Page 234 - Buried Pipe Design

208 Chapter Four

A review of AWWA C900 and AWWA C905 for PVC water pipe indi-
cates approval of the following:

Compounds 12544A or 12544B (formerly 1120)
Size range 4 through 12 in (AWWA C900); 14 through 36 in
(AWWA C905)
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Pressure classes 165, 235, and 305 lb/in (AWWA C900); 100, 125, 160,
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165, 200, and 235 lb/in (AWWA C905)
DR 25, 18, and 14 (AWWA C900); 41, 32.5, 26, 21, and 18
(AWWA C905)
AWWA C909 is the standard for molecularly oriented polyvinyl chlo-
ride (PVCO) pressure pipe, 4 through 12 in (100 through 300 mm), for
water distribution.
In 1980, AWWA published a manual, AWWA M23. This manual was
a follow-up on the standard AWWA C900 and covers the design and
installation of PVC pipe meeting this standard. The second edition of
this manual was published in 2002. It provides a very thorough pre-
sentation on the design and installation of PVC pipes. In 1994, AWWA
published AWWA C605, a standard for underground installation of
PVC pressure pipe and fittings. This contains some information found
in AWWA M23.
AWWA C901 is the AWWA standard for polyethylene pressure pipe,
tubing, and fittings, through 3 in for water. This standard is pri-
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marily for PE water service piping. AWWA C901 can be summarized as
follows:
Compounds 2306, 2406, 3406, 3408
Size range 1 -through 3-in
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Diameters ID base, OD base, tubing
Pressure classes 80, 100, 125, 150, 160, and 200 lb/in 2
DR 17.0, 15.0, 13.5, 11.5, 11.0, 9.3, 9.0, 7.3, 7.0, and 5.3
Note that AWWA C901 provides for a wide selection of compounds and
pressure classes. The safety factor is 2, and there is no routine test for
each piece of pipe.
AWWA C902 is the AWWA standard for polybutylene (PB) pressure
pipe, tubing, and fittings, - through 3-in for water. This standard is
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also primarily intended for service water piping. AWWA C902 can be
summarized as follows:
Compounds Type II, grade 1, class B; Type II, grade 1, class C;
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HDB 2000 lb/in ; PB 2110
Size range 1 - through 3-in
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