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Liquid air separation plant Integrated Utilisation Project 

Liquid air separation plant Integrated Utilisation Project 
Nov 18, 2025
Author: DEAR AST

The liquid air separation plant uses circulating nitrogen to absorb the cold end of LNG, thus replacing the traditional hot and cold end expanders of the liquid air separation plant. The liquid air separation plant energy consumption is reduced by using glycol aqueous solution closed circuit to absorb the cold at the high temperature end of LNG, thus replacing the traditional cool water tower with lower cooling water temperature and less water consumption. The key of the liquid air separation plant, a low temperature nitrogen press, reduces investment costs while supporting the localisation of this liquid air separation plant and enhancing domestic equipment.

Dear Air Separation creates a corporate brand of high-quality, energy-saving small air separation unit and large air separation unit and liquid air separation plant and constructs an advanced business philosophy and management model.

上海宝冶集团有限公司-7500(2)

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Pressure test before valve installation 1. In the warranty period, those with the certification and the sealing surface is intact can no longer conduct the strength test alone, but only the air tightness test can be taken before installation. 2. Within the warranty period, it has the certificate, and its sealing surface has defects such as corrosion and damage. After treatment, it must carry out the air tightness test. 3. Outside the warranty period, those with certification and intact sealing surface shall be subject to air tightness test before installation. 4. For valves that need to be degreased and disassembled on site, air tightness test shall be conducted separately before installation. 5. The safety valve shall be sent to the local quality inspection department of the project for verification before the end of installation and commissioning.
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