Page 52 - Sharpe_2021 Catalog FlipBook

RESOURCES
Chart of popular pipe sizes & schedules
This chart shows the most commonly used pipe sizes and schedules along with their “true” O.D. measurements and wall thicknesses for each type of schedule. You can also see in the chart how the schedule varies among the pipe sizes.
A pipe that has an O.D. measuring 1.66 inches and a schedule measuring 0.140 inches is “named”, or called out as, “1-1/4 inch schedule 40 pipe”.
In summary, a tube is named according to its outside diameter. Tube gauge refers to the wall thickness
of the tube and the gauge measurement will be consistent from tube size to tube size. A pipe is called out by wall thickness, or schedule and this measurement can vary from pipe size to pipe size. Finally, the pipe O.D. remains the same regardless of the schedule of a particular pipe size.
**4-1/2 inch pipe is only available in Sch 40 and Sch 80.
GLOSSARY
Below are some of the most commonly used technical terms and their definitions.
ALLOY
Metals combined with other substances to make them stronger, harder, lighter or better in some other way.
BEND DIE
A wheel-shaped die with a groove in the outer circumference that conforms to half the pipe circumference. It will most often have a straight section used as half of the clamp set for holding the pipe against the die. This type of die is used in rotary draw or compression bending to generate the bend radius.
CENTERLINE DIAMETER (C.L.D.)
The distance from the centerline axis of the tube or pipe across to the other centerline of a 180-degree return bend. Multiply the C.L.R. x 2 for the centerline diameter (C.L.R. x 2 = C.L.D.).
CENTERLINE RADIUS (C.L.R.)
Radius along the centerline of the pipe or tube to be bent. As a general rule, the tightest achievable center line radius is one times the pipe or tube diameter.
DEGREE OF BEND
The angle, expressed in number of degrees, to which the bend is formed (e.g., 45 degrees, 90 degrees, 180 degrees). Also called DOB.
DRAWINGS
Digital specification drawings are used to illustrate the dimensions of the part. They should also include material type, center line radius, coping or other features needed.
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