NCCER Welding case studies
NCCER Welding · Put your knowledge to work in context.
NCCER is a 501(c)(3) nonprofit education foundation created in 1996 that describes itself as the nation's leader in providing construction industry education, assessments, credentials and accreditation. Its welding credential sits inside a craft catalog of training programs that NCCER says are built for industry by industry, and its credentials span all construction trades - serving both emerging and experienced craft professionals. The NCCER Welding case studies are 5 cases and about 2,581 words.
1Entry and Hot Work on a Diesel Tank
A maintenance crew must weld a 6-inch square patch over a crack on the inside shell of a 1,500-gallon horizontal steel tank that last contained No. The tank was drained 24 hours ago and the drain valve left open; about 2 inches of sludge remain at the bottom.
555 words, about 3 min2Tip Selection and Cut Quality on 3/4-in Plate
A track torch is cutting 3/4-inch A36 plate into 12-inch-wide base plates. The operator installs a size 4 cutting tip, sets oxygen at 45 psig and acetylene at 10 psig, and holds the tip about 1/2 inch above the plate.
536 words, about 3 min3Fillet Weld Rejection on Contaminated A36
A fabricator is attaching 1/4-inch A36 clip angles to a 1/2-inch A36 beam with 1/4-inch fillet welds. The beam has tight mill scale, a film of water-soluble cutting fluid, and patches of surface rust.
481 words, about 2 min4E7018 Electrode Exposure and Porosity
A welder is making a single-V butt weld in 3/8-inch A36 plate with 1/8-inch E7018 H4R electrodes on DCEP at 125 A. The root gap is 1/8 inch and the land is 1/16 inch.
480 words, about 2 min5AC GTAW Porosity on 6061-T6 Tubing
A welder is joining 1/8-inch-wall 2-inch-OD 6061-T6 aluminum tube to a cast aluminum elbow. The machine is set to AC, 60 Hz, 80% cleaning action, 90 A, and 12 cfh argon through a #6 cup.
529 words, about 3 min