International Journal of Oil, Gas and Coal Engineering
Volume 6, Issue 4, July 2018, Pages: 44-49
Received: Jun. 5, 2018;
Accepted: Jun. 26, 2018;
Published: Jul. 24, 2018
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Zhijian Wang, China National Petroleum Offshore Engineering Co, Ltd, Qingdao, China
Yanyan Li, China National Petroleum Offshore Engineering Co, Ltd, Qingdao, China
Chiaming Chang, Research and Development Department, Kuanuang Tai Metal Industrial Co., Ltd, Tainan, Taiwan
The representative materials, used in Russian Yamal LNG project, are ASTM A333 Gr.6 (low temperature carbon steel, designed temperature of –50°C) and ASTM A312/A358 TP304/304L (austenitic stainless steel, designed temperature of –196°C). The welding technical specification demands TIG (Tungsten Inert Gas) welding for root welding of piping. This project adopts the construction way of prefabrication in Qingdao and assembly in Russian. Therefore, high construction accuracy is required. This article introduces the LNG process piping welding by automatic TIG welding which contains welding process design, welding process parameters, test and analysis of weld mechanical property and advantage analysis of TIG welding as well. In this project, the automatic and high efficient TIG welding is used for the root welding and hot welding of low temperature carbon steel and austenitic stainless steel piping. The result shows that the mechanical properties of weld metals meet the requirements of LNG project technical specification and code ASME B31.3. The efficiency of automatic TIG welding increases 2 times compared with conventional manual TIG welding. The automatic TIG welding improves and optimizes the quality and construction progress of the LNG project process piping.
Application of Automatic TIG Welding for Yamal LNG Process Piping Fabrication, International Journal of Oil, Gas and Coal Engineering.
Vol. 6, No. 4,
2018, pp. 44-49.
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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