TYPES:                 ELBOW,TEE,CROSS,SOCKET,UNION, CAP,REDUCER,NIPPLE, PLUG, BUSHING

STANDARDS:    BRITISH STANDARD, AMERCICAN STANDARD, DIN STANDARD

SIZES:                1/4"  to 6"

British Standard: 
Materials: ISO 5922 
Dimensions: ISO 49 
Threads: ISO 7/1

American standard: 
Materials: ANSI/ASME A197-79 
Dimensions: ANSI/ASME B16.3-85 
Threads: ANSI/ASME B1.20.1