The abrasion pipe of thermal power plant is mainly conveying raw coal powder, ash slag, flue gas desulfurization (FGD) limestone powder and slurry, due to the transmission of medium velocity fast, poor operating conditions, resulting in pipelines, especially elbow, variable diameter pipe serious wear and corrosion, not only consumes a lot of metal materials, but also to the thermal power plant security, economic operation has brought hidden dangers. The abrasion mechanism of pipeline is mainly based on erosion wear.
Wear-resistant pipe can be divided into two categories: single metal pipe and composite pipe.
Power industry wear-resistant pipe variety, pipe code, use characteristics, application range and nominal diameter see the following table
| Types | Wear-resistant pipe code | Usage characteristics and application range | DN/mm |
|---|---|---|---|
| Low alloy wear-resisting cast steel pipe (Single metal pipe) | ZG40GrNiMoG | Good abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe | DN100-1000 |
| ZG45Cr2MoG | Good abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe | ||
| Medium Alloy wear-resisting cast steel pipe | BTMCr30G | Good abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe | DN100-1000 |
| ZG42Cr2Si2MnMoG | Good abrasion resistance, high strength, poor weldability, suitable for pulverized coal and ash pipe | ||
| (Single metal pipe) | BTMCr30G | Good abrasion resistance, corrosion resistance, high strength, can not be welded, suitable for corrosion-resistant wear pipeline | DN30-1200 |
| BTMCr26G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | DN40-1200 | |
| BTMCr20G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | DN100-1000 | |
| BTMCr15G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | ||
| BTMCr12G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | ||
| BTMCr8G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | ||
| BTMCr2G | Good abrasion resistance, low strength, no soldering, suitable for pulverized coal piping | ||
| Anti-abrasion white cast iron （Bimetal Composite Pipe） | BTMCr30-G | Good erosion resistance, high strength, can be welded, suitable for limestone, gypsum, pulverized coal and ash pipe | DN30-1200 |
| BTMCr26-G | Good abrasion resistance, high strength, can be welded, applicable to pulverized coal and ash pipe, used for slurry, coal slurry conveying | DN40-1200 | |
| BTMCr20-G | Good abrasion resistance, high strength, can be welded, applicable to pulverized coal and ash pipe, used for slurry, coal slurry conveying | DN40-1000 | |
| BTMCr15-G | Good abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe | ||
| BTMCr12-G | Good abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe | ||
| BTMCr8-G | Good abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe | ||
| BTMCr2-G | Good abrasion resistance, high strength, can be welded, suitable for pulverized coal and ash pipe | ||
| Inner wall surfacing composite pipe | DNM-IV-G | Excellent abrasion resistance, can be welded, suitable for pulverized coal and ash pipe | ≥DN200 |
| DNM-V-G | Excellent abrasion resistance, can be welded, suitable for pulverized coal and ash pipe | ||
| Alumina ceramic composite lined pipe | Aluminum Thermal MethodTR-G | Wear resistance is very good, high strength, can be welded, easy installation, applicable to pulverized coal and ash pipe, hot air pipe and economizer, hot air pipe, powder conveying, the product cost-effective. | DN32-1200 |
| Ceramic Lined composite steel pipe | |||
| Paste methodTC-G | Good abrasion resistance, high strength, can not be welded, suitable for pulverized coal and ash pipe, desulfurization slurry pipe and variable diameter pipe | ≥DN200 | |
| Rubber composite lined Pipe | XS-G | Good abrasion resistance, high strength, no welding, suitable for operating temperature -40~100℃ slag pipe | DN50-1200 |
| High temperature wear-resisting liner compound pipe | WM-G | Good wear resistance, high strength, can be welded, suitable for working temperature less than 1800 ℃ dry powder pipe, hot air pipe | ≥DN100 |
| Cast stone composite lined pipe | ZS-G | Good abrasion resistance, low casting strength, high brittleness, can not be welded, applicable to pulverized coal and ash pipe, desulfurization slurry pipe | ≥DN40 |
| SIC lined composite pipe | SiC-G | Good abrasion resistance, can not be welded, suitable for pulverized coal and ash pipe, desulfurization slurry pipe | ≤1200 |