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.
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...