MIL-STD-869D
b. The power supply unit shall not be less than 40 (KW) capacities at
100% duty cycle.
c. The power feeder unit shall be capable of supplying a metered and constant flow of powdered material to the gun.
d. Extension equipment capable of spraying at a 90° angle for holes may be incorporated as a component part.
e. Control unit, heat exchanger, approved gauges, flow meters, hoses, power cables, and cooling devices shall complete the system.
4.1.4 Wire/Arc Spray System. The arc spray system shall consist of a gun capable of simultaneously feeding two wires at a controlled rate of speed, and delivering a fine atomized spray on a prepared surface. The gun shall be capable of producing coatings with bond strength of not less than 4,000 psi.
a. The gun shall be hand held or machine mounted and be capable of controlling wire feed rate. The gun shall also be capable of operating solely on compressed air and/or electrical current.
b. The power supply unit shall be capable of delivering amperage and voltage at 100% duty cycle.
c. The control unit shall be compatible with automatic traverse equipment, and include air, amperage and voltage controls and monitors.
d. Wire control units shall include wire straighteners.
e. Hoses, lines and cables will comprise the balance of the system.
4.1.5 Abrasive Blasting Equipment. Abrasive blasting equipment is required to roughen areas to be flame sprayed. Parts should be previously cleaned. Particular care should be taken to keep abrasive grit from contaminating surrounding area. Blasting equipment should be used solely for preparing parts for flame spray. Manufacturer's recommended procedures should be followed.
4.1.6 Flame Spray Wire. Only wires specifically manufactured for flame spray shall be used otherwise specified by the responsible engineering authority. The chemical composition of the material to be used shall be specified in the contract or purchase order for the materials. See manufacturer's handbook and current technical bulletins.
4.1.7 Flame Spray Powders. Powders used for flame spraying shall be designed specifically for flame spraying and the powder supplier shall so specify and certify that:
a. The material has been inspected for size and that the size is in accordance with the size range spelled out in the purchase order.
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