40 00 00 Process Interconnections
40 01 00 Operation and Maintenance of Process Interconnections
40 01 10Operation and Maintenance of Gas and Vapor Process Piping40 01 20Operation and Maintenance of Liquids Process Piping40 01 30Operation and Maintenance of Solid and Mixed Materials Piping and Chutes40 01 40Operation and Maintenance of Process Piping and Equipment Protection40 01 60Operation and Maintenance of Process Control and Process Facility Enterprise Management Systems40 01 70Operation and Maintenance of Instrumentation for Process Systems40 01 90Operation and Maintenance of Primary Control Devices