It is a pipe fitting which you can used to change the flow direction in a 90 degree.It is also called “90 bend” or “quarter bend”. As a joint between two pipes,it's also used as a railing ends or corners on a level installation.
For the butt welding steel elbow,it is made from a piece of seamless pipe commonly.Bending the two ends of pipe to a angle of 90 degree,it is a 90 degree seamless elbow.There also some 90 degree elbows are made from the ERW pipes or the steel plates,then they are welded elbow.They are manufactured as SR (Short Radius) elbows and LR (Long Radius) elbows or other radius elbows .
Standard: ASME/ANSI B16.28,B16.9, MSS-SP-75, DIN 2605, EN 10253-2 , JIS B2311,GOST 17375,ISO3419
Material: ASTM A234,ASTM A860, ASTM 403,DIN 17175, EN10228 …Carbon steel, stainless steel , alloy steel.
Size: 1/2″-96″. DN15-DN2400
Connect method: Butt welding