Polyolefin composite wear-resistant pipe

I. Introduction

Polyolefin composite wear-resistant pipe is a wear-resistant

pipe with polyolefin wear-resistant material as the

wear-resistant layer, which is formed by co-extrusion with

the base pipe. 

It has a long-term working temperature below 45°C

and is an ultra-high performance wear-resistant pipe for conveying

various liquids, slurries, and granular solids with wear resistance

requirements.

Polyolefin composite wear-resistant pipe

II. Name/Term

2.1 Polyolefin wear-resistant material:

Material with polyolefin as the main body that has both 

wear resistance and processability.

2.2 Wear-resistant layer:

The inner layer of the pipe has a certain thickness and

wear resistance made of polyolefin wear-resistant material.

2.3 Base pipe:

The pipe body of the polyolefin composite is wear-resistant

pipe without the wear-resistant layer.

2.4 Polyolefin composite wear-resistant pipe:

The pipe material is co-extruded with high-density polyethylene

as the base pipe and polyolefin wear-resistant material.

3. Schematic diagram of the structure of polyolefin composite

wear-resistant pipe

Schematic diagram of the structure of polyolefin composite

wear-resistant pipe

1-wear-resistant layer 2-polyethylene layer

4. Technical indicators

4.1 Color

The color of the wear-resistant layer is different

from the color of the base pipe. The wear-resistant layer

is normally white, and the base pipe is generally black.

4.2 Dimensions and deviations of the base pipe

The base pipe dimensions and deviations of polyethylene

wear-resistant pipes comply with the provisions of GB/T 13663.2.

4.3 Length of base pipe

The pipe length is generally 6m, 9m, 12m, and can also be

agreed upon by both the supply and demand parties.

Wear-resistant layer performance index

Serial number

Item

Indicator

Test method

1. Density, g/cm³

0.90±0.02

GB/T 1033.1-2008

2. Melt mass flow rate (190℃/2.16kg), g/10min

0.50±0.20

GB/T 3682.1-2018

3. Tensile strength, MPa

≥20

GB/T 1040.3-2006

(Type 5 dumbbell specimen)

4. Tensile strain at break, %

≥600

5. Low-temperature impact embrittlement temperature, ℃

≤-40

GB/T 5470-2008 (Method A)

6. Oxidation induction time (200℃), min

≥30

GB/T 19466.6-2009

7. Mortar wear rate, %

≤0.30

Application scope of polyolefin composite wear-resistant pipes:

Chemical industry: such as coal powder, silicon powder,

salt slurry, alkali slurry, and other solid-liquid mixture

transportation pipelines;

Electricity: such as thermal power ash removal, slag discharge,

powder delivery, powder return, desulfurization process pipelines;

Metallurgy: such as concentrate slurry, tailings long-distance

pipeline transportation, mineral and solvent process pipelines

in ore dressing plants;

Cement: such as raw slurry transportation, coal powder transportation,

elevator unloading, finished cement pneumatic transportation and

loading and unloading, concrete transportation pipelines in

rotary kiln wet production line;

Pipeline connection method: buckle flange connection

Polyolefin composite wear-resistant pipe connection method