Det Norske Veritas - Germanischer Lloyd

FACTORY APPLIED EXTERNAL PIPELINE COATINGS FOR CORROSION CONTROL
 N DNV-RP-F106

Annotation

This Recommended Practice (RP) has been prepared to facilitate the specification and execution of coating application work. The RP covers the application of specific types of linepipe coating systems as referred to below. The use of this RP implies the involvement of Purchaser in quality control aspects, including review of procedures and inspection/testing plans for coating application, witnessing of qualification tests (PQT) for coating and acceptance of documentation of quality control (Daily Log formats and index for Final Documentation) prior to start of production in order to ensure that the produced coating meets all requirements of this RP and ISO 21809-1.

Guidance note:

The requirements to design and quality control are in compliance with ISO 21809-1, but with some additions. This means that compliance with this RP ensures full compliance with ISO 21809-1.

This RP covers the process of applying external coating systems for corrosion control of submarine pipelines at the coating plant, and includes the qualification, implementation and documentation of this process. The following coating systems are covered:

1) Single layer fusion bonded epoxy*).

2) 3-layer coating based on an inner layer of fusion bonded epoxy (FBE) applied by spraying, an intermediate adhesive layer applied by spraying or extrusion, and an outer jacket of polyethylene (PE) applied by extrusion*).

3) 3-layer coating based on an inner layer of FBE applied by spraying, an intermediate adhesive layer applied by spraying or extrusion, and an outer jacket of polypropylene (PP) applied by extrusion.