BDL Type Protection Tube
Threaded protection tube for power plants, flue gas duct type and medium/low-pressure structure, threaded/ferrule mounting, suitable for power plant flue gas ducts and medium/low-pressure measurement points.
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- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The BDL type is a threaded protection tube for power plants, used for temperature measurement points in power plant flue gas ducts and medium/low-pressure pipelines, mounted by thread or ferrule. Four structures are available: flue gas duct integral type (02A), flue gas duct steel tube type (02B), flue gas duct steel tube reducing type (02C), and medium/low-pressure 05 type, with optional spray-welding surface treatment to resist erosion by dust-laden airflow. Mounting threads cover M27×2, M33×2, M60×3 and the NPT, R, G series.
| Parameter Name | Technical Specifications |
|---|---|
| Structure type | |
| Design | 02A Flue gas duct integral / 02B Flue gas duct steel pipe type / 02C Flue gas duct steel pipe reducing type / 05 Medium and low pressure |
| Installation Method | Threaded / Ferrule |
| Pipe plug | Y with 304 sealing plug / N without plug |
| Size range | |
| 02A / 02B outside diameter | Φ25 (P25), Φ28 (P28) |
| 02C outside diameter | Φ28×3 to Φ16 |
| 05 outside diameter | 28/18 (D11), 23/18 (D13) |
| Mounting thread | M27×2 / M33×2 / M60×3 / NPT3/4"~2" / R3/4"~2" / G3/4"~2" |
| Insertion length | Multiples of 10 mm |
| Protection sleeve inner diameter | Φ7 / Φ8 / Φ10 (not specified for steel tube type) |
| Surface treatment and material | |
| Surface treatment | SW spray welding, treatment length in multiples of 50 mm |
| Stainless steel | 304(A) / 316(H) / 316L(HL) / 321(AT) / 310S(P) |
| High-temperature alloy | GH3030(B) / GH3039(C) |
| Maximum operating temperature | 304/316 ≤800℃; 310S ≤1100℃; GH3039 ≤1150℃ |
- Dedicated for power plant flue gas ducts, resistant to dust-laden airflow erosion
- Three flue gas duct structures: integral, steel pipe type, steel pipe reducing type
- Optional spray welding surface treatment, extending service life under wear conditions
- Thread specifications cover M27~M60 and NPT / R / G series
- Steel pipe type does not specify inner diameter, suitable for large-diameter, low-pressure measurement points
- Reducing type (02C) achieves sufficient insertion depth on small-diameter pipes
Power plant flue gas duct temperature monitoring
In boiler flue ducts and air ducts, the 02A integral structure with spray welding treatment is used to measure flue gas temperature and resist dust erosion.
Metallurgical heating furnace pipe temperature measurement
The furnace gas pipeline adopts the 05 medium/low pressure structure, fitted with 310S material for high-temperature oxidation resistance.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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