This standard covers the gas and arc welding of butt@ fillet@ and socket welds in carbon andl ow-alloy steel piping used in the compression@ pumping@ and transmission of crude pertroleum@ petroleum products@ and fuel gases and@ where applicable@ covers welding on distribution systems. The welding may be donw by a shielded? metal-arc welding@ submerged arc welding@ gas tungsten-arc welding@ gas metal-arc welding@ flux-cored arc welding@ oxyacetylene welding@ or flash butt welding process or by a combination of these processes using a manual@ semiautomatic@ or automatic welding technique or a combination of these techniques. The welds may be produced by position or roll welding or by a combination of position and roll welding.This standard also covers the acceptance standards to be applied to production welds tested to destruction or inspected by radiography. It includes the procedure for radiographic inspection.Processes other than those described above will be considered for inclusion in this standard. Persons who wish to have other processes included shall submit@ as a minimum@ the following information for the committeeapos;s consideration:a. A description of the welding process.b. A proposal on the essential variables.c. A welding procedure specification.d. Weld inspection methods.e. Types of weld discontinuities and their proposed acceptance limits.f. Repair procedures.It is intended that all woek performed in accordance with this standard shall meet or exceed the requirements of this standard.