[banerj1s]

I agree with Bob that B31.3 does provide guidance on Formal Stress Analysis criteria but it stops short of specifying what should be the temperature or size where a formal analysis is required. So the minimum temperature as covered by B31.3 is as per Table A-1 which is the minimum temperature for the material. However for analysis below 29 deg C the analysis is in cryogenic zone that requires special considerations. Normally the allowable stress range is reduced to 50% of that calculated in B31.3 to ensure that there is no chance of brittle fracture in the welds on the first cool down to the sub-zero temperature.
So in short the answer is no.