NS EN 288-9 : 1ED 1999

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
    3.1 Repair
    3.2 Full penetration repair
    3.3 Internal repair
    3.4 Make
4 Preliminary welding procedure specification (pWPS)
5 Welding procedure test
6 Test piece
    6.1 General
    6.2 Shape and dimensions of test pieces
    6.3 Welding of test pieces
7 Examination and testing
    7.1 Extent of testing
    7.2 Location and cutting of test specimens
    7.3 Non-destructive examination
    7.4 Destructive tests
    7.5 Re-testing
8 Range of approval
    8.1 General
    8.2 Related to the manufacturer
    8.3 Related to the material
    8.4 Common to all welding procedures
    8.5 Specific to processes
    8.6 Period of validity
9 Welding procedure approval record (WPAR)
Annex A (normative) Repairs
Annex B (informative) A-deviations
Annex C (informative) Welding procedure approval record form

Defines the procedure test for approving a welding procedure specification for on land and offshore site butt welding of transmission pipelines under normal atmospheric conditions, to be carried out according to this standard unless extra tests are specified by the relevant application standard or contract where applicable. Specifies the conditions for executing welding procedure approval tests and validity limits of an approved welding method for all practical welding operations listed. Applicable to arc welding of steels in groups 1, 2 and 3 in accordance with CR 12187 and can be applied to other fusion welding processes if agreed between contracting parties.