Welder Certificate is a document that shows ability of a welder to make a quality weld in a particular welding process.
The Certificate also denotes on which type of welding material and which position the welder is able to perform. A full penetration weld can be performed by welder who is qualified for full penetration & fillet. A welder qualified by vertical position (3G) can perform Flat and vertical in production and so on. These qualification ranges are mentioned in the certificates after referring the applicable codes and standards. Welders are qualified for different process individually. Welding process:
Shielded Metal Arc Welding (SMAW)- Arc Welding
Tungsten Inert Gas Welding (TIG/GTAW)- Arc Welding
Metal Inert Gas Welding (MIG)- Arc
Metal Active Gas welding (MAG)- Arc
Flux Cores Arc Welding (FCAW)- Arc
Electric Resistance welding (ERW) and Lot more..
Welding Qualification standards are given in
AWS D 1.1 – Structural Welding Code- Steel.
AWS D 1.3 – Sheet metal welding code.
AWS D 1.6 – Stain steel Welding
ASME section IX – Boiler & pressure vessel/pipelines Arc Welding.
ISO 9606-1- International Standard for Arc Welding.
What are the procedures for welder qualification? Or What is the procedure for qualifying a welder?
Conclude the range of qualification such as, plate or pipe, thickness, metal grades, pipe diameter, full penetration or fillet.
Choose an appropriate WPS – Welding Procedure specification
Prepare a test coupon to the required dimension- refer code for dimension
Tack welds the test coupon in the required positon with appropriate root gap bevel preparation.
Make the welding as told in the WPS
Visually inspect the coupon
Make a bend test or Radiography( RT) on the test coupon.
After clearing the test- the welder is qualified.
For Welder qualification & welding procedure specification (wps) preparation and approval Visit https://aqcinspection.com/ or call 9489342244 or 0422-4342244. To know about AWS visit http://www.aws.org
Comments