mm\/year with copper ions. Separately, its introduction cites a Moscow hot-water field report: zinc-coating reductions of 17%, 9% and 6% in the first three months, then 1% over the next nine months. Summing those reported percentages gives 33%, a derived total, not a number printed directly in the paper. The paper\u2019s 50 \u00b1 2 \u00b0C bench images concern a different observation.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Those numbers describe hot water service with that network&#8217;s water chemistry, and they should not be read across to a cold-water line, whose chemistry and conditions may differ.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Now do the obvious arithmetic. A DN25 medium-series wall is 3.2 mm; at 0.05 mm per year, uniform corrosion takes about 64 years to eat through it. The 2025 paper describes inspected hot-water pipes removed after three to five years following fistulas. This is field evidence, not a matched lifetime experiment.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">These separate observations illustrate why an average uniform-loss calculation cannot predict a particular riser\u2019s life; the paper\u2019s inspection and microscopy evidence identifies localised pitting. A replacement plan built on a smooth depreciation curve is planning for the wrong failure.<\/p>\n<figure style=\"margin: 0 0 28px 0;\">\n<img data-srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-600x400.webp 600w\" loading=\"lazy\" data-src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore.webp\" alt=\"Galvanised steel water pipe cut open lengthwise, showing thick orange-brown corrosion tubercles and scale that have closed most of the internal bore\" class=\"wp-image-10306 lazyload\" decoding=\"async\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"width:100%; height:auto; border-radius:8px;\"   sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><noscript><img loading=\"lazy\" alt=\"Galvanised steel water pipe cut open lengthwise, showing thick orange-brown corrosion tubercles and scale that have closed most of the internal bore\" class=\"wp-image-10306\" decoding=\"async\" height=\"1024\" loading=\"lazy\" src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore.webp\" style=\"width:100%; height:auto; border-radius:8px;\" width=\"1536\" srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-corrosion-bore-600x400.webp 600w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/noscript>\n<figcaption style=\"font-size: 14px; color: #555; margin-top: 8px;\">Generated illustration of corrosion deposits. Uniform-wall arithmetic gives 64 years using the reviewed 65 \u00b0C rate; separate inspected pipes had fistulas after three to five years. Neither is a general service-life prediction.<\/figcaption>\n<\/figure>\n<h2 id=\"sizing-trap\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">The Sizing Trap That Wrecks the Retrofit<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Galvanised tube is sized on nominal bore. PP-R is sized on outside diameter, so its DN number is the outside of the pipe and the wall is subtracted from it. A contractor who orders &#8220;the same size in PP-R&#8221; gets something much smaller.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">At DN25 the galvanised bore is 27.3 mm; PP-R PN20 at DN25 has a bore of 16.6 mm. Across DN20 to DN50 the label-for-label swap keeps 59\u201364 % of the bore. An equal-head-loss, equal-length, equal-Hazen\u2013Williams-C model scales flow with diameter to the power 2.63 and gives 25\u201330 % retention. Different roughness, fittings and system conditions change the result; this isolates geometry, not measured service flow.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">The correction depends on pressure class, which is why a single substitution rule is unsafe. At PN20 bore parity sits about two nominal sizes up: DN25 galvanised is matched to 97 % by PP-R DN40. At PN10 the wall is thinner and one step is close to enough, with DN32 reaching 96 % of the same bore.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Size from a flow calculation rather than a conversion table, pick the <a href=\"https:\/\/ifanultra.com\/ppr-pipe-pressure-class-pn10-pn16-pn20-pn25.html\">pressure class<\/a> the duty needs, and check the wall schedule of the range you are buying. IFANULTRA\u2019s <a href=\"https:\/\/ifanultra.com\/ppr-pipe-for-hot-water.html\">hot-water guide<\/a> publishes a PN20 wall schedule from DN20 to DN160; confirm the offered SKU dimensions in the quotation.<\/p>\n<figure style=\"margin: 0 0 28px 0;\"><svg aria-label=\"Line chart plotting internal bore in millimetres against nominal DN label from DN20 to DN50. Galvanised steel to EN 10255 medium series runs highest, from 21.7 mm at DN20 to 53.1 mm at DN50. The illustrative PP-R PN10 bores run from 16.0 mm at 20 mm OD, using the 2.0 mm minimum wall for fusion, to 40.8 mm at 50 mm OD. PP-R PN20 runs lowest, from 13.2 mm to 33.2 mm, so the same DN number buys a much smaller bore in PP-R than in galvanised steel, and the gap widens with size.