Joints & Dimensions

PUSH-ON JOINTS

All Canada Pipe Ductile Iron Pipe for underground installation is supplied with TYTON JOINT® or FASTITE ® joint bells. These joints were originally developed in 1956 and are designed to be bottle-tight and easily assembled. They have been tested to 1,000 psi internal pressure, 430 psi external pressure and to 14 psi negative air pressure with no leakage or infiltration. The standard gasket supplied is the Styrene Butadiene (SBR) gasket. Other gasket materials such as EPDM, Nitrile, Neoprene and VITON® are also available. Special locking style gaskets can be supplied to provide joint restraint on standard TYTON JOINT® pipe.

 

TYTON JOINT® Pipe
4"-24" 100mm-600mm		   FASTITE™ Joint Pipe
30"-36" 750mm-900mm

 

DUCTILE IRON PIPE JOINTS & DIMENSIONS
Size Outside
Diameter		 Inside
Diameter		 Bell
Diameter 'A'		 Bell
Depth 'B'		 Nominal
Laying
Length
in mm in mm in mm in mm in mm ft m
4 100 4.80 121.9 4.18 106.2 6.86 174.2 3.15 80.0 20 6.1
6 150 6.90 175.3 6.28 159.5 8.63 219.2 3.38 85.9 18 5.5
8 200 9.05 229.3 8.43 214.1 10.94 277.4 3.69 93.7 18 5.5
10 250 11.10 281.9 10.46 265.7 13.32 338.3 3.75 95.3 18 5.5
12 300 13.20 335.3 12.52 318.0 15.06 382.5 3.75 95.3 18 5.5
14 350 15.30 388.6 14.55 369.6 17.80 452.1 5.00 127.0 18 5.5
16 400 17.40 442.0 16.61 421.9 19.98 507.5 5.00 127.0 18 5.5
18 450 19.50 495.3 18.69 474.7 22.00 558.8 5.00 127.0 18 5.5
20 500 21.60 548.6 20.75 527.1 24.12 612.6 5.00 127.0 18 5.5
24 600 25.80 655.3 24.95 633.7 28.43 722.1 5.00 127.0 18 5.5
30 750 32.00 812.8 31.07 789.2 34.95 887.7 6.50 165.1 18 5.5
36 900 38.30 972.8 37.29 947.2 41.37 1050.8 6.50 165.1 18 5.5
• Inside diameters are based on minimum Pressure Classes available and include standard cement lining.
• Dimensions are subject to manufacturing tolerances.

 

PIPE TAPPING

The Ductile Iron Pipe Research Association (DIPRA) and the pipe manufacturers have conducted extensive testing of direct tapping Ductile Iron Pipe. Based on these tests, the maximum recommended direct tap sizes to ensure a watertight tap are shown below. The old rule of thumb of 3 or 4 threads was based on the much weaker pit-cast pipe. Because of the high strength of ductile iron, the number of threads engaged is less critical. NOTE: DIPRA also recommends the use of two layers of pipe thread sealant tape on all direct taps made on Ductile Iron Pipe to minimize the torque required to effect a watertight tap.

 

Pressure class Ductile Iron Pipe can be direct tapped within close proximity, unlike old cast iron pipe which required an 18" separation for main stops.

 

MAXIMUM RECOMMENDED DIRECT TAP SIZE
Size Pressure Class
in mm 150 200 250 300 350
4 100         3/4"
6 150         1"
8 200         1"
10 250         1"
12 300         1 1/4"
14 350     1 1/4" 1 1/2" 1 1/2"
16 400     1 1/2" 2" 2"
18 450     2" 2" 2"
20 500     2" 2" 2"
24 600   2" 2" 2" 2"