Cracking is the worst part in welded parts which may lead to catastrophic failure in pressure and structural equipment. That is why quality assurance and quality control plans are implemented, in order to ensure the defects free welds. The cracks appear after the weld deposition cools down and so called hot cracking. Weld Cracking may…
The qualification of a welder is a preliminary concern in Inspection of welding jobs. For this a test weld in conducted to test the eligibility of welder, to make welds on the specific job. After that the test weld is applied for examination which can be non-destructive and destructive. Non-Destructive includes the NDT examination using…
There are so many industries which are working on pipe fabrication using a welding process (including arc welding and friction technologies). For example oil and gas refineries, power plants, pressure equipment and many other industries are utilizing innovative pipe welding technologies. Normally the joining process is carried out in different techniques based on the position…
An arc welding process uses electric power supply to generate arc. There are two of electric power types; one is constant which is known as Direct current while the second one is varying which is called Alternating power supply. Direct Current: In this type, the current travels in one direction only in order to generate…
Well there are normally two types of weld joining which are being used in fabrication industries. One is the groove welding and other one is fillet welding. Groove weld as the name states material is fed to fill the groove created between the joints. While in case of fillet welding, the parts to be joined…
Arc welding is supportive joining method for worldwide steel welding fabrication. Normally all types are being used for manufacturing giant pressure structures, pipelines, buildings. Stainless steel is the most popular material in construction/manufacturing industries. It has the following types based on its micro-structure produced due to the addition of alloying elements. Austenitic stainless steel…
Friction welding technology is popularly used in several range of applications. It is widely used for the joining of non-ferrous materials including aluminum and aluminum alloys, copper and copper alloys etc. The working principle of friction welding includes the principles of friction to produce heat under which the material gets softened and fused to a…
This picture proves that scuba welders are the coolest guys among worldwide professionals. They not only serve the hardest job but also live a friendly environment with deadly marine animals. The above taken, is the picture of strong scuba welder with a giant shark inside the water. The shark is passing by the welding gadget and the…
In this type of welding, a welder with fully equipped scuba, performs welding in severe marine atmosphere. just like there are special people to become a pilot for plane, similarly there are special welders to weld in water. That is why they get well paid for such a hardest job but it is never enough.…
Small Scale welding on pipe of size smaller than your fingers. The pictures depicts a great art work, by the utilization of welding process. There are a lot of small scale welding examples in our every day life one of which, the application of joining in jewelry is very common. The process can be applied…
Women are also working along with men, in the field of welding, world’s toughest job. Also there are some training centers that offer leaning opportunities to women welders. Many women don’t know about welding techniques and options in welding career but this one is the best filed in joining of jewelry (typical women field). Welding…
Gas metal arc welding sometimes called Metal inert gas welding. The process used to produce both structural and pressure welds. This process includes usage of continuous filler wire and additional gas shield supply. Both direct and alternating current systems can be applied. Metal inert gas welding is widely used to weld non-ferrous, aluminum and steel…
In order to fulfill quality control requirements, fabrication industries organize inspection plans to ensure efficient and quality weld results. For this weld components are examined under series of inspection steps and tests. A welding inspector is required to ensure whether the weldment is free fro defects or not. Imperfection in welding is any abnormality or…
In steel welding industries, the process of of examining the weld surface cracks with the help of penetrating dyes and fluid. In this technique the flowing principle of fluids are applied to determine the presence of defects in the weld surface. The chemicals used are either colorant dyes or fluorescent sprays. The process involves the…
Welding may induce unwanted stresses in material that may cause cracking failure during service. Due to thermal gradient offer by the heat of welding, the material gets hardened. For this heat treatment is applied after welding that is why it is termed as post weld heat treatment. Post weld heat treatment offers a number of…
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