DNV DNV-CP-0252 [ Active ]

This programme gives requirements to manufacturers of steel pipes and steel pipe fittings, including the manufacturer's welding workshop and heat treatment facilities, see also DNV-CP-0352 and DNV-CP-0351 respectively.

This AoM programme covers the approval of manufacturers of products indicated in Table 1.

Manufacture of structural hollow sections is not covered by this programme, but approval shall follow DNV-CP-0347.

Approval for steel pipe fittings made by casting or forging shall follow DNV-CP-0246 Sec.1 and DNV-CP-0247, respectively.

The product(s) used for approval testing, see Sec.2, will place limitations on the range of approval. The approval will be limited to:

— each steel type group or material grade, see App.A

— carbon and carbon-manganese (C and C-Mn) steels

— the individual alloy steels

— the individual stainless steels

— each application area, see Table 1

— product type (i.e. pipes and/or fittings)

— manufacturing method (i.e. welded and/or seamless)

— the maximum dimensions (diameter, thickness)

— heat treatment condition

— for pipe fittings the approval is also limited to each manufactured type (such as tees, elbows, reducers).

When applicable, specific approval will be given on the certificate for the following additional condition:

— automated non-destructive testing in place of hydraulic testing

— austenitic and duplex (ferritic/austenitic) stainless steel pipes supplied in as-welded condition as qualified.

The approval is limited to the material grade for which approval tests are carried out, but certain grades may also cover other grades in the same steel type group, or the entire steel type group, as explained in App.A.