Experimental Study for the Reinforcement of District Heating Pipe

지역난방 열배관 강화를 위한 실증시험 연구

  • Kim, Jaemin (Dept. of Mechanical Engineering, Inha Univ.) ;
  • Kim, Jooyong (District Heating Technology Research Institute, Korea District Heating Corp.) ;
  • Cho, Chongdu (Dept. of Mechanical Engineering, Inha Univ.)
  • 김재민 (인하대학교 기계공학부) ;
  • 김주용 (한국지역난방공사 지역난방기술연구소) ;
  • 조종두 (인하대학교 기계공학부)
  • Received : 2014.11.17
  • Accepted : 2015.12.14
  • Published : 2016.03.01


In this study, an alternative bend design is proposed to overcome the aging problem in piping bends. In this design, the foam pad is not included. Finite element analysis was performed based on the total pipe diameter. From this analysis, the shape of the Shear Control Ring (SCR) was determined. Temperature, stress, and other data of the proposed reinforced pipe were acquired and analyzed after the test was performed. The value of the thermal stress for the reinforced steel pipe satisfied the required standard without the foam pad based on the manufacturing of the reinforced fitting and construction site of the test. The reinforcement provided a shear strength level for the foam pad that resulted in maximum shear stress less than stress based on the original foam pad applied at the pipe bend. Additionally, an increasing factor of safety effect for the reinforced fitting application was discovered.


District Heating Pipe;Finite Element Analysis;Shear Control Ring;Reinforced Fitting;Taguchi Method


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