Coded welding is used in all aspects of industrial steelworks projects. This type of welding can be carried out on steelwork assembly, structural steelwork, pipeline assembly and pipework installation. A coded welder is someone who has completed an approval test conforming to a specific welding configuration. In the UK welding approval codes are done to BS EN standards. Each coded welding specification requires testing and examination to become a multi coded welder.
There are three main types of welding these are TIG (Tungsten Inert Gas), MIG (Metal Inert Gas) and MMA (Manual Metal Arc). TIG welding is often used for stainless steel tube of various diameters and wall thicknesses. MIG welding is mainly used for structural steel work and MMA welding is often used for carbon steel pipework and structural steel.
To test the welds there are various methods which can be implemented. NDT Testing (Non-Destructive Test) is the most common form of testing and usually a 5% weld inspection is common. Other methods of testing include VT Testing (Visual Inspection), MT Testing (Magnetic Particle Inspection), PT Testing (Liquid Penetrant Inspection), UT Testing (Ultrasonic Inspection) and X-Ray (Radiographic Inspection).
The actual welding process can be carried out either on-site or at a workshop and then taken to the customer to be installed. Coded welding is used in many different industrial sectors throughout the United Kingdom and Europe.