AWS API 1104 Endorsement case studies
AWS API 1104 Endorsement · Put your knowledge to work in context.
The Pipeline (API 1104) endorsement is one of the CWI and SCWI Endorsements listed by the American Welding Society (AWS) alongside Structural Steel (D1.1), Structural Aluminum (D1.2), Bridge Welding (D1.5), Railroad (D15.1), Aerospace (D17.1), and other specialty endorsements. In plain terms, it is a specialty add-on for people who already hold or are pursuing the Certified Welding Inspector (CWI) or Senior Certified Welding Inspector (SCWI) credential and who want to demonstrate code-specific knowledge of pipeline welding inspection under API 1104 rather than structural or bridge welding codes. The AWS API 1104 Endorsement case studies are 5 cases and about 3,247 words.
1Girth Weld Repair on a High-Strength Line with Marginal Toughness
A 30-inch, grade X70 gas transmission line is being welded with a cellulose-electrode downhill procedure qualified under API 1104. During production, a girth weld is rejected by radiographic inspection for a 40 mm elongated slag inclusion located in the root region.
663 words, about 3 min2Girth Weld Rejection: Porosity Cluster Versus Root Bead Shape
A 24-inch, grade X65 sour-service pipeline is being welded with a low-hydrogen cellulosic downhill procedure. Radiography of a production girth weld shows a cluster of rounded indications in the root region, each about 2 mm, spread over 50 mm of weld length, plus a separate 25 mm elongated indication interpreted as incomplete fusion at the root.
635 words, about 3 min3Cold Bend Fit-Up Gap and Misalignment at a Tie-In
A 16-inch, grade X52 pipeline tie-in is being made at a cold field bend. The bend was made to a 12-degree angle with a radius of 20 pipe diameters.
684 words, about 3 min4Weld Repair of a Sour-Service Girth Weld with Hardness Concerns
A 20-inch, grade X60 sour-service gas line requires a girth weld repair. The original weld was made with a cellulosic downhill procedure and passed radiography, but ultrasonic testing found a 30 mm lack-of-fusion indication in the fill region.
633 words, about 3 min5Radiographic Interpretation Dispute: Slag Versus Lack of Fusion in a Tie-In
A 12-inch, grade X42 tie-in weld is being inspected by radiography. The radiograph shows a linear indication about 18 mm long in the fill region, oriented roughly parallel to the weld axis.
632 words, about 3 min