Advantages:
• Entirely corrosion-resistant
• A strong barrier against oxygen and light
• Inherent stability and high bend flexibility
• Excellent hydrostatic stress performance
• Lightweight
• Less pressure loss is ensured by a smooth inner wall
• Up to 25 years of service life
• Both overlapping and butt welding are available
Applications:
RIFENG Multilayer plumbing system can be used in the following applications: LPG vapor, natural gas, and natural gas liquids.
Standards:
EN ISO 21003 - Multilayer piping systems for hot and cold water installations inside buildings
ASTM F1281 - Standard Specification For Crosslinked Polyethylene/Aluminum/Crosslinked Polyethylene (PEX-AL-PEX) Pressure Pipe.
BRL-K536 E - Plastics piping systems of PE-X/Al intended for the transport of cold and heated drinking water
DVGW W 534 (P) - Pipe Connectors and Pipe Joints in Drinking Water Installation
DVGW W 542 - COMPOUND PIPES IN THE DRINKING WATER INSTALLATION; REQUIREMENTS AND TESTING
DVGW W 270 - A method for the assessment of enhancement of microbial growth on non-metallic materials in contact with drinking water
UBA KTW - about Hygienic property of material odor test
UBA ELASTOM - Guideline for hygienic assessment of elastomers in contact with drinking water
AS 4176.2 & 3 - Multilayer piping for pressure applications - Multilayer piping systems for hot and cold water plumbing applications- PIPES & FITTINGS
XP P41-250 - Effect of materials on the quality of water intended for human consumption - Organic materials
NSF /ANSI /CAN 61 - Health Effects of Drinking water system components
Certificates:
AENOR - refers to EN ISO 21003
NF - refers to ISO EN ISO 21003
QB - refers to EN ISO 21003
KIWA - refers to BRL-K536 E
DVGW - refers to DVGW W 534 (P), DVGW W 542, DVGW W 270, UBA KTW, UBA ELASTOM
ACS - refers to XP P41-250
WaterMark - refers to AS 4176.2 & 3
NSF - refers to ASTM F1281 and NSF /ANSI /CAN 61
WRAS - refers to Regulators’Specification
STF - refers to EN ISO 21003
ISO 9001:2015 – “Quality management system”


TYPE |
Multilayer Pipe |
|
|
|
Overlapped welded |
A(PE-AL-PE) |
B1 (PEX-AL-PEX) |
B (PERT-AL-PERT) |
C (PE-AL-PE) |
Roughness(mm) |
0.0007 |
0.0007 |
0.0007 |
0.0007 |
Melting point (℃) |
135 |
- |
127 |
127 |
Density (g/cm3) |
0.941-0.959 |
0.926-0.959 |
0.926-0.940 |
0.941-0.959 |
Modulus of elasticity
(MPa) |
7200 |
7200 |
7200 |
7200 |
Thermal conductivity
(w/mK) |
0.45 |
0.45 |
0.45 |
0.45 |
Coefficient of thermal expansion (mm/mK) |
0.025 |
0.025 |
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 the tube. The connection is tightened by the nut with a 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
F17 used with U, TH, H, RFZ profile crimper
F18 (leakage indicate) used with U, TH, H, RFZ profile crimper