ASME B16.9:2003 pdf free download

ASME B16.9:2003 pdf free download
ASME B16.9:2003 pdf free download.FACTORY-MADE WROUGHT BUllWELDING FITTINGS
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 representa- tive fitting may represent others to the extent described in paras. 9.4.1, 9.4.2, and 9.4.3.
9.4.1 Size Range.
One test fitting may be used to qualify similarly proportioned fittings with a size range from one-half to twice that for the tested fitting. The test of a nonreducing fitting qualifies reducing fittings of the same pattern. The test of a reducing fitting qualifies reductions to smaller sizes.
9.4.2 Thickness Range.
One test fitting may be used to qualify similarly proportioned fittings with t /D ranges from one-half to three times that for the tested fitting. 9.4.3 Material Grades. The pressure retaining capac- ity of a geometrically identical fitting made of various grades of steel will be directly proportional to the tensile properties of the various grades; see para 2.1. Therefore, it is necessary to test only a single material grade in a representative fitting to prove the design of the fitting.
10 PRODUCTION TESTS
Hydrostatic testing of wrought fittings is not required by this Standard. All fittings shall be capable of with- standing, without leakage or impairment of serviceabil- ity, a hydrostatic test pressure required by the applicable piping code for seamless pipe of material equivalent to the fitting material, and of the size and wall thickness the fitting marking identifies.
11 TOLERANCES
Tolerances for fittings are shown in Tables 2 and Il, and apply to the nominal dimensions given in Tables 3 through 12 and Tables I2 through Ill. Where given in the tables, the minimum and maximum dimensions are based on these tolerances. The listings with decimals do not imply precision measurement, such as use of vernier, micrometer, electronic readout equipment, etc.