Underground Storage Tank


Underground Storage Tank (S&F DOUBLE-WALL TANK)


S&F Double ‒ wall Tank is a truly innovative product; it has a double ‒ wall structure consisting of a primary steel tank and a secondary FRP tank, and it is equipped with sensor for monitoring leakage. The seamless secondary FRP tank is manufactured using our advanced spray-up technology. ※FRP: Fiber-reinforced plastic 


Excellent in Economy, Safety and Quality



1.Automatic production makes prices reasonable.

2.Reduced construction costs and construction time due to elimination of a tank room



1.Constant leakage monitoring

2.Primary steel tank is leak proof by pressure test·        

3.Secondary FRP tank is KHK (Hazardous Materials Safety Techniques Association) certified·        

4.Capable to store alcohol blended fuels



1.Measurement of tank wall thickness, pinhole check, water/air pressure and decompression test are conducted to ensure high performance.·        

2.Highly durable FRP thickness·        

3.Pressure control throughout the installation·        

4.ISO9001 quality control


Leak monitor

Leakage due to corrosion of the steel layer is detected before it causes soil contamination.



Standard Specifications

Please see features for details.

SUS (Stainless steel)

Stainless steel underground tanks for various solvents storage. 

These tanks have excellent durability and corrosion resistance, and they are suitable for liquids where quality preservation is specially emphasized.

With combination of SUS material and our double wall tank technology, we can offer enhanced safety and reliability.

*We can also handle acid pickling, degreasing, and buffing of the inner surface of tank according to your requirement. 



▌Super SF Double Wall Tank

Advanced tanks made by adding value to the conventional tanks



Corrosion treatment inside of the tank After using the primary steel tank for several years, despite of all efforts, water will accumulate due to the condensation and other factors, and dissolved oxygen contained in the water will cause rusting to the bottom surface of the primary tank. Furthermore, if there is any difference in the concentration of dissolved oxygen in water due to sediments or others inside the tank, corrosion may increase due to galvanization on the borders of these areas of concentration. Our super SF double wall tank solves this problem. After abrasive treatment the bottom of primary tank 1.5 mm thick FRP layer is applied to the area. This fully eliminates the concern of inner surface corrosion due to water retained at the bottom of the primary steel tank.



▌Interior White Epoxy Coating Tank 

Interior white coating provides excellent water resistance, solvent resistance and chemical resistance. 

It is used as the interior coating of tanks for aviation fuel, where safe operation is the utmost priority. In recent years, from the importance of emergency situations, more and more local governments have been introducing helicopter ambulances and rescue helicopters.In addition to our reliable tank technology, we also apply white epoxy coating that doesn’t affect the jet fuel on the entire inner surface of the tank, based on the “Guidelines for the Handling of Jet Fuel” issued by Petroleum Association of Japan.This coating is also compatible to a wide range of fuels and various solvents. 



▌Dimensional data


Comparison between SF Tank and FF Tank

SF double wall tank is made of steel and excels at physical strength.There are no concerns of external corrosion and it is completely safe→Especially, in Japan where earthquakes occur frequently, you can rely on it because of its proven record.

  SF tank FF tank  
Earthquake resistant strength Steel products are strong (proven from past records) Weaker than the steel products
Strength of nozzles for piping connection purpose Strong due to its unitary structure with the steel tank. Attached by secondary adhesion
Special care needed for handling
Cathodic protection measures not necessary not necessary
Waste Disposal Main body is recyclable Cut the whole into 10cm2 pieces and dispose as industrial waste.
Applicability to biofuel (alcohol) Applicability to biofuel (alcohol) Consideration is needed for the use of biofuel


(Note) The U.S. made FF double wall tank can handle alcohol-blend fuels due to ingenious plastic grade and tank structure. (UL-approved)


TK Support (tank saddle)

It is a safety structure where load is received at the tank bottom, and it is fitted to the tank shape by factory prefabrication.

Construction work of foundation period can be shortened about 3 days, and construction work cost can also be reduced.

Note) This option might not be permitted by some of the fire offices. Prior discussion with local fire office is recommended.

You can enlarge the photograph by clicking it. 


▌SF double wall Pipe

・Excellent work efficiency at site

SF double wall pipes are used in the connection between aboveground vent pipes and underground pipes, and they offer excellent work efficiency without requiring any welding work at the site.

・Tightness Inspection during construction as well as after construction

You can continuously monitor any leakage of liquid from pipes, and you can inspect it during construction as well as after construction has been completed.

・Quality stability due to factory prefabrication

SF double wall pipes are manufactured in integrated manner in a fully controlled plant. Therefore, products have consistent quality without any deviation.

▌Submergible Turbine Pump

Economic efficiency

・By moving the pump motor with built-in dispenser to the inside of the underground storage tank, it reduces the total cost of fuelling facility.

・high efficiency submergible motor produces higher discharge rate and discharge pressure.      


・When leakage is detected in pipes, a controller shutdowns the motor or limits discharge rate in minute amount.·        

・It stops the current supply when overheating of pump motor is detected.·        

・When inventory reaches minimum set volume, the controller stops the motor to prevent idle operation. ·        

・In the event of detection of overload, overcurrent, or voltage leakage of pump motor, emergency stop of motor will be triggered.·        

・Relief valve is with built-in check valve protects dispenser and pipes in the event of abnormal high pressure.·        

・Air bubbles in oil fuel are collected in manifold and returned to the tank.·        

・Fuel always circulates in the motor, this cools down and lubricate the motor, and ensures its long life. 


・Submerged pump can have 30 meters head (gasoline column) capacity, and pipe length up to 60 meters between underground tank and dispensers, allowing greater flexibility in design layout and burial construction work.

・Pump motor can be easily replaced without removing fuel pipe and electrical conduit. 

Manufacturing Process

01. Bending
01. Bending   02. Interior welding      03. Exterior welding
04. Nozzle mounting 05. Hydrostatic inspection 06. Abrasive treatment by shot blasting
07. Application of top coat on exterior 08. Film thickness measurement/ 09. Pin hole inspection

PMF Construction Equipment Co., Ltd.

Yangon Office Address :

No.74,Lann Thit Road,Nant Thar Kone Ward, Insein Township,Yangon.

Tel : 01-640080

Hot Line : 09-402 668668,09-402 668600

Email : enquiry@pmfcss.com

Copyright PMF Construction Equipment Co., Ltd
Powered By : NewWorth Web Development