Home » Buttwelding Fittings » ASTM A234 WPB BUTT WELDING PIPE FITTING 90 DEGREE LR ELBOW ASME B 16.9 MSS SP43

ASTM A234 WPB BUTT WELDING PIPE FITTING 90 DEGREE LR ELBOW ASME B 16.9 MSS SP43

What is a 90 DEGREE LR ELBOW and what about its specification and advantages.

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What is LR 90 elbow?

Long Radius 90° Elbows make a 90 degree change of direction in the run of the pipe. The radius of the bend in this elbow is “long radius”, or in other words, greater than that of the nominal size.A 90° elbow long tangent is a long radius (LR) with the centerline curvature equal to 1-1/2 times the nominal pipe size (NPS) and a straight extension at both ends (long tangent) for 2 inch and larger sizes. Tangent elbows provide a straight length at the end to accept a Slip-on Flange.

 

Cerification of LR 90 elbow

Size Range 1/2″-80″/DN15-DN2000
Thickness Schedule SCH10-SCH160,XSX
China Standard GB/T12459,GB/T13401,HG/T21635/21631,SH348/3409
America Standard ANSI/ASME B 16.9/MSS SP43
Europe Standard EN10253
Carbon Steel Q235,20#,35#,45#,20G,ASTM A234 WPB/WPC
Low Tem Carbon Steel Q345B,16Mn,ASTM A420 WPL6
Pipeline Steel ASTM A860 WPHY 42/46/46/60/65
Alloy Steel ASTM A234 WP11/WP12/WP5/WP9/WP91/WP92,15CrMoG
Stinless Steel ASTM A403 WP304/304L/304H,316,316L,310S,317,347,904L

 

Advantagaes of Butt welding elbows

Butt weld elbow is a steel elbow formed by hot pressing or forging. Its connection form is to directly weld the elbow and steel pipe. Butt welded elbows are mainly used for elbow with higher pressure and temperature than other connection types (socket welded elbow or threaded pipe elbow)

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