Max allowable machining thickness for qualifying PQR

[JITHIN GOPINATH]

Sir,

Can anyone advice me about the maximum allowable machining thickness for qualifying PQR.

For example I have a pipe with thickness 15.88 I want to reduce the thickness to 12.6 is that possible? If there any limitations for machining the thickness..

Please advise...

Regards

Jithin

[Vishwas Keskar Welding Manager WELDING]

Jithin 

Query is not clear 

Pl. spell out clearly what is the  query  including background of the PQR in detail

Thanks 

Vishwas - IWE 

[xuanth...@gmail.com]

No problem sir, the range qualify will be base on the actual thickness of test coupon/

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[biennd]

Taping to matching thickness --> ok.

[Baqer Shabbeer]

if you specify the design code, it will be easier to respond to your inquiry. However, according to ASME B31.3 you can Taper the wall thickness maximum to 30 degree.

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[paresh patel]

You can do machining as per your requirement But for qualification range your governing thickness will be 12.6mm. 

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