CWB Welding Inspector Level 3 case studies
CWB Welding Inspector Level 3 · Put your knowledge to work in context.
This page supports study for the CWB Level 3 Welding Inspector examination, a multiple-choice assessment for experienced inspection personnel working to Canadian welding codes and standards. The CWB Group describes itself as dedicated to advancing the welding and joining industry through certification, education and advocacy, and it lists inspector certification among its services alongside public directories of certified inspectors and certified welding inspection companies. The CWB Welding Inspector Level 3 case studies are 5 cases and about 4,131 words.
1A 6G Pipe Test Offered as Cover for a Small-Bore GTAW Joint
A fabricator's welder performance records show one welder tested in August 2023 on 8.625 in OD × 11.1 mm wall pipe in the 6G position: GTAW root and hot pass with ER80S-B2 (F-6), SMAW fill and cap with E8018-B2 (F-4), P-No. 4 base metal, consumable insert open root, all test specimens passing bend.
809 words, about 4 min2Delayed HAZ Cracking on a Thick Nozzle Weld
A shop welds a 45 mm thick SA-516 Grade 70 shell course to a P-No. 1 forged nozzle using SMAW with E7018-H4R electrodes, 3.2 mm root and 4.0 mm fill passes.
886 words, about 4 min3Radiography Accepted the Weld; TOFD Did Not
A 38 mm thick, 2.25Cr-1Mo (P-No. 5A) main steam pipe girth weld was radiographed with Ir-192 using a single-wall single-image technique, 100% coverage, IQI sensitivity 2.0%, film density 2.4, and was accepted by the third-party inspector against the project's radiography acceptance criteria.
836 words, about 4 min4A Customer Specification Stricter Than the Construction Code
A contract invokes ASME Section VIII Division 1 for a new vessel and adds a customer specification stating: 'All carbon steel butt welds shall be impact tested at −45 °C with 27 J minimum, irrespective of code exemption. All Category A and B welds shall be 100% radiographed.' The vessel MDMT is −45 °C, and the designer's UCS-66 calculation shows the material is exempt from impact testing because the coincident ratio is low.
765 words, about 4 min5Audit Findings Five Weeks Before Delivery
During an internal audit of a pressure-vessel shop, the QA manager records: 9 of 62 WPSs in use on the floor reference PQR numbers that are not in the controlled PQR file; 4 of 18 welders have no continuity record for more than six months yet have been welding; two welding machines and one digital thermometer carry calibration stickers expired by four months; 27 radiographs from the last quarter lack location markers; and 6 of 8 nonconformances raised at the previous audit are still open with no root-cause statement. The shop is 70% complete on a vessel due in five weeks, with 100% radiography required.
835 words, about 4 min