GENERAL

API 1104 provides a list of permitted welding processes, and does not allow for substitutions without formal consideration by the API 1104 Committee.

The following list, in the same order as in Section 1, gives common industry abbreviations and nonstandard names for the permitted processes:

• Shielded metal arc welding (SMAW), also called stick welding.

• Submerged arc welding (SAW), also called subarc.

• Gas tungsten arc welding (GTAW), also called tungsten inert gas (TIG) and heliarc welding.

• Gas metal arc welding (GMAW), also called metal inert gas (MIG) welding.

• Flux-cored arc welding (FCAW).

• Plasma arc welding (PAW).

• Oxyacetylene welding (OAW), also called gas welding.

• Flash butt welding (FW).

API 1104 also discusses the use of manual, semiautomatic, mechanized, or automatic welding techniques. For definitions of these techniques, see Section 3 of API 1104. Study Guide Table 1.1 indicates which of the permitted welding processes you may perform using each technique.

API 1104 covers procedures and acceptance standards for various kinds of nondestructive testing. The following list, in the same order as in Section 1, gives common industry abbreviations and nonstandard names:

• Radiographic testing (RT) (x-ray and gamma radiation testing).

• Magnetic particle testing (MT).

• Liquid penetrant testing (PT).

• Ultrasonic testing (UT).

• Visual testing (VT).

API 1104 contains values stated in U.S. Customary (inch-pound) Units and SI (metric) Units. The U.S. Customary values appear first, followed by the SI Units in parentheses, but the SI Units are an approximation of the corresponding U.S. Customary Units. API 1104 emphasizes that you must use one system or the other, and not combine them.