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TOPIC: Reducing Fittings

12 years 2 months ago #7195

  • ndshinde
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While specifying reducers and reducing tees, sometimes we dont specify schedules for both the sizes. Bigger size schedule is normally specified even if small size has a different schedule.

What is the reason for that? Is there any limitation for that? How this schedule difference is taken care at fabrication stage?

Re: Reducing Fittings 12 years 2 months ago #4256

  • gpsvn
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While specifying reducers and reducing tees, sometimes we dont specify schedules for both the sizes. Bigger size schedule is normally specified even if small size has a different schedule.

What is the reason for that? Is there any limitation for that? How this schedule difference is taken care at fabrication stage?

Why don't you specify schedules ? If you don't, how could you get them purchased and used correctly ?

The schedules of the fittings match those of the pipes or connecting fittings, so the fabricator has no problem.

I am talking about a 12 years 2 months ago #4258

  • ndshinde
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I am talking about a common practise followed in many companies. They dont specify both the scedules. I am not clear what is the philosophy behind that. May be they are ensuring that thickness difference is within limits specified by B16.25

Not crystal clear yet. Does anybody know why?

I don't think that is 12 years 2 months ago #4259

  • gpsvn
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I don't think that is a common practise simply because it not right. One can not specify a reducing tee for reducer without specifying their schedules unless these are not butt weld fittings.

I am sure no one want to see a sch 160 pipe welded to a sch 40 fitting in a sch 160 system. And if that is wrong, then the "common practise" must be wrong.

I have seen it in 12 years 2 months ago #4261

  • ndshinde
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I have seen it in many specs. If we dont know the thing then we should not assume that its not there.

I think the specs already 12 years 2 months ago #4263

  • gpsvn
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I think the specs already specified the pipe schedules, and the specs assume that the piping engineers know his job well enough to specify the schedules of the fittings.
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