Ductile Iron Pipe Classes

AVAILABLE PIPE CLASSES

Size (Nominal)		Outside Diameter		Pressure & Special Class		Nominal Wall Thickness		Pressure Rating
in	mm	in	mm	PC	SC	in	mm	p.s.i.	kPa
4	100	4.80	121.9	350	- 52 54*	.25 .29 .35	6.4 7.4 8.9	350 350 350	2410 2410 2410
6	150	6.90	175.3	350	50 52 54*	.25 .31 .37	6.4 7.9 9.4	350 350 350	2410 2410 2410
8	200	9.05	229.9	350	- 50 52 54*	.25 .27 .33 .39	6.4 6.9 8.4 9.9	350 350 350 350	2410 2410 2410 2410
10	250	11.10	281.9	350	- 50 52 54*	.26 .29 .35 .41	6.6 7.4 8.9 10.4	350 350 350 350	2410 2410 2410 2410
12	300	13.20	335.3	350	- 50 52 54*	.28 .31 .37 .43	7.1 7.9 9.4 10.9	350 350 350 350	2410 2410 2410 2410
14	350	15.30	388.6	250 300 350	- - - 50 52 54*	.28 .30 .31 .33 .39 .45	7.1 7.6 7.9 8.4 9.9 11.4	250 300 350 350 350 350	1720 2070 2410 2410 2410 2410
16	400	17.40	442.0	250 300 350	- - 50 52 54*	.30 .32 .34 .40 .46	7.6 8.1 8.6 10.2 11.7	250 300 350 350 350	1720 2070 2410 2410 2410
18	450	19.50	495.3	250 300 350	- - 50 - 52 54*	.31 .34 .35 .36 .41 .47	7.9 8.6 8.9 9.1 10.4 11.9	250 300 350 350 350 350	1720 2070 2410 2410 2410 2410
20	500	21.60	548.6	250 300 350	- 50 - 52 55*	.33 .36 .38 .42 .51	8.4 9.1 9.7 10.7 12.7	250 300 350 350 350	1720 2070 2410 2410 2410
24	600	25.80	655.3	200 250 300 350	- - 50 - - 52 56*	.33 .37 .38 .40 .43 .44 .56	8.4 9.4 9.7 10.2 10.9 11.2 14.2	200 250 250 300 350 350 350	1380 1720 1720 2070 2410 2410 2410
30	750	32.00	812.8	150 200 250 300 350	- - 50 - - 52 -	.34 .38 .39 .42 .45 .47 .49	8.6 9.7 9.9 10.7 11.4 11.9 12.4	150 200 200 250 300 300 350	1030 1380 1380 1720 2070 2070 2410
36	900	38.30	972.8	150 200 250 300 350	- - 50 - - 52 -	.38 .42 .43 .47 .51 .53 .56	9.7 10.7 10.9 11.9 13.0 13.5 14.2	150 200 200 250 300 300 350	1030 1380 1380 1720 2070 2070 2410
• Pressure ratings shown have an additional 100 p.s.i. (690 kPa) surge allowance. • Dimensions are subject to manufacturing tolerance. • * - Recommended classes for grooving. • Contact Canada Pipe for availability of other Special Classes and larger sizes.

SELECT FOR WORKING PRESSURE

The most commonly used classes of Ductile Iron Pipe and their rated working pressures are shown in the adjacent table. All ratings have an additional 100 psi (690 kPa) allowance for surge. A safety factor of 2:1 is then applied to the working pressure and surge allowance.

SELECT FOR DEPTH OF COVER

The most commonly used classes of Ductile Iron Pipe for underground installation and their maximum depth of cover are shown in the preceding table. The table is based on single H-20 truckload with a 1.5 impact factor. All classes of Ductile Iron Pipe shown are capable of withstanding loads created under a minimum of 1 ft. (.3 m) of cover, providing a Type 5 laying condition is used. For information on other laying conditions and depths of cover, please contact Canada Pipe.