\" role=\"img\" viewbox=\"0 0 700 380\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><title>Internal bore at the same DN label: galvanised steel versus PP-R<\/title><rect fill=\"#ffffff\" height=\"380\" width=\"700\" x=\"0\" y=\"0\"><\/rect><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"332.0\" y2=\"332.0\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"336.0\">0<\/text><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"270.8\" y2=\"270.8\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"274.8\">20<\/text><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"209.6\" y2=\"209.6\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"213.6\">40<\/text><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"148.4\" y2=\"148.4\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"152.4\">60<\/text><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"87.2\" y2=\"87.2\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"91.2\">80<\/text><line stroke=\"#e0e0e0\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"26.0\" y2=\"26.0\"><\/line><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"end\" x=\"60\" y=\"30.0\">100<\/text><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"middle\" x=\"68.0\" y=\"350\">20<\/text><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"middle\" x=\"170.0\" y=\"350\">25<\/text><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"middle\" x=\"312.8\" y=\"350\">32<\/text><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"middle\" x=\"476.0\" y=\"350\">40<\/text><text fill=\"#666\" font-family=\"sans-serif\" font-size=\"11\" text-anchor=\"middle\" x=\"680.0\" y=\"350\">50<\/text><line stroke=\"#333\" stroke-width=\"1\" x1=\"68\" x2=\"68\" y1=\"26\" y2=\"332\"><\/line><line stroke=\"#333\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"332\" y2=\"332\"><\/line><text fill=\"#333\" font-family=\"sans-serif\" font-size=\"12\" text-anchor=\"middle\" transform=\"rotate(-90 20 179.0)\" x=\"20\" y=\"179.0\">Internal bore (mm)<\/text><text fill=\"#333\" font-family=\"sans-serif\" font-size=\"12\" text-anchor=\"middle\" x=\"374.0\" y=\"372\">Nominal size label (DN)<\/text><polyline fill=\"none\" points=\"68.0,265.6 170.0,248.5 312.8,221.8 476.0,203.8 680.0,169.5\" stroke=\"#19619a\" stroke-width=\"2.5\"><\/polyline><text fill=\"#19619a\" font-family=\"sans-serif\" font-size=\"12\" font-weight=\"bold\" text-anchor=\"end\" x=\"676.0\" y=\"161.5\">Galvanised steel bore, EN 10255 medium (mm)<\/text><polyline fill=\"none\" points=\"68.0,283.0 170.0,269.6 312.8,251.8 476.0,232.2 680.0,207.2\" stroke=\"#103f64\" stroke-width=\"2.5\"><\/polyline><text fill=\"#103f64\" font-family=\"sans-serif\" font-size=\"12\" font-weight=\"bold\" text-anchor=\"end\" x=\"676.0\" y=\"199.2\">PP-R PN10 bore, SDR 11 (mm)<\/text><polyline fill=\"none\" points=\"68.0,291.6 170.0,281.2 312.8,267.1 476.0,250.6 680.0,230.4\" stroke=\"#80a8c7\" stroke-width=\"2.5\"><\/polyline><text fill=\"#80a8c7\" font-family=\"sans-serif\" font-size=\"12\" font-weight=\"bold\" text-anchor=\"end\" x=\"676.0\" y=\"222.4\">PP-R PN20 bore, SDR 6 (mm)<\/text><line stroke=\"#333\" stroke-width=\"1\" x1=\"68\" x2=\"680\" y1=\"332.0\" y2=\"332.0\"><\/line><\/svg><figcaption style=\"font-size: 14px; color: #666; line-height: 1.6; margin-top: 8px;\">At every nominal size, the same DN number buys a smaller bore in PP-R than in galvanised steel, and the PP-R pressure class decides how much smaller. Method: Nominal bore equals outside diameter minus twice the stated wall: steel uses the EN 10255 medium-series schedule, PN20 uses the cited IFANULTRA schedule, and the illustrative PN10 values use the applicable dimension table with the 2.0 mm minimum wall for fusion; confirm the offered product\u2019s dimensions and tolerances before ordering.<\/figcaption><\/figure>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 28px; border: 1px solid #e0e0e0; font-family: inherit;\"><caption style=\"text-align: left; font-size: 14px; line-height: 1.6; padding-bottom: 10px;\">Internal bore at the same DN label: galvanised steel versus PP-R. Source and method: Nominal bore equals outside diameter minus twice the stated wall: steel uses the EN 10255 medium-series schedule, PN20 uses the cited IFANULTRA schedule, and the illustrative PN10 values use the applicable dimension table with the 2.0 mm minimum wall for fusion; confirm the offered product\u2019s dimensions and tolerances before ordering.<\/caption><thead><tr><th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Nominal size label (DN)<\/th><th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Galvanised steel bore, EN 10255 medium (mm)<\/th><th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">PP-R PN10 bore, SDR 11 (mm)<\/th><th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">PP-R PN20 bore, SDR 6 (mm)<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\" style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">20<\/th><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">21.7<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">16.0<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">13.2<\/td><\/tr><tr><th scope=\"row\" style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">25<\/th><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">27.3<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">20.4<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">16.6<\/td><\/tr><tr><th