ASME B16.11:2016 pdf free download – Forged Fittings,Socket-Welding and Threaded
1.1 Scope
This Standard covers ratings, dimensions, tolerances,marking and material requirements for forged fittings.both socket-welding and threaded, as illustrated inTables 1 through 6 and Tables l-1 through l-6, inclusive.1.1.1 Fitting Types/Configuration.Types of fittingscovered by this Standard are shown in Table 7, by class and size range.Fittings shown in Tables 1through 6 and Tables l-1 through l-6 may also be made with combinations of socket-welding and threadedends.
1.1.2 Special Fittings. Fittings with special dimen-sions,threads, or counterbores may be made by agree-ment between the manufacturer and purchaser. Whensuch fittings meet all other stipulations of this Standard, they shall be considered in compliance there-with, provided they are appropriately marked (see section4).
1.1.3 Welding. lnstallation welding requirements arenot within the scope of this Standard.Installation welding shall be in accordance with the applicablepiping Code or regulation covering the piping systeminto which the fittings are installed.
1.2 General
1.2.1 Referenced Standards. Standards and specifica-tions adopted by reference in this Standard are shown inMandatory Appendix l1. It is not considered practical toidentify the specific edition of each standard and specifi-cation in the individual references.Instead, the specificedition reference is identified in Mandatory AppendixI1.A fitting made in conformance and conforming tothis Standard, in all other respects, will be consideredto be in conformance to the Standard, even though theedition reference may be changed in a subsequent revisionof the Standard.
1.2.2 Codes and Regulations.A fitting used under thejurisdiction of the ASME Boiler and Pressure Vessel Code,the ASME Code for Pressure Piping. or a governmentalregulation is subject to any limitation of that code or regu-lation.This includes any maximum temperature limita-tion, rule governing the use of a material at low temperature, or provisions for operation at a pressureexceeding the ratings in this Standard.
2.1 General
Fittings under this Standard shall be designated as Class2000,3000, and 6000 for threaded end fittings and Class 3000,6000, and 9000 for socket-weld end fittings.
2.1.1 Basis of Rating.The schedule of pipe corre-sponding to each Class designation of fitting for ratingpurposes is shown in Table 8. Design temperature andother service conditions shall be limited as provided by the applicable piping code or regulation for the materialof construction of the fitting. Within these limits, the minimum wall thickness for pipe to be used with aTable 8 Class designated fitting shall be computedbased on appropriate size straight seamless pipe of equivalent material as the fitting (as shown by comparisonof composition and mechanical properties in the respec-tive material specifications). The minimum pipe wallthickness calculation shall include pressure design andall applicable additional allowances (e.g., erosion, corro-sion,and thread depth for threaded pipe). The minimumwall thickness for selected pipe, considering manufac-turing minus wall thickness tolerance (typically 12.5%6), shall not be less than the minimum wall calcula-tion.The fitting is suitable for the application if the wallthickness of the selected pipe equals or is less than theASME B36.10M Schedule No. or Wall Designation pipewall thickness correlated with the fitting in Table 8[see Note (1) in Table 8].