For the maintenance and care of dredging rubber hoses with internal armor (with a metal reinforcement layer), the core lies in standardized use, thorough cleaning, regular inspection, and scientific storage. The dredging working environment is harsh, and the slurry, gravel and other media transported are highly abrasive to the hose. Following scientific maintenance methods can effectively extend its service life and ensure construction safety.

The following will elaborate on this from several aspects: daily use, regular maintenance, cleaning and flushing, storage management, and handling of special situations.

📋 Daily Use and Operation Standards
This is the foundation for extending the service life of hoses, with the key being to avoid ‘critical damage’.

– Strictly Prohibit Overpressure and Excessive Bending: The operating pressure must not exceed the hose’s rated working pressure, and sudden pressure shocks should be avoided as much as possible. During installation and operation, the bending radius must not be less than the specified minimum value; otherwise, it will seriously damage the internal structure.

– Avoid Improper Stress: Do not drag the hose on sharp or rough ground, and avoid twisting or folding during installation.

– Pay Attention to Medium Compatibility: Ensure that the medium being transported (such as specific component slurry, sewage) is chemically compatible with the inner rubber material of the hose to prevent corrosion of the hose.

🛠️ Regular Inspection and Maintenance Key points

Dredging hoses should establish a regular inspection system, with the following key contents:

Inspection Items

Inspection Points and Standards

Handling Recommendations

Daily/Post-Work Inspection
Check for obvious scratches, cuts, bulges, or abnormal deformation on the outer surface; check for leaks at connection points and whether bolts are loose.
For minor damage, temporary treatment with a dedicated repair agent is possible; for leaks at connections, stop the machine immediately, tighten, or replace the seal.

Regular In-depth Inspection (Recommended every 50-100 working hours or weekly)
After thorough cleaning, inspect the inner wall for wear, checking for severe grooves, delamination, or adhered hardened substances; observe if the hose shows signs of aging such as hardening, brittleness, or loss of elasticity.
If inner wall wear exceeds 1/3 of the wall thickness or delamination occurs, replacement should be done promptly; if obvious aging traces are present, even without damage, planned replacement is recommended.

Pressure Testing
If the hose has been subjected to abnormal pressure or used long-term in high-pressure conditions, a hydraulic test should be performed.
Conducted by professional personnel in accordance with safety regulations to confirm if the hose’s pressure-bearing capacity meets the standard; those not meeting the standard must be replaced immediately.

🧽 Cleaning and Flushing Procedure
Thorough cleaning after operation is crucial to prevent increased inner wall wear and pipeline blockage. The specific procedure is as follows:

1. Immediate flushing after operation: After each shutdown, immediately flush the pipe cavity with clean water in reverse or forward direction until clear water flows out, to prevent residual mud and sand from hardening.

2. Handling of stubborn residues: For media with high viscosity,Specialized Cleaning Ball(special cleaning balls) can be used or dilution circulation cleaning can be performed to ensure the pipe cavity is clean.

3. Pre-treatment before long-term shutdown: Before planned long-term shutdown, ensure the pipe is completely dry. This can be achieved through ventilation and air-drying to prevent rusting of the inner armor layer or mold growth inside the pipe.

📦 Storage Management Standards

Proper storage can prevent hoses from \”naturally shortening their lifespan\” during non-use periods. The specific standards are as follows:

– Environmental requirements: Store in a dry, cool, and well-ventilated indoor area. The ideal temperature is 10℃-25℃, avoiding environments above 40℃ or below 0℃. Absolutely avoid direct sunlight and keep away from ozone sources (such as near large motors or transformers).

– Placement methods:

– Coiled hoses: Should be placed horizontally, avoiding stacking too high to prevent deformation of the lower hoses.

– Straight hoses: Place horizontally on supports, avoiding hanging or bent storage.

– Isolation requirements: During storage, do not come into contact with oils, solvents, acidic chemicals, or metal parts such as copper and iron to prevent hose damage.

⚠️ Special Note: Avoid \”dry running without load\”

This is particularly important for inner-armored dredging rubber hoses. When conveying media, the media acts as a lubricant and coolant. If the equipment runs idle or under no-load/low-load conditions, the internal metal reinforcement layer and rubber will generate high temperatures due to dry friction, rapidly causing rubber aging and cracking.

– Operation tips: Confirm sufficient material supply before starting the equipment; if the pause time is long (e.g., over 10 minutes), empty the residual medium in the pipe or inject clean water to protect the pipe wall.

💎 Summary and Core Recommendations

In summary, the maintenance of inner-armored dredging rubber hoses can be summarized as the following core points:

– The core lies in prevention: Following standardized usage procedures and promptly flushing after operation is more effective in extending the hose life than post-factum repairs.

– The key is regular inspection: Establish a regular inspection mechanism, focusing on signs of inner wall wear and aging, to enable early warning and timely replacement.

– Pay attention to shutdown protection: When not in use for a long time, store according to standards to avoid premature aging caused by environmental factors.

If more specific working condition information can be provided, such as the main type of conveyed medium, average working pressure, or specific problems encountered, a more targeted maintenance plan can be further provided.