Capillary Tube Material: Understanding the Advantages and DisadvantagesCapillary tubes are small diameter tubes that are used in various industries to measure liquids and gases, and to isolate the measuring instrument from the process tapping point. The tubes are made in a variety of materials, each with its own advantages and disadvantages. In this blog, we will explore the different capillary tube materials, their properties, and their applications.Stainless Steel Capillary TubesStainless steel capillary tubes are the most commonly used capillary tubes in the industry due to their high corrosion resistance and durability. They are made from high-quality stainless steel and are ideal for use in applications that require high precision and accuracy, such as in chemical plants, laboratories, and pharmaceutical industries. Stainless steel capillary tubes are also resistant to high pressure and temperatures, making them a durable option for measuring in harsh environments.However, despite their many advantages, stainless steel capillary tubes can be difficult to bend and shape, making them unsuitable for certain applications. They are also relatively expensive compared to other materials.Copper Capillary TubesCopper capillary tubes are commonly used in refrigeration and air conditioning systems due to their excellent thermal conductivity and malleability. Copper is also a relatively cheap material, making it a cost-effective option for many applications. Copper capillary tubes are easy to bend and shape, making them ideal for use in confined spaces.However, copper is prone to corrosion and can react with certain chemicals, limiting their use in certain environments. They are also less durable than stainless steel, making them less suitable for applications that require high pressure or temperature.Plastic Capillary TubesPlastic capillary tubes are made from a variety of polymers such as polyethylene, polypropylene, and nylon, and are used in various applications such as food manufacturing, medical devices, and electrical equipment. Plastic capillary tubes are lightweight and easy to shape, making them ideal for use in applications that require flexibility and maneuverability.However, plastic capillary tubes are generally less durable than metal capillary tubes and can be prone to cracking and warping under high pressure or temperatures. They are also not suitable for use in certain chemical environments where the plastic may react with the material being measured.Glass Capillary TubesGlass capillary tubes are made from borosilicate glass and are commonly used in laboratories and medical applications due to their high precision and accuracy. Glass capillary tubes are resistant to most chemicals and are easy to clean and sterilize, making them an ideal option for use in sterile environments.However, glass capillary tubes are fragile and can break easily, making them unsuitable for use in applications that require high pressure or flexibility. They are also relatively expensive compared to plastic and metal capillary tubes.ConclusionIn conclusion, selecting the correct capillary tube material is important to ensure that the tube can withstand the demands of the specific application. Stainless steel is the most commonly used material due to its high corrosion resistance and durability, while copper is ideal for use in refrigeration and air conditioning systems due to its excellent thermal conductivity. Plastic capillary tubes are lightweight and flexible, while glass capillary tubes are highly precise and suitable for sterile environments. By understanding the properties of each material, one can select the best option for their application.
Read More
