Abstract
This paper presents the systematic approach of design, fabrication of a semi-automatic welding fixture for circumferential joining of cylinders and testing the welded samples obtained. The TIG welding unit is used to make a circumferential joining on tank and piping, which are fixed onto the welding fixture and several parameters such as the setting of voltage, current and travel speed (rotational speed) is used for fabrication setup. The fabrication fixture with a constant rotation speed is obtained by revolving the tank or pipe with an electrical adjustable speed control motor. The report is focused on the welding of the aluminum workpiece using TIG welding. The joint of mechanical properties is determined by a static tensile test, impact test, and hardness test. This fixture, all the parameters can be determined, and it's an easy way to get the constant shape of welding joint at all joining by using the welding fixture, the evaluation by determination of joining quality can easily be used, especially for circumferential joint on tank and piping with a cylindrical shape.
Highlights
A standard tank and piping are a product with a cylindrical shape designed to hold gases or liquids at a pressure substantially different from the ambient pressure
Welding joint The workpiece is being cut using the specimen cutter provided at USM Nibong Tebal, and the result of the quality welding by multiple settings on the Tungsten Inert Gas (TIG) welding unit is analyzed
The voltage and travel speed can be regulated for the welding test, but the amperes are automatically determined by the welding unit itself, which depends on the arc length and voltage selected
Summary
A standard tank and piping are a product with a cylindrical shape designed to hold gases or liquids at a pressure substantially different from the ambient pressure. The pressure differential is potentially dangerous, and many fatal accidents have occurred in their development and operation (Ahmad et al, 2020). Their design, manufacture and operation are regulated by engineering authorities backed up by-laws. To apply a welding process for standard tank fabrication, the cylinders of the tank are usually made from flat plates, which are rolled and welded along longitudinal joints. Weld types are usually different for longitudinal and circumferential joints, and the joint stresses in a tank must satisfy the requirements (Gottlieb et al, 2010)
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