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piping design acording to ASME 31.3 CODE

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Question:

rooya

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Karma Points: 348

Date Posted: 7/19/2008 10:56:13 AM Status: Live

Asker's Rating: None Provided Moderator's Rating: Helpful

Response:

P=28bar=28*10^5 bar
m=50 ton/hr =50*10^3/3600 Kg/s =13.888 Kg/s

but m=AV/v ------------(1)

where A=πd^2/4

V=velocity of flow

v=specific volume

From steam tables at P=28bar at saturated conditions

v=0.071396 m^3/Kg

from 1

m=(πd^2/4*V)/0.071396

13.888=(πd^2/4*V)/0.071396

d^2=1.263/V (d=internal diameter of pipe) -----(2)

we know that

σ(Hoops stress)= Pd/2t --------------------(3)

σ= depends on the pipe material

u can find a relation between diameter and thickness of the pipe in the code book( i dont have the code)

now from equations 2 &3 u can get d provided V is known.

i think formulae would help u

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