Polyethylene Coating Steel Plastic Composite Pipe ISO / CE
Certificate
Mine pipe refers to a product specially developed for special
underground environmental conditions, which has the advantages of
flame retardant, antistatic, corrosion resistance, long service
life and strong safety. It is mainly used in five systems: mine
drainage pipe (KS), mine grouting pipe (KJ), mine positive pressure
air pipe (KFZ), mine negative pressure air pipe (KFF), mine gas
drainage pipe (KW).
size:HOSP-TEP(PE)-KW(-0.097)/101.6～1118
size:DN100mm～DN1000mm
Pressure Grade
Pipeline for gas drainage in underground coal mine, bearing
pressure - 0.097 - 1.0 MPa.
Performance characteristics
1) Light weight of pipe: the base pipe is spirally welded
corrugated steel pipe, which is thinner than other pipes of the
same specification and type. It greatly reduces the weight of pipe
and is convenient for transportation and installation in
underground coal mine. It reduces the labor intensity and improves
the construction efficiency.
2) High stiffness of pipe ring: high negative pressure performance,
ring stiffness to meet SN16.
3) Chemical corrosion resistance, weathering resistance and aging
resistance are very high: the coating can prevent metal oxidation,
and has the corrosion resistance of acid, alkali and salt. The
product has excellent anti-aging performance, and its service life
is much higher than other pipes. The product can be painted with
flange to ensure the anticorrosion effect of the whole pipeline.
National Standard Specification and Coating Thickness
| DN | internal coating | external coating |
| Ordinary level | Reinforcement level | polyethylene | epoxy resin |
| Ordinary level | Reinforcement level | Ordinary level | Reinforcement level |
| 15 | ＞0.4 | ＞0.3 | ＞0.5 | ＞0.6 | ＞0.3 | ＞0.35 |
| 20 |
| 25 |
| 32 |
| 40 |
| 50 |
| 65 |
| 80 | ＞0.5 | ＞0.35 | ＞0.6 | ＞1.0 | ＞0.35 | ＞0.4 |
| 100 |
| 125 |
| 150 |
| 200 | ＞0.6 | ＞0.8 | ＞1.2 |
| 250 |
| 300 |
| 350 | ＞1.3 |
| 400 |
| 450 |
| 500 |
| 550 | ＞0.8 | ＞0.4 | ＞1.0 | ＞1.5 | ＞0.4 | ＞0.45 |
| 600 |
| 650 |
| 700 |
| 750 |
| 800 | ＞1.0 | ＞0.45 | ＞1.2 | ＞1.8 | ＞0.45 | ＞0.5 |
| 850 |
| 900 |
| 1100 |
| 1200 |
| 1400 |
| 1600 |
| Remarks | Seamless steel pipe, spiral welded pipe and straight welded pipe
can be selected as the base pipe, and the thickness of plastic
coating can be processed according to customer's requirements. |
Properties of Polyethylene Powder
| Item | Requirement | Test method |
| Density(g/cm2) | ＞0.91 | GB/T 1033 |
| tensile strength /MPa | ＞9.80 | GB/T 1040 |
| elongation at break /% | ＞300 | GB/T 1040 |
| vicat softening point /℃ | ＞85 | GB/T 1633 |
| nonvolatile content /% | ＞99.5 | GB/T 2914 |
| Hygienic performance | Conform to GB/T 17219 |
