The pressure class rating (such as 150 lb, 300 lb, etc.) of a line appears in the form of ________________ in the Line Number (or Line Designation) on a P&ID

The document / drawing that is primarily used in depicting the “Bill of Materials (BOM)” of piping system is the

A flange is used for instrument connection for a system with a design temperature of 316C (600F) and a design pressure of 1000 kPa (145 psi). What is the class rating of the flange to be used for this application? Explain your answer