Cert III Welding case studies
Cert III Welding · Put your knowledge to work in context.
The Certificate III in Welding is a trade-level qualification for people who want to work as welders in fabrication, construction, mining, agriculture, or manufacturing settings. It suits apprentices building a career from the ground up as well as experienced hands who need their skills formally recognised. The Cert III Welding case studies are 5 cases and about 2,270 words.
1Fume Extraction Failure on a Confined Fillet Weld
You are MIG welding 6 mm mild steel fillet joints inside a 2.4 m x 1.8 m x 2.1 m steel tank that has one 600 mm access opening. The portable fume extraction unit's flow indicator sits at the low edge of its green band.
469 words, about 2 min2Distortion and Fit-Up on a Thin-Walled Stainless Frame
You are fabricating a rectangular frame from 1.6 mm thick 304 stainless steel tube, 40 mm x 40 mm, with mitred corners. The drawing specifies a 1 mm maximum gap at the joints and a finished diagonal tolerance of +/-2 mm over 1200 mm.
443 words, about 2 min3Porosity on a Pressure Pipe Root Pass
You are TIG welding the root pass on 50 mm NB schedule 40 carbon steel pipe in the 6G position for a low-pressure air line. The procedure requires a consumable insert and argon purge.
484 words, about 2 min4Reading a Weld Symbol on a Structural Drawing
A drawing for a steel bracket shows a fillet weld symbol on the arrow side with a 6 mm leg, a length of 150 mm, a pitch of 200 mm, and a tail note reading 'WPS 04, PWHT not required'. A second symbol on the same joint is on the other side of the reference line with a 5 mm leg and a length of 75 mm.
436 words, about 2 min5Maintenance and Housekeeping Around a Shared Welding Bay
You share a welding bay with two other welders. The bay has a fixed extraction hood that has not been cleaned for months, a tangle of leads and hoses across the walkway, and an angle grinder with a cracked guard sitting on the bench.
438 words, about 2 min