ASME B16.11-2011 pdf – Forged Fittings,Socket-Welding and Threaded.
1.2.3 Service Conditions. Criteria for selection of fitting types and materials suitable for particular fluid service are not within the scope of this Standard.
1.2.4 Quality Systems. Nonmandatory requirements relating to the product manufacturer’s quality system program arc described in Nonmandatory Appendix A.
1.2.5 Relevant Units. This Standard states values in both SI (Metric) and US. Customary units. these systems of units are to be regarded separately as standard. Within the test, the U.S. Customary units are shown in parentheses or in separate tables that appear in Mandatory Appendix I. The values stated in each system are not exact equivalents; therefore, it is required that each system be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard.
Tables I through 5 show fittings dimensional requirements in millimeters. Tables I-I through l- show the dimensional requirements for inch dimensioned fittings.
2.1 General
Fittings under this Standard shall be designated as Class 2000, 3000, and (000 for threaded end fittings and Cbs.s 3000, )00, and 9000 for socket-weld end fittings.
2.1.1 Basis of Rating. The schedule of pipe corresponding to each Class designation of fitting for rating purposes is shown in Table 7. Design temperature and other sc ice conditions shall be limited as pruvided by the applicable piping code or regulation for the material of construction of the fitting. Within these limits, the minimum wall thickness for pipe to be used with a Table? Class designated fitting shall be computed based on appropriate size straight seamless pipe of equivalent material as the fitting (as shown by comparison of composition and mechanical properties in the respective material specifications) The minimum pipe wall thickness calculation shall include pressure design and all applicable additional allowances (e.g.. emsion. corrosion, and thread depth for threaded pipe). The minimum wall thickness for selected pipe, considering manufacturing minus wall thickness tolerance (typically 125%), shall not be less than the minimum ivall calcuLation The fitting is suitable for the application if the wall thickness of the selected pipe equals or is less than the ASME 83o IOM Schedule No. or i%ill Designation pipe wall thickness correlated with the filling in Table 7 Isce Note (1) in Table 7J.
2.1.2 Nonstandard Pipe Wall Thickness. Since ASMIE l33t. IOM does not include Schedule ISO nor Double Extra Stmng thickness for NI’S , and 3 the values in Table S shall be used as the nominal wall thicknesses of the pipe for rating purposes.
2.1.3 Combination End Fittings. The Class designation for fittings made with combinations of socket- welding and threaded ends shall be based on the end configuration that has the lowest rating from Table 7.
2.2 Pressure Test Capability
Pressure testing is not required by this Standard, but the fittings shall be capable of withstanding a hydrostatic test pressure required by the applicable piping code for seamless pipe of material equivalent to the fitting forging and of the schedule or wall thickness correlated with the fitting Class and end connection of Table 7.
3.1 General
NPS, followed by a dimensionless number, is the designation for nominal filling size. NI’S is related to the reference nominal diameter, DN, used in international standards. The relationship Is typically as follows:
4.1.2 OmissIon of Markings. Where size and shape of fittings do not permit all of the above markings, they may be omitted in the reverse order given above,
5.1 Standard Materials
Fittings shall be made of materials consisting of forgings. bar, seamless pipe. or seamless tubular products. These materials shall conform to the requirements for the WI’ seamless construction materials of ASTM Fitting Specifications A234, 4103, A420, A8l5,or 8366 or ASTM Forging Specifications A 105, A 182, A350, 8462, or 8364. Tees, elbows, and cnseses shall not be made from bar stock.
6.1 General
ljnlt-. otliern oc noted, tite Li InbvnsK.fl,. n’ ithtjut toict— ances for socket-welding fittings given in Tables I and 14 and the dimensions without tolerances for threaded fittings given in Tables 2 through 5 and Tables 1-2 through 1-5 are nominal values and subject to the designated manufacturing tolerances.
6.2 Socket Fittings
6.2.1 Body Wall Thickness. The body wall thickness of socket-welding fittings shall be equal to or greater than the values, C, shown in Tables I and I-I.
6.2.2 Socket Watt Thickness. The socket wall average thickness and minimum thickness shall not be less than the corresponding values, C, shown in Tables I and I-I.