piping system diagram:
1. It mainly reflects the context of the whole system, whether the design of the whole system is correct, reasonable or advanced.
2. Represent what cannot be expressed or is difficult to express clearly in the plane.
3. Cooperate with the floor plan to reflect and specify the connection status of pipelines and equipment of the whole system, and guide the construction and installation.
For the relevant requirements and drawing methods of piping system diagram, please refer to Practical Design Data of Building Water Supply and Drainage-Common Data Set.
the node diagram is the installation details of nodes in the plan or system diagram, such as the installation details of pressure reducing valve and manhole of fire pool.