Standard：CJ/T 225-2011
Ring stiffness：SN8,SN10,SN12,SN16
Size:DN300~2600mm
Length：6meter or customization.
Color：black inside and out side,other color customization accepted.
Pipe advantages
l SRPE corrugated pipe is intended for surface and subsurface drainage applications where soil provides support to its flexible walls.
l Its major use is to collect or convey drainage water by open gravity flow as culverts, storm drains, etc.
l high ring stiffness: all specifications of pipe ring stiffness up to SN 10 or more.
l Material cost saving, compared with the same diameter and ring stiffness of all plastic buried drainage pipe can significantly reduce the cost.
l The perfect combination of steel and plastic, the use of unique bonding materials, in the state of melting composite, the overall performance of the pipe is very reliable.
l Excellent performance, reliable seal, long service life, flexible anti-seismic, light weight, convenient and fast construction
Application
l Urban underground drainage, sewage pipelines;
l Industrial drainage, sewage pipelines;
l Seawater, rainwater transmission pipelines;
l Catchment systems, seepage systems pipelines;
l Agricultural irrigation water pipelines;
l Manufacture of chemical process containers, etc. .
Properties of polyethylene (PE) resin
NO. | Item | Requirements | Testing method |
1 | 80 ℃,4.5 MPa,165 h 80 ℃,4.0 MPa,1000 h | No break, No leaking | GB/T 6111 the end of type a |
2 | Tensile strength/MPa | ≥20.7 | GB/T 8804.3 |
3 | Young's Modulus/MPa | ≥758 | GB/T 9341 |
4 | MFR(5kg,190 ℃)/(g/10 min) | ≤1.0 | GB/T 3682 |
5 | Oxidation conduction time(200 ℃)/min | ≥20 | GB/T 17391 |
6 | Carbon black content/% | ≥2.0 | GB/T 13021 |
7 | Density/(g/cm³) | ≥930 | GB/T 1033.1 |
8 | Resistance to environmental stress cracking(F50)b/h | ≥1000 | GB/T 1842 |
Performance of adhesive resin
NO. | Item | Requirements | Testing method |
1 | Density/(g/cm³) | 0.930～0.950 | GB/T 1033.1 |
2 | MFR(2.16 kg,190 ℃)/(g/10 min) | 2.5~ | GB/T 3682 |
3 | the peel strength (23 ℃±2 ℃)/(N/cm) For the peel strength between the adhesive resin and the steel strip | ≥100 | CJ/T 225-201 Appendix A |
4 | ash content/% | ≤0.1 | GB/T 9345.1 |
5 | Oxygen permeability(Film thickness 2 mm)/(mL/m²/d) | ≤25 | GB/T 19789 |
6 | Resistance to water immersion/d | ≥180 | CJ/T 225-201 Appendix B |
7 | Oxidation induction time(200 ℃)/min | ≥20 | GB/T 1739 |
8 | Embrittlement temperature/℃ | ≤-50 | GB/T 5470 |
9 | Vicat softening temperature VST/℃ | ≥110 | GB/T 1633 |
Main mechanical properties of steel belt
NO. | Item | Requirements | Testing method |
1 | Yield strength/MPa | Galvanized strip | 190~280 | GB/T 228 |
cold-rolled strip | 160~230 |
2 | Tensile strength/MPa | Galvanized strip | 290~400 |
cold-rolled strip | 270~380 |
3 | Elongation% | >26 |
Physical and mechanical properties
NO. | item | Requirement | Test method |
1 | Ring stiffness./ (kN/m²) | SN8 | ≥8 | GB/T9647-2003 |
SN10 | ≥10 |
SN12.5 | ≥12.5 |
SN16 | ≥16 |
2 | Drop weight impact test (TIR),% | ≤10 | GB/T14152 |
3 | Peel Strength (23 ℃±2 ℃)/(N/cm) | ≥100 | CJ/T 225-2011 8.4.3 |
4 | Ring flexibility | No rupture, no detaching of both walls | GB/T9647 |
5 | Oven test | No layering, no cracking | CJ/T 225-2011 8.4.5 |
6 | Tensile strength of seam N | 300≤DN/ID≤500 | ≥600 | GB/T8044 |
600≤DN/ID≤800 | ≥840 |
900≤≤DN/ID≤1200 | ≥1020 |
1300≤≤DN/ID≤2000 | ≥1460 |
2200≤DN/ID≤2600 | ≥1600 |
7 | Creep ratio | ≤2 | GB/T8042 |
Specification
1-Outer layer, polyethylene
2-Steel strip
3-Adhesive resin
4-Inside layer, polyethylene
NO. | DN/ID | Minimum mean internal diameter d im ,min | Minimum inner wall thickness e1,min | Minimum laminate wall thickness emin | Maximum pitch P max | Minimum steel strip thickness t min | Minimum thickness of Anti-corrosion coating e2,min |
1 | 300 | 294 | 2.5 | 4.0 | 75 | 0.4 | 2.2 |
2 | 400 | 392 | 3.0 | 4.5 | 85 | 0.4 | 2.2 |
3 | 500 | 490 | 3.5 | 5.0 | 100 | 0.5 | 2.5 |
4 | 600 | 588 | 4.0 | 6.0 | 110 | 0.5 | 2.5 |
5 | 700 | 685 | 4.0 | 6.0 | 115 | 0.5 | 2.5 |
6 | 800 | 785 | 4.5 | 7.5 | 120 | 0.7 | 3.0 |
7 | 900 | 885 | 5.0 | 7.5 | 135 | 0.7 | 3.0 |
8 | 1000 | 985 | 5.0 | 8.0 | 150 | 0.7 | 3.0 |
9 | 1100 | 1085 | 5.0 | 8.0 | 165 | 0.7 | 3.0 |
10 | 1200 | 1185 | 5.0 | 8.0 | 180 | 0.7 | 3.0 |
11 | 1300 | 1285 | 5.0 | 8.0 | 210 | 1.0 | 3.0 |
12 | 1400 | 1385 | 5.0 | 8.0 | 210 | 1.0 | 3.0 |
13 | 1500 | 1485 | 5.0 | 8.0 | 220 | 1.0 | 3.0 |
14 | 1600 | 1585 | 5.0 | 9.0 | 230 | 1.0 | 3.5 |
15 | 1800 | 1785 | 5.0 | 9.0 | 230 | 1.0 | 3.5 |
16 | 2000 | 1985 | 6.0 | 9.0 | 235 | 1.0 | 3.5 |
17 | 2200 | 2185 | 6.0 | 9.0 | 235 | 1.2 | 3.5 |
18 | 2400 | 2385 | 6.0 | 10.0 | 235 | 1.2 | 3.5 |
19 | 2600 | 2585 | 6.5 | 10.0 | 240 | 1.2 | 3.5 |
