Teflon Tube (Diameter 8) Factory

Teflon Tube (Diameter 8)

Teflon Tube (Diameter 8)

1.1 Sampling tube

1.1.1 Materials

Approved sampling tube materials and main performance indicators are shown in Table 2.

Table 2   Sampling tube materials and main performance indicators

Sampling tube material

Maximum working temperature

Performance

Density

g/cm3

Softening Point

Tensile strength

N/mm2

Elongation at break

PVDF—Polyvinylidene fluoride

129

1.76~1.78

171

30.8~42.5

250~300

FEP—Polyperfluoroethylene propylene

205

2.12~2.17

275

18.5~21.3

250~330

PFA—Soluble polytetrafluoroethylene

260

2.12~2.17

310

27.4~32.3

250~300

PTFE—PTFE

285

2.13~2.20

327

13.7~44.6

200~450

0Cr17Ni12Mo2—Stainless steel

320

7.97~7.99

1380

 

1.1.2 Pipe diameter and wall thickness

The outer diameter of the sampling tube is Φ6, Φ8, Φ10, Φ12, the deviation value should not exceed ±1% of the nominal size, and the minimum wall thickness of the tube should be ≥0.9 mm.

1.1.3 Maximum working pressure

The maximum working pressure of the sampling tube is shown in Table 3.

Table 3 Maximum working pressure of sampling tube                                               The unit is megapascal

 

Operating temperature

Sampling tube material

PVDF

FEP

PFA

PTFE

0Cr17Ni12Mo2

Maximum working pressure

Normal temperature 20℃

1.2

1.2

1.2

1.2

2.5

Medium temperature 120℃

0.8

High temperature 180℃

0.8

0.8

0.8

1.5

High temperature 250℃

1.5

 

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