Technical Guides

This article explains why clamp insert design changes as butt fusion machine size increases, including differences in contact area, clamping stability, one-piece structures, widened inserts, and aluminum clamp design for large HDPE pipe welding.

This article explains the basic pressure and time parameters used in HDPE butt fusion welding, including P1, P2 and P3, and shows how jointing pressure is calculated using pipe dimensions, interfacial pressure, piston area and drag pressure. Calculation examples based on ISO 21307:2017 and DVS 2207-1 are also included, together with a link to an online butt fusion pressure calculator.

Learn how to inspect PE pipe butt fusion joints through fusion bead profiles, identify welding defects, and understand factors affecting joint quality.