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The Malleable Iron Black Fitting Bushing is a high-performance industrial component engineered for precision diameter reduction and seamless pipe repair. Manufactured from premium high-strength malleable cast iron and treated with a high-temperature blackening anti-rust process, this bushing provides a robust solution for connecting pipes of different sizes while ensuring maximum durability in challenging environments.
Designed for versatility and reliability, these bushings excel in HVAC systems, building water supply, and drainage projects. By allowing for efficient thread repair and diameter conversion without the need for full pipe replacement, they offer an economical and time-saving alternative for maintenance professionals and industrial engineers seeking leak-proof, long-term piping integrity.
| Material | High-strength Malleable Cast Iron | Surface Treatment | High-temperature Blackening Anti-rust |
|---|---|---|---|
| Connection Type | External Small Thread + Internal Large Thread | Pressure Rating | PN10 |
| Operating Temp | -20℃ to 110℃ | Common Specs | G1/2” (Ext) to G3/4” (Int) & others |
| Precision | CNC Precision Machined Threads | Corrosion Resistance | Excellent (Blackened Finish) |
| Compliance | Industry Standard Dimensional Accuracy | Application | Pipe Diameter Reduction & Repair |
Forged from high-strength malleable iron to withstand mechanical stress and ensure a long service life in industrial settings.
Simple operation using common tools significantly reduces maintenance downtime and renovation labor costs.
Precision machining of both internal and external threads creates a dual-seal barrier to prevent leaks effectively.
Enables pipe hole enlargement or thread repair without replacing entire fitting sections, reducing material waste.
Optimized structural footprint allows for seamless installation in confined or complex piping layouts.
The specialized high-temperature blackening process protects the metal surface from rust and oxidation.
Real-time tracking of malleable iron fitting stocks to ensure timely delivery for large projects.
Strict dimensional accuracy and thread fit testing for every batch to ensure zero leakage.
Full transparency from casting and machining to surface treatment and final shipping.
Optimized supply chain management for global distribution of heavy-duty metal products.
Dedicated platform for bespoke thread specifications and special surface treatment requests.
Regular auditing against international casting and metallurgy standards (ISO/ASTM).
| Metric | Standard Pipe Replacement | Malleable Iron Bushing | Benefit |
|---|---|---|---|
| Installation Time | High (Hours) | Low (Minutes) | Rapid Recovery |
| Material Waste | High (Full Sections) | Minimal (Single Piece) | Eco-Friendly |
| Labor Cost | Expensive | Economical | Cost Reduction |
| System Downtime | Extensive | Minimal | High Efficiency |
| Sealing Reliability | Variable | High (Double Seal) | Leak Prevention |
Malleable iron undergoes a heat treatment process that removes the brittleness of cast iron, providing much higher strength and ductility, which prevents cracking under pressure.
The blackening process creates a chemically stable oxide layer on the surface of the metal, which acts as a barrier against oxygen and moisture, significantly reducing corrosion.
These bushings are rated for PN10 pressure. They are ideal for water supply, drainage, and HVAC systems, but should be verified against specific high-pressure requirements.
Clean the threaded hole thoroughly, apply sufficient PTFE tape to the external threads, and use a suitable tool to tighten the bushing without exceeding the torque limit.
They are widely used in the black metal smelting industry, construction plumbing, industrial HVAC systems, and mechanical equipment interface conversions.
Our standard products typically follow G-thread specifications (e.g., G1/2" to G3/4"). However, we can provide custom sizes based on your specific project requirements.
