Question:
Ref Part 2 Figure 2 Butt Weld Survey method for Vickers Hardness Measurement. Location points 17, 18 & 19. What are the acceptance criteria? Table A.1 only provides acceptance for the Weld Cap and Root. As the area is not exposed should the acceptance level be 275 HV 10?
Answer:
Since it is not at the cap the acceptance level should be 250 HV 10 unless it is proven that it can be relaxed. For now there is no demonstrated evidence to show that 250 Hv can be relaxed at location points 17, 18, and 19 of Part 2 Figure 2.
This question is in relation to NACE MR0175/ISO 15156-2 Clause 7.3.3 Figure 2 Table A.1
Reference: ISO 15156 Maintenance Panel Inquiry #2009-04
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With a wealth of experience in the oil and gas industry, we provide independent materials and corrosion consultancy to help companies reduce risk, save money and apply best practice in their oil and gas businesses.
Find out more by getting in touch – you’ll get an answer from a qualified, experienced materials engineer every time.
US: 877-399-1010 (toll free)
UK: +44(0)1144000850
66 Eldon St
Sheffield
S1 4GT
United Kingdom