(1) manhole. Horizontal tanks buried tanks or repair personnel access and ventilation exhaust, its diameter is about 700mm, usually installed on manhole covers have the amount of the hole, a variety of other tank attachment snorkel and out of the oil pipelines, manhole top manhole no action and protection.

(2) the amount of hole. For measurement, sampling and observation. Aluminum production has dedicated volume tank, to prevent the next ruler spark with sealing groove hole under the hood and embedded rubber gasket to seal oil and prevent the impact generated when the manhole cover off the cremation. And some amount of hole with steel sleeve copper cap (cap) form, mainly copper lid sealed with weight and gaskets.

(3) vent (breathing tube). For unloading oil tank oil vapor discharge tank and intake air when filling oil.

(4) gas-permeable cap. Tank of gas station equipment is installed at the top of the tank ventilation. When the thermal expansion of the oil tank or unloading, that is breathable out by Fire pattern plate. When transporting the oil tank outside, the air inhaled through the corrugated board and prevent the fire from this source by ensuring tank safety.

(5) and the door bottom valve. Also known as a one-way valve or check valve installed in the tank outlet pipe nozzle from the tank bottom should not be less than 0.15mm used to prevent oil tanker not reflow when the suction from the pipe into the tank and tanker.

(6) quick connector. Car must be enclosed unloading mode, unloading pipe and oil cystatin inlet connection, using fast sealing joints. Quick connectors at both ends of the hose connector that yin and yang. Oil from the tanker was unloading pipe quick connector unloaded into the tank. This connector is easy to operate, rapid assembly and disassembly, reliable, can reduce the oil and gas play, reduce air pollution, is conducive to safety. Common CRJ-type plug-in gas station hose connector assembly.

(7) emergency shut-off valve. Submersible pump with safety valve is used, mounted on the bottom of the pipe the gas station.