Piping Working Pressure Allowable

Question

Piping Working Pressure Allowable

guest0821 (visitor)

(OP)

14 Jun 01 22:17

I need to install a compressed air high pressure piping system.
Our client wants to use a steel pipe,
The working pressure shall be 3,000-psi in one piping system and 6,000-psi in the second system.
The pipe diameters are 1-1/4" and below

I am wondering if the ASTM A106 seamless grade-B is enough.

Please let me know the spec for this piping.

Thanks a lot
Efren Hernandez

mwpeters (Civil/Environmental) · Answer 1 · 2001-06-19 13:47:40

The working pressure for 1-1/4" sch 40 pipe is 2362 psi with no corrosion allowance. You could use sch 80 which will give you a orking pressure of 3282 psi. You can get this info from the "PRESSURE VESSEL HANDBOOK" by Eugene F Megyesy... A very handy book if you do this very often.

BREEN (Mechanical) · Answer 2 · 2001-06-21 13:58:47

Hi Efrin,

I suggest that you look at ASME/ANSI B31.3 Process Piping Code, which has a section on high pressure piping (above class 2500). There are some Code limitations on fabrication methods used in high pressure piping that you need to be aware of.

Be careful about socket weld fittings. Make VERY good fillet welds if socket weld fittings are used.

Best regards, John.

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Piping Working Pressure Allowable