Capacity, storage tanks for liquefied gas propane-butane LPG underground from the manufacturer

Capacity, storage tanks for liquefied gas propane-butane LPG underground from the manufacturer

LPG underground tanks

Underground storage tank for gas, and ground, are single-walled and double-walled. Area of application double wall gas tanks ― automotive gas stations. Gas single-walled tanks are used at gas stations outside the pale of settlements, CSR, warehouses of fuel and gas tanks for individual gas supply. A distinctive feature from aboveground storage tanks for storage of LPG is the presence of waterproofing highly reinforced type name in accordance with GOST 9.602-2005 "unified system of protection from corrosion and ageing. Underground constructions. General requirements for corrosion protection". Fitting of a tank for gas generally located at the neck of the tank, rarely on the body of the vessel. Underground LPG tanks have a neck height of 500 mm, because deepened to a depth of not less than 500 mm from the top of the shell.

Requirements for liquefied gas tanks

Tanks for liquefied gas used at hazardous production facilities (HPF) are subject to mandatory registration in the territorial bodies of Rostechnadzor. Each gas tank has a certificate of conformity, permit of Rostekhnadzor and the passport of the established sample, which contains data about the manufacturer, materials testing, design and calculations (strength of the product, the capacity of the safety valve, the calibration table). The LPG tanks have at least one technological hatch for their domestic periodic inspection and fitting for installation of Instrumentation, valves and relief valves. The class of sealing devices that protect against pressure increase, should not be below "A".

Delivery of liquefied gas into storage tanks located at gas stations and gas tanks from independent gas supply is carried out by road tankers and semi-trailers tanks for transportation and short storage of propane-butane mixture.

Manufacture of LPG tanks

Production of LPG tanks consists of the following main stages:

• The manufacture of an elliptic bottom. For the production of tank bottom steel is somewhat greater thickness than the main body of the vessel (shell). This is necessary because the bottom is made elliptical by deforming (squeezing) on the press blanks for the bottom. In the deformation process, the metal becomes thinner and comes to the thickness required to provide the estimated strength capacity for gas.
• Processing of the bottom of the gas tank after pressing. After receipt of the elliptical bottom of the required geometry, it process on kromko-strugaling the machine for receiving the edges required for further joining with the sidewall.
• The manufacture of the shell of the tank for liquefied gas. After removing the batch sizes of the bottoms of them distributed in pairs closest in diameter to each other. Under this diameter is cutting the tiles for the shells. To get a shell of the required diameter, the steel sheet is bent between the rollers to receive the cylinder, and welded the edges between them a longitudinal seam. Several such shells welded together by circumferential welds to obtain the required vessel hull length. Longitudinal welds on shells displace relative to each other in a checkerboard pattern.
• The body Assembly of the tank of LPG. By welding the bottoms to the opposite ends of the shell receiving the housing of the reservoir for gas storage.
• Assembly of the tank of LPG. Final Assembly of the tank is in fabrication and welding of supports, manholes, or manhole, fittings.
• After fabrication of the tank for liquefied gas, it is subjected to a hydraulic test of water pressure above 1.5 times its working pressure.
• Final processing of the LPG tank. Final processing of the gas tank is scraping, sandblasting, painting or coating insulation extremely reinforced type underground tanks for storage of LPG.

Characteristics of LPG tanks

FeatureIndicatorWorking давление1,6 (1,57) Euroscene давление1,8 Madalena гидроиспытания2,34 Parubochaya temperature, °SOT -40 to +50Расчетный life резервуара20 lesopolye the annular prostranstvakh