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Grooved end pipe clamp couplings or flanges |
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|  MIL-T-62357A
(b) Forced discharge through the main shutoff valve to a 1.500 inch faucet with cam lock
fitting at the front of the trailer. A dust cap or dust plug and security chain or cable shall
be provided for the 1.500 inch faucet.
(c) Self-loading of the tank from a nonpressurized external source (with the main shutoff
valve closed, in through the 3 inch gravity discharge faucet by use of either 1.500 inch
hose and the reducer specified in 3.9.19, through the pump, out through the 1.500 inch
forced discharge faucet and into the tank through the manhole fill cover opening by use
of the other 1.500 inch hose specified in 3.9.19). Bottom loading capability shall not be
furnished.
3.9.2 Plumbing system, type II. The plumbing system on type II shall provide for:
(a) Gravity discharge through the emergency valve and the 3-inch gravity discharge faucet
(see 3.8.2).
(b) Forced discharge through the emergency valve to a 1.500 inch faucet with cam lock
fitting at the front of the trailer. A dust cap or dust plug and security chain or cable
shall be provided for the 1.500 inch faucet.
(c) Self-loading of the tank from a nonpressurized external source (with the emergency valve
closed, in through the 3-inch gravity discharge faucet by use of the 1.500 inch hose
specified in 3.9.22, through the pump, out through the 1.500 inch forced discharge faucet
and into the tank through the manhole fill cover opening by use of the 3-inch hose
specified in 3.8.3). Bottom loading capability shall not be furnished.
3.9.3 Piping and couplings. All piping shall be not less than 3 inch inside diameter tubing
with long sweep bends or 3 inch nominal diameter pipe with long sweep elbows. Piping shall be
installed to withstand expansion and vibration without failure and shall conform to the strength
requirements of DOT Specification DOT 406. All threads shall be of the American National
Standard pipe thread series. Victaulic or equal couplings shall be used only on pipe (not on
tubing).
3.9.4 Grooved end pipe clamp couplings or flanges. Clamp couplings or flanges, (Victaulic
or equal) shall be provided on the inlet and outlet sides of the pump and strainer and on the
faucets specified in 3.9.1 (type I) or 3.9.2 (type II).
3.9.5 Pipe grooves for couplings. Pipe grooves for couplings shall be in accordance with
dimensions specified by the coupling manufacturer. The groove and outside diameters shall be
concentric to each other. The groove and the ends of the pipe shall have a chamfer of 0.003 to
0.005 inch. The outside diameter of the pipe between the groove and the end of the pipe shall be
smooth without evidence of scale, seams, weld splatter, digs or scratches. The fitting shall be
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