First, what kind of liquid can be transported by crane tube
1, diesel oil is generally used under the crane pipe or liquid loading truck loading and unloading.
2. Aniline, phenol, formaldehyde, formic acid, ethylene glycol, propylene glycol, cyclopentane, ethyl silicate, chloroethanol, chloropropanol, dimethylformamide shall be loaded under liquid, and the end of the vertical pipe shall be in the form of outlet.
3, wax oil, residual oil, lubricating oil, glycerin, diethylene glycol ether, etc., can be loaded by inserting short vertical pipe.
4. Gasoline, benzol, toluene, ethylbenzene, ethyl ether, ethanol, dichloromethane, ethyl acetate, kerosene, glacial acetic acid, butanol, propylbenzene, epichlorohydrin, isoamyl alcohol, etc., are generally suitable for top loading and unloading.
5, butadiene, liquefied gas, dimethyl ether, liquefied ethylene, propylene, propane, ethane, etc. are generally suitable for bottom loading and unloading crane pipe.
Two, loading crane pipe selection principle
1, corrosive fluid media, should avoid splashing and ensure personal safety, should be used closed loading or vertical tube inserted into the bottom of the tank truck loading.
2, easy to produce static accumulation and volatile liquid medium, loading should be inserted with a closed expansion tube with a return pipe.
3, easy to produce static accumulation of low volatile liquid media, loading should be used plug-in long vertical pipe, can be used with diverter cap outlet or open telescopic pipe.
4, low volatile liquid media, loading emissions to the environment pollution or harm to the human body, should be used with a return pipe, closed short vertical pipe or long vertical pipe outlet loading.
5. The loading and unloading of combustible liquid media of class A and B shall be carried out in a closed manner, and the crane pipe shall adopt the structural form of a return pipe, and the nitrogen seal or balance pipe shall be used to balance the gas phase, and the gas phase shall be returned to the tank farm equipment or the production device.
6. When loading and unloading flammable and volatile liquid media, the liquid loading and unloading arm should adopt the vertical pipe interface type with the "return pipe closed expansion pipe outlet".
7, non-hazardous liquid medium, can be loaded by open insert type, short vertical pipe.
8. For class A, B and B A liquid media, the top sealing cap (cap) type sealing liquid of the gas pipeline should be used to load the car, and the end of the vertical pipe should be in the form of a diversion port, and the vertical pipe should be deep into the bottom of the tank before filling.
9, B, B, class A liquid medium should be loaded under the liquid, and the end of the vertical pipe should be in the form of a splitter.
10. Class C and B liquid media can be loaded with plug-in short vertical pipe.
11. When the temperature is 20 ° C, for the liquid medium with steam pressure greater than 5kPa (A), the volatile gas has a certain recovery value, and the top sealing cap (cap) type of closed loading should be used.
12, when the ambient temperature is lower than the freezing point of the liquid medium, the liquid handling arm should take heat tracing measures.
13. When there are requirements for low temperature fluidity of liquid medium, jacketed heat tracing or electric heat tracing measures can be used.
14. When the outer wall of the tracing tube and the process tube are not in direct contact, heat insulation should be carried out.