MULTILAYER GAS PIPING SYSTEM
The RIFENG Multilayer Gas Piping System is a new generation of pipe that combines the benefits of a plastic and metal pipe, providing high flexibility and toughness as well as high pressure and temperature resistance. Overlapped and butt-welded are both available for the aluminum alloy layer and guarantee a complete barrier against oxygen and light and provide excellent mechanical and chemical properties.
The RIFENG Multilayer Gas Piping System is a new generation of pipe that combines the benefits of a plastic and metal pipe, providing high flexibility and toughness as well as high pressure and temperature resistance. Overlapped and butt-welded are both available for the aluminum alloy layer and guarantee a complete barrier against oxygen and light and provide excellent mechanical and chemical properties.
Butt welding multilayer pipe
RIFENG butt welding multilayer pipe guarantee that the aluminum layer and plastic layer stays roundness and uniform thickness of each layer. Therefore, the pressure load will be evenly distributed in various positions of the pipe, which ensures stronger pressure resistance.
RIFENG butt welding multilayer pipe guarantee that the aluminum layer and plastic layer stays roundness and uniform thickness of each layer. Therefore, the pressure load will be evenly distributed in various positions of the pipe, which ensures stronger pressure resistance.
Technical specification
Advantage:
• Inherent stability and high bend flexibility
• Excellent hydrostatic stress performance
• Light in weight
• Less pressure loss is ensured by a smooth inner wall.
• Up to 25 years of service life
• Both overlapping and butt welding are options.
Applications:
• Entirely corrosion-resistant.
• A barrier to oxygen and light permeation• Inherent stability and high bend flexibility
• Excellent hydrostatic stress performance
• Light in weight
• Less pressure loss is ensured by a smooth inner wall.
• Up to 25 years of service life
• Both overlapping and butt welding are options.
Applications:
RIFENG Multlayer plumbing system can be used in the following applications:
LPG vapour, natural gas and natural gas liquids.
Standards:
ISO 17484 - Plastics piping systems - Multilayer pipe systems for indoor gas installations with a maximum operating pressure up to and including 5 bar (500 kPa) - Specifications for systems
UNE53008.1-2014 - Plastics piping systems - Multilayer pipe systems for indoor gas installations with a maximum operating pressure up to and including 5 bar (500 kPa) - Specifications for systems
Certificates:
AENOR - refers to ISO 17484
StandardsMark - refers to UNE53008.1-2014
ISO 17484 - Plastics piping systems - Multilayer pipe systems for indoor gas installations with a maximum operating pressure up to and including 5 bar (500 kPa) - Specifications for systems
UNE53008.1-2014 - Plastics piping systems - Multilayer pipe systems for indoor gas installations with a maximum operating pressure up to and including 5 bar (500 kPa) - Specifications for systems
Certificates:
AENOR - refers to ISO 17484
StandardsMark - refers to UNE53008.1-2014
| TYPE | Multilayer Gas Pipe | |||
| B1 (PEX-AL-PEX) | DB1 butt weld (PEX-AL-PEX) | C (PE-AL-PE) | DC butt weld (PE-AL-PE) | |
| Roughness(mm) | 0.0007 | 0.0007 | ||
| Melting point (℃) | － | 127 | ||
| Density (g/cm3) | 0.926-0.959 | 0.941-0.959 | ||
| Modulus of elasticity | 7200 | 7200 | ||
| (MPa) | ||||
| Thermal conductivity | 0.45 | 0.45 | ||
| (w/mK) | ||||
| Coefficient of thermal expansion (mm/mK) | 0.025 | 0.025 | ||
| Material | Test item | Requirement |
| Polyethylene | Density | HDPE：0.941~0.959 g/cm3 MDPE：0.926~0.941 g/cm3 |
| (PEX) | Melt flow index | HDPE、MDPE≥0.1 g/10min(190，2.16kg) |
| Tensile strength | HDPE≥21MPa；MDPE≥14MPa | |
| Enlongation | ≥400% | |
| Vicat soft point | Vicat soft point≥105℃ | |
| Cross-linking degree | ≥65% | |
| ESCR | ≥165h | |
| Color masterbatch | Moisture content | ≤0.15% |
| Appearance | Uniform granual | |
| Volatile content | ≤0.5% | |
| catalyst | Density | ≥0.93 g/cm3 |
| Melt flow index | ≥0.9 g/10min（190℃，5.00kg） | |
| Volatile content | ≤0.35% | |
| Adhesive resin | Appearance | Uniform granual |
| Density | ≥0.926 g/cm3； | |
| Melt flow index | 2.0~6.0 g/10min（190℃，2.16kg） | |
| Vicat soft point | Vicat soft point≥105℃ | |
| T peeling strength | ≥70N/25mm | |
| Aluminum | Surface quality | Water brush test≥class |
| Tensile strength | 105MPa～125MPa | |
| Appearance | Without oil on surface | |
| Hardness(HV) | 28～33 | |
| T peeling strength | Minimum value≥60N/25mm |
| Nominal size(D x e) | 14×2.0 | 16×2.0 | 18×2.0 | 20×2.0 | 25×2.5 | 32×3.0 | 40x4.0 | 50x4.5 | 63x6.0 | 75x7.5 | |
| Outside diameter (mm) | 14 | 16 | 18 | 20 | 25 | 32 | 40 | 50 | 63 | 75 | |
| Tolerance of Outer diameter (mm) | Min | 14.00 | 16.00 | 18.00 | 20.00 | 25.00 | 32.00 | 40.00 | 50.00 | 60.60 | 70.70 |
| Max | 14.20 | 16.20 | 18.20 | 20.20 | 25.20 | 32.20 | 40.40 | 50.50 | 63.00 | 75.00 | |
| Inside diameter(mm) | 10 | 12 | 14 | 16 | 20 | 26 | 32 | 41 | 51 | 60 | |
| Tolerance of Inner diameter (mm) | Min | 9.90 | 11.90 | 13.90 | 15.90 | 19.90 | 25.90 | 30.90 | 39.40 | 49.30 | 57.70 |
| Max | 10.20 | 12.20 | 14.20 | 16.20 | 20.20 | 26.20 | 31.90 | 40.80 | 50.80 | 59.70 | |
| Pipe thickness (mm) | 2 | 2 | 2 | 2 | 2.5 | 3 | 4 | 4.5 | 6 | 7.5 | |
| Tolerance of pipe thickness (mm) | Min | 2.00 | 2.00 | 2.00 | 2.00 | 2.40 | 2.90 | 4.00 | 4.50 | 6.00 | 7.50 |
| Max | 2.25 | 2.25 | 2.25 | 2.25 | 2.70 | 3.20 | 4.60 | 5.20 | 6.80 | 8.50 | |
Compression connections
This fitting allows for the connection of multilayer pipes. On the coupling ends, the union with the polyethylene inner tube is sealed by O-rings placed on the removable insert that is introduced into the fitting body and into the tube. The connection is tightened by the nut with the wrench.
Press connections
Use special tools, phisically press a connection onto the pipe to make an impermeable connection or seal. RIFENG provide 4 different press fittings.
F5 used with U profile crimper
F9 (leakage indicate) used with TH profile crimper
This fitting allows for the connection of multilayer pipes. On the coupling ends, the union with the polyethylene inner tube is sealed by O-rings placed on the removable insert that is introduced into the fitting body and into the tube. The connection is tightened by the nut with the wrench.
Press connections
Use special tools, phisically press a connection onto the pipe to make an impermeable connection or seal. RIFENG provide 4 different press fittings.
F5 used with U profile crimper
F9 (leakage indicate) used with TH profile crimper
