When the instrumentation personnel provide control valves, flow meters, and other equipment for the process pipelines, what standards should I refer to?
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My question is as stated in the title. I work at an engineering company; I just graduated and know nothing yet. I hope everyone can help me out. Thank you all in advance.
Be familiar with the usage requirements of various instruments; there are specific requirements for the installation and use of control valves and flow meters. You can look for information on this topic in the forum.
The conditions provided by the instrumentation team for the process pipelines regarding control valves include parameters such as the standards and specifications of the valve flanges, diaphragm head size, valve height, flange spacing, height from the flange center to the ground, and weight, all of which facilitate piping work by the pipeline engineering team. The conditions that instrument technicians require for installing flow meters on process pipelines include the flange standards and specifications of the flow meters, flange spacing, height of the flow meters, length of the straight sections before and after the flow meters, and weight, among others. Refer specifically to the specifications related to gauge installation and the manufacturer’s samples.
Conditions are to be provided for the process piping discipline; the flow meter is primarily related to the connection dimensions of the pipes, as well as the straight sections before and after them； Some also require heating/purging conditions. Valves are primarily defined by their connection dimensions to pipes, as well as their external dimensions. The valve also requires gas supply conditions, so several taps need to be installed on the gas supply pipeline. Ask the veteran comrades and you’ll know.
I work in a design institute dealing with instrumentation. The projects I work on have requirements specified by the process engineering team; my role is to select the appropriate instruments, coordinate with the electrical engineering team regarding the interfaces between instruments and electrical systems, and then determine the connection dimensions for the process equipment. That’s it
In most cases, it is the manufacturing process that sets the requirements; our selection and design must meet those process conditions
The instrument design should provide the process design with the instrument connection dimensions and specifications, the required length of straight pipe sections for the instruments, and the methods for installing the instruments.
Yes, OP, it should be a process like this: generally, the process team puts forward requirements for the instruments, we select the appropriate models based on those requirements, and after confirming the technical specifications, we discuss with them the details regarding the interfaces (the connection dimensions and specifications of the instruments, the length of straight pipe sections required, the installation method of the instruments, as well as the electrical and pneumatic requirements, and whether heating is needed, etc.). All the design institutes I’ve worked with operate in this way.
Everyone should pay close attention to the question raised by the original poster. The poster works for an engineering company, not in a design firm; in many engineering companies, it is the process installation team that is responsible for installing the instruments. Of course, it is necessary to provide them with relevant information, and I think the necessary materials are installation diagrams and product manuals.