450mm butt fusion welding machine is a heavy-duty hydraulic welding equipment designed for joining thermoplastic pipes and fittings with outer diameters ranging from 180mm to 450mm (or 200mm to 450mm depending on the model). This machine is essential for industries requiring secure, leak-free connections in water supply, gas distribution, mining, and industrial pipeline systems.
Using the butt fusion welding method, the machine heats the pipe ends to a molten state and then applies controlled hydraulic pressure to fuse them together, creating a joint that is as strong as the pipe itself.
Core Components of a 450mm Butt Fusion Machine
1. Hydraulic Clamping Unit
Unlike mechanical models, hydraulic clamps provide uniform radial pressure. This prevents "V-gap" defects during the critical cooling phase.
2. Removable Heating Plate (PTFE Coated)
The heating plate features a high-grade PTFE (Teflon) non-stick coating. At 450mm diameters, drag resistance is high; a clean coating ensures even melt distribution.
3. Hydraulic Pressure Pump (2-Stage)
A 2-stage piston pump allows for rapid pressure build-up during the "heat soak" and "join" phases, reducing cycle time by up to 15%.
4. Automatic Spider Aligner
Four independent jaws with fine-adjustment screws ensure perfect axial alignment, crucial for thick-wall 450mm pipes.
Technology parameter
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Hydraulic Butt Fusion Machine SDD450 200MM-450MM (8" IPS -18'' IPS) Product Details
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WELDING RANGE O.D.
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200MM - 450MM
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PISTON AREA
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22.37cm²
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POWER SUPPLY
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380V±110%, 50/60HZ
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TEMPERATURE RANGE
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MAX. 320ºC
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HEATER POWER
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5.38KW
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PACKING DIMENSION
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1300*840*840 MM
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TRIMMER POWER
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1.5KW
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820*600*1100 MM
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PUMP POWER
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1.5KW
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710*340*400 MM
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WORKING PRESSURE RANGE
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0 - 120 BAR
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GROSS WEIGHT
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493KGS
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Welding Procedure: Step-by-Step Guide
Preparation: Clean and align the pipes in the machine clamps.
Facing (Planing): Use the trimmer to machine both pipe ends flat and parallel.
Heating: Place the heating plate between the pipe ends and apply contact pressure to form a uniform "bead."
Soaking: Maintain heating time based on pipe diameter and wall thickness (per DVS 2207 standards).
Fusion: Remove the heating plate and immediately join the pipe ends under controlled pressure.
Cooling: Maintain cooling pressure without disturbance until the joint solidifies.
Maintenance Tips
1. Hydraulic Oil Check: Change the oil (ISO VG 32 or 46) every 500 hours.
2. PTFE Cleaning: Never use metal scrapers on the heating plate; use a hardwood spatula.
3. Facer Blades: Rotate or sharpen carbide blades after every 100 facings.
4. Cylinder Seal Inspection: Check for hydraulic leaks at the ram seals quarterly.
5. Voltage Stability: Use a 230V/50Hz stabilizer to protect the PID temperature controller.
Application
1. Municipal Water Systems: Fusion of PE100 pipes for potable water mains.
2. Gas Distribution: Medium pressure (4 bar to 10 bar) polyethylene gas lines.
3. Industrial Effluent: Chemical-resistant HDPE lines for factories.
4. Dredging & Mining: Abrasion-resistant slurry transport lines.
FAQ
Q: Can a 450mm machine weld 110mm pipes?
A: No. The clamping range is typically 200mm to 450mm. Using smaller pipes requires a specific insert set (generally down to 160mm). For 110mm, use a 160mm or 250mm machine.
Q: What is the average welding cycle time for a 450mm SDR11 pipe?
A: Approximately 12 to 18 minutes, depending on ambient temperature and wall thickness (including heating, changeover, and cooling phases).
Q: Does this machine comply with ASTM F2620?
A: Premium 450mm butt fusion machines are designed to meet ASTM F2620 and ISO 21307 standards when operated with the correct pressure charts.
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