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  1. ngot

    EFW vs. SAW

    EFW and ERW are not the same. EFW is Electric Fusion Welding, a welding process without filler. Thanks for the link, I will see if it will give my something.
  2. ngot

    EFW vs. SAW

    Hi We have specified 42” and 34” pipe in API 5L Gr. B EFW, with HIC resistant test complying with NACE MR0103, TM 02-84 and TM-01-77. The pipe is in a service where wet H2S might appear. One of our supplier have offered us 42” and 34” API 5L Gr. B, PSL 2, SAW, NACE MR0175. The wall thickness is...

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