Cr25Ni20 Tube Shield
Cr25Ni20 Tube Shield - seamless steel tube
Integral stamped wave form boiler water wall anti-wear baffle, buffer flue ash scouring, long service life for circulating fluidized bed power station furnace protection.
Wave shaped water wall anti-wear plate is a special stamped boiler furnace protection component, exclusively designed for circulating fluidized bed (CFB) boiler water wall severe abrasion zones. It adopts integral one-time stamping and bending molding to form continuous multi-stage wavy buffer structure, installed on the fin area between water wall tubes.
The unique wavy surface can split and buffer the high-speed circulating ash particle airflow inside the furnace, change the direct impact angle of solid particles on the water wall tube surface, greatly reduce local concentrated abrasion of furnace tubes caused by flue gas scouring. Different from conventional straight flat erosion shields, the wave buffer design can extend the overhaul cycle of CFB boilers by more than double.
This anti-wear baffle is a core matched wear protection part under the tubes erosion shield product line, widely used for abrasion reconstruction of dense phase zone, dilute phase transition zone and arch outlet of CFB power station boilers, biomass boilers and waste incineration boilers.
| Steel Grade | Max Continuous Service Temp | Core Feature & Suitable Working Condition |
|---|---|---|
| Q235 Carbon Steel | ≤400℃ | Cost-effective, for low-temperature dilute phase abrasion zone of biomass boilers |
| 1Cr13 Martensitic Stainless Steel | ≤550℃ | Medium temperature oxidation resistance, conventional small CFB boiler transition zone |
| 309S Heat Resistant Stainless Steel | ≤850℃ | Excellent anti-oxidation, mainstream choice for medium-large circulating fluidized bed boilers |
| 310S High Temperature Stainless Steel | ≤1050℃ | Superior high temperature corrosion resistance, for furnace arch outlet & dense phase severe abrasion zone |
Material Selection Tip: 309S wave anti-wear plate is the most popular general model for standard coal-fired CFB power plant boilers.
| Plate Thickness (mm) | Single Wave Height (mm) | Standard Total Width (mm) | Customizable Length Range (mm) |
|---|---|---|---|
| 6 | 15 / 20 | 120 / 150 | 300 ~ 2000 |
| 8 | 20 / 25 | 150 / 180 | 300 ~ 2500 |
| 10 | 25 / 30 | 180 / 200 | 300 ~ 3000 |
Non-standard wave height, ultra-thick plate and special width can be fully customized according to customer boiler water wall construction drawings.
The wave shaped anti-wear plate works with semi-circular tube shields to form a full set of layered furnace anti-abrasion protection scheme for CFB boilers.
| Product Name | Structural Feature | Core Application Position |
|---|---|---|
| Wave Shaped Water Wall Anti-wear Plate | Multi-wave buffer stamping baffle | Water wall fin transition abrasion zone of CFB boiler |
| Finned Tube Shields | Special wrapped shield for finned heat exchange tubes | Boiler economizer finned tube bundle |
| Comb-shaped Boiler Tube Shield | Comb tooth split structure for dense tube bundle | Compact superheater tube row gap |
| U-shaped Shield | U-shaped full wrap semi-circular protective cover | Single straight boiler tube severe abrasion position |
Core installation position: The fin connecting area between adjacent water wall tubes, which bears long-term lateral impact of high-speed circulating ash particles inside the furnace.
| Performance Item | Wave Shaped Water Wall Anti-wear Plate | Ordinary Straight Flat Erosion Shield |
|---|---|---|
| Particle Impact Buffering Capacity | Excellent, multi-wave split airflow | Poor, direct vertical particle impact | Water Wall Tube Service Extension Effect | Extend overhaul cycle over 2 times | Slight wear reduction, limited protection effect | High Temperature Vibration Structural Stability | Strong, stamping integrated stress relief | Easy local deformation after long-term flue impact | On-site Installation Matching Scope | Adapt to irregular furnace wall transition zone | Only fit regular straight tube flat area | Long-term Comprehensive Operation Cost | Low, few replacement & shutdown loss | High, frequent maintenance replacement |
Selection Tip: Choose wave shaped anti-wear plate if your CFB boiler water wall frequently appears local thinning abrasion after short-term operation.
1. Clean the rust and ash deposits on the surface of water wall fins before installation to ensure full welding penetration.
2. Align the flat welding edges at both ends of the wave anti-wear plate closely with the fin surface, keep the wavy buffer surface facing the furnace inner flue gas flow direction.
3. Use matched high temperature welding rod for spot welding fixation, evenly distribute welding points to avoid local thermal deformation of the plate body.
4. Avoid violent hammer knocking on the stamped wave structure during hoisting and positioning to prevent hidden cracks inside the bending area.
5. Check the welding seam integrity and plate surface abrasion thickness every boiler overhaul period, replace severely thinned wave plates in advance to prevent furnace tube leakage risk.
1. Gradient wavy curved surface design changes the incident angle of circulating ash particles, converts vertical impact into sliding friction, greatly reduces tube wall metal loss rate.
2. Integrated hydraulic stamping eliminates weak welding joints, the whole plate bears uniform flue impact load, no local stress concentration fracture failure.
3. Reserved wide flat welding edges at both ends reserve sufficient welding operation space for boiler maintenance workers, shorten on-site construction working hours.
4. Variable wave height customizable design: high wave for super severe abrasion zone, low wave for mild transition zone, balance material cost and anti-abrasion performance flexibly.
Support full personalized customization according to customer CFB boiler construction drawings: adjustable plate thickness, wave height, total length, single side / double side welding edge structure, special narrow wide size matching irregular furnace wall layout.
Multiple material grade optional: Q235 / 1Cr13 / 309S / 310S heat resistant steel, support sand blasting only or high temperature anti-rust paint surface treatment.
Additional supporting service: Provide boiler anti-abrasion scheme technical consultation, on-site installation operation guidance, long-term bulk spare parts supply contract for power plant overhaul projects.
Wave shaped stamped steel anti-wear plates adopt layered separation packaging to avoid wave structure extrusion deformation during long-distance sea and land transit: each layer separated by foam protective strips, overall wrapped plastic anti-rust film.
Small batch finished products packed into solid export wooden cases; large bulk order goods bundled with steel strips on standard pallets, labeled with product specification marks for easy warehouse sorting.
Support FOB / CFR / CIF international trade terms, sea freight, land truck transportation available. Furnish complete steel material test certificates and dimensional inspection reports attached with each shipment for power plant project customs clearance & acceptance.
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