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中文简体Stainless steel instrument tubing is used to connect various pressure gauges, valves, and flow monitors to central piping systems in industrial settings. These tubes are often required to work with highly corrosive fluids and gases. Because of this, the tube material must be able to withstand corrosion.
Several different types of stainless steel are used to manufacture tubing. Each type has its own set of characteristics, but they all have one thing in common: their ability to withstand a variety of temperatures and environmental conditions. The key factor when choosing the right tubing is to determine its intended usage and process condition. Tubing materials can be categorized by their critical pitting and crevice temperature (CPT, CCT), tensile strength, mechanical properties, weldability, and cost.
In general, the more expensive grades of tubing are better suited for higher temperatures and harsher environments. However, the specific alloy chosen for a particular application should also be taken into consideration. 304 stainless steel, for example, is an excellent choice for most applications because it is inexpensive, readily weldable, and has good corrosion resistance. 316 stainless steel is also an option, as it has improved resistance to pitting and corrosion in chloride solutions.
Another important characteristic of tubing is its hardness, which is measured by the Brinell hardness test. The harder the tubing, the greater its strength and wear resistance. The hardness of tubing is an important factor when selecting a material for a particular application, because it can affect the integrity of the finished product.
Tubing can be manufactured from either seamless or welded construction methods. Both have their advantages and disadvantages, but the forming method will influence the final product in different ways. Welded tubing has a tendency to have more internal stresses than seamless tubing, and it may require extra support to prevent vibration or sags that can damage the system. Seamless tubing, on the other hand, is less likely to have this problem because it has a smoother interior surface.
When purchasing tubing, it is also a good idea to look for tubes with an appropriate working pressure rating. Tubing is usually rated for working pressures between 300 and 800 pounds per square inch (psi). Higher-pressure ratings are available, but they should be considered carefully because of the possibility of intergranular corrosion in high-temperature service.
Stainless steel tubing can be purchased from a wide range of companies. Most manufacturers offer a full line of sizes and specifications, and they can also customize products to meet the needs of specific projects. For example, some companies can provide custom lengths of tubing, and they can also offer value-added services like laser welding or deburring. In addition, most companies offer a wide range of surface finishes. This includes polished, buffed, brushed, and mill finish.
