A reasonable and proper selection of design standard and code isa basic presupposition of design work,as well as a basis for the nationalization of equipment and materials, optimization of process flow and reduction of engineering cost.

• 合理、适度地选择设计标准及设计参数是开展设计工作的基本前提，也是推行设备材料国产化、优化工艺流程和降低工程造价的基础。