公开(公告)号：US20170232649A1

公开(公告)日：2017-08-17

申请号：US15518544

申请日：2015-10-14

Applicant: SHAWCOR LTD.

Inventor： Adam Wright ,  Ole Thomas Ulstad ,  Magna Skinstad

IPC: B29C45/14 ,  F16L58/18 ,  F16L58/10 ,  F16L13/02

CPC classification number: B29C45/14491 ,  B29C45/14336 ,  B29C45/14614 ,  B29K2023/12 ,  B29L2023/22 ,  F16L13/0272 ,  F16L58/1054 ,  F16L58/181

Abstract: A method of coating a field joint, pipe sections for forming a coated field joint, and a coated field joint formed thereby. First and second angular cut backs are provided in the parent coating of each pipe section. The first angular cut back is at an angle of about 30°±5° relative to the longitudinal axis of the field joint, and the second angular cut back is positioned further from the field joint than the first angular cut back. The first and second angular cut backs result in the parent coating having a stepped profile, a step in the stepped profile between the first and second angular cut backs, the is substantially parallel to the longitudinal axis of the field joint and is free of indentations. The field joint coating is injection moulded to have an upstand that is less than or equal to about 5 mm.