Out of roundness for piping

[tong tong]

Dear All

Regarding above mentioned subject, i would like to know the permissible limit of out of roundness for piping(straight pipe) because one of  our new spool found dented during fabrication. For vessel it clearly stated on ASME VIII div. 1 UG-80 but for piping B31.3 not. Only clause 332.2.1 bend flattening i found and guess related. Can i use 332.2.1 or UG-80 as a acceptance criteria. Please help me my friends. Your kind help is highly appreciated

Regards

Tong2je

[Adi]

Shall not be exceed 1.5% of the spcified outside Dia
see General requirement specification for CS PIPEs, ASME SA530 clause
10
permissible variation in outside diameter

Adi

[MNS]

Yes, it shall not exceed 1.5% of OD as per Clause 10.2.1 of ASME SA
530 (specialised CS and AS tubes)
Also refer Clause 8.2.1 of ASME SA 450 (CS, AS, SS tubes) which will
give you 0.5mm for less than 1inch and 2% of the OD for above 1inch.
Please choose based on your requirement
Thanks
Senthil

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[Ramprasad Chari]

Have a look at SA530 CL10 & Table 2

Regards

Aarpee

[Rajneesh Gaur]

Good afternoon,

I need to check the soundness of the W3 weld as indicated in the attached drawing extract by using UT as per client’s requirement. Can someone guide me if it is possible, and if it is possible, then can someone tell me how.

This is a 4” nozzle to shell weld with RF pad welded on it.

 

Regards

Rajneesh

[Vinayak Kale]

ASME 31.3 is silent about the subject , if you refer to API 5L , limit is specified clearly but it again depends under which codes are you working


Thanks & Best Regards,

Vinayak Kale
E & C  DIv. QA & I , OGSP
Larsen And Toubro Ltd
Powai , Mumbai
vinaya...@lntenc.com
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[Shashank Vagal]

Rajaneesh, Please take it on a word format file and give dimensions, identify N1 also. Then comments can be given on the figure itself. .Shashank Vagal --- On Sun, 4/10/09, Rajneesh Gaur <rajnee...@gmail.com> wrote:

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[manish pandey]

Hello Rajnish, i do agree to the suggestion one you already have.....

it all depends on the expertise of the UT Operator.

but at the first go, you can check it from from the vessel inside with normal miniature probe, if accessibility is restricted !.

and further with angle probe from the sides for optimum coverage...

--
Manish Kumar,
Welding Engineer,
QA-Welding, Modular Fabrication Facility
Larsen & Toubro, Surat, Gujrat

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