May 1, 2006 · 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 12.7 mm, and the weld is 100% X-rayed.

Aug 4, 2019 · The issue is that B 31.3, for some reason, still doesn't like Welded pipe. Table 302.3.4 has longitudinal weld joint quality factors for different types of welded pipe. EFW is 0.95, but can be raised to 1.0 with additional radiography. Therefore for EFW there should be only a small or no difference in wall thickness or other stress factor.

Dec 29, 2012 · I've got a small-diameter lethal service vessel per ASME Section VIII Div 1 with a 316SS metallurgy. I called for ASME SA312-TP316 EFW for the shell and nozzles, with 100% RT. My code gurus are objecting to the SA312 specification though under two theories: A) EFW is too similar to ERW. ERW...

Aug 27, 2002 · With ERW pipe, all of the quality control and inspection in the world won't improve the Joint Efficiency Factor. With EFW pipe, the Efficiency Factor can be improved up to 1.0 (100%) depending on the amount of additional radiography you specify above and beyond what is required per the pipe specification for your material.

Jun 3, 2021 · The below is our main confusion about EFW 1-The Project MTO description,is included different,EFW.ERW and SAW Pipes items. 2-If EFW is subsidery of SAW ,Why has a different pipe description in MTO. 3-According to B31.3 .There is EFW with & Without filler metal definition. 4-As I understant ,EFW without filler metal is ERW(Please confirm!)

Jun 13, 2024 · Hi, Is it technically a bad option to go for SS EFW pipes for all sizes from 15NB and higher. I've referred few Pipe material Specifications where Seamless pipes are used upto 200NB and above 200NB they're generally EFW pipes. Is it possible to 100% radiograph small size EFW pipes for SS and...

Feb 21, 2001 · 3) Manufacturing Tolerances. ERW pipe typically has a manufacturing tolerance of 0.01" while seamless has a tolerance of 12.5%. This will affect the wall thickness calculations. It is also easier for the manufacturer to make the wall thickness on ERW pipe closer to the -0.01" tolerance than the -12.5% on seamless.

May 14, 2015 · I have a certificate of a welded pipe where it's written that material is according to "ASME II PART.A" and "ASME SA 312 TP 304L" and also "EFW" (electric-fusion welded). However, in ASME SA 312 par.6.1.3, when pipe is welded, the abbreviation to be used is "WLD".

Jul 29, 2008 · "B31.3 Table 302.3.4 states it is not permissible to increase the E of type 1 or 2 joints. ERW pipe is a type 2 joint. If you cannot increase the E for pipe, how can increase the E for a vessel ?" B31.3 does not define "type 1 or type 2 joints". Table 302.3.4 has several illustrations of LONGITUDINAL seam welds.

Jun 22, 2010 · Bends using proper bending mandrels of reasonable bend radius can be done irrespective of weld seam orientation. Others may be able to comment on differences between EFW and ERW or to provide advice on an optimal weld seam orientation, but when multiple bends are done you will end up with the weld seam in the wrong orientation at some point anyway.