National Day festival period, tianjin zhongwang aluminum co., ltd. to make full use of the "11 · 1" shutdown opportunity.From September 30, 2016 to October 6, 2016, the company's electrical and power department, production plants, safety and environmental protection department, participating units and other maintenance personnel gave up the holiday and family reunion, and devoted themselves to the maintenance line, working day and night, the natural gas pipeline for comprehensive and meticulous maintenance and reconstruction.The purpose is to ensure that the equipment in good condition, to ensure that this winter, spring production and operation.

  The maintenance of the project is mainly for line 1 annual maintenance of natural gas and line 2 gas main valve with gas mouth installation.In order to complete the holiday overhaul work, tianjin zhongwang aluminum co., ltd. deputy general manager li qingjiang repeatedly convened the relevant departments maintenance balance meeting, the maintenance project time arrangement, responsible units and safety measures to arrange.

  In the process of this construction, on the premise of ensuring safety, zhang yong, the senior engineer of the company's gas, relying on years of experience, adopted the method of direct replacement to carry out the construction, which saved the construction cost for the company, and was highly evaluated and unanimously recognized by the relevant leaders of the company.

  In the construction site, li qingjiang deputy general manager, wang weiliang chief power division and other company leaders personally command, carefully check each step of the construction process, in the premise of ensuring the quality of the project, use the only time to complete all the maintenance and reconstruction work.

  In the final construction stage, the last weld welding, the weather suddenly changed, sudden rain, the leaders saw this scene on the face of a pleased smile, can not help but sigh: is the right place at the right time and help tianjin zhongwang.

  Through our joint efforts, as of October 6, the company's "11 · 1" gas maintenance work has been successfully completed.

  Note: there are three replacement methods for gas:

  A. Direct replacement: natural gas is replaced by compressed air, and then compressed air is replaced by natural gas;It requires high technology content and low cost.

  B. Indirect replacement: nitrogen is replaced and a certain amount of nitrogen is injected into the pipeline as a protective gas, and then nitrogen is replaced by natural gas.The technical content is relatively low and the construction cost is high.

  C. Barrier replacement: an inert gas protection wall is set in the middle of two kinds of explosive gases, and then the inert gas is pushed by natural gas, and the inert gas pushes the air;The technical content is relatively low and the construction cost is high.