scope=\"row\" style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">32<\/th><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">36.0<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">26.2<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">21.2<\/td><\/tr><tr><th scope=\"row\" style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">40<\/th><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">41.9<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">32.6<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">26.6<\/td><\/tr><tr><th scope=\"row\" style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">50<\/th><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">53.1<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">40.8<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">33.2<\/td><\/tr><\/tbody><\/table>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Read the chart as a warning about purchase orders, not hydraulics. The steel bore remains larger at every plotted label, and the gap generally widens across the range.<\/p>\n<h2 id=\"cost-case\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">What the Cost Case Actually Looks Like<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Public benchmarks and manufacturer estimates describe inputs; neither establishes an installed total. Zinc, which sets the galvanising cost of steel tube, averaged USD 3,539 per tonne in June 2026 on the <a href=\"https:\/\/thedocs.worldbank.org\/en\/doc\/74e8be41ceb20fa0da750cda2f6b9e4e-0050012026\/related\/CMO-Pink-Sheet-July-2026.pdf\" rel=\"noopener\" target=\"_blank\">World Bank Pink Sheet<\/a>, with iron ore at USD 100.8 per dry tonne. IFANULTRA\u2019s published cost discussion estimates PP-R resin at USD 780\u20131,150 per tonne and 70\u201385% of manufacturing cost; confirm the current grade-specific input and finished-product quotation. See the <a href=\"https:\/\/ifanultra.com\/what-is-ppr-pipe.html\" rel=\"noopener\" target=\"_blank\">published cost discussion<\/a>.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Both are input costs, not delivered pipe prices. A per-metre installed total built on them has estimated the three largest terms.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Two order inputs need separate pricing. Bore matching can require DN40 PP-R against DN25 galvanised; compare the selected sizes rather than assuming a material saving.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">A 40-foot high-cube container has about 76 m\u00b3 of internal volume, but the limiting factor must be calculated from the packed SKU mix, gross weight and route-specific payload limits. See the <a href=\"https:\/\/www.hapag-lloyd.com\/en\/services-information\/cargo-fleet\/container\/40-standard-high-cube.html\" rel=\"noopener\" target=\"_blank\">carrier\u2019s equipment example<\/a>. Request packed volume and gross weight for each quotation before comparing freight.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 28px; border: 1px solid #e0e0e0; font-family: inherit;\">\n<caption style=\"text-align: left; font-size: 14px; line-height: 1.6; padding-bottom: 10px;\">Cost structure by element, with the party who can actually price each one. Sources: World Bank Commodities Price Data, 2 July 2026 (commodity benchmark); <a href=\"https:\/\/ifanultra.com\/what-is-ppr-pipe.html\" rel=\"noopener\" target=\"_blank\">IFANULTRA cost estimate<\/a>; <a href=\"https:\/\/ifanultra.com\/ppr-pipe-for-hot-water.html\" rel=\"noopener\" target=\"_blank\">published order terms<\/a>; <a href=\"https:\/\/www.hapag-lloyd.com\/en\/services-information\/cargo-fleet\/container\/40-standard-high-cube.html\" rel=\"noopener\" target=\"_blank\">carrier equipment example<\/a>. Bore row: EN 10255 medium series and the stated PP-R schedules; confirm offered dimensions.<\/caption>\n<thead><tr>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Cost element<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Galvanised steel<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">PP-R<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Who can price it<\/th>\n<\/tr><\/thead>\n<tbody>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Raw material driver<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Steel plus zinc coating; zinc USD 3,539\/t (June 2026)<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Manufacturer estimate: resin USD 780\u20131,150\/t, 70\u201385% of works cost<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">World Bank benchmark; IFANULTRA estimate\u2014confirm current inputs<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Size bought for equal bore<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">DN25 carries 27.3 mm<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">DN40 at PN20, or DN32 at PN10<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Your flow calculation<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Jointing on site<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Cut, thread, seal; rework means recutting<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Fusion at 260 \u00b0C, 7 s at DN25, 24 s at DN63<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Local contractor rate<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Container economics<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Calculate