1、High-temperature, high-pressure thermocoupleKey Technical Parameters
Electrical Export: M20x1.5, NPT 1/2
Connection Size: M20x1.5, NPT 1/2
Protection Rating: IP65
Explosion-proof Grade: d‖BT4, d‖CT5
Nominal Pressure: 15-40 MPa
2、High Temperature High Pressure ThermocoupleModel and Specifications
| Model | Grade Number | Temperature Range: °C | Heat response time | Protective tube material | Dimensions: L x W |
WRNG-430 WRN2G-430 | K | 0-800 | ＜ 180S | 1Cr18Ni9Ti | 380x150 430x200 480x250 530x300 580x350 630x400 680x450 |
WREG-430 WRE2G-430 | E | 0-600 | |||
WRNG-440 WRN2G-440 | K | 0-800 | |||
WREG-440 WRE2G-440 | E | 0-600 |
1) Type I thermocouple ordered according to agreement.
2) The remaining material for the protective tube will be ordered according to the agreement.
3) Model 430 is waterproof, and Model 440 is explosion-proof.
3、High-temperature, high-pressure thermocoupleMaterial and Selection of Protective Tube
| Material | Operating Temperature (°C) | Features and Applications |
| 1Cr18Ni9Ti | -200 — 800 | High-temperature corrosion resistance, typically used with general heat-resistant steel. |
| 304 | -200 — 800 | Low carbon content, excellent intergranular corrosion resistance, usually used as general heat-resistant steel. |
| 316 | -200 — 750 | Low carbon content, with good intercrystalline toughness, commonly used as heat-resistant steel. |
| 316L | -200 — 750 | Ultra-low carbon content, with excellent intergranular corrosion resistance, commonly used as heat-resistant steel. |
| 310S | -200 — 1000 | High-temperature oxidation resistance and corrosion resistance; commonly used as heat-resistant steel. |
| GH3030 | 0 — 1100 | Nickel-based superalloy steel, with excellent oxidation and corrosion resistance, commonly used as heat-resistant steel. |
4. Tube Form Selection
Flanges are available in various types such as PN15 (900) to PN40 (2500LB) RJ.
| Code | N | M | D | d | D1 | D2 |
| A | M20x1 ． 5（NPT1/2） | NPT1 ″ | Φ34 | Φ9 | Φ23 | Φ18 |
| B | NPT11/4 ″ | Φ45 | Φ9 | Φ28 | Φ23 |
5. Flange Model and Specifications
Flange Standard Code
| Standard Code | Document Number |
| China National Standard | GB9112-9131-88 |
| China Chemical Industry Standard | HG20592-20635-97 （ HGJ44-76-91 ） （ HG5001-5028-58 ） |
| China's Ministry of Machinery Standard | JB/T74-90-94 （ JB81-82-59 ） |
| US Standard | ASME/ANSI B16 ． 5-88 |
| German Standard | DIN 2628-2638-1975 |
| Japanese Standard | JIS2201-1796 |
6. Flange Specifications
CLASS150-600 RF
CLASS900-2500 RJ
7. Selection Guidelines
1) Model
2) Tolerance grade
3) Precision Grade
4) Protective Tube Material and Style
5) Flange Specifications and Types
6) Length or Insertion Depth
Example A:High-Temperature, High-Pressure Explosion-Proof ThermocoupleK-Type 1 Grade Protective Tube, A Grade Type, Insertion Depth 300mm. WRNG-440A L x 1 = 450 x 300 mm. d II BT4 316L ANSI 1" 1500 # RJ
