This standard prescribes minimum requirements for the design, materials, fabrication, erection, test, and inspection of power and auxiliary service piping systems for electric generation stations, industrial institutional plants, central and district heating plants.

ASME B31.3 contains requirements for piping typically found in petroleum refineries; chemical, pharmaceutical, textile, paper, semiconductor, and cryogenic plants; and related processing plants and terminals.

This Standard provides minimum requirements and recommendations to protect persons who work in an environment affected by welding, cutting, and allied processes from illness and injury, and to prevent damage to property arising from the installation, operation, and maintenance of equipment used in these processes.

This standard specifies the requirements for establishing and maintaining the certification of welding inspection organizations working within one or more product categories and using one or more inspection methods.

This Standard covers the certification of welding inspectors at three certification levels. It specifies the responsibilities and the basic technical functions associated with each level.

This standard sets the criteria for companies seeking certification for Welding of Reinforcement Bars in Reinforced Concrete Construction for steel. Companies who wish to be certified under this standard are required to qualify their Welding Supervisors and their Welding Engineers, submit for review and approval their Company’s Welding Procedures and qualify their Welding personnel (welders or operators).

CSA W47.1 contains requirements for companies seeking certification for the fusion welding of steel. It contains guidance on the qualification of welding engineers and welding supervisors, welder performance testing, and requirements for the development and qualification of welding procedures.

This Standard specifies requirements for certification of companies engaged in fusion welding of aluminum performed as part of the fabrication or erection of aluminum structures.

Filler metals standards are intended to provide a generic method of classification and evaluation that allows the end user to select appropriate welding consumables for a given welding process and product or application.

This Code covers the requirements for equipment, preparation and methods of weld process control, inspection and testing, used in resistance welding of components or assemblies which form part of a structure which is designed to carry calculated loads including open web joists, open web rigid frame members, roof and floor decking, etc.

Welded Steel Construction (Metal Arc Welding) W59 contains requirements for welded steel (carbon and low-alloy) construction. It contains guidance on design of welded connections, electrodes & consumables, base metals, workmanship, inspection, quality levels, and stud welding.

This Standard specifies the requirements for all types of welded aluminum construction, and is of general application. There are, however, special Standards which may be used for particular products, such as, pressure vessels and pipelines.