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About arc welding:

SMAW, GMAW, 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

- 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 prequalified Welding Procedure Specification (pWPS)?

Prequalified welding procedure specification 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 AWS D1.1, AWS D1.3, and AWS D1.6 Code.

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