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[MW:12316] Query / Machining of Sch 40 to Sch 30 / 24" RF WN Flange

By Materials & Welding
Dear All,
 
I would like to know whether standard ASME B 16.5 do allow machining of bevel edge to achieve required thickness?
The material is  24" WN RF Flange A105 ,Class 150- NACE , Normalised.
 
We are not able to procure standard fitting and done machining to achieve Sch 30 from Sch 40. Please note, not to entire length.
The dimension and thickness is verified and a Certificate of Compliance is produced.
 
Please advise with evidence(supporting Code) whether the material could be ACCEPTABLE.
 
Thanks & Regards
Vino-Doha
 

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