Use of liquid chlorine cylinders

The liquid chlorine production department must pay attention to the following aspects. (1) Liquid chlorine cylinders must have all three certificates (namely: the cylinder qualification certificate, the chemical hazard label, and the production license certificate). The cylinder certificate should include information such as the cylinder’s weight, the date of pressure testing, the date of inspection, the name of the inspector, and the date of manufacture of the cylinder ； Chemical hazard symbols are mandatory for all types of chemical products ； The production certificate should include the product inspection date, production date, product weight, and the person in charge of packaging, among other details. (2) For the packaging of liquid chlorine cylinders, electronic scales and automatic overload switching devices should be used as much as possible. Recently, many chlor-alkali companies have adopted DCS distributed control systems, which has greatly improved the safety and reliability of liquid chlorine packaging. The packaged gas cylinders need to be weighed again for inspection ； A negative deviation should be applied to the actual packaging volume of gas cylinders, to strictly prevent any positive deviation from occurring. Since using alloy plugs is a rather complicated process, and moreover in the event that the alloy plug melts during transportation or use, the liquid chlorine inside the cylinder could leak out (which has indeed happened), alloy plugs are no longer used today; instead, stricter controls over the packaging process are employed to prevent overfilling of the cylinders. (3) Regularly clean and pressure-test the liquid chlorine cylinders. Many chlor-alkali companies perform vacuum cleaning on all returned cylinders, ensuring absolute safety in the filling of liquid chlorine. Generally, liquid chlorine cylinders need to undergo pressure testing and technical inspections every 2 years. These inspections include checking the flatness of the outer surface (paint condition), weight loss, residual deformation rate of the volume, hydrostatic testing, and determining the minimum wall thickness. Under normal use, the service life of a liquid chlorine cylinder is specified to be 12 years (starting from the date of manufacture) ； The hydrostatic test pressure for the cylinder is 1.5 times the design pressure, namely 3 MPa. The volumetric residual deformation rate is determined in accordance with the \"Regulations for Safety Inspection of Gas Cylinders\".

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The one on the second floor explained it in great detail. I’ve learned something from it; thanks for sharing

Thank you, second floor. Sincere thanks!