What material is suitable for gas supply pipes in areas with high corrosivity?

When selecting the material for gas supply pipes in highly corrosive environments, their corrosion resistance must be taken into account to ensure the safety and long-term stable operation of the pipes. Here are some pipe material options suitable for corrosive environments: 1. Stainless steel: Specifically, austenitic stainless steels containing nickel and chromium (such as 304 and 316 stainless steel) exhibit good corrosion resistance and are suitable for use in various environments with corrosive substances. 2. Duplex stainless steel: It possesses excellent mechanical properties and corrosion resistance, making it suitable for use in environments containing corrosive substances such as chloride ions. 3. Nickel alloys: such as Hastelloy and Monel, etc. These alloys possess extremely high corrosion resistance and can be used in extreme operating conditions, such as environments with strong acids or strong bases. 4. Titanium and titanium alloys: They possess excellent corrosion resistance, making them particularly suitable for use in seawater as well as in various chloride- and oxide-containing media. 5. Plastics or rubbers: Materials such as polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and various rubbers (such as nitrile rubber, fluororubber, etc.) are also excellent corrosion-resistant materials, showing good resistance to a wide range of chemicals. 6. Fiberglass Reinforced Plastic (FRP): A plastic reinforced with glass fibers, it features low weight, high strength, and corrosion resistance, making it particularly suitable for use as piping in corrosive environments. When selecting materials, a comprehensive evaluation should be conducted based on factors such as the type, concentration, temperature, and pressure of the corrosive medium; factors like installation and maintenance costs, as well as the availability of the materials, may also need to be taken into consideration. In cases with special requirements, it is also recommended to consult material science experts or pipe manufacturers for more detailed advice on material selection. .

This post was last edited by sun_fm on 2023-12-7 at 16:51. Carbon steel coated with zinc or stainless steel can be used for main pipes, trunk pipes, and branch pipes. Stainless steel is recommended for use downstream of air supply ball valves; nylon, PVC, copper, or stainless steel/copper pipes with PCV coatings can also be used

Then stainless steel is the only option; acidic carbon steel definitely won’t last long