Carbon Steel & Alloy Steel Butt weld Pipe Fittings according to ASTM ANSI B16.9 as below: 1. Elbow 45Deg, 90Deg, L/R, S/R from 1/2 inch TO 52 inch 2. Tee Straight & Reducing from 1/2 inch TO 52 inch 3. Reducer Concentric & Eccentric from 1/2 inch TO 52 inch 4. Caps from 1/2 inch TO 52 inch Use: oil filed, offshore, gas pipeline, water system, electrical factory, building construction, ship building, chemical, etc.