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ASME BPE-2002 connections & fittings

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robinxie

robinxie

Chemical
Nov 13, 2001
52
I am doing a biochemical plant piping design. The ASME BPE-2002 should be complied with. Here is my question.
I need to install a flowmeter, and its connection is Threaded Female, NPS 1/2". But according to the ASME BPE-2002, all threaded connection is not recommended (refer to BPE-2002 Page11~Page12). How could I design this connection? Meanwhile, I want to have a easy "take-out" design for this flowmeter. I do not think I can use a union. How should I do?
Many thanks ahead.

Robin
 
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You should never use a screwed component in a hygienic piping system.

If the system is a process or process support system, i.e. containing product or fluids which may later be mixed with product. (the wording may not be 100% correct, but as as categorised by ISPE - then you should use a sterile bolted joint like Clamps, couplings or flanges from Tri-Clover, BBE-Systems and similar.

Most likely, the flowmeter itself is also not of hygienic type which it should have been - if it was, they would never supply it with threaded ends.

Unless the piping system is a utility system with no product contact at any time, no surface requirements etc. then you may get along fabricating a transition fitting, but normally these systems are not specified to ASME BPE.

You should really check where this flowmeter is going to be installed.

regards
Mogens
 
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