Self-propagating High-temperature Synthetic, SHS
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Ceramic lined pipe

Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.

Self-propagating High-temperature Synthetic process

Self-propagating high temperature synthesis (SHS) is used to describe a process in which the initial reagents (usually powders), when ignited, spontaneously transform into products due to the exothermitic heat of reaction.

A well-known example of SHS reaction is the thermite reaction given below:

化学反应式

This reaction generates temperatures above the melting point of alumina and is used in the thermit welding process for joining railway lines.

Several other terminologies - such as combustion synthesis, gasless combustion or self-propagating exothermic reaction - are used to describe the process.

Centrifugal SHS ceramic lined composite steel pipe
production process
Ceramic lined
FE2O3+2Al=2Fe+Al2O3+836KJ/mol
3FE3O4+8AL=9Fe+4AlO3+3265KJ/mol

The types of material that can be formed using this process include metal borides, silicides, carbides, nitrides, sulphides, aluminides and oxides.

Self-propagating High-temperature Synthetic process

Main Properties of Ceramic lined pipe

Sand injection test 30% Transfer test of sludge with SiO2
Material Volume diminution
(cm3)
Material Volume diminution
(cm3)
Ceamic lining
Steel pipe
0.0022 Ceamic lining
Steel pipe
3
Ceramic pipe
Al2O397%
0.0025 S45C 25

The combination of high rigidity of ceramic and high elasticity of steel gives the pipe unmatchable features as an abrasion resistant, heat resistant and corrosion resistant material for use in the fields of power generation, metallurgy, mining, and chemical industry etc.. It has many advantages over steel pipes, cast stone pipes, and steel-plastic compound pipes.

1. Ceramic Lined Steel Pipe and Elbows:

1.1 The Manufacturing Process of Ceramic Lined Steel Pipe and Elbows:
Ceramic (Corundum: a-Al2O3) lined abrasion resistant straight pipe and fittings are lined with highly abrasion resistant ceramic by SHS -------Self-propagating High-temperature Synthetic process.

The composite pipe is composed of three layers: ceramic, intermediate, and steel layers. The ceramic layer is formed by molten alumina at a temperature above 2500 degree.
The molten alumina produced from the reaction Fe2O3+2Al=2Fe+Al2O3 spreads on the inside wall of the steel pipe under the influence of a centrifugal force, then solidifies, so the ceramic layer has high density and smooth surface and bonds to the steel pipe. They are widely used to convey highly abrasive material such as fly ash and any other fine powder material in mine, thermo power generating, coal processing plant, metallurgy, construction, etc. The service life is 10 to 20 times longer than normal steel pipe.

Features and Advantages:

a). High Abrasion Resistant:
Vickers hardness of the corundum lining is HV1100 to1500, as high as that of tungsten-cobalt hard alloys, and the abrasion resistance is 20 times as carbon steel pipes. A composite elbow was used in a mining plant for about fifty thousands hours.

The general service life of common steel elbow is about 700 hours.

b). Corrosion Resistant:
Corundum is a neutral material, and is acid-proof and fouling -free.

c). Heat Resistant:
Ceramic-lined composite steel pipe can work under circumstances of -50 to 800 degrees Celsius.

d). Lower Weight and Convenient Installation:
The ceramic-lined steel composite pipes are lighter than alloy pipes, cast iron pipes, and cast stone pipes and can be welded or connected through flanges, which reduces the expense of transportation and makes the pipes easier to install.
For the pipes with the same sizes, types and length, the weight of ceramic pipe is about 1/2 of the wearable cast alloy steel pipe's, while the cost has reduced 10%~20% per meter. The weight of ceramic lined steel pipe is about 1/3 of the cast stone bent pipe's, 1/2 of the cast stone straight pipe's.

e). Lower Cost:
Ceramic-lined composite steel pipe can take place of expensive stainless steel, titanium, nickel, cast stone or alloy pipes. Extended service life can also reduce maintenance cost.

