What are the materials of petrochemical pipelines

Common materials for petrochemical pipelines include metal and non-metal categories:

Metal materials: mainly including the following types:

Carbon steel and alloy steel: such as carbon steel pipes, low-alloy steel pipes, and alloy steel pipes, suitable for general transportation scenarios, with low cost but limited corrosion resistance.

Stainless steel: grades such as 304, 316L, etc., have excellent corrosion resistance and high temperature strength, and are commonly used for transporting acidic and alkaline media or clean fluids.

Nonferrous metals: such as copper pipes, aluminum pipes, and titanium pipes. Copper pipes have good heat transfer performance, aluminum pipes are acid resistant but not alkali resistant, and titanium pipes perform outstandingly in highly corrosive environments.

Special alloys, such as Hastelloy, belong to nickel based alloys and are suitable for extremely corrosive media, such as handling strong acids or solutions containing chloride ions.

Non metallic materials: mainly including the following types:

Plastic pipes, such as polyethylene (PE), polypropylene (PP), and ultra-high molecular weight polyethylene (UHMW-PE), have good corrosion resistance, lightweight, and easy processing characteristics, but have low strength and heat resistance, making them suitable for low-pressure and low-temperature environments.

Composite material pipeline: such as fiberglass reinforced plastic (FRP) pipeline, which is composed of resin and fiberglass composite, has both corrosion resistance and leakage resistance, and is commonly used in underground or chemical corrosion environments.

Other non-metallic materials, such as rubber pipes and ceramic pipes, have good flexibility but limited pressure resistance, while ceramic pipes have strong corrosion resistance but are brittle, and are often used for specific auxiliary pipelines.