MIL-T-62032 Trucks, Tank: Fuel Servicing And Aircraft Fuel Servicing, 1,000 To 4,000 Gallon, Diesel And Gasoline Engine Driven, 16,000 To 50,000 Pounds Gvw, 4X2, 4X4, 6X4, And 6X6, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two- or four-wheel drive, and six-wheel, four- or six-wheel drive, single or dual delivery fuel servicing and aircraft fuel servicing tank trucks, with product capacities from 1,000 to 4,000 gallons, having minimum gross vehicle weights GVW of 16,000 to 50,000 pounds for normal operating conditions. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62032H

3.5.11.3 Emergency venting capacity. The vapor flow capacity of the emergency venting system, whether through pressure-actuated or fusible venting, shall be not less than that required by 49 CFR, section 178.341-4, for compartment pressures of not more than 5 psig differential.

3.5.11.4 Automatic vent(s). Vent(s) shall be equipped for hydraulic or pneumatic automatic operationl except class 16 vehicle may be mechanically operated. The automatic vent(s) shall be spring-loaded shut to prevent the spillage of fuel and vapors. The vent(s) shall be mounted in the top of the tank near the longitudinal center. The actuation system shall be capable of exerting a force of at least 150 pounds in order to break the vent(s) loose under icing conditions. The vent(s) shall be interlocked with the automatic flow control valve (see 3.5.13.2) to assure that the vent is open during loading and off-loading operations.

3.5.11.5 Vent construction. The vent(s) shall be of aluminum with a corrosion-resistant steel weld ring with the aluminum isolated from contact with steel, or shall be of

corrosion-resistant steel.

3.5.12 Vapor recovery system. The vehicle shall be equipped for vapor recovery in general conformance to the recommended practice of the American Petroleum Institute (API) in RP 1004, and the California Air Resources Board in executive order G70-10-A. The automatic vent(s) (see 3.5.11.4) shall be furnished with a vapor recovery hood or collecting chamber and shall be manifolded to an overturn rail or other suitable manifold piping. Connections between the tank vapor space vents and the header tube(s) shall be not less than 3 inches in diameter

(7 square inches in open cross-sectional area). The header tube shall be not less than 4 inches in

diameter (12 square inches in open cross-sectional area). The manifold piping, overturn rail, connections and header tube shall be of stainless steel or aluminum.

3.5.12.1 Vapor recovery flange. A standard pipe flange, suitable for future installation of a vapor recovery adapter, shall be furnished. The flange shall be suitable for installation, at the user's option, of either a 4-inch cam and groove quick-coupling conforming to API RP 1004 or a 3-inch cam and groove quick-coupling conforming to MIL-C-27487. The flange shall be of stainless steel or aluminum.

3.5.12.2 Vapor recovery flange location. The vapor recovery flange shall be located on the side of the vehicle opposite the driving controls, between 2.5 and 5 feet above ground level.

3.5.12.3 Vapor recovery system protection. Any portion of the vapor recovery system installed on the top of the tank which could damage the tank in the event of overturn shall be protected by a rollover device. Any portion of the vapor recovery system installed at the rear of the tank shall not extend beyond the rear bumper. The rollover device shall be of stainless steel.