GB 50243-2016 第8.4.1条
| **** | The pipe materials, fittings, and valve models, specifications, and pressure ratings of refrigeration system piping (such as chilled water and cooling water pipes) shall comply with the design requirements; piping installation shall be horizontal and vertical, with correct slopes (e.g., the slope of chilled water supply and return pipes shall be ≥0.002, sloping toward air vent or drain points). |