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About arc welding:

SMAW, GMAW, MCAW, GTAW, FCAW and SAW welding process are the major arc welding processes. Here are full names of each welding process:

- Shielded Metal Arc Welding (SMAW) or stick welding

- Flux Cored Arc Welding (FCAW), both gas-shielded welding wires (FCAW-G) and self-shielded welding wires (FCAW-S) are used for this welding process.

- Submerged Arc Welding (SAW)

- Gas Metal Arc Welding (GMAW) or Mig welding, either solid wires or metal cored wires are used for GMAW welding process.

- Gas Tungsten Arc Welding (GTAW) or Tig welding

- Metal Cored Arc Welding (MCAW) or Mig welding, metal cored welding wires are used for this welding process.

- Mode of process application for all the major arc welding processes:

(a) Manual welding:

Welding wherein the entire welding operation is performed and controlled by hand.

(b) Semi-automatic welding:

Welding with equipment that supplies continuous wire feed with or without means for mechanical travel. Manual manipulation by the welder of one or more of the variables of speed of travel, guidance, and direction of wire is involved during the welding operation.

(c) Machine welding:

Welding with equipment that performs the welding operation under the constant observation and control of a welding operator.

(d) Automatic welding:

Welding with equipment that performs the welding operation without adjustment of the controls by welding operator.

Specific Welding Procedure Specifications (WPS) are prepared, by our professional engineers, for each of the above major arc welding processes .

What is Welding Procedure Specification (WPS)?

Welding Procedure Specification (WPS) is a general document that outlines shop and field welding practice and limitations for a welding process. Welding parameters and ranges are specified and used to prepare an associated Welding Procedure Data Sheet (WPDS).

What is Welding Procedure Data Sheet (WPDS)?

Welding Procedure Data Sheet (WPDS) is a document, used in conjunction with a Welding Procedure Specification (WPS), detailing the welding parameters and ranges for welding a specific joint, over a range of thicknesses and weld sizes, as illustrated on the data sheet.

What is prequalified Welding Procedure Data Sheet (pWPDS)?

Prequalified welding procedure data sheet includes a joint specified in a governing Code that does not require validation of welding parameters through the performance of a procedure qualification test. So, pWPS does not need a supporting welding document or Procedure Qualification test Record (PQR).

Governing Standards that designate joints as prequalified are CSA W59 Standard, AWS D1.1, AWS D1.3, and AWS D1.6 Code.

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AWS® is a registered trademark of the American Welding Society.
CSA® is a registered trademark of the Canadian Standards Association.
ASME® is a registered trademark of the American Society of Mechanical Engineers.