Which Pipelines Should Transport Corrosive Media Such As Sulfuric Acid and Hydrochloric Acid?

Sulfuric Acid and Hydrochloric Acid Pipeline

When transporting corrosive solid media such as sulfuric acid, hydrochloric acid, and hydrofluoric acid, the choice of conveying equipment is particularly important. A little careless leakage or leakage can easily lead to safety accidents, resulting in the loss of enterprise property and personnel safety. hazard. The main models of better sulfuric acid pumps and hydrochloric acid pumps are PVDF fluorine-lined centrifugal pumps, PVDF magnetic pumps, and self-priming pumps.

When it comes to the pipelines used in transportation, it is easily overlooked by many production enterprises. However, the importance of channels is not lower than that of pumps and storage tanks. They all occupy a significant proportion of the entire transportation process—a minor oversight. Common pipes and valves are mostly made of metal. Still, the life of metal materials is not very long in use. If the pipeline is lined with polytetrafluoroethylene, You can significantly improve its service life, corrosion resistance can be increased, and leakage, leakage, and other phenomena that endanger production safety can be reduced.

Under normal circumstances, the ball valve is lined with F4. The valve stem is made of metal rod and composite, and the seals are mostly F4. The operating temperature of this valve can reach -60℃-+160℃, and the working pressure can reach 10kg/cm2 and 20kg/cm2.

In the diaphragm valve, the material can be made of F4, compounded with F4, or compounded with F4 glass varnished cloth and F4. This diaphragm is mainly used in metering and control instruments.

F4 bellows is also an indispensable anti-corrosion supporting part in the chemical industry. As a connector for corrosion-resistant pipelines, it mainly absorbs the changes in pipeline length caused by thermal expansion and contraction. It has the advantages of rigid and brittle channels. Dislocation connection, so it is widely used in various high-temperature corrosion environments.

To improve the performance of the bellows, You can also reinforce the outside of the pipe with metal rings, metal sleeves, or wire braids. A corrugated tube with a diameter of 75 mm made by cutting and braided with stainless steel wire on the outside shows the characteristics of long-term use without aging under high temperature and high pressure in the test application. It is installed on the high-pressure superheated steam pipeline of the power plant. After continuous use for 17,700 hours under steam pressure of 28 kg/cm2 and temperature of 250 °C, it has been subjected to an aging test in the atmosphere for six years. Signs of aging. Its mechanical properties remain:

Transverse: tensile strength 243kg/c㎡ elongation 333%

Longitudinal: tensile strength 165kg/c㎡ elongation 267%

But one thing that is easily overlooked is that pipes, valves, and pumps lined with fluoroplastics or polytetrafluoroethylene cannot transport media with too many solid particles or crystals. If there are too many particles, it will quickly lead to the impeller in the pump. If it is burned out, if you need to transport a medium with too many particles, you must choose another type of pump - a mortar pump.