Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Influence of Welding Shapes and Welding Procedures on Fatigue Strength of Small Diameter Branch Welded Pipe Joint

소구경 분기배관 용접부의 피로강도에 미치는 용접부 형상 및 용접공정의 영향

  • 백종현 (한국가스공사 연구개발원 배관연구 센터) ;
  • 김철만 (한국가스공사 연구개발원 배관연구 센터) ;
  • 김우식 (한국가스공사 연구개발원 배관연구 센터)
  • Published : 2003.11.05
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Abstract

S-N fatigue tests were conducted to investigate the fatigue strength of small diameter socket and butt welded joints made of carbon steels. Experimental parameters were pipe diameter, throat depth, shape of socket welds and welding procedure. Filler metals used in SMAW and GTAW procedure were E9016-G with diameter of 4.0 mm and ER70S-G with diameter of 2.4 mm. API 5L Gr.B pipes were adopted as a small diameter branch pipes. All socket fittings were machined from ASTM A105 carbon steel. Tensile strength was not affected by the welding procedure. Fatigue strength in socket weld joints increased with increasing pipe diameter, area of weld metal and weld leg length of pipe side.

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