New industry initiative on subsea welding

The welding of subsea pressure retaining equipment is key in ensuring safe and high-quality performance. However, different end user requirements are added to regulatory requirements for subsea welding, without a clear guidance on best practice. A DNV GL led joint industry project (JIP) now addresses this by harmonizing the end user requirements into one industry standard. The project still welcomes new participants.

Several specifications and standards for welding of subsea pressure containing equipment exist today, ranging from the major oil and gas operator’s company specific requirements to regulatory requirements and standards issued by API, ASME and ISO. This is causing a range of challenges such as varying welding qualities, repeated qualification processes, difficulties in planning procurement and unclear requirements for inspection and testing.

The new DNV GL JIP, kicked off in February 2017, aims to tackle the lack of standardization by developing a guideline that harmonizes requirements for welding of subsea pressure retaining equipment. The objective is to reduce cost and time while improving quality through reduced project uncertainty and non-value added work.

The JIP is scheduled for completion in Q2 2018 and then the guideline will be issued as a new DNV GL recommended practice.

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