packed volume and gross weight for this order<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Check packed volume against equipment and route-specific payload limits<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Freight quote<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">First order terms<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Varies by mill and stockist<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">MOQ 1 FCL; 15\u201325 days production; 30\/70 payment<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Supplier, in writing<\/td><\/tr>\n<\/tbody>\n<\/table>\n<h3>Make the quotations comparable<\/h3><p style=\"line-height: 1.8; margin-bottom: 28px;\">Send both suppliers the required flow, available pressure, run length, fittings schedule, water duty and existing measured dimensions. Ask each to return its selected size and rating, delivered pipe-and-fitting quantities, jointing scope, freight basis and dispatch date. Compare complete installed scope, not raw-material prices. Confirm the published 1 FCL MOQ and 15\u201325-day production basis against this order; transit, approval dependencies and site labour need separate dates and prices.<\/p><h2 id=\"where-galvanised-wins\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">Where Galvanised Still Wins, and How to Tie the Two Together<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">PP-R has real limits, and a supplier who will not name them is worth less than one who will. The <a href=\"https:\/\/conduitcalc.plasticpipe.org\/building-construction\/bcd-pp.html\" rel=\"noopener\" target=\"_blank\">Plastics Pipe Institute\u2019s North American overview<\/a> describes PP-R ratings at 82 \u00b0C with pressure dependent on dimension ratio. That is not a universal ISO 15874 temperature ceiling. For galvanised steel, <a href=\"https:\/\/galvanizeit.org\/knowledgebase\/article\/the-performance-of-hot-dip-galvanized-steel-in-water-environments\" rel=\"noopener\" target=\"_blank\">AGA guidance<\/a> describes water-chemistry-dependent corrosion; verify the pipe, coating and joints against the duty. Select from the offered system\u2019s application class, design pressure and temperature schedule, including the documented operating excursions.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Steel may suit impact-exposed runs, but support spacing must follow the applicable code and approved design. Both systems require supports appropriate to their material, loads and installation rules. Unprotected PP-R degrades under sustained UV, so outdoor runs need a UV-stabilised grade or covering. And the bore penalty is real, size for size.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">One more limit costs importers the most. An ISO 15874 type-test report is not a drinking-water approval: the Introduction to ISO 15874-1 states that no information is provided on whether the product can be used without restriction, and that national regulations remain in force. Nor is the 50-year figure a 50-year test, as our own <a href=\"https:\/\/ifanultra.com\/ppr-pipe-standards-iso-15874-din-8077-explained.html\">breakdown of ISO 15874 and DIN 8077<\/a> sets out.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Where only part of a system is converted, the two materials meet at a threaded transition: a brass-insert fitting fused to the PP-R and threaded to the existing steel. <a href=\"https:\/\/ifanultra.com\/ppr-fittings-brass-insert-thread-transitions.html\">Brass insert transitions<\/a> are where mixed-material retrofits leak, so specify the insert rather than improvising.<\/p>\n<figure style=\"margin: 0 0 28px 0;\">\n<img data-srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-600x400.webp 600w\" loading=\"lazy\" data-src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint.webp\" alt=\"Green PP-R fitting with a brass female threaded insert screwed onto the freshly cut and threaded end of a grey galvanised steel water pipe on a steel workbench\" class=\"wp-image-10307 lazyload\" decoding=\"async\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"width:100%; height:auto; border-radius:8px;\"   sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><noscript><img loading=\"lazy\" alt=\"Green PP-R fitting with a brass female threaded insert screwed onto the freshly cut and threaded end of a grey galvanised steel water pipe on a steel workbench\" class=\"wp-image-10307\" decoding=\"async\" height=\"1024\" loading=\"lazy\" src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint.webp\" style=\"width:100%; height:auto; border-radius:8px;\" width=\"1536\" srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-transition-joint-600x400.webp 600w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/noscript>\n<figcaption style=\"font-size: 14px; color: #555; margin-top: 8px;\">The brass-insert thread makes a partial conversion survivable: fused to PP-R on one side, threaded into the surviving steel on the other.