Arc – The curved portion of tube bends or pipe bends.
Bevel – A type of end preparation of tube bends or pipe bends.
Centerline Radius (CLR) – Distance in inches from the center of curvature to the centerline axis of the tube rolling or pipe rolling bends. Often abbreviated as CLR.
Cold Tube Bending – The bending of pipe or tube to shapes by cold working methods.
Degree – Angle in degrees to which the pipe bends or tube bends are formed (i.e. 45 degrees, 90 degrees, 180 degrees, etc.)
Easy Way (EZ) – Bending of a rectangular tube with its short side in the plane of the tube bend.
Grade – Manufacturers’ specification of material type of pipe or tube, (i.e. A53B, T304W SS).
Hard Way (HW) – Bending of a rectangular tube with its long side in the plane of the tube bend.
I.D. – Inside diameter of the tube or pipe.
Minimum Tangent – The minimum straight on the end of pipe bends required by the bending machine to form the bend.
Neutral Axis – That portion of the pipe bend or tube bend that is neither in compression or tension.
O.D. – Outside diameter in inches of the tube or pipe.
Out of Plane – The deviation of the horizontal plane of a single pipe bend between its tangent points, based on the theoretical center-line of the pipe rolling bend.
Ovality – The distortion or flattening of pipe or tube from its normal, round shape caused by the pipe bending process.
Plain End – Square cuts made prior to pipe bending with no intended exact tangent length.
Roll Past – Small amount of arc bent beyond a specified degree.
Rough Cut – Ends cut with an acetylene torch or arc gauge, ends are not required to be straight.
Square Cut – Cuts made square to the tangent of pipe bends or tube bends after the pipe bending process.
Tangent – The straight portion of material on either side of arc of rolling bends.
Tangent Point – The point at which the pipe bend or tube bend starts or ends.
Taper Bore – Material milled or ground out of the inside diameter tangent end of pipe rolling bends to create a different wall than the original thickness.
Wall – The thickness in inches of tubular pipe material.
Wrinkles – Waving or corrugation of pipe bends or tube bends in the inner radius.