Hydro failure

[sudipto banerjee]

Hi All,

One LTCS ASME DIV 1 vessel failed in Hydrotest in the joint of 2"LWNRF with Body blind flange. Its a set on type welding.

Nozzle is of SA 350 Gr. LF2 CL1 (16.7 thk) and the body blind flange of SA 765 Gr II (117 thk).

The UT test of the joint shows satisfactory.

Can anyone tell what cud be the possible reasons pls.

Thanking You.

I remain.

Best Regards,
Sudipto Banerjee, BE (Mech.), C.Eng. (India), FIE

Mobile UAE: +971(0)503946212

Mobile India: +91 9987561673 (Whats app no.)

[Raghuram Bathula]

Dear Sudipto

what is the location of failure, weld, HAZ, BM (which side)? NDE may not detect minute linear flaws, you need run full failure investigation on samples at laboratory, 

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[sudipto banerjee]

Hi Raghu,

The crack is on the weld.

Thanking You.

I remain.

Best Regards,
Sudipto Banerjee, BE (Mech.), C.Eng. (India), FIE

Mobile UAE: +971(0)503946212

Mobile India: +91 9987561673 (Whats app no.)

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