What materials are generally used in instrument design? What materials are used? Are there any guidelines?
Thread Content
What materials are generally used in instrument design? What materials are used? Are there corresponding standards? Or those who have worked on large projects – please share their own standard documents so I can take a look and learn from them~~~
Are there any specifications for the material? If the material is of poor quality, the instrument will break down in less than two days. Different media require the use of different materials! But I’ve never seen any regulations stating that you must use a certain material! It just needs to be of a higher grade than the pipe material!
This range is too large, isn’t it? Depending on the occasion and environment, the materials used vary, and for many special occasions, different organizations use different materials as well. No unified standards have been found; at most, each organization settles on its own internal standards.
The installation specifications include a list of materials for instrument installation!
In short, we’ll use whatever process is available! !
The material used for instruments is usually 316/304 stainless steel, but there are special cases such as Monel, Hastelloy, and duplex stainless steel. DBB valves are now widely used in instruments
In my opinion, in chemical engineering design, one must first understand the properties of the process medium being measured. Then, based on samples, it is determined which materials are suitable for use; typically, the samples will indicate which materials are resistant to acids and alkalis, as well as which materials are appropriate for measuring certain types of media. Also, for thermal measurements, some high-temperature and high-pressure measurement tasks require special attention to the selection of materials, the thickness of the pressure transfer tube walls, and the connection methods.
This depends on the requirements of the process medium, as well as cost considerations. The manufacturer you choose will produce what you need
Reply to 6# Xiaoyeye: I’d like to ask gently, in what applications are instrument tubes made of materials such as Monel and Hastelloy used?