API 577 case studies
API 577 · Put your knowledge to work in context.
API 577, listed by the American Petroleum Institute under its Individual Certification Programs (ICP), is a certification in welding inspection and metallurgy aimed at personnel who review, witness, and evaluate welding work in oil, gas, and petrochemical facilities - inspection staff, welding inspectors, engineers, and QA/QC personnel who need a working command of both weld quality and the metallurgical reasons welds fail. Candidates typically encounter it as a multiple-choice exam, and study usually spans five connected areas: inspection and quality assurance practice, welding processes with procedure and welder qualification, metallurgy and materials behavior, nondestructive examination methods, and fabrication with welding-related damage and repair. The API 577 case studies are 5 cases and about 3,484 words.
1Postweld Heat Treatment Chart With Two Cold Thermocouples
A shop has finished a 2-1/2 in. (63 mm) thick SA-516 Gr.
711 words, about 4 min2Welder Certificates That Do Not Match the Joint Being Welded
A contractor must install a 6 in. The WPS is backed by a PQR made on 3/8 in.
695 words, about 3 min3A Single High Hardness Reading in a Wet H2S Separator
70 wet-H2S separator was PWHT'd at 1150 °F for 75 minutes. A portable Leeb hardness gauge, converted to HBW, gives 168 on the long seam, 152 on shell plate, 196 on a repair weld, and a single reading of 214 in the heat-affected zone of a 4 in.
685 words, about 3 min4Radiography Says Slag, Ultrasonics Says Nothing
70 shell course was radiographed per UW-51 using a single-wall technique and a 2-2T hole-type IQI on the source side, with film density 2.3-2.6. length of longitudinal seam the film shows a rounded indication about 3/16 in.
682 words, about 3 min5A Weep at a Repair Toe During Hydrotest
70 knockout drum has been PWHT'd and is on hydrotest at 1.3 times MAWP. During the hold a weep appears at the toe of a 3 in.
711 words, about 4 min