This general provides tools for the construction of top quality welds by using certified welders utilizing licensed welding techniques, fabrics, and equipment.
This common 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 appropriate, covers welding on distribution structures. It applies to either new building and in-service welding. The welding can be performed via a shielded steel arc welding, submerged arc welding, gasoline tungsten arc welding, fuel steel arc welding, flux-cored arc welding, plasma arc welding, oxyacetylene welding, or flash butt-welding approach or by means of a mix of those techniques utilizing a handbook, semiautomatic, mechanized, or automated welding strategy or a mixture of those suggestions. The welds will be produced via place or roll welding or through a mix of place and roll welding.
This ordinary additionally offers inspection tips on how to make sure the right research of welding caliber by using certified technicians and licensed tools and kit. It covers the methods for radiographic, magnetic particle, liquid penetrant, and ultrasonic checking out, in addition to the attractiveness criteria to be utilized to construction welds verified to destruction or inspected by means of radiographic, magnetic particle, liquid penetrant, ultrasonic, and visible checking out methods.
While this average is complete, it could no longer handle all concerns which may come up. The absence of steerage or necessities isn't really to be thought of prohibitive to a selected job or strategy that's dependent upon sound engineering judgment. for instance, different criteria, trustworthy engineering checks and analyses, or proven practices could provide precious connection with determine sound engineering judgment.
Read or Download API Standard 1104. Welding of Pipelines and Related Facilities. 21-th edition PDF
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Additional resources for API Standard 1104. Welding of Pipelines and Related Facilities. 21-th edition
Any length of IC is acceptable, provided the density of the radiographic image of the IC does not exceed that of the thinnest adjacent parent material. 7) are applicable. 1 General A BT is defined as a portion of the root bead where excessive penetration has caused the weld puddle to be blown into the pipe. 375 in. 3 mm), a BT shall be considered a defect should any of the following conditions exist: a) the maximum dimension exceeds 1/4 in. (6 mm) and the density in any portion of the BT’s image exceeds that of the thinnest adjacent parent material; b) the maximum dimension exceeds the thinner of the specified wall thicknesses joined and the density in any portion of the BT’s image exceeds that of the thinnest adjacent parent material; c) the sum of the maximum dimensions of separate BTs whose image density for any portion of the BTs exceeds that of the thinnest adjacent parent material and exceeds 1/2 in.
1 General For multiple qualification, a welder shall successfully complete the two tests described below, using qualified procedures. For the first test, the welder shall make a butt weld in the fixed position with the axis of the pipe either horizontal or inclined from horizontal at an angle of not more than 45°. 625 in. 250 in. 4 mm) without a backing strip. 6. Specimens may be removed from the test weld at the locations shown in Figure 12, or they may be selected at the relative locations shown in Figure 12 but without reference to the top of the pipe, or they may be selected from locations that are spaced equidistantly around the entire pipe circumference.
4 mm) in outside diameter, nick break and root bead specimens from two welds or one full-section tensile strength specimen is taken. 5. 2 Inspection Requirements When radiography is utilized, radiographs shall be made of each of the test welds. 3. When automatic ultrasonic testing is utilized, each test weld shall be fully examined. 6. Radiographic testing or automatic ultrasonic testing shall not be used for the purpose of locating sound areas or areas that contain imperfections and subsequently making tests of such areas to qualify or disqualify a welder.