Butt Welding Elbows
Butt welding elbow is formed by hot pressing or forging of steel,it is connected with steel pipe by butt welding.It is used to change the fluid direction in pipeline systems.
Butt welding elbow can be divided into long radius(LR) butt welding elbow and short radius(SR) butt welding elbow according to its radius of curvature.The radius of curvature of the long radius butt welding elbow is equal to 1.5 times the outer diameter of the pipe,i.e. R=1.5D.The radius of curvature of the short radius butt welding elbow is equal to the outer diameter of the pipe, i.e. R=1D.The D is the diameter of butt welding elbow and R is the radius of curvature.If there is no special instructions,the general choice is 1.5D elbow.
According to the angle of the elbow,there are 45 degrees butt welding elbow,90 degrees butt welding elbow and 180 degrees butt welding elbow and other angles of elbows.
In terms of pressure levels,there are about 17 kinds of pipes,which are the same with the standard of American standard pipes: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s,XS,Sch80, Sch100, Sch120, Sch140, Sch160 and XXS.STD and XS are the most commonly used.
The materials for butt welding elbows can be carbon steel,stainless steel and alloy steel,as follows:
Carbon steel: ASTM/ASME A234 WPB,WPC
Stainless steel: ASTM A403 WP304,WP304L,WP304H,WP316,WP316L,WP321,WP321H,WP347,WP347H
Alloy steel: ASTM A234 WP1,WP5,WP9,WP11,WP12,WP22,WP91,WP911,15Mo3 15CrMoV,35CrMoV
Low-temperature steel: ASTM A402 WPL3,WPL6
High-temperature steel: ASTM A860 WPHY 42,WPHY46,WPHY52,WPHY60,WPHY65,WPHY70
We produce butt welding elbows in different standards,as follows:
ANSI/ASME B16.9–Factory made wrought steel butt welding fittings,inculdes elbows,tees,reducers,caps dimensions.
ANSI/ASME B16.28–Wrought steel butt weld;short radius elbows and return
DIN EN standard:
DIN EN 10253–Butt welding pipe fittings,elbows,return bends,concentric and eccentric reducers,equal and reducing tees,and caps
GOST 17375–Carbon and low-alloy steel butt-welding fittings,elbow
JIS B2311–Steel butt welding pipe fittings for ordinary use.
JIS B2312–Steel butt welding pipe fittings
JIS B2313–Steel plate butt welding pipe fittings
KS B1522–Steel butt welding pipe fittings for ordinary use and Fuel Gas.
KS B1541–Steel butt welding pipe fittings.
KS B1543–Steel plate butt welding pipe fittings.
MSS SP-43–Wrought stainless steel butt welding fittings.
MSS SP-75–Specification for high test wrought butt welding fittings.
Haihao Group specializes in the production of butt welding elbows,including long radius and short radius elbows,45 degree/90 degree/180 degree elbow,we can produce elbow according to standard or customer’s requirement.We also can manufacture other pipeline products,like seamless steel pipes,welded steel pipes(ERW,LSAW,SSAW pipe),forged flanges,butt welding pipe fittings and forged pipe fittings,etc.If you want to know more about our products,please email us:firstname.lastname@example.org