SmallTiger
Mechanical
Could anyone tell me what is the meaning of ANSI 150lb or ANSI 300lb for a flange and how it's related to its working pressure?
Thanks a lot
Thanks a lot
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Ansi Standard
- Thread starter SmallTiger
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Tiger,
ANSI B16.5 is a dimensional standard that provides:
- Standard dimensions for various types and ratings of pipe flanges ( This data is required in order for manufacturers to produce interchangable items)
- Combinations of allowable pressures at various temperatures for various materials (This data allows piping system designers to specify a flange that is strong enough to sustain a pressure at a certain temperature)
The pressure "classes" should not be confused with the pressure/temperature tables...... for example a 300 lb. class flange, made from carbon steel (ASTM A105 material)to the dimensions contained in B16.5 is acceptable for service at 740 psig at 70 F but can be used only to 410 psig at 800 F
Hope that this helps....
MJC
ANSI B16.5 is a dimensional standard that provides:
- Standard dimensions for various types and ratings of pipe flanges ( This data is required in order for manufacturers to produce interchangable items)
- Combinations of allowable pressures at various temperatures for various materials (This data allows piping system designers to specify a flange that is strong enough to sustain a pressure at a certain temperature)
The pressure "classes" should not be confused with the pressure/temperature tables...... for example a 300 lb. class flange, made from carbon steel (ASTM A105 material)to the dimensions contained in B16.5 is acceptable for service at 740 psig at 70 F but can be used only to 410 psig at 800 F
Hope that this helps....
MJC
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