Types of weld imperfections and their proposed accep- tance limits. Persons who wish to have other processes included shall submit, as a minimum, the fol- lowing information for the committee’s consideration: a. Processes other than those described above will be consid- ered for inclusion in this standard. Each system is to be used independently of the other, without combining values in any way. The values stated in either inch-pound units or SI units are to be regarded separately as standard. This standard also covers the procedures for radiographic, magnetic particle, liquid penetrant, and ultrasonic testing, as well as the acceptance standards to be applied to production welds tested to destruction or inspected by radiographic, magnetic particle, liquid penetrant, ultrasonic, and visual test- ing methods. The welds may be produced by position or roll welding or by a combination of position and roll welding.
The welding may be done by a shielded metal-arc welding, submerged arc welding, gas tungsten-arc welding, gas metal-arc welding, flux-cored arc welding, plasma arc welding, oxyacetylene welding, or flash butt welding process or by a combination of these processes using a manual, semi- automatic, mechanized, or automatic welding technique or a combination of these techniques.
It applies to both new construction and in-service welding. This standard covers the gas and arc welding of butt, fillet, and socket welds in carbon and low-alloy steel piping used in the compression, pumping, and transmission of crude petro- leum, petroleum products, fuel gases, carbon dioxide, nitro- gen and, where applicable, covers welding on distribution systems. API 1104 pdf download.Welding of Pipelines and Related Facilities
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