Sec. 1276.7. Methods of discharge or transfer

(a) Pumps.

The flammable liquid cargo shall be discharged only by operation of hazardous liquid discharge pumps, driven by a power take-off device from the truck engine. Evidence of approval of such discharge pumps by a laboratory or testing establishment designated by the airport operator shall be submitted. Pumping compartments, if any, shall be ventilated to avoid accumulation of fumes. Power take-off devices shall include mechanical, hydraulic, or electric units.

(b) Piping, hose and nozzle.

The cargo shall be discharged through a system of rigid piping joined together by welding, screwed fittings, of vitaulic gruv-a-grip flanged connections with O-ring or equal gaskets or equal couplings, and if necessary or desirable flexible hose connections. Flexible hose connections, if used, shall be of armored or protected type gasoline hose fitted with standard screwed or flanged pattern fittings affixed to the hose by standard internal expanding rings or machine pressed collars. Cargo lines between the tank and the pump section shall be tested with the cargo tank as indicated in section 1276.6. Cargo lines from the pump through the discharge hose shall be hydrostatically tested when so required by the airport operator to a pressure 50 pounds above the normal working pressure and so certified to the airport operator in writing. The delivery of product shall at all times be under the control of the vehicle attendant through the use of approved self-closing nozzles or approved underwing fueling control devices operated by the attendant designed to shut off automatically upon release of hand or foot pressure—latching or fastening devices on control units are not permitted. No delivery hose or hoses shall be used except:

(1) Standard hose designed to handle gasoline or similar aircraft fuel at the highest pump operating pressures with allowances for surge conditions.

(2) Standard make hose and fittings used in connection with overwing or underwing fueling; provided that such hose shall be fitted with bronze hose fittings affixed by standard internal expanded rings or machine pressed collars, and self-closing nozzles with a static bonding wire and clip or jack securely fastened to insure a good bond. Evidence of approval of such hose, fittings and nozzle by a laboratory or testing establishment designated by the airport operator shall be submitted when required.

(3) Hose used for product transfer shall be inspected daily and checked for leaks, worn spots, worn gaskets, and fittings. Hose having cuts, nicks, worn or weak spots should be replaced or removed for standard hydrostatic pressure testing. The test pressure should be 150 psig for average usage applied by hand pump on a fully charged, air free hose and maintained for at least five minutes.

(c) Plumbing and accessory equipment.

All piping, fittings and valves and accessory equipment (except those components which are located inside the product storage tank or tanks upstream of the filter and normally closed, safety shut-off valve under dead-man control shall be of steel, malleable iron, heavy cast iron, bronze or other composition metal having a melting point in excess of 1600 degrees Fahrenheit.

(d) Filters.

All filter system and fuel storage vessels containing 30 gallons or more fuel shall be made of steel and shall have all openings for product transfer arranged to prevent gravity discharge. All other fuel handling rigid plumbing shall be of metal construction.

(e) Valves and connections.

All tank vehicles wherein the discharge piping is connected to the bottom of the cargo tank compartments shall be equipped with an automatic shut-off valve located inside the shell of the tank in each compartment outlet. On tank vehicles with discharge piping or pump suction piping connected from the top of the cargo tank, there shall be arranged in the suction portion of piping, between every compartment and each pump, an automatic valve or valves designed to close off the flow of product. Except during tank filling or fuel delivery operations, such valves shall be kept closed. The operating mechanisms for discharge valves shall be provided with two secondary manual “emergency” controls located on opposite sides and ends of the tank vehicle separate from the regular discharge valve operating mechanism, and such control mechanism shall also be provided with fusible elements, sections or links at each discharge valve arranged to cause the valves to close automatically in the event of fire. The fusible elements shall operate at a temperature not exceeding 200 degrees Fahrenheit. The release mechanism for internal or discharge valves under manual and/or fusible control shall be arranged to effect closing of such valves and stop product discharge in not more than 10 seconds operating time.

(f) Propulsion and pumping engine.

The propulsion and pumping engine shall be arranged with safeguards to reduce ignition sources to a minimum and shall include:

(1) The carburetor shall be fitted with an approved back flash arrestor (baffled and screened air cleaner acceptable).

(2) All wiring shall be adequately insulated, fastened to eliminate chafing and affixed to terminal connections by tight fitting snap or screw connections with rubber or similar insulating and shielding covers, boots or sleeves.

(3) Glass or plastic bowls or compartments for carburetors, fuel pumps or filters shall not be used unless the failure of such devices discontinues fuel supply to the engine and will not permit gravity discharge of fuel from the engine fuel supply tank.

(4) Starting motors and generators should be mounted at least two feet above the ground level or be of fully enclosed pattern preventing any fuel spill vapors from being drawn into the starter or generator through ventilating openings.

(g) Markings of emergency control.

The emergency operating devices shall be conspicuously marked with two inch letters on contrasting background reading “EMERGENCY SHUT OFF” with other appropriate operating instructions as required such as push-pull-operating arrows, etc.

(h) Piping, equipment, hose and nozzles.

Section 1276.6, relating to composition of plumbing and accessory equipment, shall be complied with. The refueling vehicle shall have a system of rigid piping joined together by welding, screwed fittings, or vitaulic gruv-a-grip or equal couplings, and if necessary or desirable, flexible hose connections. Flexible hose connections, if used, shall be of armored or protected type for gasoline, fitted with standard screwed or flanged pattern fittings affixed to the hose by standard internal expanding rings or machine pressed collars. All cargo lines and hose shall be hydrostatically tested when so required by the airport operator to a pressure 50 pounds above the normal working pressure and so certified to the airport operator in writing. No delivery hose or hoses shall be used except: Standard hose designed to handle gasoline or similar overwing refueling; provided that such hose shall be fitted with bronze hose fittings affixed by standard internal expanded rings or machine pressed collars, and self-closing nozzles with a static bonding wire and clip or jack securely fastened to insure a good bond. Evidence of approval of such hose, fittings and nozzle by a laboratory or testing establishment designated by the airport operator shall be submitted when required.