Pressure rating of fittings such as elbows
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When selecting materials for piping, I noticed that in our grade table, for pipes with a grade of 300lb, the pressure rating of fittings such as small elbow fittings is 3000lb. Could an expert please explain this?
For pipe fittings such as elbows with a nominal diameter of 40 or less, socket weld pipe fittings are generally used. The pressure ratings for these socket weld pipe fittings are 3000lb and 6000lb, as specified in standard HG/T 21634-1988.
Agree with the view above; the pressure ratings for socket weld connections are 3000# and 6000#.
That’s not the pressure rating in pounds! The grades for socket weld and threaded fittings are 3000 and 6000; it’s not the pounds you mentioned
The grades for socket weld and threaded fittings are 3000 and 6000; you can refer to ASME B16.11, where there is a clear correspondence between grades 3000 and 6000 and the SCH wall thickness values