HG003 Thickened rubber inflatable water-blocking airbag for municipal sewage pipe leakage, circular A-grade inflatable water-blocking airbag

• Industrial high-pressure pipelines (petrochemical, power generation, and chemical processing systems)

• Municipal high-pressure water supply networks

• Oil and gas transmission pipelines

• High-pressure sewage and wastewater pipelines in heavy industries

They often work in tandem with pipeline valves (e.g., cast iron gate valves) to enhance operational safety—for instance, during high-pressure pipeline repairs, the airbag blocks flow upstream, while valves control downstream pressure, minimizing downtime and leakage risks.

• Inflatable Bladder: The core sealing element, typically made of multi-layered high-strength rubber (e.g., nitrile rubber, EPDM, or neoprene) reinforced with polyester or nylon fabric. This structure resists tearing, abrasion, and chemical corrosion under high pressure.

• Pressure Relief Valve: A safety-critical component that prevents over-inflation by automatically releasing excess air when the internal pressure exceeds the rated limit (prevents bladder rupture).

• Inflation Port: Equipped with a high-pressure quick-connect fitting compatible with standard air compressors or hydraulic pumps, ensuring fast and secure inflation.

• End Plates/Collar: Rigid or semi-rigid components (usually made of aluminum alloy or reinforced plastic) at both ends of the bladder, enhancing stability and preventing the airbag from slipping inside the pipeline during pressure loading.

• High Pressure Resistance: Reinforced rubber layers maintain structural integrity even under 10+ MPa pressure, meeting international standards (e.g., ISO 4413 for hydraulic fluid power systems).

• Chemical Compatibility: Resists corrosion from oils, solvents, acids, and alkalis—suitable for both water-based and industrial fluid pipelines.

• Abrasion Resistance: Reinforced fabric layers reduce wear caused by pipeline inner-wall friction or sediment, extending service life to 500+ usage cycles (under proper maintenance).

Preparation: Select an airbag with a diameter matching the pipeline (typically 5%–10% larger than the pipeline ID for interference fit). Inspect the bladder for cracks, leaks, or damage, and ensure the pressure relief valve is functional.

Insertion: Place the deflated airbag into the target pipeline section (use guide ropes for large-diameter pipelines to avoid misalignment).

Inflation: Connect the inflation port to a high-pressure air compressor or hydraulic pump. Inflate the bladder gradually (pressure rise rate ≤ 0.2 MPa/min) until reaching the recommended operating pressure (80%–90% of the rated pressure, specified by the manufacturer).

Sealing & Operation: As the bladder inflates, it expands to fit the pipeline inner wall tightly, creating a leak-proof seal that blocks fluid flow. Perform maintenance, testing, or repair work downstream.

Deflation & Removal: After completion, release air from the bladder via the inflation port. Once fully deflated, pull the airbag out of the pipeline using guide ropes.

• Rapid Deployment: Inflates/deflates in 5–15 minutes (depending on size), significantly faster than traditional mechanical plugs (e.g., steel plugs), reducing pipeline downtime.

• Secure Sealing: Interference fit design and high-pressure resistance ensure zero or minimal leakage (meets API 6D standards for pipeline leakage control).

• Versatility: Available in diameters from 50 mm to 3000 mm, compatible with carbon steel, stainless steel, and PVC pipelines.

• Cost-Effective: Reusable design (500+ cycles) and low maintenance requirements (no regular part replacement) lower long-term operational costs compared to disposable plugs.

• After each use, clean the bladder with water or neutral detergent to remove sediment, oil, or chemicals.

• Inspect the bladder for cuts, bulges, or rubber degradation—replace damaged bladders immediately.

• Lubricate the inflation port and quick-connect fitting with silicone grease to prevent corrosion.

• Store in a cool, dry, and shaded area (avoid direct sunlight or extreme temperatures, which accelerate rubber aging).

• Never exceed the rated pressure (risk of bladder rupture and pipeline damage).

• Use only compatible inflation equipment (high-pressure pumps with pressure gauges calibrated annually).

• Ensure the pipeline is depressurized as much as possible before inserting the airbag (do not use for blocking fully pressurized pipelines without professional guidance).

• Post warning signs around the work area to prevent accidental inflation/deflation during operation.

• ISO 4413 (Hydraulic fluid power systems and components—General rules and safety requirements)

• API 6D (Pipeline and piping valves—Specification for ball valves, gate valves, and check valves)

• DIN 30650 (German standard for pipe plugs and test plugs)

• ASME B31.3 (Process piping—Code for pressure piping in chemical, petrochemical, and related processes)