MECH 6541 NDT QUIZ -1

CONCORDIA

9

Calculate the welding hours for the welding procedure for the pipe butt weld using

the average parameters shown in Data sheet GTAW root + FCAW fill for 20-inch ID

pipe with a thickness of 2 inches (or 51 mm) of API 5L pipe (5 marks).

Assume average wire feed speed for the E491T-9-H4 FCAW wire of 1.6 mm

diameter to be 200 inches per Minute

Ignore the time needed to perform the root pass, and assume the entire pipe is

welded with FCAW process

Assume the field welding productivity to be 5% of the 100% duty cycle shown in

the productivity charts

Assume density of steel to be 0.283 lbs per cubic inch.