Specification Long Radius Pipe bends - Radius = 9D
Specification Long Radius Pipe bends - Radius = 9D
(OP)
Hi,
We have requested the vendor to provide 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG. 9D pipe bends.
But vendor has provided 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG.686 mm radius pipe bends.
Can you please explain difference between 9D (as per specification) and 686 mm radius (as provided by vendor) ?
Thanks in advance.
We have requested the vendor to provide 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG. 9D pipe bends.
But vendor has provided 3 INCHES, SCHEDULE 80S ASTM A 312, TP 304H, SMLS, 90 DEG.686 mm radius pipe bends.
Can you please explain difference between 9D (as per specification) and 686 mm radius (as provided by vendor) ?
Thanks in advance.
RE: Specification Long Radius Pipe bends - Radius = 9D
So as you specified a 3 inch diameter pipe, the radius of the bend would be 27 inches or 685.8mm
RE: Specification Long Radius Pipe bends - Radius = 9D
Also, is't a 3" SCH80 pipe outside diameter 88.9 mm (3 1/2"), thus making a 9D bend: r = 800 mm ?
RE: Specification Long Radius Pipe bends - Radius = 9D
RE: Specification Long Radius Pipe bends - Radius = 9D
Pipe bends are classified according to the centerline radius (CLR) of the bend as a ratio to the nominal pipe diameter.
For example, 4″ N.P.S. pipe which is bent on a 6″ CLR is classified as a 1½D Bend (1½ times the nominal pipe diameter).
When bent on a 12″ CLR, the bend is classified as 3D.
http://apexpiping.com/technical/
However a bit of research does suggest that some people use the outside diameter ?
RE: Specification Long Radius Pipe bends - Radius = 9D
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P.E. Metallurgy
RE: Specification Long Radius Pipe bends - Radius = 9D