Coded Welding

Coded Welding services have always been a mainstay of Linmar Pipework. We are more than a pipework installation company in that we can design, repair and manufacture special equipment requiring all forms of welding including coded. The term 'Coded Welding or 'Coded Welder' simply means that the individual has passed an industry approved examination to assess their ability and confirm aptitude in a specific welding configuration.

Our long experience in pipework design and installation has required us to obtain certification to insure we are compliant with industry regulations which has meant training for our operatives as coded welders.

There are many variants in becoming a coded welder, it does not mean that to be coded in one area of work that you are qualified in another. Some codes are job specific while others are more general. Each specification will be tested accordingly usually by providing a work sample to be approved by an examiner.  Welding codes in the UK are approved to BS EN standard and to ASME IX in America.

Many projects will not require certification however our expertise will remain as if it did. Where high pressure pipelines are needed or in boiler installations as another example, you will need a coded welder to ensure minimum standards are met. No one wants an accident stemming from inadequate workmanship. Here at Linmar Pipework we are able to offer services on a range of materials and welding processes, our certifications can be viewed or downloaded below.

Typical welding processes carried out by Linmar.

Shielded Metal Arc Welding

Bit of a mouthful, it is usually referred to as 'Stick Welding' or just plain 'ARC Welding'. It can be used on most materials including Steel, aluminium and copper alloys. Useful in on site or mobile welding as it can be used outdoors in adverse conditions. Stick Welding has the longest history being used extensively in industry and is  popular among the welding fraternity particularly as a beginner. Needing no shielding gas as the special coating on the welding stick burns off while welding producing a vapour which protects the weld from atmospheric contamination. However while versatile the process produces molten splatter which adheres around the welded section. This leaves a less tidy weld and results in much post process cleaning to obtain a satisfactory result.

TIG Welding 

Short for Gas Tungsten Arc Welding Tig is the most difficult form of welding to perfect. TIG Welding uses a non consumable electrode made from Tungsten. Tungsten can be heated to around 3400ÂșC before melting forming an electric arc of even higher temperature between the tungsten tip and the work piece. By feeding in a filler metal a very clean weld can be formed with no splatter. TIG welding, when done properly, makes the most beautiful welds and is favoured by many in manufacturing industry where a high quality weld is not only required but is part of the overall design. However the process is slow compared with other forms of welding  and requires great skill on behalf of the welder as he has to co ordinate using both hands and a foot to control temperature.

MIG Welding 

 Also referred to as Gas Metal Arc Welding it is probably the most common of welding processes. Consisting of a continuous wire spool fed through a hand held gun the speed is preselected by the welder. The MIG Welding machine has to be setup correctly along with the correct choice of shielding gas which is fed through the same hand gun to surround the welding process. Once this is mastered the welder can produce consistent high quality welds in a variety of materials and at a reasonable speed.  It is faster than TIG welding and cleaner than stick welding making it the first choice for a range of projects.

Our Certificates

You can view or download our coded welding certificates here.

Welding Procedure Qualification Certificate

Welder Qualification Test Certificate