Welding Frame Rails (CONT)

TB 9-2300-247-40

radius part of the rail. Weld the remainder of the

WARNING

joint with 1/8-inch diameter electrodes.

Use only effective chip guarding

Flat, Vertical and Overhead Welding. Use only

equipment, protective equipment and

stringer beads in the flange portion of the rail for

protective clothing (goggles, shields,

flat and overhead welding.

In welding the

gloves aprons, etc) when doing any

groove, the doubler and/or liner is welded into

drilling, grinding, or welding. Failure

the joint. The recommended welding currents

to follow this warning could result in

for flat welding are as follows:

injury to personnel.

(1) Use only stringer beads in the flange portion of

Grinding. Remove by grinding all excess metal

the rail.

and/or weld globules in either the overhead or

vertical position before proceeding with further

(2) For other positions of welding, such as vertical or

welding. All weld reinforcements shall be ground

overhead, adjust welding currents to suit the

smooth.

conditions. Use lowest currents possible to obtain

sound weld deposits.

Slag Removal. Remove slag by chipping and

wire brushing after each pass. Where C-clamps

Crown Welds. Completed welds shall have a

are used, they will not be removed until welds

crown deposit rising above the surface of the rail

have been inspected and found acceptable.

to a maximum of 3/16-inch and not less than

1/8-inch. There shall be no undercutting along

m. Heat Control. Heat control shall be maintained

the edge of weld deposits.

throughout the welding process. If temperatures

reach 750 F within 1-inch in any direction from

the weld, halt the welding process, cover the

area affected with nylon felt cloth, and protect

the area from cold drafts for controlled cooling of

the metal.