Conveyor to either bypass this operation or move drums
to next operation.
Testing. Testing is done with a 15 psig air test by either
of two procedures. The equipment used and procedures are as follows:
Procedure A. Use a stand for horizontal mounting of a
drum, with hand rotation, while inspecting all chimes and side seams for leaks
under a 15 psig internal air pressure. Apply soapsuds to all inspected areas
to aid in leak detection.
Procedure B. A water bath for drum submergence and
leak detection shall be provided while under 15 psig internal air pressure.
(c) Conveyor. For either procedure, a conveyor shall be
provided to move drums to the test stand and for subsequent operations.
(7) Welding. When necessary, drums can be repaired by welding.
For fire safety, welding operations should be carried out in a separate
building or shes. Equipment used includes:
(a) Suitable movable racks with rollers for drum handling
A conveyor to move repaired drums to the test stand for
retesting with 15 psig air pressure.
Internal Preservation. Either before or after exterior
painting, the interior of each drum is sprayed or fogged with 25 cubic
centimeters of light preservative oil conforming to Lubricating Oil General
Purpose Preservative (Water-Displacing Low Temperature), Federal Specification
VV-L-800. A portable air spray gun is needed for this operation.
(9) Painting. Drums are externally painted and stenciled. Spray
painting areas shall be in accordance with NFPA 33. Equipment used in the
painting operation includes:
Spray booth for manual spray painting, equipped with
means for conveying drums horizontally, and rotating them during spraying.
Exhaust fan in booth to remove paint fumes through a
baffled water spray curtain. The booth bottom is designed as a water sump.
Paint spraying equipment, designed for air pressures of
30 psig for spraying and 10 psig for drum stenciling. Furnish equipment for
Preheater to heat drums using hot air to about 110 F
with conveyor of sufficient length so painted drums will be dry to touch after
leaving a spray booth.
Storage areas for paint curing. Suitable out-of-doors
space shall be provided fur about a 4-hour paint curing time.