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Elbow

Pipe elbow fittings are critical piping components used to change the direction of flow within a piping system. They are typically available in 45° and 90° configurations and manufactured from materials such as carbon steel, stainless steel, and alloy steel in compliance with ASME B16.9 and applicable ASTM standards.

Name
Detail
Size
OD: 1/2" - 24" seamless, up to 72" welded
Thickness range: SCH 10, SCH 40, SCH 80, XS, XXS and SCH 160
30° 45° 60° 90° 180° and custom
LR/long radius=1.5D, SR/Short radius=1D, various radius: 3D, 5D, 6D, 7D, 9D
Standard:
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43
Materials
Carbon Steel ASTM A234 WPB, ASTM A234 WPC, MSS-SP-75 WPHY-42/46/52/56/60/65/70
Alloy Steel ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91 etc.
Stainless Steel ASTM A403, ASTM A312, WP304/304L/316/316L, etc.
End:
Butt weld, Socket Weld, Threaded / Screwed
Brand
VALCON (China), Benkan ( Japan / Thailand ) , TK ( Korea ) , Mega (Italy) , BKL (Japan / Thailand) , Erne ( Austria / Europe ) , ASK ( Japan / Thailand ), BW ( Taiwan ) , Tachen ( Taiwan) , Tectubi Raccordi (Italy ) , Kanzen ( Taiwan ) , Ulma ( Spain ) , JD ( Italy ) , TechnoForge ( Italy ), Viar ( Italy ) , Delcorte ( Italy )

Long Radius vs Short Radius

Elbows radius are split into two groups which define the distance over which they change direction; the center line of one end to the opposite face. This is known as the center to face distance and is equivalent to the radius through which the elbow is bent. The center to face distance for a long radius elbow, abbreviated LR always is 1.1/2 x Nominal Pipe Size (NPS) (1.1/2D), while the center to face distance for a short radius elbow, abbreviated SR even is to nominal pipe size.

Elbow connections:

  • Buttweld (BW) whose dimensions, dimensional tolerances et cetera are defined in the ASME B16.9 standards. Light-weight corrosion resistant fittings are made to MSS SP43.
  • Socket Weld (SW) Class 3000, 6000, 9000 are defined in the ASME B16.11 standards.
  • Threaded (THD), screwed elbow Class 2000, 3000, 6000 are defined in the ASME B16.11 standards.