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Classification of FEP tubes and methods for avoiding extrusion deviation of FEP tubes
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2024-04-27
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Brief Introduction of 1. FEP Tube
FEP pipe, the full name of fluorinated ethylene propylene copolymer pipe, is a kind of pipe made of high-performance fluoroplastic FEP(Fluorinated Ethylene Propylene). FEP materials are favored in many industries for their unique chemical stability, high temperature resistance, excellent electrical insulation and non-adhesion. FEP tubes maintain good performance over a wide temperature range of -200°C to 200°C, are highly resistant to most chemicals, are not easily corroded, and have a low coefficient of friction and transparency, enabling efficient, safe and visual fluid transport.
Classification of 2. FEP tubes
According to different use requirements and processing technology, FEP tubes can be divided into the following categories:
Seamless tube: through the extrusion or stretching process of a molding, no weld, with excellent integrity and sealing, suitable for cleanliness, pressure requirements of the occasion, such as semiconductor manufacturing, chemical laboratory equipment.
Welded pipe: FEP pipe sections are connected by butt welding or casing welding, which is suitable for long-distance and large-diameter fluid transportation systems, such as chemical plants, petroleum refining facilities, etc.
Bellows: flexible, flexible, commonly used to compensate for pipe thermal expansion and contraction, absorption of equipment vibration or displacement, widely used in machinery and equipment, ships, aerospace and other fields.
Transparent tube: A special process is used to maintain the high transparency of FEP material, which is easy to observe the internal fluid state. It is suitable for laboratories, medical equipment, food processing and other places that need real-time monitoring of fluid conditions.
Reinforced pipe: embedded metal mesh or braided layer to enhance the pressure bearing capacity and mechanical strength of the pipe, suitable for high pressure and high impact environments, such as hydraulic systems, high pressure pneumatic equipment, etc.
How can 3. avoid FEP tube extrusion deviation?
The extrusion process of FEP tube is the key link to determine its quality. To avoid extrusion deviation, the following principles and measures should be followed:
Raw material control: Select high-quality and pure FEP raw materials to ensure stable performance and no impurities, moisture and other factors that affect the quality of extrusion.
Equipment debugging: regularly calibrate and maintain the extruder to ensure that all parts of the extruder (such as screw, barrel, mold, etc.) are in good working condition and the temperature, pressure, speed and other parameters are accurately controlled.
Mold design: According to the required pipe specifications, the mold size, shape and cooling system are carefully designed to ensure that the molten FEP material passes through the mold evenly and smoothly, and there is no stress concentration or deformation during the cooling and shaping process.
Optimization of process parameters: reasonably set the extrusion speed, melt temperature, cooling rate and other process parameters, so that it matches the characteristics of raw materials and mold design, to prevent the improper setting of parameters caused by uneven pipe wall thickness, eccentricity, size fluctuations and other issues.
Online quality monitoring: the use of infrared thermometer, laser caliper and other equipment real-time monitoring of the extrusion process, timely detection and adjustment of abnormal conditions to ensure stable product quality.
Finished product inspection: strictly implement the finished product inspection system, carry out appearance inspection, size measurement, performance test, etc. on the FEP tube extruded, eliminate unqualified products, and ensure that each FEP tube delivered to the user meets the standard requirements.
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