Underground Garages

Scenario 2: Underground Garages (Suitable for Humid Environment Projects)

1. Core Requirements & Product Selection

 Environment Adaptation Key:

Humid, poorly ventilated underground garages require hot-dip galvanized malleable iron fittings (zinc layer thickness ≥65μm, 2x more corrosion-resistant than cold galvanization) and "stainless steel core valves" (prevents internal component rust and seizure). We integrate resources from over 5 galvanized fitting manufacturers in China. Regular specifications (DN50–DN150) are in sufficient stock and can be shipped from nearby Chinese ports within 10 days. For projects requiring explosion-proof features (e.g., flammable storage in garages), we can coordinate with professional Chinese manufacturers for 30-day customized explosion-proof models to ensure compliance.

 Product Specification Matching:

---Sprinkler Pipe Connection: DN50–DN80 grooved fittings (grooved joints + sealing rings, excellent sealing to prevent humid environment leakage). Mainstream manufacturers in China produce these in bulk for on-demand allocation.

---Fire Hydrant Pipe Connection: DN100 galvanized threaded fittings (straight joints, tees, easy for later maintenance, thread accuracy meets international standards).

---Valve Selection: Carbon steel ball valves (DN50–DN80) for sprinkler systems (fast opening/closing); cast iron check valves (DN80–DN100) for drainage branches (prevents backflow). Based on project budgets, we match cost-effective products from high-, medium-, and low-end manufacturers in China.

 Special Assurance: Fittings uniformly include a "pressure test port" (DN15) for regular pipe pressure testing. Chinese manufacturers can produce in bulk to this standard without additional customization, reducing costs.

2. Construction & Acceptance Standards

 Installation Specifications:

---Install fittings ≥2.2m above the ground (avoids vehicle scratches); space sprinkler branch fittings ≤3.6m apart (meets basic fire protection requirements). We provide references from Chinese construction cases to assist your team in planning.

---Before assembling valves and fittings, apply anti-rust paint to interfaces (moisture-resistant paint uniformly sourced from China, included in small buckets with shipments) to prevent rust from temperature fluctuations in underground garages.

Key Acceptance Indicators:

---Sealing Test: Maintain 0.8MPa water pressure for 24 hours with no interface leakage (water seepage ≤0.01L/(m·h)). We provide factory test reports from Chinese manufacturers to support your project acceptance.

---Corrosion Test: No zinc layer peeling 24 hours after sprinkler testing. We conduct sampling tests on each batch of products sourced from China to ensure stable quality.

3. Common Issues & Solutions

Issue 1: Valve cores seize after long periods of inactivity in underground garages.

Solution: Prioritize "ball valves with grease injection ports" from Chinese manufacturers (available in stock); inject grease every 3 months. For automatic lubrication, we can coordinate 30-day customization with Chinese manufacturers, integrating automation component resources in China to ensure functionality.

Issue 2: Ground settlement causes fitting interface leakage.

Solution: Use "flexible grooved fittings" for regular projects (DN50–DN100, sufficient stock, compensates for ±5mm settlement). For larger settlement (>±5mm), custom compensation models can be produced within 30 days by coordinating mold adjustments with Chinese manufacturers for rapid response.