Pipe Length Calculations

Offset Connections

INT Engineering Pipe Length Calculations

Angle	D Equals	R Equals	L Equals
Angle	D Equals	R Equals	Flg Pipe	FST Pipe
45°	A x 1.41	A x 1.00	D - (2 x E)	D - (2 x E) or D - (E + S)
22 1/2°	A x 2.61	A x 2.41	D - (2 x E)	D - (2 x E) or D - (E + S)
11 1/4°	A x 5.13	A x 5.03	D - (2 x E)	D - (2 x E) or D - (E + S)
5 5/8°	A x 10.20	A x 10.15	D - (2 x E)	D - (2 x E) or D - (E + S)

Notes:
Allowance in flange joint (usually 3mm for gasket) and in Fastite® Joint (usually 6mm) should be taken into account in determination of required pipe length. Likewise, extension of restrained joints subjected to thrust load in installation and/or service should be considered as well.

Inclined Diagonal Runs

Bend Degree Cot. CSC.

1/8 45° 1.0000 1.4142

1/16 22 1/2° 2.4142 2.6131

1/32 11 1/4° 5.0273 5.1258

1/64 5 5/8° 10.1532 10.2023

f = Approximate required bend angle

Sketch Explanatory of Formulas for Lengths of Pipe for Diagonal Runs and Angle of Fittings

       The following examples illustrate means of determining lengths of pipe and tie rods on inclined diagonal runs, and finding the approximate angle, f, required when the dimensions in three planes are known.

       A. When measurements in two planes are known and angle of fitting f decided upon, then



        Example: If A = 1m, B = 1.5m, f = 45°
Find C and length of pipe required
on 300mm line.

        B. When measurements in three planes are known, then



       Example: If A = 1m, B = 1.5m, C = 4.5m

       Find f and length of pipe required on 300mm line.

A one-sixteenth bend may be used.

       For center-to-socket dimensions of Fastite fittings, click here. For center-to-face dimensions of flange fittings, click here.

Allowance in flange joint (usually 3mm for gasket) and in Fastite Joint (usually 6mm) should be taken into account in determination of required pipe length. Likewise, extension of restrained joints subjected to axial thrust load in installation and/or service should be considered as well.