<\/figcaption>\n<\/figure>\n<h2 id=\"what-we-check\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">What We Check Before a Bore-Matched Quote Goes Out<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Our <a href=\"https:\/\/ifanultra.com\/ppr-pipe-for-hot-water.html\" rel=\"noopener\" target=\"_blank\">published QC process<\/a> describes the checks supporting a bore-matched quotation; request the records for the offered batch. Resin grade is verified by source and grade. Wall thickness is checked with a caliper across multiple pallets rather than the top layer, because the top layer is the one that gets sampled.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Outside diameter and wall are measured against ISO 15874 and DIN 8077, pressure and thermal tests are run to the rated class, and printed markings are reconciled to the certificate numbers they claim. For DN40 PN20, 6.7 mm is the published nominal wall; acceptance must use the applicable tolerance and batch inspection criteria, rather than exact equality to one caliper reading.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">Where that stops matters too. IFANULTRA\u2019s <a href=\"https:\/\/ifanultra.com\/certification\" rel=\"noopener\" target=\"_blank\">public certification page<\/a> lists ISO 9001, SAI Global, SKZ, HY and NSF; verify each current document and its product scope. <a href=\"https:\/\/www.dinmedia.de\/en\/standard\/din-en-iso-9001\/235671251\" rel=\"noopener\" target=\"_blank\">ISO 9001 concerns quality management<\/a>; a list of certificate names does not establish a particular product\u2019s dimensions, pressure rating or local drinking-water acceptance. Request the current certificate or listing, covered SKU and scope, alongside the relevant product test evidence.<\/p>\n<figure style=\"margin: 0 0 28px 0;\">\n<img data-srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-600x400.webp 600w\" loading=\"lazy\" data-src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper.webp\" alt=\"Gloved hand using a digital caliper to measure the wall thickness of a cut green PP-R pipe ring on a metrology bench, with more cut rings stacked behind\" class=\"wp-image-10308 lazyload\" decoding=\"async\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"width:100%; height:auto; border-radius:8px;\"   sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><noscript><img loading=\"lazy\" alt=\"Gloved hand using a digital caliper to measure the wall thickness of a cut green PP-R pipe ring on a metrology bench, with more cut rings stacked behind\" class=\"wp-image-10308\" decoding=\"async\" height=\"1024\" loading=\"lazy\" src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper.webp\" style=\"width:100%; height:auto; border-radius:8px;\" width=\"1536\" srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-qc-caliper-600x400.webp 600w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/noscript>\n<figcaption style=\"font-size: 14px; color: #555; margin-top: 8px;\">Wall thickness is measured across pallets, not on the top layer: the published DN40 PN20 nominal wall is 6.7 mm, with acceptance tied to applicable tolerances. This generated illustration is not a batch inspection record.<\/figcaption>\n<\/figure>\n<h2 id=\"which-to-specify\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">Which One Should You Specify?<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">The decision is keyed to duty, not to preference, and it splits cleanly enough to put in a table. A corrosion-driven replacement can favour PP-R where its documented rating and installation fit. Exposed, impact-loaded or hotter runs need a system selected for the actual loads, support arrangement and operating duty.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">A buyer moving a first container needs five facts: the size range (DN20 to DN160), the pressure classes, the MOQ, the lead time, and what certification the supplier holds. Ours are ISO 9001, SAI Global, SKZ, HY and NSF. If copper is the other candidate rather than steel, that comparison runs differently and is covered in <a href=\"https:\/\/ifanultra.com\/ppr-vs-copper.html\">PPR vs copper<\/a>.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin-bottom: 28px; border: 1px solid #e0e0e0; font-family: inherit;\">\n<caption style=\"text-align: left; font-size: 14px; line-height: 1.6; padding-bottom: 10px;\">Which material to specify, by situation. Source: dimensions from EN 10255:2004+A1:2007 and ISO 15874-2:2013; temperature rating per ASTM F2389 via the Plastics Pipe Institute; corrosion data from Chukhin et al., 2025.<\/caption>\n<thead><tr>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Situation<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Best for<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Why<\/th>\n<th scope=\"col\" style=\"background-color: #19619a; color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #e0e0e0; font-weight: bold;\">Watch for<\/th>\n<\/tr><\/thead>\n<tbody>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Concealed hot water riser<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">PP-R<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Inspected hot-water pipes had fistulas after 3\u20135 years; no universal lifetime<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Calculate flow and pressure drop; two PN20 size steps are only a comparison starting point.