Thursday, September 10, 2020

Re: [MW:31417] Welder qualified 2 7/8 OD, whether he can weld 2” NPS

What matters is neither DN nor NPS. What actually matters is the actual outside diameter

Στις Τετ, 9 Σεπ 2020 στις 6:57 π.μ., ο/η Murali Krishnan <muraligkrishnan@gmail.com> έγραψε:
Greetings,

I have a weldolet 2" NPS X OD 82 mm, I want to use the welder qualified for 2 7/8 (73 mm) & over.

Query initiated by client that as per ASME SEC IX Table QW 452.3 foot note (b) states that 2 7/8 in. (72mm) O.D. is the equivalent of NPS 2 1/2 (DN 65). In this case the welder client says welder is not qualified for 2 inch NPS.


since the welder qualification essential variable is OD inline with ASME SEC IX, kindly advice.

If any reference kindly share the same.

Thanks 
Murali


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Thanks and Best Regards,
 
G.Murali krishnan
Mob : +966-501487307
Saudi Arabia

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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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