4.2　Operating Temperature of Metallic Materials

4.2.1　The operating temperature of metallic materials shall be determined in accordance with the relevant requirements in Appendix A，in combination with the effects of working medium on material properties.

4.2.2　The operating temperature of materials shall comply with the following requirements:

1　In the range of operating temperature，the applicability and safety of the materials shall not be affected.

2　In the range of operating temperature，materials shall be resistant to the fluid and ambient influences.