Ceramic Composite Steel Pipe

Applicable to material conveying pipelines with severe wear and scouring, such as mine backfill, concentrate, and tailings transportation; pulverized coal feeding, coal powder, ash removal, slag discharge, desulfurization, and dust removal pipelines in coal-fired power plants; water-quenched slag, blast furnace injection, steelmaking red mud, sintered white ash, and dust removal pipelines in steel enterprises; raw meal, clinker, cement, coal powder, and dust collection in the cement industry, as well as aluminum liquid and titanium dioxide powder conveying pipelines in other industries.

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Product Details

1. Application Scope

2. Product Introduction

The ceramic-lined composite steel pipe is composed of corundum ceramic (Al2O3) layer, transition layer, and steel pipe layer from inside to outside. The ceramic layer is formed by molten alumina above 2600°C under centrifugal force, uniformly infiltrated and composited on the inner wall of the steel pipe, creating a dense, smooth ceramic layer integrated with the steel pipe.

The ceramic steel pipe produced by self-propagating high-temperature synthesis centrifugal technology has a stable organizational structure. Based on years of use in electric power, coal, metallurgy, mining, building materials, and other industrial sectors, compared with ordinary seamless steel pipes, the service life of the ceramic-lined composite steel pipe increases by more than ten times. It can replace cast stone pipes, alloy pipes, organic material lined pipes, etc., and is an ideal wear-resistant and high-temperature resistant pipeline.

3. Reference Straight Pipe Dimensions

Nominal Diameter DN	Pipe Diameter φ (mm)	Length L(1)	Length L(2)	Steel Thickness δ2	Ceramic Thickness δ3
50	73, 76	2000	3000	8	4
65	83	2000	3000	8	4
80	89, 95, 102	2000	3000	8	4
100	108, 114, 121, 127	2000	3000	8	4
125	133, 140, 146, 152	2000	3000	8	4
150	159, 168		3000	8	4
150	180		3000	10	≥4
175	194, 203		3000	10	≥4
200	219, 232		3000	10	≥4
225	245, 253		3000	10	≥4
250	273, 280		3000	10	≥4
275	299, 310		3000	12	≥4
300	325, 343, 351		3000	12	≥4
350	377, 402		3000	12	≥4
400	426		3000	12	≥4
450	480	2000		12	≥4
500	530	2000		12	≥4
600	630	2000		14	≥4
700	720	2000		16	≥4
800	835	2000		16	≥4
900	920	2000		16	≥4

4. Wear Resistance

Sandblasting Comparison Test

Material	Volume Reduction
97% Alumina Pipe	0.0025
Ceramic-Lined Composite Pipe	0.0022

30% SiO2 Slurry Scouring Comparison Test

Material	Volume Loss
45# Steel	25
Ceramic-Lined Composite Pipe	3

5. Physical & Mechanical Properties

Item Data / Material	Vickers Hardness HV (kg/mm²)	Crushing Strength (MPa)	Specific Gravity (g/cm³)	Compressive Shear Strength (Mpa)	Mechanical Impact Resistance (Times)	Thermal Shock Resistance (°C)	Surface Quality	Water Flow Resistance Coefficient
Carbon Steel Pipe	149	411	7.85					0.0195
Ceramic-Lined Composite Pipe	1100~1400	300~650	4.6~4.7 (incl. transition layer)	15~30	15+ times	900	Smooth	0.0193

Notes:

Ceramic-lined composite steel pipe thickness 9mm, mechanical energy 50J, number of impacts causing cracks in the ceramic layer upon contact.
Heated and quenched three times, temperature at which cracks appear in the ceramic layer.

6. Ash Conveying Resistance Test

Comparison Pipe	Roughness (△)	Relative Roughness (△/D)	Water Flow Resistance Coefficient
	Hydraulic Conveying	Pneumatic Conveying	Hydraulic Conveying
Ordinary Pipe	0.119	1.2	7.935×10⁻⁴
Ceramic-Lined Composite Pipe	0.0118	0.195	7.935×10⁻⁴

7. Product Features

1. Excellent Wear Resistance:

The inner layer is corundum ceramic with Mohs hardness above 9.0, equivalent to HRC90 or more, thus providing high wear resistance for any medium conveyed in electric power, coal, metallurgy, and mining industries.

2. Low Running Resistance Loss:

Due to the smooth inner surface and permanent rust-free property, there are no convex spiral lines on the inner surface like those found in seamless steel pipes.

3. Low Engineering Cost:

Light weight reduces support/hanger costs and handling expenses. The total engineering cost of ceramic composite steel pipes is equivalent to cast stone pipes, and 20%~30% lower compared to wear-resistant steel pipes.

4. Good Temperature Resistance:

Long-term normal operation within the temperature range of -50~900°C, with a material expansion coefficient of 6~8×10⁻⁶/°C.

5. Easy Installation:

The product has excellent comprehensive performance such as heat resistance and mechanical impact resistance, making construction and installation convenient, which can reduce installation costs.