Chemical resistant hose should be cleaned after use, before testing or long storage. The hose cleaning is very important. Regular cleaning of the chemical resistant hose can prolong the service life of the hose. Especially when it is not used for a long time, it is necessary to clean the chemical resistant hose before storage to remove residues.
The cleaning method of the chemical resistant hose should depend on the environment and use of the hose. The hose can be cleaned by water, hot water, detergent, normal temperature solution or sea water for washing according to the actual situation.
If the use of seawater cleaning, after cleaning the chemical resistant hose must be thoroughly drained, in order to prevent the chemical tube by residual seawater corrosion.
If the hose is used to transfer strong acid medium before cleaning, the residual medium must be removed before cleaning to prevent exothermic reaction due to friction when cleaning.
After the transmission of rubber medium, there should not be any residue in the hose, in order to prevent the next use of hose chemical reaction.
In addition, steam or air can also be used to clean the chemical hose, but the temperature and pressure can not be too high, and the joint at both ends of the chemical tube must be loosened, so as not to damage the woven fabric and film in the hose. In the cleaning process, the chemical resistant hose must be kept flat.
Clean the chemical resistant hose that has been stored for a period of time. Test the hose before using it again. Old or worn chemical tubes may cause accidents. Therefore, visual inspection should be performed before each use of the hose, and a thorough inspection should be performed at least every six months.
Before inspection, cleaning and testing of chemical resistant hose, special attention should be paid to the following matters:
1 The appearance of no sag or distortion signs.
2. Whether the internal and external steel wires are loose.
3. Whether the outer steel wire is corroded or worn.
4. Whether the joint is loose or leaky.
5. Other abnormal characteristics, such as corrosion, wear or external force damage of the joint.
6. Whether the surface and the whole tube are eroded by chemical substances or damaged by external forces.