THICKNESS TOLERANCE MAY APPLY TO MEET THE PIPE SCH

[CREERAAM]

Dear EXPERTS,


Good Morning,


we were Mistakenly Pre Insulated the CS PIPE(ASTM A 53 Gr.B ERW)of 12 Inch SCH STD Pipe Instead of Doing 12 Inch SCH 40 Pipe. So Can i Have the option to apply the Thickness Tolerance Here to meet the SCH STD Pipe to SCH SCH 40.


NOTE : Customer Required SCH 40 Pipe Only.

SIZE OD 323.9MM Thickness SCH STD = 9.53 mm and SCH 40 = 10.31 mm.

Thanks in Advance.

REGARDS,

G.SRIRAM.

Dream,Dream,Dream Dream transforms in to thoughts.And thoughts result in action

 

[MickMc]

CREERAAM,

I would think only if the measured thickness of the SCH STD meets the SCH 40 minus mill tolerance which I assume you mean by Thickness Tolerance. Even if this is the case customer will have to be consulted and accept.

 

[LittleInch]

I'm not sure I agree with this idea, but IF you did, then you need to measure EVERY pipe over its entire length to demonstrate that the ACTUAL thickness of the pipe is above the minimum. Normal tolerance on a Sch STD pipe would be under the tolerance of a Sch 40 pipe.

as its ERW, it probably came in as plate, so should be a fairly uniform thickness.

However please don't try and hide it from the client - it needs to be submitted as a deviation request and expect it to be rejected.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Don56]

Was the pipe hydrostatically tested at the required pressure given in table X2.2? Std= 1060 psi Sch 40= 1150 psi.

 

[KevinNZ]

STD pipe even if it is within the 12.5% tolerance for SCH40 pipe will not meet the weight/length tolerance required for SCH40 pipe.

 

[CREERAAM]

Dear Experts,

Thanks to all for your Valuable Comments. We Rejected Customer Not ACCEPTED.



REGARDS,

G.SRIRAM.

Dream,Dream,Dream Dream transforms in to thoughts.And thoughts result in action