Comparison of Weld Built-up by FCAW and MIG Welding on Damaged Low Cr-Mo Alloy Steel Tube in Boiler Application

Amit Kumar * and Vijayakumar P

Department of Mechanical Engineering, PRIST University, Vallam Thanjavur, Tamil nadu, India.
 
Research Article
International Journal of Science and Research Archive, 2023, 08(02), 492-505.
Article DOI: 10.30574/ijsra.2023.8.2.0243
Publication history: 
Received on 13 February 2023; revised on 22 March 2023; accepted on 24 March 2023
 
Abstract: 
In boiler application low Cr-Mo tubes are being used and in manufacturing or working these tubes are getting damaged. ASTM and ASME BPVC (Boiler Pressure vessel code is allowing wall thinning of tubes by 10%. Any damage more than 10% of wall thickness is causing rejection of Tube. As ASTM and ASME has provision for weld build-up on defected or damaged portion of Boiler Tubes, hence I am going to compare two welding process for the weld built-up on low Cr-Mo alloy steel tubes. In current practice the damaged tubes are being scrapped in boiler manufacturing as well as in running boilers. After this demonstration we can compare mechanical Properties of reworked tubes with original one. The Two methods adopted are MIG Welding and FCAW. Metal Inert Gas (MIG) welding is known for high deposition welding technique will minimum defect possibility. Flux Cored Arc Welding also has high weld deposition rate with minimum defect possibility.
 
Keywords: 
Built-up; SA213T22; MIG Welding; FCAW; Boiler Tubes
 
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