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B 16.9 Proof Test on forged fittings

B 16.9 Proof Test on forged fittings

B 16.9 Proof Test on forged fittings

(OP)
Ref.  B 16.9

9.4 Applicability of Test Results
It is not necessary to conduct an individual test of fittings with all combinations of sizes, wall thicknesses and materials. A successful proof test on one representative fitting may represent others to the extent described herein.
 
9.4.1 Size Range.
One test fitting may be used to qualify similarly proportioned fittings with an NPS range from one-half to twice that for the tested fitting. The test of a non-reducing fitting qualifies reducing fittings of the same pattern. The test of a reducing fitting qualifies reductions to smaller sizes.

Questions
1. Proof test on a Concentric Reducer 6”x4” sch.80, which sizes of concentric reducers qualifies?
 
2. Proof test on Equal Tee 10”x10”,  qualifies Reduction Tees e.g. 10”x4”, or Equal Tees only?

Mauro

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