ASME B16.11-2016
PRESSURE RATINGS
Fittings under this Standard shall be designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings.
Table 1 Socket-Welding Elbows, Tees, and Crosses(Datasheet)
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