Dimensional Standards for Piping Engineering

Sr.	Details	Standard
1	Pipe Threads, General Purpose (Inch)	B1.20.1
2	Dryseal Pipe Threads (Inch)	B1.20.3
3	Cast Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250	B16.1
4	Malleable Iron Threaded Fittings: Classes 150 and 300	B16.3
5	Gray Iron Threaded Fittings: Classes 125 and 250	B16.4
6	Pipe Flanges and Flanged Fittings NPS 1/2 Through NPS 24 Metric/Inch Standard	B16.5
7	Factory-Made Wrought Buttwelding Fittings	B16.9
8	Face-to-Face and End-to-End Dimensions of Valves	B16.10
9	Forged Fittings, Socket-Welding and Threaded	B16.11
10	Cast Iron Threaded Drainage Fittings	B16.12
11	Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads	B16.14
12	Metallic Gaskets for Pipe Flanges: Ring-Joint, Spiral-Wound, and Jacketed	B16.20
13	Nonmetallic Flat Gaskets for Pipe Flanges	B16.21
14	Buttwelding Ends	B16.25
15	Wrought Steel Buttwelding Short Radius Elbows and Returns	B16.28
16	Valves — Flanged, Threaded, and Welding End	B16.34
17	Orifice Flanges	B16.36
18	Large Metallic Valves for Gas Distribution (Manually Operated, NPS 21/2 to 12, 125 psig Maximum)	B16.38
19	Malleable Iron Threaded Pipe Unions	B16.39
20	Ductile Iron Pipe Flanges and Flanged Fittings, Classes 150 and 300	B16.42
21	Large Diameter Steel Flanges (NPS 26 Through NPS 60)	B16.47
22	Steel Line Blanks	B16.48
23	Welded and Seamless Wrought Steel Pipe	B36.10
24	Stainless Steel Pipe	B36.19
25	Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation	MSS-SP-58
26	Socket Welding Reducer Inserts	MSS-SP-79
27	Class 300 Steel Pipe Unions, Socket Welding and Threaded	MSS-SP-83
28	Swage(d) Nipples and Bull Plugs	MSS-SP-95
29	Integrally Reinforced Forged Branch Outlet Fittings – Socket Welding, Threaded and Buttwelding Ends	MSS-SP-97