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PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint

PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
The weeping butt-fusion weld, exposed after excavation.

Butt-fusion welds on PE mains are the classic weak point: a small inclusion or a cold joint shows up months later as a slow weep along the seam. Cutting the weld out means two new welds, a shutdown and a cure time — costs the operator rarely wants on a live main.

PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
The clamp is seated over the weld band and bolted down.

A weld-seam clamp has a body long enough to span the entire weld band, not just the visible weep. It is opened over the pipe, centred on the weld, and the bolts are tightened evenly so the gasket seals on sound pipe either side of the seam.

PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
Weld fully covered — the joint is sealed and the main is back at operating pressure.

The weld is now fully encapsulated. The repair is mechanical, so service resumes immediately and the trench can be backfilled the same day.

PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
Issue
PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
Installation
PE Butt Weld — Weld-Seam Clamp Seals a Weeping Joint
Completed

Record

Site

Pingyao, Shanxi, China

System

PE water main — butt-fusion weld

Condition

Butt-fusion weld on a buried PE main weeping along the seam; joint exposed for the repair.

Supply

Moulded steel weld-seam repair clamp, long body covering the full weld band.

Status

Weld covered and sealed without cutting the pipe; line stayed in service throughout.

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