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TOPIC: Reducing Fittings

Great entertainment. 3" x 2" 12 years 1 month ago #4353

  • gpsvn
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Great entertainment.

3" x 2" reducer may be defined as SCH XS only as i dont see any problem for welding of SCh XS 2" end of the reducer with SCH STD pipe. Refer to ASME B16.25 and you can get the answer.

I said i need to talk to some senior guy who has got good experience. Let me find one and i will post the answer.

No need to scratch head and waste time doing NVAs.


Have your senior guys with good experience worked out the answer yet ? Please share with me, the junior and inexperience.

The most plausible reason for 12 years 1 month ago #4354

  • 2ndMoment
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The most plausible reason for schedules and wall thickness of fittings being left off specifications is that specifying fittings is hardly ever done in isolation (unless your having to back order for bad materials control on site). The specifying of fittings is allied to the piping material specification as per individual line classes. So the material controllers implicitly know what the fitting wall thickness, is based on the mating pipe.

A quick browsing of any online catalogue for BW fittings according to B16.9 reveals that manufacturers and foundries offer SCH 10, 40 & 80 on small bore and 5, 10 & 40 on larger bores. For very large bores the bends would more than likely be fabricated according to B31 304 design - from the same schedule pipe as the prevailing pipe.

If anyone sees a flaw with this let me know.

In my projects, most of 12 years 1 month ago #4355

  • gpsvn
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In my projects, most of the system are rated 900# and 16"-20" sch 120 are common.
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