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Maximum Hydro Test Pressure For a 9000 Sockolet

Maximum Hydro Test Pressure For a 9000 Sockolet

Maximum Hydro Test Pressure For a 9000 Sockolet

My question is what is the maximum hydro test pressure for a 9000 sockolet on 2500 ansi piping spools. I attached the piping specs.
the client wants us to hydro test at the maximum test pressure for 2500 ansi flanges witch would be 9275 PSI will this over pressure these 9000 sockolets??

RE: Maximum Hydro Test Pressure For a 9000 Sockolet

Section 2.2 and table 7 of ASME B 16.11 tells you the hydrostatic test of a SW fitting is equivalent to what an XXS pipe will stand for class 9000 SW fittings. You can work this out and see if the class 9000 fittings are over pressured or not. I strongly suspect not.

BTW there is no such thing as a "2500 ANSI spool".

The flanges are class 2500 to ASME B 16.5

There is no excuse for not getting this right.

Personally I wouldn't like using SW fittings for this sort of pressure. But maybe that's just me.

The flanges are only one part of the design. You should be testing the piping spools according to the piping design code and checking to ensure you're not exceeding any element.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Maximum Hydro Test Pressure For a 9000 Sockolet

No, no, no. A "9000 lb sockolet" is (merely) a "label" or classification for a group of fittings of specific sizes and diameters than CAN BE used in pressurized systems. The group label specifies the outside diameter, material, ID, geometry, and heat treatment and alloys, etc. It does NOT set or allow the maximum or allowed pressure for the installation since the sockolets are intended to be welded to the outside of a any of a whole slew of pipes and pressure vessels of different diameters and thicknesses and pressure ratings at various temperatures.

Yes, in the 1800's, a "150 lb" pipe fitting was intended for use in a 150 psig saturated steam system. That does not mean a 9000 pound fitting is rated for a 9000 psig system (or even a 1500 psig or 300 psig system!) in today's world.

RE: Maximum Hydro Test Pressure For a 9000 Sockolet


I'd missed that.

True - the pressure rating of the fitting ITSELF is quoted as being the same as the same size and material of seamless pipe with wall thickness XXS for class 9000 according to what ever design code you're using (section 2.1.1 & table 7 ASME B 16.11).

At the smaller sizes it is probably more than 9000 psi....

And it's CLASS 9000, not 9000 lb.... (that's to the OP, not you)

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Maximum Hydro Test Pressure For a 9000 Sockolet

You need to check with ASME B 16.11. Rough calculation shows the test pressure of 9000 class fittings may be lower than 9275 psi.

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