ACC Composite Hose User Manual
Composite Hose Handling Guide
The operation personnel must be trained before handling a standardized and safe operation of composite hoses.
Before use
The following should be checked before each use of the composite hose:
- Whether the surface of the hose is dented, twisted, worn, or corroded.
- Whether the steel wire moves.
- Whether there is any displacement between the hose body and the couplings.
- When transferring inorganic acid and inorganic alkali media, the couplings and the inner wall of the hose must be in a dry state, and no residual moisture is allowed to prevent the hose from being damaged by corrosion.
In use
- When moving the hose, it is forbidden to drag the hose on the ground.
- Precautions during use:
Incorrect: Lift the hose without any support in the middle.
Correct: Use a special sling to hang the hose in a suitable position.
Incorrect: Lift the hose from its couplings or directly against sharp edges.
Correct: Support the hose near its couplings.
Incorrect: The hose is bent less than the minimum bending radius, without any protective measures.
Correct: Use a special sling to hang the hose in a suitable position.
Incorrect: Hang the hose with a single rope.
Correct: Use a special sling to hang the hose in a suitable position.
After use
- For hoses used for a specified medium, clean out the hoses after each use and seal the couplings with blind flanges.
- For hoses used for media not specified, clean out the hoses immediately after each use. Cleaning methods such as water flushing, steam, or nitrogen and other inert gas purging are chosen according to the transferring medium. The gas pressure should not exceed 3.5 bar.
- After transferring strong acid and alkali media, it is forbidden to flush the hose with water. An inert gas such as nitrogen with a pressure of no more than 3.5 bar should be used to clean out the hose. After drying, use blind flanges to seal the couplings to prevent water vapor from entering and keep the inner wall dry.
Storage
- The hose should be stored on a special rack with appropriate protection measures. There should be no sharp objects and chemical corrosion products around the hose.
- If the hose needs to be coiled for storage, it should be noted that the bend radius of the coil shall not be less than the minimum bending radius of the hose design.
- The storage must prevent forces from squeezing the hose.
- Long-term outdoor exposure of the hose is prohibited.
Composite hose inspection
Hydrostatic test — To ensure the safe use of hoses, the hydrostatic test and conductivity test should be performed at least once a year.
- Put the hose straight and flat on the support or on the ground to ensure that the hose can move smoothly under pressure.
- Check whether there is conduction between the couplings at both ends, and the non-conductive hose should be stopped using immediately and treated accordingly.
- Use test blind flanges or quick connectors to seal the couplings, fill the hose with water to remove air.
- Pressurize the hose to the maximum working pressure and continue for 15 minutes to check whether there is any leakage in the hose couplings and the hose body or whether the couplings and the hose body are displaced or not, and check the resistance value at both ends of the hose.
- Release the pressure, clean out the liquid in the hose and test again whether the two ends of the hose are conductive.
Composite hose repair
The composite hoses produced by ACC are maintainable. Hoses with issues such as displacement of wire helix, dented hoses due to operation or external force, can be sent back to our factory for repair.
Supply of accessories
ACC has an inventory of various accessories matching with composite hoses, as well as fast logistics services, providing customers with composite hose related accessories and wearing parts with guaranteed quality and stable supply.
Operation training
After many years of service to the vast number of users, ACC has accumulated experiences and trained an after-sales service team. ACC can start from the working principle of composite hoses, help customers master the operation technology and maintenance knowledge of composite hoses, and guide operation personnel to use hoses in correct and standard procedures.
Technical documents
ACC has a large number of composite hose documents, and is willing to provide customers with technical documents such as Product Manual, Accessory Standards, and Table of Transferring Media, which lists the application of various composite hoses to different media. For customers with zero experience of using a composite hose, it is recommended to contact ACC technical service department before making a decision on hose selection.