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ASTM A53 vs API-5L

ASTM A53 vs API-5L

ASTM A53 vs API-5L

I am trying to do some wall thickness calculations on existing pipe in a refinery.  The old isometrics that I am working off of specify the pipe as "SCH20 BEVLED SMLS/EFW PIPE CS ASTM-A53,OR,API-5LGRB".  ASTM A53-B can be either electric resistance weld (ERW) or seamless.  The EFW (electric fusion weld) in the description is confusing me.  Is API-5L piping available as EFW?  (I don't have ready access to the API standards.)  I am specifically trying to find out what kind a joint factor I can use in my calculations.  For what it's worth, the drawings are from 1976, and I don't have access to the API or ASTM standards of that era.  Anyone have any suggestions?

RE: ASTM A53 vs API-5L

I understand that the joint efficiency of API 5L for ERW is less than EFW. You may use the factor 0.85 in your calcualtion.

RE: ASTM A53 vs API-5L

Is there any code where i can get comparison between ERW & EFW?

Take care :)

RE: ASTM A53 vs API-5L

The quality factors are shown in ASME B31.3 Appendix A.

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