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Type: Artigo de periódico
Title: Influence of preheating on API 5L-X80 pipeline joint welding with self shielded flux-cored wire
Author: Cooper, R
Silva, JHF
Trevisan, RE
Abstract: The present work refers to the characterization of API 5L-X80 pipeline joints welded with self-shielded flux cored wire. This process was evaluated under preheating conditions, with an uniform and steady hear input. All joints were welded in flat position (IG), with the pipe turning and the torch still. Tube dimensions were 762 mm in external diameter and 16 mm in thickness. Welds were applied on single V-groove, with six weld beads, along with three levels of preheating temperatures (room temperature, 100 degreesC, 160 degreesC). These temperatures were maintained as interpass temperature. The filter metal E71T8-K6 with mechanical properties different from parent metal was used in undermatched conditions. The weld characterization is presented according to the mechanical test results of tensile strength, hardness and impact test. The mechanical tests were conducted according to API 1104, AWS and ASTM standards. API 1104 and API 51 were used as screening criteria. According to the results obtained, it was possible to remark that it is appropriate to weld API 5L-X80 steel ducts with Self-shielded Flux Cored wires, in conformance to the API standards and no preheat temperature is necessary.
Subject: API 5L-X80
flux cored wire
mechanical properties
Country: Espanha
Editor: Cenim
Citation: Revista De Metalurgia. Cenim, v. 40, n. 4, n. 280, n. 287, 2004.
Rights: aberto
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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