This general offers tools for the creation of fine quality welds by using certified welders utilizing licensed welding strategies, fabrics, and equipment.
This general covers the fuel and arc welding of butt, fillet, and socket welds in carbon and low-alloy metal piping utilized in the compression, pumping, and transmission of crude petroleum, petroleum items, gas gases, carbon dioxide, nitrogen, and the place acceptable, covers welding on distribution structures. It applies to either new building and in-service welding. The welding can be performed by means of a shielded steel arc welding, submerged arc welding, fuel tungsten arc welding, fuel steel arc welding, flux-cored arc welding, plasma arc welding, oxyacetylene welding, or flash butt-welding strategy or by means of a mix of those tactics utilizing a handbook, semiautomatic, mechanized, or automated welding strategy or a mix of those ideas. The welds should be produced by means of place or roll welding or by means of a mix of place and roll welding.
This typical additionally provides inspection the right way to make sure the right research of welding caliber by utilizing certified technicians and licensed equipment and kit. It covers the approaches for radiographic, magnetic particle, liquid penetrant, and ultrasonic trying out, in addition to the reputation criteria to be utilized to creation welds validated to destruction or inspected by means of radiographic, magnetic particle, liquid penetrant, ultrasonic, and visible trying out methods.
While this common is finished, it will possibly no longer handle all matters which may come up. The absence of steerage or standards isn't to be thought of prohibitive to a selected task or technique that's dependent upon sound engineering judgment. for instance, different criteria, trustworthy engineering checks and analyses, or proven practices may supply worthy connection with identify sound engineering judgment.
Read or Download API Standard 1104. Welding of Pipelines and Related Facilities. 21-th edition PDF
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Extra resources for API Standard 1104. Welding of Pipelines and Related Facilities. 21-th edition
19 mm) and then machined or ground smooth to a width of ½ in. (13 mm). Cut surfaces are smooth and parallel. 500 in. 7 Welding of Test Joints—Fillet Welds To weld the test joint for a fillet weld, a fillet weld shall be made to one of the configurations shown in Figure 10, following all the details of the welding procedure specification. 1 Preparation To test the fillet-welded joint, test specimens shall be cut from the joint at the locations shown in Figure 10. At least four specimens shall be taken and prepared as shown in Figure 11.
300 mm) length of weld exceeds 2 in. (50 mm); c) individual indications of HB, each greater than 1/4 in. (6 mm) in length, are separated by less than 2 in. (50 mm); WELD NG OF P PELINES AND RELATED FACILITIES 41 d) the aggregate length of all indications of HB exceeds 8 % of the weld length. 10 Cracks Cracks shall be considered a defect should any of the following conditions exists: a) the crack, of any size or location in the weld, is not a shallow crater crack or star crack; b) the crack is a shallow crater crack or star crack with a length that exceeds 5/32 in.
The method used shall produce indications of imperfections that can be accurately interpreted and evaluated. The welds shall be evaluated on the basis of either Section 9 or, at the company’s option, Annex A. In the latter case, more extensive inspection to determine the imperfection size is required. Destructive testing shall consist of the removal of completed welds, sectioning of the welds into specimens, and the examination of the specimens. 5. The company shall have the right to accept or reject any weld that does not meet the requirements for the method by which it was inspected.