Repair Welding and Surface Welding, part 2
Repair welding is that type of welding that multiprocess welders perform when they want to make a certain item safe again and bring it back to its satisfactory operating condition. Sometimes the experienced arc welder can allow himself the so called alterations.
The alterations are the changes that the commercial welder can do to the pressure vessel, which will change its original design. These alterations are usually done when the manufacturer has presented a certificate authorization issued and validated by ASME. The alterations that the stick welder makes should always comply with the code section to which the original boiler or the pressure vessel was constructed.
The commercial welders do need to get a written repair procedure for making the alterations or doing the repair work. If the welder will perform an alteration, then a record has to be made and the alteration work has to be approved. The alteration records are usually filed with the jurisdictional agency or the inspection agency, by the Pressure Vessel Inspectors or the National Board of Boiler.
Naturally, the alterations have to be inspected later as well. This is especially valid when the TIG welders are performing alterations on ships, bridges and large steel frame buildings. Such alterations must be approved and the welders must have the required qualifications, while after that the work must be inspected. All welding procedures to be performed need to be approved in writing in advance.
When the commercial welders take the decision to organize a weld repair, they have to establish why the part that needs to be repaired failed. This is associated with the type of the repair job. There are several reasons why a certain part has failed and they might include an accident or abuse, an overload or a misapplication. Sometimes the MIG welder has the chance to return a certain part, where it can be repaired or reinforced. If the item has been made of an incorrect material or with poor design, that part should be returned to its original design and so on.