Seeking advice on corrosion margin for liquid chlorine storage tanks
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I just started working at a new company. The company purchased a new liquid chlorine storage tank last year, with the following specifications: total volume V=32m3； Operating pressure: 1.4 Mpa, design pressure: 1.54 Mpa ； Operating temperature: -34.5°C/50°C, design temperature: -38°C/55℃ ； Filling coefficient 0.85 ； The designed service life is 15 years. The wall thickness of the cylinder is 20 mm, with a corrosion margin of 3 mm. Medium: Dry liquid chlorine, with a water content of ≤0.04%. Refer to the corrosion manual – the corrosion rate for dry liquid chlorine is between 0.05 and 0.5 mm/year. According to section 2.3 of the document \"Safety Facilities and Design for Liquid Chlorine Storage Areas\", the corrosion allowance should be ≥4 mm. I would like to ask whether the corrosion margin designed for this pressure vessel is appropriate, and which codes and standards should be used as a reference?
According to the information you provided, the corrosion margin for the liquid chlorine storage tank is 3 mm, whereas section 2.3 of the reference document \"Safety Facilities and Design for Liquid Chlorine Storage Areas\" states that the corrosion margin should be ≥ 4 mm. Therefore, there is a problem with designing the corrosion margin. The reference work “Safety Facilities and Design for Liquid Chlorine Storage Areas” is an industry standard and cannot be used as legislation or regulations. It is recommended to refer to and use relevant standards such as the **Safety Technical Regulations for Pressure Vessels** and GB150 \"Pressure Vessels\" for design purposes. .
It also depends on the material and the medium temperature; all these factors play a role. 18606205032, let’s get in touch and communicate