Features of Alumina Ceramic:

Alumina is a cost effective and widely used material in the family of engineered ceramics. Alumina ceramics have been developed and optimized for maximum wear resistance and corrosion resistance. A high density, diamond like hardness, fine grain structure and superior mechanical strength are the unique properties that make it the material of choice for a wide range of demanding applications. Ceramic has uses similar to Cast Basalt but it has greater resistance to wear in high velocity applications and impact resistance in extreme dynamic Systems

Application of Ceramic lined pipe:
replace cabon steel ,stainless steel and SDR, high wear material discharge. The composite pipes have good corrosion-resistant. There is no evidence of corrosion filling the composite pipes with bitter for one year (left), but the common steel pipe under the same condition is corroded seriously (right).
Advantages of Ceramic lined pipe:
Vickers hardness of the corundum lining is HV1100 to1500, as high as that of tungsten-cobalt hard alloys, and the abrasion resistance is 20 times as carbon steel pipes.

Delivery Time: According to Your Requirement ASAP

自蔓延高温合成技术
自蔓延高温合成技术(self-propagating high-temperaturesyctthesis f 5f}5] technology)又称燃烧合成技术。依靠化学反应合身放热来制备材料的新技术。

即外加能源(电热或激光等)触发点火剂燃烧,进而引发反应物料(气相一固相,固相-固相、液和一同相等)自发高速反应、放出热髦,反应由局部以燃烧波的形式自动蔓延整个体系,最后获得新的合成材料的技术。反应物可以是元素粉末相互直接棍合或元素粉末与气体,也可用金属氧化物和还原剂及非金属粉末的混合物反应生成热能维持反应持续进行、反应产物必须是稳定的化合物、.该技术具有产物纯度高、设备简单、能耗低‘生产灵活等优点,缺点是工艺参数控制要求较严。已用此法制备出数百种化合物,像各种金属的氮化物、碳化物、硼化物、硅化物、氧化物、氢化物等。S}-IS技术已发展成SH5制粉技术、SHS烧结技术、5H5致密化技术、5HS熔铸技术、5H5焊接技术、SHS涂层技术等。
Properties of the Ceramic-lined Steel Composite Pipes >>
Ceramic (Corundum: a-Al2O3) lined abrasion resistant straight pipe and fittings are lined with highly abrasion resistant ceramic by SHS ----Characteristics of SHS self-burning ceramic composite pipe
Abrasion resistant pipe specification, Standard and identification

Classification and designation
of wear-resistant pipes
for power industry


Pipe elbows be Long-term
use in power plants

Because the outer surface behaves like mild steel, the product can be cut and welded with proper procedure in the field, configured into a variety of fittings, and can accept the standard end options of flanges, weld rings and couplings.

Abrasive Applications

One-hundred-twenty-nine-million tons of coal ash—a byproduct of the coal burning process—is produced every year. Most power plants transport the coal ash in liquid form to large surface impoundments or in solid form at landfills near the facility through long lengths of steel piping, which can range in length from several thousand feet to miles.

Wear-resisting comparative table of ceramic lined pipe
Sand injection test 30% Transfer test of sludge with SiO2
Material Volume diminution
(cm3)
Material Volume diminution
(cm3)
Ceramic lined
Steel pipe
0.0022 Ceramic lined
Steel pipe
3
Ceramic pipe
Al2O397%
0.0025 S45C 25
Application of Abrasion resistant pipe

Abrasion resistant pipe applied in coal-fired power plant ash and slag discharge tube, powder, powder tube, desulfurization pipeline,in addition also widely used in the following industries:

Q&A

Warranty

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The warranty is determined to each creator and the maximum duration maximally in service. Should any of the RS fail within the warranty period, We'll replace or repair the defective product (s) at No. end user. Please contact the Sunny steel for details on the How to obtain a warranty for our products.

Inspections

As part of our quality regimen, 100% of incoming raw materials, semi-finished products, as well as finished products are thoroughly inspected prior to being entered into our inventory. We have established multiple hold points throughout fabrication as well as a comprehensive final inspection for all products.



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