PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Discussion on the Use of Transparent Teflon Corrugated Pipe
Classification:
Industry dynamics
Author:
Teflon tube little sister
Source:
Teflon tube little sister
Release time:
2010-01-12
Visits:
1. Transparent Teflon bellows Name: Fep bellows, F46 tube, transparent Teflon bellows, polytetrafluoroethylene bellows, Teflon bellows.
Corrugated tube refers to a tubular elastic sensitive element connected by a foldable wrinkle sheet along the direction of folding and stretching. The corrugated pipe wall is thin, the sensitivity is high, and the measuring range is tens of Pa to tens of MPa. Its open end is fixed, the sealing end is in a free state, and the auxiliary coil spring or reed is used to increase the elasticity. When working, it elongates along the length of the pipe under the action of internal pressure, so that the movable end produces a certain relationship with the pressure. The movable end drives the pointer to directly indicate the size of the pressure. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bouton tube, and the bellows is suitable for measuring low pressure.
2. Transparent Teflon bellows Color:
Commonly used color: transparent, black;
Not commonly used colors: yellow, brown, green, blue.
3. Characteristics of transparent Teflon bellows:
(1) Common features:
Use temperature:-200 degrees to 200 degrees;
Easy processing: can flanging, welding;
Aging resistance: can be exposed to ozone and sunlight for a long time without aging;
High transparency: low refractive index in all plastics, can be very intuitive to see the flow of the medium in the tube;
Corrosion resistance: Can withstand all strong acids, strong oxidants, strong reducing agents and various organic solvents except molten alkali metals, fluorinated media and those above 300 °.
(2) Not commonly used features:
密度：2.14-2.17g/cm³
Volume resistance> 1 × 1018
Surface resistance> 2 × 1013
Arc resistance> 165 seconds no leakage
Low water absorption: water absorption <0.1%
Lower friction coefficient: the friction coefficient is small;
Surface non-stickiness: known solid material heads cannot adhere to the surface;
Incombustible: the air will not burn, in line with the strict requirements of the fire place;
Non-toxic: non-toxic and tasteless, with physiological inertia, no harm to people and the environment.
Figure 1 Teflon corrugated pipe source: Teflon tube little sister
2. transparent Teflon bellows commonly used specifications: (unit: mm) other specifications can be customized
Metric: outer diameter 6mm 8mm 10mm 16mm 20mm 25mm 38mm 60mm, etc;
Imperial: 1/8 inch 1/4 inch 3/8 inch
1/2 inch 3/4 inch 1 inch
3. transparent teflon corrugated pipe production:
Teflon tube little sister home.
4. transparent teflon corrugated pipe uses:
(1) It can be used as tubular reactor and exchanger in special occasions;
(2) It can be used as feed and discharge pipes for tankers, storage tanks, containers and reaction kettles;
(3) can be used to replace the mechanical strength of graphite, ceramics, glass and other pipes;
(4) It can be connected by pipeline dislocation or used to balance pipeline displacement and dimensional changes caused by climate or other reasons, or used to eliminate high-frequency mechanical vibration;
(5) Bellows are widely used in instrumentation, and their main purpose is to be used as the measuring element of pressure measuring instruments to convert pressure into displacement or force;
(6) The bellows is often combined with a displacement sensor to form a pressure sensor that outputs electricity, and is sometimes used as an isolation element.
5. transparent Teflon corrugated pipe life:
The life of the transparent Teflon bellows is the shortest working period or cycle times that can ensure normal operation when used under working conditions. The elastic sealing system composed of bellows often works under the condition of changing load and large displacement with more cycles, so it is of great significance to determine the service life of transparent Teflon bellows. Because the role of transparent Teflon bellows is different, the requirements for its service life are not the same.
(1) When the transparent Teflon bellows is used to compensate for the positional deviation caused by the installation in the pipeline system, only a few times is enough for its life requirements.
(2) The transparent Teflon bellows is used in the constant temperature controller with high switching frequency, and its service life must reach 10000 times to meet the use requirements.
(3) When the transparent Teflon bellows is used as a vacuum seal for a vacuum switch, its life must reach 30000 times to ensure normal operation.
From the above three examples, it can be seen that due to the different conditions of use, the service life of the bellows is very different. The life of transparent Teflon bellows is related to the fatigue characteristics of the selected materials, and also depends on the residual stress of the forming bellows, the stress concentration and the surface quality of the bellows. In addition, the service life is related to the working conditions of the bellows. For example: transparent Teflon bellows work displacement, pressure, temperature, working medium, vibration conditions, frequency range, impact conditions.
Bellows in the working process, the length of its life depends mainly on the maximum stress generated in the working process. In order to reduce the stress, it is generally achieved by reducing the working displacement of the bellows and reducing the working pressure. It is stipulated in the general design that the working displacement of the transparent Teflon bellows should be less than half of its allowable displacement, and its working pressure should be less than half of the pressure resistance of the bellows.
Teflon tube little sister's home: Shenzhen dankai technology co.,ltd (ShenZhen DanKai Technology co.,ltd.), whose predecessor was the fluorine plastic material factory of dongguan dadi insulation material co.,ltd. established in 1998, is an intelligent manufacturing enterprise specializing in the research and development, production, sales and service of FEP, PFA, PTFE and other fluorine plastic tube rod sheet membrane products and other insulation materials. The company has international standards of senior R & D team and the introduction of foreign fluorine plastic products production line. Some fluoroplastic products through ISO9001, SGS, FDA certification, Huawei, Foxconn, the United States, ZTE, Intel, AirTAC and other domestic and foreign cooperation customers fully affirmed. The company's main products are: ① pipes: Ptfe PTFE pipes, Fep pipes, Pfa pipes, Pvdf pipes; ② Heat shrinkable tubes: Ptfe heat shrinkable tubes, Fep heat shrinkable tubes, Pfa heat shrinkable tubes, Pvdf heat shrinkable tubes; ③ Plate and rod films: Ptfe plate and rod films, Feep plate and rod films, PE ⑤, Pvdf plate and rod films, etc, spiral tube, spring tube, rotary cutting tube, welding rod, tee, straight, gasket, joint, cone rod, flared tube, sealing tube, braided tube, corrugated tube, etc. At the same time can be customized according to customer requirements processing production of various specifications of fluorine plastic products.
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