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DNVGL-RP-B204

Welding of subsea production system equipment

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Organization: DNVGL
Publication Date: 1 October 2020
Status: active
Page Count: 68
scope:

This recommended practice (RP) provides the technical requirements for welding of subsea equipment. This includes requirements for quality assurance, welding procedure qualification, non-destructive testing and inspection, and welding and inspection personnel. The scope covers welding of the following pressure retaining equipment:

- subsea wellhead and tree equipment as per ISO 13628-4 or API Spec 17D

- manifolds as per ISO 13628-15 or API RP 17P

- flowline connectors and jumpers as per API RP 17R

- workover riser systems as per ISO 13628-7 or API Std 17G

- control systems consisting of small-bore tubing and piping as per ISO 13628-6 or API Std 17F.

The following types of welds between forged or hot isostatic pressing (HIP) materials and pipe materials are included:

- girth welds in carbon steels (CS) and low alloy steels (LAS) with and without internal cladding

- corrosion-resistant overlay welding with corrosion-resistant alloys (CRA), i.e. cladding, load bearing and non-load bearing

- girth welds of dissimilar materials, including LAS and Ni-based buttering

- girth welds in 22Cr and 25Cr duplex stainless steels

- single sided girth welds in small-bore tubing and piping in selected CRA materials, i.e. duplex and austenitic stainless steels and nickel alloys, typically 22Cr and 25Cr duplex, AISI 316L, XM-19, 6Mo, alloy 625.

Document History

DNVGL-RP-B204
October 1, 2020
Welding of subsea production system equipment
This recommended practice (RP) provides the technical requirements for welding of subsea equipment. This includes requirements for quality assurance, welding procedure qualification, non-destructive...
September 1, 2019
Welding of subsea production system equipment
This recommended practice specifies the technical requirements for welding subsea equipment. This includes requirements for quality assurance, welding procedure qualification, non-destructive testing...
April 1, 2019
Welding of subsea production system equipment
This recommended practice specifies the technical requirements for welding subsea equipment. This includes requirements for quality assurance, welding procedure qualification, non-destructive testing...

References

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