Malleable Iron Pipe FIttings Types: Elbow 45, Elbow 90, Elbow 180, Street Elbow, Cross, Tee, Cap, Bushing, Union, Nipples, Coupling, Plug, Hex. Bushing, Hex. Nipple, Square Plug and etc. American standard: Materials: ANSI/ASME A197-79 Dimensions: ANSI/ASME B16.3-85 Threads: ANSI/ASME B1.20.1 DIN Standard: Materials:DIN1692 Dimensions:EN 10242 DIN2950 Threads:ISO 7/1 DIN2999 British Standard: Materials: ISO 5922 BS 143 and BS1256 Dimensions: ISO 49, Threads: ISO 7/1