NOTE: Use Thickness Class 52 for LANTNAVFACENGCOM
projects.
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Ductile-iron pipe shall conform to AWWA C151, Thickness Class [_____].
[Flanged pipe shall conform to AWWA C115.] Fittings shall conform to AWWA
C110 or AWWA C153. [Fittings with push-on joint ends shall conform to the
same requirements as fittings with mechanical-joint ends, except that the
bell design shall be modified, as approved, for push-on joint.] Fittings
shall have pressure rating at least equivalent to that of the pipe. Ends
of pipe and fittings shall be suitable for the joints specified
hereinafter. Pipe and fittings shall have cement-mortar lining conforming
to AWWA C104, standard thickness.
2.1.6.2
Ductile Iron Pressure Joints and Jointing Materials
a.
Joints, general: Joints for pipe and fittings shall be [push-on
joints] [or] [mechanical joints] except as otherwise specified in
this paragraph. [Joints shall be mechanical-joints where
indicated.] [Joints shall be flanged joints where indicated.]
[Joints made with sleeve-type mechanical coupling may be used in
lieu of push-on joint.] [[Grooved] [or] [shouldered] type joints
may be used in lieu of push-on joint [or flanged joint], except
where joint is buried.]
b.
Push-on joints: Shape of pipe ends and fitting ends, gaskets, and
lubricant for joint assembly shall conform to AWWA C111.
c.
Mechanical joints: Dimensional and material requirements for pipe
ends, glands, bolts and nuts, and gaskets shall conform to AWWA
C111.
d.
Flanged joints: Bolts, nuts, and gaskets for flanged connections
shall be as recommended in the Appendix to AWWA C115. Flange for
setscrewed flanges shall be of ductile iron, ASTM A 536, Grade
65-45-12, and shall conform to the applicable requirements of ASME
B16.1, Class 250. Setscrews for setscrewed flanges shall be 1310
MPa 190,000 psi tensile strength, heat treated, and zinc-coated
steel. Gasket for setscrewed flanges shall conform to the
applicable requirements for mechanical-joint gaskets specified in
AWWA C111. Design of setscrewed gasket shall provide for
confinement and compression of gasket when joint to adjoining
flange is made.
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NOTE: At the text below, delete "or steel" when
middle ring of cast iron only is considered
necessary due to anticipated corrosion problems.
Delete requirement for strength of steel when steel
is not allowed as a material for middle ring.
At the text below, minimum numbers of bolts for each
pipe size should be as follows: 75 mm (3 inch),3;
100 mm (4 inch), 4; 150 mm (6 inch), 5; 200 mm (8
inch), 6; 250 mm (10 inch), 7; 300 and 350 mm (12
and 14 inch), 8; 400 mm (16 inch), 9; 450 mm (18
inch), 10; 500 mm (20 inch), 12; 550 mm (22 inch),
13; 600 mm (24 inch), 14.
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SECTION 02531
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