TM 10-3510-209-24
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:
a.
MIL-W-52574 (ME), Welding, Steel
b.
MIL-STD-1261, Welding Procedures for Construction Steels
c.
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.
a.
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.
(1)
Before welding, thoroughly clean surface to be welded. Do not use solvent for cleaning.
(2)
Remove burrs and sharp edges.
(3)
Weld damaged area in accordance with MIL-W-52574 (ME), Type I.
(a)
Weld rods shall conform to Federal Specification E-15599, Class SA 233, 3/32-inch diameter.
(b)
Power source can be ac or dc reverse polarity, 30 to 80 amperes.
(c)
Penetration shall be full, at 14 inches (36 cm)/minute welding rate.
(d)
Preheat material to be welded to 50F (10C).
(e)
Avoid starts and stops when welding. Chip the slag and restart the weld.
(4)
Inspect weld joints for conformance with specification details and for surface uniformity.
(5)
Grind welded seams smooth.
(6)
Clean exposed metal surfaces.
(7)
Apply one coat of primer (item 6, app C).
(8)
Apply finish coat (item 7, app C) in accordance with FED STD 595.
(9)
Apply finish coat (item 24, app C) to high temperature areas of laundry components (dryer hood) in
accordance with FED STD 595.
4-4 Change 2
