hydro pressure test of seat

[StevenFang]

I have a question.
We ordered a Globe Valve 10" 2500# with gear operator, manufacture applied the hydro pressure test of seat with 19Mpa.
Shouldn't the pressure test be applied with 47Mpa according to ASME B16.34?
Thank you!

 

[gerhardl]

StevenFang

You are correct that a 2.500 lbsvalve seat-tested according to ASME B16.34 should have a seat-test at 1.1 valve rating, and hence 47 megapascal.

But does the order exactly specify the seat test done and the test required? There could be a misinterpretation or divergence between the suppliers description of normal standard (normally included) delivery specifications and the exact wording of your order.

 

[al1979]

gerhardl is right.

Please check your valve data sheet (VDS). Is delta P mentioned = 19 MPa in VDS? Some manufacturers go by deplta P instead of 1.1 times of full rated working pressure unless otherwise specifically asked.

b.t.w. is valve as per BS 1873 or a control valve?

Regards!!!