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L Series Fixed Screwing Protective Tube
L Series Fixed Screwing Protective Tube
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产品概述

L serial fixed flange’s protective tube is setting outside the temperature measurement component when thermocouple and resistor is working, and it has the anti-corrosion effect and defends against agent’s pressure, which makes the output of measurement component precisely reflect the temperature.

 

It has following features:

1. According to IEC international standard design

2. High concentricity and deep hole processing. Anti-high pressure, temperature and liquid speed.

3. Can be manufactured and installed with the equipment at the same time;

4. Different pressure demands to meet different environments and industries.

5. According to customers’ need, we can provide extra long protective tube more than 1.5 meter long.


技术参数

1) combination form

Connection terminal form

Sketch Map

Measuring end form

Code

name

Code

name

L1

Hex Connector Type


1.png

P

Flat tube

L2

Hexagon joint backward type


Z

Taper pipe

L3

Hex joint with sealing disc type


T

Step tube





2）Size

External screw thread

Internal screw thread

Other Size

Insertion depth

mm

D3

D4

S

H

A

B

D

d

M20×1.5

M16×1.5

φ22

φ32

28

20

25

50

75

100

125

20

 

φ12

φ7

 

100、150

200、250

300、350

400、450

500、550

600、650

700、750

800、900

1100、1150

 

M27×2

M16×1.5

 

M20×1.5

 

NPT1/2   

 

φ28

φ40

 

32

 

20

30

φ16/φ13

M33×2

φ34

φ48

36

25

30

φ22/φ15

G3/4

φ28

φ40

 

32

 

20

30

φ16/φ13

G1

φ34

φ48

36

25

30

φ22/φ15

R3/4（ZG3/4）

φ28

32

 

25

25

φ16/φ13

R1（ZG1）

φ34

36

25

φ22/φ15

NPT1/2

φ22

28

30

20

φ12

NPT3/4

φ28

32

25

25

φ16/φ13

NPT1

φ34

36

25

φ22/φ15

Note:1, the internal thread is generally used M20 × 1.5, and foreign products supporting the use of NPT1 / 2.

2, the two table "D" in the table, the molecular is straight-type protection tube external diameter



 





 

3) working pressure

External screw thread

Protection tube type

Nominal pressure

Note appended

M20×1.5

NPT1/2

the overall drilling type

6.4

1, the characteristics of overall  drilling protection tube type:

1) seal reliability is high

2) due to thermal stress casued by no welding and grain growth phenomenon , so the corrosion resistance performance is good

2, With the selected of types and the use of different temperature, the nominal pressure should be a reasonable derating,  as the use of the working pressure.



Straight pipe welding type

M27×2

G3/4

R3/4（ZG3/4）

NPT3/4

the overall drilling type

10

Straight pipe welding type

M33×2

G1

R1（ZG1）

NPT1

the overall drilling type

30

Straight pipe welding type

10





4) protective tube materials and the use of temperature

Code

Protection tube material

Long term use temperature

℃

Maximum use temperature

℃

B

06Cr18Ni11Ti

800～950

1050

M

Cr18Ni12Mo2Ti Or 316

800～950

1050

L

316L

800～950

1150

C

1Cr25Ni20

800～1000

1150

G

GH30Alloy

800～1050

1200

Y

3YC-52Alloy

800～1200

1300

H

HASTELLOY

800～1200

1300

Note: the long-term use of the temperature and the maximum use of temperature due to the different atmosphere.