<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Cold water, already corroding<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">PP-R<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Existing deposits may restrict the bore; assess restriction and ongoing corrosion<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Verify the actual pressure\u2013temperature duty<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Exposed or impact-loaded run<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Galvanised steel<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Steel may suit impact-exposed runs, but support spacing must follow applicable code and approved design.<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Inspect threaded joints and pipe walls for corrosion.<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Duty outside the offered PP-R rating<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">A separately qualified alternative system.<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">PP-R derates on pressure as temperature climbs<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Check the class, not the material<\/td><\/tr>\n<tr><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Partial retrofit of a steel system<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Both, joined properly<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">Brass-insert fittings carry the transition<\/td><td style=\"padding: 12px 15px; border: 1px solid #e0e0e0; color: #333;\">The mixed joint is the leak risk<\/td><\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"margin: 0 0 28px 0;\">\n<img data-srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-600x400.webp 600w\" loading=\"lazy\" data-src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin.webp\" alt=\"Three cut PP-R pipe sections on white - plain green, white with a fibre-glass composite middle layer visible at the cut, and tan hot-water grade - each beside a pile of matching polypropylene resin granules\" class=\"wp-image-10309 lazyload\" decoding=\"async\"  loading=\"lazy\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" style=\"width:100%; height:auto; border-radius:8px;\"   sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><noscript><img loading=\"lazy\" alt=\"Three cut PP-R pipe sections on white - plain green, white with a fibre-glass composite middle layer visible at the cut, and tan hot-water grade - each beside a pile of matching polypropylene resin granules\" class=\"wp-image-10309\" decoding=\"async\" height=\"1024\" loading=\"lazy\" src=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin.webp\" style=\"width:100%; height:auto; border-radius:8px;\" width=\"1536\" srcset=\"https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin.webp 1536w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-300x200.webp 300w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-1024x683.webp 1024w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-768x512.webp 768w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-18x12.webp 18w, https:\/\/ifanultra.com\/wp-content\/uploads\/2026\/09\/img-ppr-grades-resin-600x400.webp 600w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/noscript>\n<figcaption style=\"font-size: 14px; color: #555; margin-top: 8px;\">Specification does not stop at the material: plain, fibre-glass composite and hot-water grades differ, and duty decides which resin and pressure class is quoted.<\/figcaption>\n<\/figure>\n<div class=\"wp-block-html cta-block\" data-cta=\"decision-quote-1|comparison|decision\" style=\"background: #19619a; border-radius: 10px; padding: 30px 4%; margin: 40px 0; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; box-shadow: 0 4px 20px rgba(0,0,0,0.1);\">\n<div style=\"flex: 1 1 200px; min-width: 200px;\">\n<div style=\"margin-top: 0; color: #ffffff !important; font-size: 28px; line-height: 1.3; font-weight: bold;\">Send us the galvanised sizes you are replacing<\/div>\n<div style=\"font-size: 16px; color: #ffffff !important; line-height: 1.7; margin: 15px 0 25px 0;\">For importers and distributors buying PP-R at container volume: send the existing DN schedule, required flow, design pressure, temperature profile, required application class, destination market and quantities; we will propose PP-R sizes and ratings for approval and confirm the MOQ and production lead time for that order.<\/div>\n<p style=\"margin-bottom: 0;\"><a href=\"https:\/\/ifanultra.com\/contact-us?src=ppr-pipe-vs-galvanized-steel&amp;cta=decision-quote-1\" style=\"display: inline-block; background: #FFFFFF; color: #000000; padding: 14px 28px; font-weight: bold; font-size: 16px; border-radius: 6px; text-decoration: none;\"> Get the bore-matched size list <\/a><\/p>\n<\/div>\n<\/div>\n<h2 id=\"conclusion\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">Conclusion<\/h2>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">PP-R can be a suitable corrosion-driven replacement when its documented rating and installation meet the duty. Keep steel where the approved design requires it for impact, span or operating conditions.<\/p>\n<p style=\"line-height: 1.8; margin-bottom: 28px;\">A preventable purchasing error is copying the old DN schedule onto a PP-R quotation without checking the bore and hydraulics. The same-label calculation shows a geometric risk, not a guaranteed loss of actual flow. Size from the bore, confirm the pressure class against the duty, and check the wall schedule before the container is booked, because that error is invisible on paper and expensive once the system is in the wall.