Welding Certifications, Symbols and Methods

Welders are tested by independent labs to insure their work meets The American Welding Society’s standards for form, strength and penetration. The certification documents are kept on file and are submitted to clients as proof of quality craftsmanship.

Welding symbols are placed on drawings by designers/engineers to signal to a welder the type of weldment required at a specific point or series of points in an assembly. These symbols tell a welder whether the weldment is to be made in the shop or in the field; whether it is to be staggered and intermediate; or if it is to be continuous all around. These symbols are found on the working drawings and most often take the form of a heavy black arrow with attached triangles or arcs.

The five essentials for proper welding procedures are;

1.  Electrode Size

2.  Current

3.  Arc Length or Voltage

4 . Travel Speed

5.  Electrode Angle

Robinson Iron uses a number of different sizes and types of electrodes for welding. The 41 MP Pure Nickel electrode is used to weld cast iron/steel; R4043 Aluminum electrode is used to weld aluminum; 3S1B Silicon Bronze electrode is used to weld silicon bronze. To learn more about welding visit the American Welding Society at www.aws.org.

Dangerous flares produced by welding can damage unprotected eyes. Safety equipment is a must!

Welding electrodes or “rods” are packed in sealed metal cans to protect them in shipment and to keep the surrounding flux material dry.

Welding Symbols are arrows with attached triangles/flags indicating the type of weldments required.