Main line valves in a manifold system are identified by?

Main line valves in a manifold system are identified by a letter designation and an assigned valve number to provide a clear and standardized method of identification. This dual system allows for better organization and communication among personnel who operate and maintain the valves. The letter designation can indicate the specific type or function of the valve, while the number uniquely identifies each valve within the system.

Using just assigned valve numbers or valve types alone does not provide sufficient information for operators to quickly ascertain the functionality or classification of the valve, which is vital in complex pipeline systems. Similarly, pipeline colors and sizes can indicate certain characteristics of the valves or pipes but do not serve as clear identifiers for each specific valve, which is why the combination of a letter designation and an assigned number is the preferred method in industry practice.