Underground High-pressure Pipes

Scenario 2: Underground High-pressure Pipes (Gold/Copper Mines) (Suitable for High-pressure Water Supply/Tailings Projects)

1. Core Requirements & Product Selection

 High-pressure & Wear Resistance Key: High-pressure and wear-resistant fittings and erosion-resistant valves are required for high-pressure water supply/tailings transportation. We integrate resources from over 2 high-pressure fitting manufacturers in China. Regular models (forged carbon steel + ceramic wear-resistant coatings, pressure resistance ≥30kg, DN80–DN200) are in sufficient stock and ship within 10 days. For tailings with high-hardness particles (e.g., quartz sand), we can coordinate 30-day customized tungsten carbide coated models with Chinese manufacturers and provide hardness test reports to ensure wear resistance.

 Product Specification Matching:

---High-pressure Water Supply Connection: DN80–DN125 forged flange fittings (suitable for 25–30kg pressure). Chinese manufacturers produce high-precision flange sealing surfaces to prevent high-pressure leakage.

---Tailings Transportation Connection: DN150–DN200 forged wear-resistant fittings (wear-resistant coating thickness ≥0.3mm, wear-resistant to tailings scouring).

---Valve Selection: High-pressure wear-resistant ball valves (DN80–DN125) for water supply (wear-resistant alloy cores); high-pressure wear-resistant gate valves (DN150–DN200) for tailings (resistant to frequent opening/closing). Based on tailings particle hardness, we match Chinese manufacturers with corresponding wear-resistant coating grades to ensure service life.

 Material Assurance: Fittings are uniformly made of 16Mn carbon steel (manganese content ≥1.2%, good low-temperature toughness). Chinese manufacturers conduct low-temperature impact tests for each batch to avoid brittleness at underground low temperatures (5℃).

2. Construction & Acceptance Standards

 Installation Specifications:

---Secure high-pressure fittings to independent brackets (spacing ≤3m) to avoid interface leakage from pipe vibration.

---Install tailings wear-resistant valves at a 15° angle (facilitates sediment flow and reduces accumulation). We provide installation diagrams from Chinese gold mine tailings pipes for your team’s operation.

 Key Acceptance Indicators:

---High-pressure Test: Maintain 1.5x working pressure (45kg) for 1 hour with no leakage.

---Wear Resistance Test: Flush with tailings slurry (30% concentration) for 2 hours with no coating peeling. We provide wear resistance test reports from Chinese tailings projects to support your project acceptance.

3. Common Issues & Solutions

· Issue 1: Valve cores wear quickly due to high-pressure tailings slurry impact.

Solution: Select "high-pressure valves with replaceable cores" (sufficient stock from Chinese manufacturers, 60% lower core replacement cost than full valve replacement). For tungsten carbide cores, 30-day customization can be coordinated with Chinese hard alloy manufacturers for production.

· Issue 2: Electric valves fail to open/close due to unstable underground voltage.

Solution: Select "manual + electric dual-purpose high-pressure valves" (30-day customization, 25% cost increase). Coordinate with Chinese valve manufacturers to integrate manual opening/closing structures for manual operation during power outages, ensuring normal pipe operation.