4-7. WELDING CERTIFICATION. Before welding any assembly of the laundry unit, the welder
must be certified as a welder of ferrous metals, aluminum, and stainless steel. The certification is
based on ASME Boiler and Pressure Vessel code, Section IX, and meets or exceeds the intent of the
following military specifications and standards:
(ME), Welding, Steel
MIL-STD-1261, Welding Procedures for Construction Steel
MIL-W-45206A, Welding Aluminum
4-8. WELDING REPAIR. Assemblies of the laundry unit that require general support
maintenance are made up of two types of material: stainless steel and aluminum. Repair of
assemblies containing these types of materials require separate processes and procedures for welding,
cleaning, and painting. Use these procedures to make the repairs.
Components Made of Steel. The following procedures provide instructions for repairing
the air tank, frame assembly, and other components of the laundry that are made of steel.
Before welding, thoroughly clean surface to be welded. Do not use solvent for
Remove burrs and sharp edges.
Weld damaged area in accordance with MIL-W-52574 (ME), Type I.
Weld rods shall conform to Federal Specification E-15599, Class SA 233, 3/32-
Power source can be ac or dc reverse polarity, 30 to 80 amperes.
Penetration shall be full, at 14 inches (36 cm)/minute welding rate.
Preheat material to be welded to 50°F (10°C).
Avoid starts and stops when welding. Chip the slag and restart the weld.
Inspect weld joints for conformance with specification details and for surface
Grind welded seams smooth.
Clean exposed metal surfaces.
Apply one coat of primer (item 6, app C).
Apply finish cost (item 17, app C) in accordance with FED STD 595.
Apply finish coat (item 24, app C) to high temperature areas of laundry components
(dryer hood) in accordance with FED STD 595.