JB/T 5219-1991 Industrial Thermocouple Types, Basic Parameters and JB/T5219-1991 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5219-91
Industrial Thermocouple Types, Basic Parameters and Dimensions 1991-07-09 Issued
Ministry of Machinery and Electronics Industry
1992-07-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Industrial Thermocouple Types, Basic Parameters and Dimensions Subject Content and Scope of Application
JB/T5219-91
This standard specifies the types, basic parameters and dimensions of detachable and armored industrial thermocouples (hereinafter referred to as thermocouples). This standard applies to thermocouples with one or two pairs of thermocouples, protective tubes and wiring devices or other additional devices. 2 Thermocouple Type
The shape of the protective tube and the type of the fixing device of the thermocouple are shown in Table 1. Table 1
Protective tubewww.bzxz.net
Fixed installation
Type of installation
Approved by the Ministry of Machinery and Electronics Industry on July 9, 1991
Implemented on July 1, 1992
Protective tube
Fixed installation
Type of installation
Sleeve or sleeve
JB/T5219—91
Continued Table 1
Protective tube
Fixed installation
Type of installation
Sleeve or sleeve
JB/T5219—91
Continued Table 1
Protective tube
Fixed installation
Type of installation
JB/T 5219---91
Continued Table 1
Protective tube
Fixed installation
Type
JB/T5219-91
Continued Table 1
Note: In the figure of No. 5 in the table, the size of M is M20×1.5. The user is also allowed to negotiate with the manufacturer to manufacture other sizes. 2.2 Types of thermocouple wiring devices
Thermocouple wiring devices have the following types: no junction box,
simple type;
protective type (anti-drainage, anti-splash, anti-spray, etc.); flameproof type;
plug-in type.
Basic parameters and dimensions
3.1 Basic parameters of thermocouples
The types, graduation numbers and temperature ranges of thermocouples are shown in Table 2. Table 2
Thermocouple type
Platinum 10%-Platinum
Platinum 30%-Platinum 6%
Nickel-chromium-nickel-silicon
Nickel-chromium-silicon-nickel-silicon
Nickel-chromium-copper-nickel
Copper-copper-nickel
Iron-copper-nickel
Graduation number
Dimension 1:10
AA section enlargement
Temperature range ℃
0~16 00
600~1700
200~+1200
-200~+1200
-200～900
200~+350
-40~+750
Note: The actual operating temperature range of the thermocouple is related to the material of the protection tube, the measured medium, the diameter of the couple wire, etc., and should be specified by the manufacturer in the instruction manual.
3.2 Protection tube diameter and insertion depth.
Protection tube diameter d and insertion depth L are shown in Table 3. 5
8.3 Exposed length
Exposed length (L.) is shown in Table 4.
Shape of protection tube
Straight, tapered
(fixture)
Tapered (welding)
Diameter of protection tube
JB/T5219—91
Type of wiring device
Socket wiring box
Other wiring boxes
Socket wiring box
Other wiring boxes
Note: The L in the figure of No. 5 in Table 1 also allows the user to negotiate with the manufacturer to manufacture other sizes. 3.4 Length of right-angle protection tube
The length LA and LB of the right-angle protection tube of the thermocouple can be 500 or 750mm. 3.5 Dimensions of fixture
The dimensions of different types of fixtures are shown in Tables 5, 6 and 7. Table 5
Fixed installation
Type of installation
Hand S
Wrench S
Protective tube
Diameter d
M27×2
M33×2
M33×2
Exposed length L.
30.50,100
100，150，200，250
20，30，50
50，100，150，200
Note: ①For the thermocouple of the socket junction box, when the diameter of the protective tube is 12mm, the connection thread of M22×1.5 can be selected. ②For special purposes, the production of fixtures of other sizes is allowed after consultation between the user and the manufacturer. 6
Nominal pressure
Fixed installation
Setting type
Fixed installation
Setting type
Schematic diagram
Movable ferrule thread
Fixed ferrule thread
JB/T5219---91
Protective tube diameter
Protective tube diameter
$55014
Nominal pressure
Nominal pressure
2.5Normal pressure
Fixed installation
Setting type
Fixed ferrule flange
Movable ferrule flange
3.6Dimensions of terminal box outlet hole
Dimensions of terminal box outlet hole are shown in the figure below.
Additional Notes:
JB/T5219-—91
Continued Table 7
Protective tube diameter
Four types of A-Φ8, Φ10mm, Φ12mm and 15mm. This standard is proposed and managed by the National Technical Committee for Industrial Process Measurement and Control Standardization. This standard is managed by the Shanghai Institute of Industrial Automation Instruments of the Ministry of Machinery and Electronics Industry. This standard was drafted by Shanghai Automation Instrument Factory No. 3. The main drafters of this standard are Han Xiaobai, Huang Baokui, He Guoliang and He Shihao. 2
Nominal pressure
222.5 Atmospheric pressure
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