<\/p>\n<h2 id=\"frequently-asked-questions\" style=\"margin-top: 50px; margin-bottom: 30px; font-size: 28px; border-bottom: 2px solid #eee; padding-bottom: 10px; font-weight: bold;\">Frequently Asked Questions<\/h2>\n<div class=\"faq-card\" style=\"margin-bottom: 20px; padding: 25px; background-color: #f9f9f9; border-left: 4px solid #19619a; border-radius: 4px;\">\n<h3 style=\"margin-top: 0; margin-bottom: 15px; font-weight: 700; line-height: 1.3; font-size: 18px;\">What are the disadvantages of PPR pipe?<\/h3>\n<p style=\"line-height: 1.8; margin-bottom: 0;\">Four real ones: a smaller bore at the same DN label, a duty-specific pressure\u2013temperature rating, degradation under sustained UV without a stabilised grade, and support requirements that must follow the manufacturer\u2019s installation rules.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"margin-bottom: 20px; padding: 25px; background-color: #f9f9f9; border-left: 4px solid #19619a; border-radius: 4px;\">\n<h3 style=\"margin-top: 0; margin-bottom: 15px; font-weight: 700; line-height: 1.3; font-size: 18px;\">How do you connect PPR to GI pipe?<\/h3>\n<p style=\"line-height: 1.8; margin-bottom: 0;\">Use a compatible brass-insert transition: socket-fused under the approved system procedure on the PP-R side and threaded to steel. The published representative chart uses 260 \u00b0C under standard conditions. Specify the insert, thread compatibility and sealing method; do not assume every mixed-system connection uses an identical fitting.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"margin-bottom: 20px; padding: 25px; background-color: #f9f9f9; border-left: 4px solid #19619a; border-radius: 4px;\">\n<h3 style=\"margin-top: 0; margin-bottom: 15px; font-weight: 700; line-height: 1.3; font-size: 18px;\">Is GI pipe good for water?<\/h3>\n<p style=\"line-height: 1.8; margin-bottom: 0;\">Assess the actual duty and water chemistry. A study reviewed by Chukhin et al. reports about 0.05 mm\/year at 65 \u00b0C; a separate cited field report concerns roughly one-third zinc-coating loss in 12 months. These are scoped observations, not a general life prediction.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"margin-bottom: 20px; padding: 25px; background-color: #f9f9f9; border-left: 4px solid #19619a; border-radius: 4px;\">\n<h3 style=\"margin-top: 0; margin-bottom: 15px; font-weight: 700; line-height: 1.3; font-size: 18px;\">Is PPR cheaper than GI pipe?<\/h3>\n<p style=\"line-height: 1.8; margin-bottom: 0;\">Raw-material benchmarks alone do not establish a pipe-price saving; compare delivered, bore-matched quantities and local installation costs. Delivered pipe prices and labour rates are local, so the honest answer is to price both locally against a bore-matched schedule.<\/p>\n<\/div>\n<div class=\"faq-card\" style=\"margin-bottom: 20px; padding: 25px; background-color: #f9f9f9; border-left: 4px solid #19619a; border-radius: 4px;\">\n<h3 style=\"margin-top: 0; margin-bottom: 15px; font-weight: 700; line-height: 1.3; font-size: 18px;\">Does PPR pipe really last 50 years?<\/h3>\n<p style=\"line-height: 1.8; margin-bottom: 0;\">The 50-year figure is an ISO 9080 extrapolation of the material strength curve, not a 50-year test; it is not an unconditional service-life guarantee. Material grade, duty, water chemistry and installation all require review.<\/p>\n<\/div>\n\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What are the disadvantages of PPR pipe?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Four real ones: a smaller bore at the same DN label, a duty-specific pressure\u2013temperature rating, degradation under sustained UV without a stabilised grade, and support requirements that must follow the manufacturer\u2019s installation rules.\"}}, {\"@type\": \"Question\", \"name\": \"How do you connect PPR to GI pipe?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use a compatible brass-insert transition: socket-fused under the approved system procedure on the PP-R side and threaded to steel. The published representative chart uses 260 \u00b0C under standard conditions. Specify the insert, thread compatibility and sealing method; do not assume every mixed-system connection uses an identical fitting.\"}}, {\"@type\": \"Question\", \"name\": \"Is GI pipe good for water?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Assess the actual duty and water chemistry. A study reviewed by Chukhin et al. reports about 0.05 mm\/year at 65 \u00b0C; a separate cited field report concerns roughly one-third zinc-coating loss in 12 months. These are scoped observations, not a general life prediction.\"}}, {\"@type\": \"Question\", \"name\": \"Is PPR cheaper than GI pipe?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Raw-material benchmarks alone do not establish a pipe-price saving; compare delivered, bore-matched quantities and local installation costs. Delivered pipe prices and labour rates are local, so the honest answer is to price both locally against a bore-matched schedule.\"}}, {\"@type\": \"Question\", \"name\": \"Does PPR pipe really last 50 years?