Specifications
| Parameter | Specification |
|---|---|
| Product Name | Double Layer Anti-Spark PU Pneumatic Tube |
| Product Series | PUH Series |
| Product Structure | Double-layer polyurethane tubing |
| Inner Tube Material | Polyurethane |
| Outer Layer | Flame-retardant protective material |
| Working Medium | Compressed air and compatible non-corrosive gases |
| Working Temperature | -20°C to +80°C |
| Recommended Continuous Temperature | -10°C to +60°C |
| Maximum Working Pressure | 1.0 MPa / 10 bar at 20°C |
| Minimum Burst Pressure | 3.0 MPa / 30 bar at 20°C |
| Standard Roll Length | 100 m |
| Main Function | Compressed-air transmission with protection against welding sparks and hot spatter |
| Typical Applications | Welding robots, automotive welding lines, pneumatic tools, machine panels and industrial automation |
| Fitting Compatibility | Suitable push-in fittings selected according to tube outside diameter |
| Selection Checks | Confirm tube size, temperature, pressure, bend radius, fluid, color, roll length and fitting compatibility |
Model Selection and Dimensions
| Model | O.D. | I.D. | Roll Length | Max. Working Pressure at 20°C | Min. Burst Pressure at 20°C | Min. Bend Radius |
|---|---|---|---|---|---|---|
| PUH0604 | 6 mm | 4 mm | 100 m | 10 bar | 30 bar | 15 mm |
| PUH0805 | 8 mm | 5 mm | 100 m | 10 bar | 30 bar | 20 mm |
| PUH1065 | 10 mm | 6.5 mm | 100 m | 10 bar | 30 bar | 30 mm |
| PUH1280 | 12 mm | 8 mm | 100 m | 10 bar | 30 bar | 45 mm |
| PUH1/4 | 6.35 mm | 4.23 mm | 100 m | 10 bar | 30 bar | 20 mm |
| PUH3/8 | 9.52 mm | 6.35 mm | 100 m | 10 bar | 30 bar | 30 mm |
Pressure Notice: Maximum operating pressure decreases as the tube temperature increases. The listed 10 bar pressure applies at approximately 20°C and should not be treated as the allowable pressure across the entire temperature range.
Product Features
Double-Layer Protective Structure
The inner polyurethane tube provides flexible compressed-air transmission, while the outer protective layer helps reduce damage caused by welding sparks, hot particles and metal spatter.
Designed for Welding Environments
The tubing is suitable for pneumatic systems installed near spot welding, robotic welding and metal-processing equipment where ordinary PU tubing may be exposed to hot spatter.
Flexible Pneumatic Routing
The polyurethane inner tube allows the air line to be routed around robotic arms, fixtures, valves, cylinders and compact machinery while maintaining practical flexibility.
Multiple Metric and Inch Sizes
Metric models from 6 mm to 12 mm and common inch-size options are available for different flow requirements, fittings and machine layouts.
Small Bend Radius
The available models provide minimum bend radii from approximately 15 mm to 45 mm, supporting installation in compact robotic and automation equipment.
Easy Cutting and Installation
The tube can be cut to the required length and connected to matching pneumatic push-in fittings when the tube end is clean, square and undamaged.
Pressure Resistance for Industrial Air Lines
Comparable PUH tubing is rated for a maximum working pressure of 10 bar at approximately 20°C, making it suitable for common industrial compressed-air systems.
Applications
Robotic Welding Systems
Used to route compressed air to robotic grippers, clamps, cylinders, valves and welding-gun auxiliary equipment.
Automotive Welding Lines
Suitable for vehicle body welding stations where pneumatic tubing may be exposed to sparks and hot metal particles.
Spot Welding Equipment
Provides air connections for clamps, actuators, positioning devices and other pneumatic components around spot-welding machinery.
Metal Fabrication Machinery
Used in cutting, welding, forming and metal-processing equipment requiring protected compressed-air lines.
Pneumatic Control Panels
Connects air preparation units, solenoid valves, manifolds, cylinders and fittings inside industrial machine systems.
Assembly and Packaging Equipment
Suitable for production machinery operating close to welding or other processes that generate sparks and hot particles.
Why Choose HOMIPNEU
HOMIPNEU supplies anti-spark tubing, standard PU air hose, nylon tubing, recoil hose, pneumatic fittings, solenoid valves, cylinders and air preparation components.
We help customers confirm tube dimensions, operating pressure, temperature range, bend radius, roll length, fitting size and installation environment before ordering.
Stable bulk supply, export packaging, private labeling and OEM customization are available for pneumatic tubing and industrial air-line projects.
FAQ
What is double-layer anti-spark PU tubing?
It is pneumatic polyurethane tubing with an additional protective outer layer designed to reduce damage from welding sparks, hot metal particles and weld spatter.
What is the recommended working temperature?
The proposed operating range is -20°C to +80°C. For continuous operation, -10°C to +60°C is the more conservative recommended range.
What is the maximum working pressure?
The proposed maximum working pressure is 1.0 MPa or 10 bar at approximately 20°C.
What is the minimum burst pressure?
The proposed minimum burst pressure is 3.0 MPa or 30 bar at approximately 20°C.
Does the allowable pressure change with temperature?
Yes. Polyurethane tubing pressure capacity decreases as temperature increases. System pressure must be reduced when the tubing operates at elevated temperatures.
What sizes are available?
Common models include 6 × 4 mm, 8 × 5 mm, 10 × 6.5 mm, 12 × 8 mm, 1/4 inch and 3/8 inch sizes.
Can it be used with standard push-in fittings?
Yes. Select fittings according to the tube outside diameter and confirm that the fitting is suitable for the tube material and working pressure.
Is the tube completely resistant to welding damage?
No pneumatic tube should be described as completely spark-proof. The outer layer improves protection against sparks and spatter, but direct flame exposure and prolonged contact with molten metal should still be avoided.
Does the product meet UL94 V-0?
Comparable products commonly offer a V-0 flame-retardant outer layer, but this rating should only be published after the applicable material certificate or test report has been confirmed.
Customization Support
HOMIPNEU can provide different tube sizes, colors, roll lengths, printing, labels and packaging configurations. Customers should provide the required outside diameter, inside diameter, pressure, operating temperature, fitting type, welding environment and expected quantity for accurate selection.
