Which specialty should choose the type of valves for the design institute?

Control valves belong to the instrumentation category, process valves belong to the process category, and ordinary valves seem to belong to the piping category?

The pipeline is not responsible for selecting materials； Valve selection is generally determined by both material and manufacturing process. If there are special requirements for the process, they will be specified separately in the P&ID; otherwise, it can be determined using the material grade table provided by the materials department ； The control valve is selected by the instrument.

In a design institute, is it the \"process system\" that determines what type of valve should be used on a device, or is it the \"pipeline materials\" team that decides? Since the details are so specific, your department must have corresponding rules and regulations to determine this; different designers assume different responsibilities, and those responsibilities may vary across different departments. As for whether another discipline has the authority to make changes once the valve design has been finalized… There is no right to make modifications; only the right to submit suggestions, with the decision left to designers at a higher level

1. In a design institute, is it the \"process system\" that determines what type of valve should be used for a particular device, or is it the \"pipeline materials\" specialty that decides? The type and material of the valves are determined by the process engineering team, in consultation with the pipeline and materials engineering teams. If the process engineering department takes the lead in such a situation, it is entirely possible to determine that valve. 2. If the valve type has been determined, does another discipline have the authority to make changes? No right. Only the process engineering department has the authority to make changes. Changes are required for the piping discipline, and requests must be made to discuss them with the process discipline; if the process discipline does not agree, then no changes can be made.

The PID is determined by the process system; it should be them who decide it.

Control valves are proposed by the instrumentation team, while all other valves fall under the responsibility of the process team.

Different engineering companies have different specialized areas of focus: control valves fall under the instrumentation category; safety valves are considered part of instrumentation abroad, while in China some are classified under process engineering and some under piping systems. Manual valves belong to the piping system category, whereas electric valves are assigned to either instrumentation or process engineering – the specific classification depends on which design firm or engineering company is handling the design

1. In a design institute, is it the \"process system\" that determines what type of valve should be used for a particular device, or is it the \"pipeline materials\" specialty that decides? Answer: The type of valve is determined by the process engineering team, as different types of valves have varying characteristics. The process engineers must select the appropriate valve type based on the operating conditions and properties of the materials involved. They need to indicate this choice using symbols on the P&ID diagram and provide explanations in the overview page. The material of the valve is determined by the materials department, which also prepares a pipeline grade table. In some cases, the unit grade tables are prepared by the process or piping specialists, but they must be checked and signed off by the materials specialists. 2. If the valve type has been determined, does another discipline have the authority to make changes? Answer: If there are any disagreements or special circumstances that require modifications on the design drawings, it is necessary to consult with the process designers and relevant specialists. If the requirements can be met, the modifications can be made; the process team will then incorporate these changes into the next version of the design documents, or provide a written approval. In design work, higher-level personnel or units also do not have the right to modify design documents; any changes to the design must include a reason for such changes, and they can only be approved by the designers. There are issues of responsibility at stake; no one dares to arbitrarily take the blame. This post was last edited by Boring Pavilion Grand Scholar on 2009-2-20 at 14:47.]

1# hutom123: Globally, some systems use mechanical mechanisms, while others rely on electronic controls and instruments