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Development of JWES Standard WES7700 for Repair Welding of Pressure Equipment

[+] Author Affiliations
Takayasu Tahara

T&T Technology, Saitama, Japan

Takahisa Hoshika

Sumitomo Chemical Co., Ltd., Chiba, Japan

Eiichi Yamamoto

Eishintechno, Fujisawa, Japan

Takushi Murakami

Sumitomo Heavy Industries Process Equipment Co., Ltd., Ehime, Japan

Keisuke Shiga

Shinko Plantech Co., Ltd., Yokohama, Japan

Yukio Hirai

Lloyd’s Register, Japan, Yokohama, Japan

Yasushi Ogayu

Idemitsu Kosan Co., Ltd., Chiba, Japan

Fumiyoshi Minami

Osaka University, Osaka, Japan

Paper No. PVP2013-97254, pp. V007T07A011; 11 pages
  • ASME 2013 Pressure Vessels and Piping Conference
  • Volume 7: Operations, Applications and Components
  • Paris, France, July 14–18, 2013
  • Conference Sponsors: Pressure Vessels and Piping Division, Nondestructive Evaluation Engineering Division
  • ISBN: 978-0-7918-5573-7
  • Copyright © 2013 by ASME


The Japan Welding Engineering Society (JWES) published the guideline for repair welding of pressure equipment, CP-0902 in 2009. Considering the regal approval of each repair welding procedure for pressure equipment, JWES WES7700 has been also published in 2012. This paper summarizes the contents of WES7700 along with a verification of repair welding procedures such as minimum required grind out thickness for thermal removal of flaws, minimum required throat thickness of fillet welds for patched plates by experimental pressure tests and FEM analysis and some comparison of the requirements of several stamdards for repair weldings.

Copyright © 2013 by ASME



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