Processing requirements for industrial large-scale storage tank equipment
As a core equipment in industries such as chemical, energy, and food, the processing quality of industrial large-scale storage tanks directly affects operational safety and service life. The following are the key processing requirements:
1. Material selection and anti-corrosion treatment
The material of the tank body should be selected according to the characteristics of the storage medium, such as carbon steel suitable for non corrosive media under normal pressure, stainless steel or composite materials used in strong acid and alkali environments. Surface treatment requires sandblasting to achieve Sa2.5 standard, and anti-corrosion coatings such as epoxy resin and glass flakes should be used. The coating thickness should comply with the design specifications (usually ≥ 300 μ m) to ensure weather resistance and chemical stability.
2. Structural strength and welding process
The design of the tank body requires verification of stress distribution through finite element analysis, and the wall thickness is determined by calculation based on pressure, temperature, and medium density. Welding shall be carried out using automatic submerged arc welding or argon arc welding, and the weld seam shall undergo 100% radiographic testing (RT) or ultrasonic testing (UT) to meet the JB/T4730 standard level II or above. Key areas such as manholes and connecting pipes need to be reinforced with steel bars to prevent local stress concentration.
3. Sealing and safety design
The top of the tank is equipped with a breathing valve and a flame arrester, and the pressure release device needs to be calibrated according to API 2000 standards. The flange connection adopts HG/T20592 standard, with a sealing surface accuracy of Ra3.2 μ m, ensuring no leakage. Set up a sewage outlet and anti settling groove at the bottom for easy maintenance and cleaning.
4. Inspection and acceptance standards
After processing, a hydrostatic test (1.25 times the design pressure) is required, and the pressure should be maintained for 30 minutes without leakage. The supporting instruments (level gauges, temperature sensors) need to pass metrological certification, and the overall equipment meets the requirements of GB/T19001 quality management system.
