How to design a hydrochloric acid storage tank at atmospheric pressure?
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This post was last edited by Ye Tang Zhang Shang on 2019-4-4 at 11:43. According to HG20660, hydrochloric acid is classified as a highly hazardous substance; what considerations should be taken into account when selecting and designing storage tanks under normal pressure? What about sulfuric acid (extremely hazardous) or other media that are hazardous at normal pressure and under extremely high pressures? How should it be considered then? Glass fiber reinforced plastic cannot be used for media that pose extreme hazards, so what material should be used then?
For normal pressure and highly hazardous media, it is recommended to manufacture in strict accordance with the requirements specified in GB150.
This post was last edited by Glass Fiber Reinforced Plastic Products_GPQC on 2019-4-4 at 11:23. Glass fiber reinforced plastic is a good option – you can rest assured that it has excellent acid resistance. We have used many glass fiber reinforced plastic tanks for over ten years. However, due to strict environmental regulations, enclosures must be built around these tanks, and anti-corrosion measures are also required inside those enclosures. Feel free to contact me if needed. 15013287991 WeChat and phone number
It’s possible; there are too many fiberglass containers used for storing hydrochloric acid. :)
Dilute sulfuric acid is acceptable, with a concentration of less than 75%; concentrations above 75% are too much for fiberglass, and composite tanks with PVC or PVDF linings (for high temperatures) are required
The material should be selected reasonably based on concentration, temperature, and economic benefits.
HG20660 is a toxicity classification. What I mentioned regarding temperature applies, while concentration is relevant to the choice of materials. These are two different concepts. For the same material, the corrosion rate varies at different temperatures and concentrations. Therefore, materials must be selected in a specific medium environment, taking economic benefits into account as well. For example, using a more expensive material would result in a cost of 1 million over 10 years. Using a similar material, the cost over 5 years is 200,000.
This post was last edited by yechao25038 on 2019-4-7 09:52. The material selection is primarily based on corrosion resistance; refer to the \"Corrosion Data and Material Selection Manual\" considering temperature and concentration； In terms of design, due to the extremely high level of hazard, it cannot be designed as a steel pressure vessel at normal pressure; my approach was to set the design pressure at 0.1 MPa and to design and manufacture it according to standards for 150 pressure levels.
I can only say that the hydrochloric acid tanks I’ve seen under normal pressure are all made of fiberglass; as for sulfuric acid, it depends on its concentration!