FF Tank: Both inner and outer layers are made of reinforced fiberglass (fiberglass), featuring a uniformly spaced sandwiched compartment with a leak detector connected to the compartment.

FF Tank: Primarily used for storing fuel oil, diesel, and other petroleum-based liquids.

FF double-wall tank: Inner and outer tanks are made of glass steel structural walls. Features: Rust-proof, reinforced ribs, thick-walled structure with high external pressure resistance, interlayer can be pressurized and leak tested, dry or wet leak testing system, no need for cathodic protection, no need for high-voltage pinhole testing. Leaks can be repaired and used again, tank is lightweight, easy to install, high price.