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Abrasion resistant pipe

陶瓷复合耐磨管性能表

陶瓷钢管与传统的钢管、耐磨合金铸钢管、铸石管以及钢塑、钢橡管等有着本质性区别。陶瓷钢管外层是钢管,内层是刚玉。刚玉层维氏硬度高达100—1500(洛氏硬度为90-98),相当于钨钴硬金。耐磨性比碳钢管高20倍以上,它比通常粘接而成的刚玉砂轮性能优越得多。

现在刚玉砂轮仍是各种磨床削淬火钢主要砂轮。陶瓷钢管中刚玉层可把刚玉砂轮磨损掉。陶瓷钢管抗磨损主要是靠内层几毫米厚的刚玉层,其莫氏硬度为9,仅次于金刚石和碳化硅,在所有氧化物中,它的硬度是最高的。

表1 耐磨陶瓷管的物理机械性能

材料 硬度HV 压溃强度(1)
MPa
比重 g/cm3 抗压剪切强度(2)
MPa
绝对粗糙度
mm
线膨胀系数(3)
X10-6K-1
耐磨陶瓷管 1100~1400 350~400 4.6~4.7含过渡层 15 DN≤150为0.35
DN>150为0.12
8.5~9
20#钢管 149 411 7.85   新的0.05~0.1
旧的0.4~0.6
14~15

注:
(1)无缝钢管厚8mm,陶瓷层和过渡层总厚度2.5-3.5mm,从管外把管内陶瓷压碎时的强度。
(2)在耐磨陶瓷管轴向把陶瓷层从无缝钢管内压出时的强度。
(3)温度范围-30~~500℃.

表二、耐磨陶瓷管抗热冲击性能和抗机械冲击性能。

材料
抗机械冲击数(1)
抗热冲击出现裂纹的淬水次数(2)
200℃
300℃
450℃
700℃
1000℃
1100℃
陶瓷钢管
15次以上
10次以上
9次
6次
5次
3次
1次出现小裂纹和剥落
耐热陶瓷
1次即碎
2次
1次即碎
1次即碎
1次即碎
1次即碎
1次即碎

注:
(1)耐磨陶瓷管总厚度9mm,机械能50J,点接触管体内陶瓷层生产裂纹的冲击次数。
(2)在各给定温度下加热5分钟淬水,再加热再淬水……

表三、输送铁矿精粉耐磨对比试验。

材料
时间
磨损掉尺寸mm
平均年磨损率mm/a
平均年磨损率比值
耐磨陶瓷管
1994年4月~1997年4月
0.12
0.04
 
20#碳钢管÷耐磨陶瓷管=175
 
20#碳钢管
1994年~1997年4月
翻身一次换管一次共21mm
7

注:
(1)该矿重选车间管道,矿石粒度〈2mm重量浓度30%。
(2)耐磨陶瓷管外径φ219,厚8mm,陶瓷层厚4mm,20#碳钢管厚9mm。
(3)此对比试验目前仍在继续进行,比值175只是根据三年实践的推算数据。

表四、火电厂送粉管路不同材质弯管对比试验
工况:10 万KW机组,使用煤碳灰达45%,每管每小时送粉42吨

材料
规格
使用说明
20#碳钢管
DN350×10
11个月磨穿
高铬合金铸钢管
DN350×25
11个月磨穿
夹套式铸石管
DN350×55
使用23个月磨穿
耐磨陶瓷管
DN350×14
使用24个月磨损掉0.2mm

表五、火电厂气力除灰管路不同材料弯管对比试验
工况:气力输送干灰,74吨/时,流速20m/s,浓度28%,位置在进灰度拐弯处。

材料
规格
使用说明
20#碳钢管
DN150×10
3个月磨穿
高铬合金铸钢管
DN150×20
5个月磨穿
夹套式铸石管
DN150×50
使用12个月磨穿
耐磨陶瓷管
DN150×11
使用12个月磨损掉0.15mm

表六、耐磨陶瓷管耐蚀性(按不锈钢测试标准,30天,室温)
 
材料
10%
HCL
g/m2*h
10%
HNO3
g/m2*h
10%
H2SO4
g/m2*h
10%
H3PO4
g/m2*h
10%
C2H4O2
g/m2*h
10%
HF
g/m2*h
10%
NaOH
g/m2*h
10%
NaCl
g/m2*h
耐磨陶瓷管
0.056
0.032
0.021
0.047
0.022
0.42
-0
-0
不锈钢
1Cr18Ni9Ti
>1
0.1
1.8
<0.1
<0.1
-
0.1
-

表七、耐磨陶瓷管在各种浓度硫酸中耐蚀性(30天,室温)

硫酸浓度
10%
20%
30%
40%
50%
60%
70%
80%
耐磨陶瓷管
晶介腐蚀速度
mm/a
<0.1
<0.1
1.2
3.6
1.8
<0.1
<0.1
<0.1
失重
g/m2*h
0.021
/
/
0.04
/
/
/
/


晶介腐蚀速度
mm/a
0.021
/
/
0.04
5.0
/
/
0.46
失重
g/m2*h
1.8
/
/
/
4.6
/
/
0.42
注:不锈钢1Cr18Ni9Ti
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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