Dear Fletcher,

With the reference to feedback, As we know pipe of 72 inch and thickness 0.625 inch D/t Ratio (<100) is exceeding, However we have calculated the SIF as per ASME B31.3 and FEA tool as follows.

As per ASME B 31.3 the SIF Out-plane - 6.7 & SIF In-plane - 5.3

As per FEA the SIF Out-plane - 5.3 & SIF In-plane - 4.7

We checked again by inputting FEA analysis SIF values and found that the stresses are still failure at Tee Connection.

Kindly Experts suggest us to overcome this critical condition.

By
Rajivgandhi