A106 Gr B Pipe Lowest Temperature

[Lassaad]

Dear Experts,
We faced a small problem with one of our client, regarding the lowest temperature that Could be stand by à A105 GrB. We told him that as per ASME B31.3 We can allow up to -29 deg C. Where, according to one of his piping spec they mention for thé same to only -15 deg C.
Having a à scenario in which thé température in thé concerned Line Could reach -15 deg C, thé client asked us to replace thé pipe or provide à Third Party certificate to support that up to this température of -15 deg C, there'll be on problem.
My questions are:
1-As per Asme, is there any susciptibility of the -29 deg in relation to pipe WT (3/4" limit)?
2-Could thé MTC cover that avoiding the TP?
3-What is our proposal to settle this issue

Many thanks

Envoyé de mon iPad

[Raghuram Bathula]

Gnerally B31.3 exempts impact testing @ -29 °C for thickness upto 12.7mm (1/2")

if the thickness exceeds the limits specifed (i.e falls below the curve provided in B31.3) you may use it with imapct etsting, Since your contract specification limit for A106 Gr.B is upto -15 °C, you may carry out the CVN impact testing and produce the results to cleints satisaction. 

[Lassaad]

Many thanks,

Is thé coupon of thé same pipe size and material used for PQR make It?

Envoyé de mon iPad

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