BDH Type Protection Tube
Welded thermowell dedicated to power plants, with four constructions: thermowell sleeve type / high-pressure type / medium- and low-pressure / socket weld, installed by butt welding, suitable for high-temperature and high-pressure piping in power plants.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The BDH type is a welded thermowell designed specifically for power stations, used for temperature measurement in high-temperature and high-pressure main steam, reheat steam and feedwater pipelines in power plants, and connected to the pipeline by butt welding. It is available in six configurations: thermocouple-pocket type 01A/01B, high-pressure type 03A/03B, medium- and low-pressure type 04A, and SOCKET WELDED 04B. Outer diameter and insertion length are selected according to the attached table, and a 304 sealing plug can be supplied for pressure testing and maintenance. Materials cover stainless steel and common power-station heat-resistant steels such as 20#, 20G, 12Cr1MoV, 15CrMo, A182F91 and A182F92.
| Parameter Name | Technical Specifications |
|---|---|
| Structure type | |
| Design | 01A/01B thermocouple-pocket type, 03A/03B high-pressure type, 04A medium- and low-pressure, 04B SOCKET WELDED |
| Installation Method | Butt welding |
| Pipe plug | Y with 304 sealing plug / N without plug |
| Outer diameter and insertion length | |
| 01A | D01 62/40/22, D02 60/38/22 (insertion 120 mm) |
| 01B | D03 75/40/25 (insertion l1/l2/l3) |
| 03A | D04 32/38/22 |
| 03B | D11 28/18, D12 38/25 |
| 04A | D05 42/32/18 |
| 04B | D05 33.4/25.4/19 |
| Insertion length | l1/l2/l3, multiples of 10 mm |
| Protection sleeve inner diameter | Φ7 / Φ8 / Φ10 (specify when sleeve is supplied separately) |
| Material | |
| Stainless steel | 304(A) / 316(H) / 316L(HL) |
| Heat-resistant steel | 20#(ZA) / 20G(ZF) / 12Cr1MoV(ZB) / 15CrMo(ZD) / 15NiCuMoNb5-6-4(ZC) / A182F91(ZE) / A182F92(ZG) |
- Power-station-specific structure, suitable for high-temperature and high-pressure pipelines such as main steam and reheat steam
- Four installation structures: thermowell, high-pressure, medium/low-pressure, and socket weld
- Butt-welded connection, service life equal to the pipeline, no risk of leakage
- Optional 20G, 12Cr1MoV, A182F91/F92 and other heat-resistant steels commonly used in power plants
- Can be supplied with a 304 sealing pipe plug for pipeline pressure testing and component maintenance
- Outside diameter and insertion length selected as a complete set per the specification table, reducing on-site piping
Main steam pipeline of coal-fired units
The 01A thermowell structure with A182F91 material is used on the main steam pipeline of 600MW-class units for long-term high-temperature operation.
Temperature measurement in metallurgical waste heat boilers
The 03B high-pressure structure with 12Cr1MoV material is used in the high-temperature section of the waste heat boiler to monitor superheated steam temperature.
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.
- Phone consultation +86-21-66020232
- Email inquiry web@qishan-sh.com
