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david339933 -> Thanks mate. Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull not to charge on you because you're a vegetarian.

Hello Experts, As per ASME B31.3 2016 table 331.1.3, P1 materials are exempted to mandatory PWHT and for nominal wall thickness above 25mm an additional pre-heat of -95deg C is required. Is the exemption only applicable provided the provisions in paragraph 331.2.2 "Exceptions to Basic...

@Weldstan, currently I am at a Russian construction site. Yes Russian regulations put a lot of emphasis on the NDT requirements with regards to fluid carried and characteristics(several cases), unlike ASME where we you only have Cat D,Normal and Cat M, severe cyclic conditions. Their requirement...

Dear Experts, I would like to get your professional opinions/answers with regard to subject. According to Russian Regulation: "Positive material identification shall be performed for all welded joints of alloy steel pipelines of Category I, or transporting media of Group A(a), or operating...

-So the NDE percentage/requirement of the particular pipeline where it is attached, will also apply to this weld? -What exactly does permanent nonstructural attachment means? Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull not to...

Dear Experts, Hello again, regarding Integral attachment for piping like support shear lugs(welded to pipe), any specific NDT requirements for this welds according to ASME B31.3? Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull...

Thanks for all of your input guys. Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull not to charge on you because you're a vegetarian.

4)%C=0.25, WPS states that Preheat temp. should be minimum 100-120°C ; Preheat Maintenance Resistant heaters/Gas Torches, so aside from WPS nothing else. Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull not to charge on you...

2) What exactly do you mean with "but currently we have below 10 deg.C ambient temperature"? Is it 10 °C ambient or -10 °C ambient? And which requirement do you mean with "does the requirement in the mentioned WPS does make sense during welding at low ambient temperature"? Also, you have an NPS...

Dear Experts, Our client has this requirement in their WPS regarding pre-heating of A333Gr.6 and A671 material(pipe) with nominal wall thickness of 20mm-50mm to min.temp of 100-120 deg.C and pre-heat maintenance is also required by using resistance heaters/gas torches, maximum interpass...

@metengr, thanks for your reply, I understand it is a non-conformance according to the relevant standard but what I mean is in the design point of view does it has such impact or to the material itself? note: PWHT and NDE were successfully performed and found acceptable as per requirement...

Dear Experts, As per Russian Standard GOST 32569:2013 paragraph6.8.1 The distance between the adjacent annular butt-welded joints shall not be less than a threefold value of the nominal thickness of the parts to be welded, but not less than 100 mm for diameters up to and including 219 mm, not...

Hi Pradip, XL83NL Thanks guys for all of your inputs, appreciate it a lot. We issued NCR to contractor and the pipe will be replaced. All in all it was a case of lack of supervision during welding, inexperience of the welder and pressure to finish the welds in a short time and to produce more...

@XL83NL Thanks for your input. So in that case what you did to the warped pipe? was it repaired? Regards, Delikado Expecting life to be fair on you because you're a good person, is like expecting an angry bull not to charge on you because you're a vegetarian.

Hello metengr and MJCronin, The Pipe is NPS 20 and WT 9.53(Std) A671 Material.

Any recommendation on how to practically repair/correct a banana-warped pipe due to weldolet welding?Heat treatment? and does anybody knows about allowable distortion mentioned in ASME or EN? I searched already but was not successful though. I would appreciate for any advice.