7　Piping of Combustion，Compressed Air and Cooling Water Systems

7.1　General Requirements

7.1.1　Pipes and pipe accessories stated in this code shall be the pipe network in the reheating furnace area behind the take over point，including pipes which effect supply to the combustion system of the reheating furnace such as combustion air pipe，fuel gas pipe，and fuel oil pipe，pipes used for purging and bleeding of fuel gas piping，and including compressed air pipe，water supply pipe for cooling components and the like，plus the accessories of all the pipes mentioned above.

7.1.2　Installation of the gas piping and its accessories shall comply with the requirements in current national standard GB 6222 Safety Code for Gas of Industrial Enterprises.

7.1.3　Quality acceptance of the compressed air pipe and pneumatic system equipment shall comply with the requirements in current national standards GB 50231 General Code for Construction and Acceptance of Mechanical Equipment Installation Engineering，GB 50235 Code for Construction and Acceptance of Industrial Metallic Piping and GB 50093 Code for Construction and Acceptance of Automation Instrumentation Engineering.