control valve
Regulating valves are reflected in HVAC drawings and bill of materials. The position and quantity of regulating valves will be marked on the drawings, and the model and quantity of regulating valves will be indicated on the bill of materials.
flange
Flange belongs to pipeline accessories. If it is a small project, it is counted together with the valve and on the bill of materials. If it is a big project, it will be converted into installation auxiliary materials (like screws).
support
Brackets belong to pipeline accessories, and there are "brackets" or "bracket angle steel" in the bill of materials, and so on. Calculated by 1000kg. In the budget, there is a support system (including production, anti-corrosion, etc. ).
Embodiments in HVAC diagrams
HVAC drawings mainly reflect the plane, system layout, equipment and user points, pipe size, control (such as valves, etc. ), safety standards and requirements (such as erection and insulation, etc. ).
Embodied in the bill of materials
The bill of materials mainly reflects the steel (tons) required for main equipment, all pipelines, valves, other accessories of pipelines, thermal insulation materials and supports.