FAQ Category


  • Q What’s the composition of pontoons type internal floating roof?

    A 1 Pontoons
    The pontoon use seamless aluminum pipe which is extrusion molding to make sure its tightness. The design buoyancy is twice over the total weight of the internal floating roof.
    2 combined skeleton
    The skeleton is made of kinds of aluminum profile. The margin plate designed to immerse into the liquid more than 100mm depth.
    3 Vents
    When the press of the oil gas below the internal floating roof comes to 0.01Kgf/cm2, the vents could open automatically to drain the air and oil gas out. When the internal floating roof descend to the lowest position, the vents also could open automatically.
    4 Manhole
    The manhole is designed to open freely to make sure of the installation and the man could go through conveniently. The round of the manhole is sealed with suitable sealing. The nether frame of the manhole should immerse into the liquid more than 100mm depth. The airtightness is very good.
    5 Support Leg
    The support leg is installed under the internal floating roof to make installation and maintaining convenient. The leg is made of seamless aluminum pipe which is placed equality under the internal floating roof. Their load capacity is more than the critical pressure of the internal floating roof and its height could be adjusted freely according to the structure of the tank bottom.
    6 Sealing
    Using which kind of sealing is according to the liquid handled in the tank or the different welding line of the tank wall. Tongue shape and balloon shape sealing are the main style of sealing tape.
    7 Oil Gauge
    The oil gauge is designed and manufactured according to the measuring of the tank. The nether of the oil gauge should immerse into the liquid more than 100mm depth. The upper is the flexible rubber sealing.
    8 Anti-rotation Device
    The anti-rotation device could control the waggle or swing of the the internal floating roof upon the liquid in case the internal floating roof has big rotation and center position shift.
    9 Anti-static Device
    The anti-static device is to output the static from the internal floating roof to the earth to prevent the fire accident due to the static on the internal floating roof which is caused by the loading or unloading of the liquid in the tank.The ground resistance is less than 10Ω.
  • Q What’s the most important parts for loading arms?

    A Swivel joints are precision components for the connection between stationary pipes (or hoses) and rotating parts of machines. The function is the transport or gaseous, liquid or semi-solid substances from and to machines. 
  • Q What’s loading arm?

    A There are three kinds of loading arms: Marine loading arm, truck loading arm, rail car loading arm. A loading arm permits the transfer of liquid or liquefied gas from one tank to another through an articulated pipe system considering or rigid piping and swivel joints to obtain flexibility. Transfer to or from a truck transported tank ot rail transported tank requires a top loading arm or a bottom loading arm.
    A Marine loading arm, also known as a mechanical loading arm, loading arm, or MLA is a mechanical arm considering of articulated steel pipes that connect a tankship such as an oil tanker or chemical tanker to a cargo terminal.
  • Q What’s Coriolis effect principle or the mass flow meter working principle?

    A Coriolis effect is a description of the deviation of a linear motion particle in a rotating system due to inertia relative to the linear motion of the rotating system.
    The mass flow meter is a typical application of Coriolis Effect. It allows the measured fluid to pass through a measuring tube in vibration. The flow of fluid in the tube is equivalent to linear motion. The vibration of the measuring tube will produce an angular velocity. Because the vibration is driven by an applied electromagnetic field, it has a fixed frequency, so the Coriolis effect received by the fluid in the tube is only related to its mass and speed of motion, and the product of mass and speed of motion, that is, the flow velocity is the mass flow rate that needs to be measured, so by measuring the Coriolis effect of the fluid in the tube its mass flow can be obtained.
  • Q How To Choose The Model For Loading Arm?

    A Top Loading rail cars and trucks continue to provide an efficient and cost effective method to load and unload in many situations.
    A loading system should have sufficient horizontal range to reach the farthest compartment without re-spotting the vehicle. Sufficient vertical movement and drop-pipe lengths to service vehicles of varying heights is also necessary. A properly designed top loading system can provide protection and achieve this requirement. Top loading arms can also be used for tight-fill, vapor recovery, marine and other applications when used with specially designed and engineered components, such as vapor plates, tapered hatch plugs, and inflatable hatch seals.
    Special top loading arm designs can also be supplied with a wide range of valves, fittings, and instrumentation equipment.
  • Q What Are The Functions And Advantages Of The pneumatic Ball Valve?

    The Pneumatic Flanged Ball Valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. It only needs to be rotated 90 degrees and the torque can be closed tightly. Ball valves are most suitable for use as switches and shut-off valves, V-type ball valves. In addition to paying attention to the pipeline parameters, electric valves should pay special attention to the environmental conditions used. Since the electric device in the electric valve is an electric mechanical device, its use state is greatly effected by its use environment. Under normal conditions, electric ball valves and butterfly valves should be used with special attention in the following environments.
    Advantages of the Pneumatic Ball Valve:
    1. The fluid resistance is small, and the full-diameter ball valve has substantially no flow resistance.
    2. Simple structure, small size, and light weight.
    3. Close and reliable. It has two sealing faces, and the sealing surface material of the ball valve can be widely used by various plastics, and has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.
    4. It is easy to operate, and it can be opened and closed quickly. It can be rotated by 90° from full opening to full closing, which is convenient for long-distance control.
    5. Easy maintenance, the ball valve has a simple structure, the sealing ring is generally active, and it is convenient to disassemble and replace.
    6. When fully open or fully closed, the sealing surface of the ball and the valve seat is isolated from the medium. When the medium passes, it will not cause erosion of the sealing surface of the valve.
    7. Wide range of applications, diameter from small to a few millimeters, up to a few meters, from high vacuum to high pressure can be applied.
    8. Since the ball valve has wiping property during opening and closing, it can be used in a medium with suspended solid particles.
    9. Anti-static function: a spring is arranged between the ball, the valve stem and the valve body to discharge the static electricity generated during the switching process.
    10. Since the material such as polytetrafluoroethylene has good self-lubricating property and the friction loss with the sphere is small, the service life of the pneumatic ball valve is long.
    11. Low fluid resistance: Pneumatic ball valve is the least fluid resistance in all valve classifications. Even for reduced diameter pneumatic ball valves, the fluid resistance is quite small.
    12. Stem seal is reliable: Since the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easy to break, and the sealing capacity increases with the increase of the medium pressure.
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