CWE case studies
CWE · Put your knowledge to work in context.
The Certified Welding Educator (CWE) is an American Welding Society credential for people who teach welding principles, practices, and safety in classrooms, labs, and industry training programs. It is aimed at current welding instructors who want to validate their knowledge, skills, and abilities, and at experienced welders moving from hands-on work into teaching, training, or supervisory roles. The CWE case studies are 5 cases and about 2,477 words.
1Confined-Space Hot Work Permit Sign-Off
A maintenance crew is repairing a crack in the shell of a 2.4 m diameter, 3 m long steel tank that last held diesel fuel. The tank has been drained, water-washed, and purged with air for 4 hours.
500 words, about 3 min2Delayed Transverse Cracks After a Thick-Section Repair
A pressure-vessel repair is being made on a 50 mm thick ASTM A516 Grade 70 shell. The repair groove is double-V, 60° included, and is welded with E7018 H4R, 4.0 mm diameter, using a WPS that specifies 20°C minimum ambient, no preheat, and no post-weld heat treatment.
490 words, about 2 min3Combined Groove-and-Fillet Symbol on a Skid Frame
A fabricator receives a drawing for a skid frame. At a T-joint, the welding symbol shows: a single-V groove weld on the arrow side with a 60° groove angle, root opening 3 mm, and a 2 mm root face; a 6 mm fillet weld on the other side; the tail contains 'E7018'; the symbol has an all-around circle; and a flag at the junction.
512 words, about 3 min4WPS Coverage for Thicker Plate in 3G
A shop has a WPS qualified by a PQR made on 9.5 mm (3/8 in) ASTM A36 plate, single-V groove, SMAW with E7018, 1G position, root gap 3 mm, and a qualified thickness range of 3 mm to 19 mm in the WPS. The WPS also lists 'all positions' in the position block.
476 words, about 2 min5Undersized Fillet Weld on a Load-Bearing Bracket
A 6 mm fillet weld is specified on a bracket-to-column T-joint. The weld is 200 mm long and was made in one pass with a 3.2 mm electrode.
499 words, about 2 min