Pipeline information:
Nominal diameter from 90mm to 1200mm .
Nominal pressure up to 15.0 MPa.
The pipe has a threefold safety factor (safety factor is not less than 3).
Operating temperature of the pump: -40....+5 5 ℃.
Length of supplied pipe: 6m, 8m, 10m, 12m or as per order requirement.
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Three Key Technologies for Solving Pipe Wear Problems
1) Material modification technology;
2) Wear-resistant material technology;
3) Steel-plastic composite technology.
Pipeline design
*Key Materials Technology: Specialized materials for wear-resistant pipes
Principles of creating wear-resistant materials (polyether)
*Methods for increasing wear resistance of polymeric materials
a) Reduces the coefficient of friction of the material and reduces friction ;
F = m × P
-- Coefficient of friction of PTFE material makes up 0 . 04 is the least friction
polymer materials;
b) Increasing the hardness of the surface of the material ;
c) Reduction of contact compressive stress ;
d) Reduction of surface roughness of the material ;
e) The material of the friction vice should be selected with a large difference in hardness ;
f) Improve the match between surface hardness and toughness (material selection).
Tin bronze coated steel wire
* GB/T14450-2008 "Steel wire for beads" is divided into 3 types: purple copper plated, tin bronze plated and brass plated, and purple copper plated was withdrawn from the market. GB/T14450-2016 version removes part of the purple copper plating and brass coating, and only preserves the tin bronze coating.
* Coating on one side to play a role of preventing corrosion, on the other hand, to play a role in increasing the shear strength of steel wire and resin binder. The test results showed that the average value of shear strength of steel wire with tin-bronze coating is 20.69 MPa, and steel wire with brass coating - 11.42 MPa. There is a large difference in shear strength between various coated steel wires with resin bonding, so we choose tin-bronze coated steel wire as a supporting base.
Tensile strength ≥15 N/mm No delamination of stretched pipes
Method:
1) Coupling connection ( at a pressure not exceeding 3.5 MPa and see diameters )
2) Flange connection
3) Quick - release coupling (QRC )
a ) If the pressure is not higher than 2.0 MPa, an electric welded flange is used.
b) If the pressure is above 2.0 MPa, a metal collar is used.
c ) Use of quick-release couplings in accordance with the working conditions
Application areas
● Mine: transportation of pulp and slurry;
● Chemical industry: transportation of solid-liquid mixtures (powder, suspension), such as coal powder, silicon powder, salt suspension, alkali suspension, and other raw materials. Transportation of aggressive media containing solid particles.
● Power plant: ash removal, slag removal, powder feeding, powder return, desulfurization, etc.
● Coal mines: transportation of coal water suspension, coal washing slurry, mine filling, coal powder, etc.
● Cement: raw material transportation, powdered coal transportation, finished cement transportation, etc.
● Metallurgy: customer of blast furnace coal, delivery of slag, etc.
● River dredging: Dredging of rivers, lakes and seas, pumping and removal of sand.
Binding resins
|
No. |
Item |
E unit |
Requirements |
Test methods |
|
1 |
Mass flow rate of melt |
g/10 min |
1.5~3.0 |
GB/T 3682 |
|
2 |
Vicat softening temperature. |
℃ |
≥115 |
GB/T 1633 |
|
3 |
Tensile yield strength |
MPa |
≥18 |
GB/T 1040 |
|
4 |
Nominal strain at break |
% |
≥500 |
GB/T 1040 |
|
5 |
Density |
g/cm3 |
0.93~0.96 |
GB/T 1033 |
|
6 |
Oxidation induction time |
min |
≥20 |
GB/T 19466.6 |
|
7 |
moisture content |
% |
≤0.1 |
GB/T 6284 |
|
8 |
180° Peel Resistance |
N/25mm |
≥100 |
GB/T 2790 |
|
9 |
Shear strength of resin binder and steel wire |
MPa |
≥13 |
GB/T32439
|
* The binder resin is the key to this product, which is the smooth realization of the pipe pressure and stress transmission process. Composite pipes are key materials. The performance of the binder resin largely determines the quality level of the product. Our company has a dedicated raw material design and development platform to improve the binder resin and process, and ensure that the equipment meets the target.
Tensile strength ≥15 N/mm No delamination of stretched pipes
Property of the PAT pipeline with a layer.
1 ) The raw material of the pipe is inert material, light weight, double-sided corrosion resistance;
2 ) The pipe has excellent wear resistance, smooth inner surface, friction coefficient of 0.07-0.09;
3 ) The pipe belongs to high-strength flexible pipes, has good impact resistance, the safety factor of the pipe is 3 times;
4 ) The elongation at break of the pipe raw material is ≥ 600 %, so the pipe has high flexibility, can be laid with bending, or laid on water;
5 ) The pipe is made by co-extrusion method, the overall structure is non-layered, with excellent resistance to cracking under environmental influence.
6 ) It is suitable for long-distance transportation of abrasive and corrosive media, and the project cost is low;
7) The pipes are resistant to atmospheric influences, do not require insulation, and their thermal conductivity is 1/200 of the thermal conductivity of steel.
8 ) Simple construction, no further maintenance.
9 ) The equivalent roughness of the inner wall of the pipeline is within the limits 0.0015-0.015 ram , smooth inner wall, no plaque, transportation resistance small, but the energy saving effect is good.
