PPR welding temperature is fixed at roughly 260°C for socket heat fusion, and that single number does most of the work on every joint you make. The variable that actually changes from fitting to fitting is not the temperature dial — it is time. A DN20 pipe needs about 5 seconds on the die, while a DN63 needs roughly 24 seconds, and getting those seconds wrong is the difference between a joint that lasts 50 years and one that weeps behind a wall.<\/p>\n\n
This is a working reference for the whole size range, built around a fusion-time chart you can save to your phone. It sits inside our broader PPR pipe guide<\/a>, and pairs with the full PPR heat fusion installation walkthrough<\/a> if you want the step order rather than the timing detail. Every figure below is a typical starting point — your fusion tool maker’s own chart and the site’s ambient temperature always win over a generic table.<\/p>\n\n