🧿 Part 1: How to Handle a Pressurized Cement Pipe Leak (Working with Water)

When a cement pipe leaks under pressure, stopping the leak safely and quickly is the primary goal. The core principle is to externally seal the leak without completely shutting off the water supply.

The following are the specific steps and precautions:

1. Preliminary Preparation and Safety First
Safety Assessment: Observe the leak (spraying, surging), water pressure, and leak location (ground, overhead, within the pipe corridor). Ensure the work area is well ventilated and free of risks such as landslides and electric shock.
Pressure Reduction Measures: If conditions permit, contact the dispatch center to appropriately reduce the pipeline pressure. This can significantly reduce the difficulty and risk of repairs. Even if a complete water shutoff is not possible, reducing the pressure by even 0.1 MPa can make a significant difference.
Personnel Protection: Maintenance personnel must wear waterproof clothing, protective glasses, insulating gloves, and non-slip rubber shoes. Tools and Materials: Based on the shape of the leak and the pipe diameter, prepare appropriate pipe leak repair clamps (also known as leak repair clamps), bolts, sealant, cleaning tools (wire brush, scraper), wrench, crowbar, etc.

2. On-site Operation Procedures

Cleaning the Work Surface: Use a wire brush and scraper to thoroughly remove any cement mortar residue, moss, rust, and other debris from the pipe wall around the leak, exposing the solid pipe. The cleaning area should be slightly larger than the area covered by the leak repair clamp. This is a critical step in ensuring a good seal.

Installing the Leak Repair Clamp:
Apply a specialized pipe sealant (such as polymer rubber sealant) to the leak repair clamp's sealing ring or the cleaned area on the pipe wall to enhance the watertightness.

Close the two halves of the leak repair clamp, align them with the center of the leak, and wrap them around the pipe.

Tighten the Bolts First: Quickly attach nuts to several bolts and hand-tighten until they stop.

Tighten Symmetrically and Evenly: Use a wrench to tighten all bolts evenly in a diagonal order, one after the other. Never tighten a single bolt all at once, as this may cause the leak repair clamp to shift and compromise the seal. Tighten the clamp consistently each time until the leak is completely stopped and the clamp is firmly seated against the pipe wall.

3. Post-Operation Observation

After the repair is completed, maintain stable pipe pressure and observe for a period of time (e.g., 15-30 minutes) to confirm that there are no leaks.

If the system returns to full pressure, recheck the condition of the leak repair clamp.

Important Note:

For explosive or large-diameter leaks: If the leak is significant and the pipe crack is long, the leak repair clamp may not be adequate. In this case, shutting off the service and performing large-scale operations such as pipe replacement are necessary.

Professional Judgment: The above method is suitable for most localized leaks, such as holes and circumferential cracks. If the entire pipe is severely deteriorating, a complete replacement should be planned.

🧿Part 2: Advantages of Using Leak Repair Clamps

Leak repair clamps are specialized repair tools designed for localized pipe leaks. They offer significant advantages, particularly in pressurized repair scenarios:

1. Fast and efficient, reducing water outages

The biggest advantage: Installation is typically completed in just tens of minutes, ensuring no water outages or extremely short pressure reductions, minimizing impacts on downstream users' lives and production. This is crucial for critical pipe networks such as water supply and fire protection.

2. Excellent sealing performance and strong pressure resistance

Modern leak repair clamps are made of high-strength materials (such as carbon steel, stainless steel, and cast iron) and high-quality rubber seals (such as EPDM). Tightening with bolts creates a sealing pressure far exceeding the internal pressure of the pipe, effectively resisting water pressure and providing reliable and long-lasting leak-stopping results.

3. Wide adaptability and wide application

Various pipe materials: Suitable not only for cement pipes, but also for cast iron, steel, PVC, PE, and other pipe materials.

Various leak points: Effectively repair various types of damage, including holes, cracks, and leaking joints.
Various Specifications: Available in various types, including standard leak repair clamps, double-disc leak repair clamps, and spigot leak repair clamps, they can handle various situations, including straight pipe runs, pipe fractures, and loose spigots.
4. Easy Operation and Low Labor Costs
The ingenious structural design requires no special equipment or complex techniques (such as welding or flange connections) for installation. Ordinary maintenance personnel can operate the clamps after simple training, saving the investment in specialized technicians and large equipment.
5. Safe, Reliable, and Economical
Compared to traditional water outage and pipe replacement processes involving welding, these leak repair clamps significantly reduce operational risks (such as welding sparks and lengthy pit work).
Although the cost per unit of a leak repair clamp is higher than traditional materials, considering the significant indirect economic losses caused by water outages (such as factory shutdowns and resident complaints), the overall economic benefits are very high.

The following are Baoshuo brand oil-resistant leak repair clamps, high-temperature-resistant leak repair clamps, acid- and alkali-resistant leak repair clamps, stainless steel leak repair clamps, high-pressure-resistant leak repair clamps, and large-diameter leak repair clamps.

The housing is typically made of metals such as ductile iron and carbon steel, which are corrosion-resistant and high-strength. It can last the same life as the original pipe, eliminating the need for frequent repairs. Baoshuo brand carbon steel half joints are available in a variety of rubber materials, including NBR, EPDM, FKM, and silicone rubber. The half joint body is available in Q235 carbon steel and 304 and 316L stainless steel.

The following are Baoshuo brand oil-resistant pipe repair clamps, high-temperature-resistant pipe repair clamps, acid- and alkali-resistant pipe repair clamps, stainless steel pipe repair clamps, high-pressure-resistant pipe repair clamps, and large-diameter pipe repair clamps.

Summary

For pressurized cement pipe leaks, the most mainstream and efficient method is to clean the leak, apply sealant, install the leak repair clamp, and symmetrically tighten the bolts.

The core advantage of the leak repair clamp lies in its "speed, accuracy, and effectiveness"—rapid response, precise sealing, and powerful leak cessation. It is a modern pipeline repair technology that combines efficiency, reliability, cost-effectiveness, and safety.