Light Weight Steel Plastic Composite Pipe Strong Coating Adhesion
For Mine
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) Internal and external coatings can be made of different
materials or colors according to customer's service environment and
requirements.
2) Coating adhesion is strong: physical method is used for advanced
treatment of the base pipe. The pretreatment meets Sa2.5 standard.
Microcomputer is used for automatic preheating control and
production. Coating adhesion is higher than national standard.
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 |
