The OTI 95 635 reference in NACE MR0175


During the last ISO/TC 67 plenary meeting on 2012-09-19/20 in Rio the UK delegation had a request to the ISO 15156 MP regarding ISO 15156-2. Following resolution was taken and is in the minutes: Resolution 2012/08 (Rio de Janeiro, 2012) The British delegation, noted that ISO 15156-2 includes a reference to the British publication OTI 95 635, Testing method to determine the susceptibility to cracking of line pipe steels in sour service. This publication is about 20 years old and the British delegation would request the ISO 15156 Maintenance Panel under WG 7 to review whether this British publication is still needed and if so to develop an international standard on this subject, so that the British publication could be withdrawn. Additional information: • OTI 95 635 can be found via: https://www.hse.gov.uk/research/otipdf/oti95635.pdf • The document is mentioned only in ISO 15156-2: B.4.3 Full pipe ring tests Full pipe ring tests may be used. The document HSE OTI-95-635 describes a test and acceptance criteria. NOTE Residual stress has been shown to play an important role in the initiation of SOHIC and SZC. It is sometimes considered that such stresses in field situations are better represented in large-scale specimens. and in Bibliography [27] HSE OTI-95-635 7), A test method to determine the susceptibility to cracking of line pipe steels in sour service 7) UK Health and Safety Executive, HSE Books, PO Box 1999, Sudbury, Suffolk CO10 2WA, UK [ISBN 0-7176-1216-3].


Developing a new international standard is outside the scope of the Maintenance Panel. The British publication is still assumed to be technically relevant, but the OTI 95 635 reference will be removed if the publication is withdrawn.

This question is in relation to NACE MR0175/ISO 15156-2 Annex B.4.3

Reference: ISO 15156 Maintenance Panel Inquiry #2012-10.

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