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 50-year figure is an ISO 9080 extrapolation of the material strength curve, not a 50-year test; it is not an unconditional service-life guarantee. Material grade, duty, water chemistry and installation all require review.\"}}]}<\/script>\n\n<div class=\"author-box\" style=\"border-top: 2px solid #19619a; padding: 18px 0 0 0; margin: 32px 0 0 0;\">\n<p style=\"margin: 0 0 4px 0;\"><strong>Written by Justin<\/strong>, Technical &amp; export team at IFAN ULTRA.<\/p>\n<p style=\"margin: 0; font-size: 14px; color: #555;\">Reviewed 17 September 2026. Standards cited: EN 10255:2004+A1:2007; ISO 15874-1:2013; ISO 15874-2:2013 with Amd 1:2018 and Amd 2:2022; ISO 9080; ASTM F2389. <a href=\"https:\/\/ifanultra.com\/about-us\" rel=\"author nofollow\">Profile<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Compare PP-R and galvanised steel by bore, operating duty and installed scope. Check rating evidence and request a comparable retrofit quotation.<\/p>","protected":false},"author":1,"featured_media":10305,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[738,737,597,739,59,736],"class_list":["post-10310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products","tag-en-10255","tag-gi-pipe","tag-iso-15874","tag-pipe-sizing","tag-ppr-pipe","tag-ppr-vs-galvanized-steel"],"_wp_attached_file":null,"_wp_attachment_metadata":null,"_elementor_source_image_hash":null,"siteground_optimizer_is_optimized":null,"siteground_optimizer_webp_conversion_attempts":null,"siteground_optimizer_is_converted_to_webp":null,"_imagify_optimization_level":null,"_imagify_status":null,"_imagify_data":null,"siteground_optimizer_webp_conversion_failed":null,"_elementor_is_screenshot":null,"siteground_optimizer_optimization_failed":null,"_wp_attachment_image_alt":null,"siteground_optimizer_original_filesize":null,"siteground_optimizer_compression_level":null,"_wp_attachment_context":null,"_oembed_82dd7f3bc7d904a506ef753b51e09e65":null,"_da_map_highlight_color":null,"_da_map_highlight_opacity":null,"_da_map_border_color":null,"_da_map_border_opacity":null,"_da_map_border_width":null,"_da_map_title_color":null,"_da_map_text_color":null,"_da_map_background_color":null,"_wp_desired_post_slug":null,"envato_tk_source_kit":null,"envato_tk_source_index":null,"_elementor_screenshot_failed":null,"_elementor_popup_display_settings":null,"_wp_trash_meta_status":null,"_wp_trash_meta_time":null,"envato_tk_manifest":null,"envato_tk_folder_name":null,"envato_tk_builder":null,"envato_tk_source_zip_url":null,"_menu_item_type":null,"_menu_item_menu_item_parent":null,"_menu_item_object_id":null,"_menu_item_object":null,"_menu_item_target":null,"_menu_item_classes":null,"_menu_item_xfn":null,"_menu_item_url":null,"_wp_old_date":null,"_yoast_wpseo_is_cornerstone":null,"_yoast_wpseo_schema_page_type":null,"_yoast_wpseo_primary_category":null,"_is_githuber_markdown_enabled":null,"total_sales":null,"_tax_status":null,"_tax_class":null,"_manage_stock":null,"_backorders":null,"_sold_individually":null,"_virtual":null,"_downloadable":null,"_download_limit":null,"_download_expiry":null,"_stock":null,"_stock_status":null,"_wc_average_rating":null,"_wc_review_count":null,"_product_version":null,"_yoast_wpseo_primary_product_cat":null,"_yoast_wpseo_primary_product_brand":null,"_eb_attr":null,"_yoast_wpseo_opengraph-title":null,"_yoast_wpseo_opengraph-description":null,"_edit_lock":null,"_eael_post_view_count":"297","_edit_last":null,"_yoast_indexnow_last_ping":null,"_elementor_edit_mode":null,"_elementor_template_type":null,"_wp_page_template":null,"_elementor_version":null,"_elementor_pro_version":null,"ekit_post_views_count":"195","_elementor_source":null,"_elementor_page_settings":null,"_elementor_data":null,"_eael_custom_js":null,"_elementor_conditions":null,"__elementor_forms_snapshot":null,"_elementor_controls_usage":null,"_eb_reusable_block_ids":null,"_elementor_css":null,"_elementor_page_assets":[],"_elementor_element_cache":null,"_elementor_screenshot":null,"_eael_widget_elements":null,"_oembed_7befe71c04536851b6485e7b012d3f0d":null,"_oembed_time_7befe71c04536851b6485e7b012d3f0d":null,"_yoast_wpseo_focuskeywords":null,"_yoast_wpseo_keywordsynonyms":null,"_yoast_wpseo_estimated-reading-time-minutes":null,"_yoast_wpseo_content_score":null,"_oembed_ce224e772774dff8a036b24d2a67cf56":null,"_oembed_time_ce224e772774dff8a036b24d2a67cf56":null,"_yoast_wpseo_focuskw":"ppr pipe vs galvanized steel","_yoast_wpseo_metadesc":"Compare PP-R and galvanised steel by bore, operating duty and installed scope. Check rating evidence and request a comparable retrofit quotation.","_yoast_wpseo_linkdex":null,"_is_githuber_mermaid":null,"_is_githuber_katex":null,"_is_githuber_mathjax":null,"_is_githuber_markdown":null,"_githuber_prismjs":null,"_githuber_highlightjs":null,"_is_githuber_sequence":null,"_is_githuber_flow_chart":null,"_yoast_post_redirect_info":null,"_thumbnail_id":"10305","_yoast_wpseo_title":"PPR vs Galvanised Steel: When to Switch, What It Costs","_wp_old_slug":null,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>PPR vs Galvanised Steel: When to Switch, What It Costs<\/title>\n<meta name=\"description\" content=\"Compare PP-R and galvanised steel by bore, operating duty and installed scope. 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