Welding Code and standard
There are 2 Welding code or standard that widely used in Oil and Gas facilities. ASME Boiler and Pressure Vessel Code (BPVC) section 9 provide welding requirement and specification used for Boiler, Pressure Vessel, Process Piping, Power Piping and other facilities. This section 9 is very famous and well known in engineering, welding and inspection community arround the world.
The second book is API 1104. 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 petroleum. petroleum products, fuel gases, carbon dioxide, and nitrogen and, where applicable, covers welding on distribution systems. It applies to both new construction and in-service 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, 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 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 testing methods.
The values stated in either inch-pound units or SI units are to be regarded separately as standard. Each system is to be used independently of the other, without combining values in any way.
In addition of ASME section 9 and API 1104, design and project engineers need to understand welding requirement provided in Construction code like ASME B31.4 or ASME B31.8 for pipeline, API 650 for Tank, ASME B31.3 for process piping and other construction code.