Industrial high temperature and high pressure thermocouple

1. Application of high temperature and high pressure thermocouple

   It is suitable for temperature measurement and control in high temperature and high pressure places in the production process of petroleum and chemical industry. It is a commonly used temperature device in oil refineries and high-pressure polyethylene.

2. The main technical parameters of high temperature and high pressure thermocouple

   Electrical outlet: M20x1.5, NPT1/2
   Connection size: M20x1.5, NPT1/2
   Protection level: IP65
   Explosion-proof grade: d‖BT4, d‖CT5
   Nominal pressure: 15-40MPa

3. Models and specifications of high temperature and high pressure thermocouples

Model number	Index number	Temperature measurement range ℃	Thermal response time	Material of protection tube	Specification Lxl
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

Thermocouple Class I is ordered according to agreement;
The remaining materials of the protection tube are ordered according to the agreement;
Model 430 is waterproof, and model 440 is explosion-proof.

4. Protection tube material and selection

Material	Use temperature °C	Features and uses
1Cr18Ni9Ti	-200—800	Has high temperature corrosion resistance, usually used for general heat-resistant steel
304	-200—800	Low carbon content, good intergranular corrosion resistance, usually used as general heat-resistant steel
316	-200—750	Low carbon content, good intergranular resistance, usually used as heat-resistant steel
316L	-200—750	Ultra-low carbon content, good intergranular corrosion resistance, usually used as heat-resistant steel
310S	-200—1000	Has high temperature oxidation resistance, corrosion resistance, usually used as heat-resistant steel
GH3030	0—1100	Nickel-based superalloy steel has excellent oxidation resistance and corrosion resistance, and is usually used as heat-resistant steel

5. Casing type selection

The flange can choose 900 (PN15)-2500LB (PN40) RJ and other different forms.

6. Flange model and specification of high temperature and high pressure thermocouple

Flange standard code

Standard code	File Number
China National Standard	GB9112-9131-88
China Ministry of Chemical Industry Standards	HG20592-20635-97 （HGJ44-76-91） （HG5001-5028-58）
China Ministry of Machinery Standards	JB/T74-90-94 （JB81-82-59）
American standard	ASME/ANSI  B16．5-88
German standard	DIN 2628-2638-1975
Japanese standard	JIS2201-1796

7. Flange specifications

   CLASS150-600 RF
   CLASS900-2500 RJ

8. Type selection instructions

     model
     Index number
     Accuracy class
     Protection tube material and form
     Flange specification and form
     Length or insertion depth
    Example A: High temperature and high pressure flameproof thermocouple type K, level 1, protection tube type A, insertion depth 300mm. WRNG-440A L×1=450×300 mm. dⅡBT4 316L ANSI 1″1500#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