Construction drawings are a big concept and refer to all design drawings used in the construction stage.

Petrochemical instrument drawings have slightly different traditional habits among design institutes, but generally they should contain at least the following contents:

Measurement and control schematic diagram including flow chart; control cabinet diagram (also available Classified as the former); measurement and control floor plan (including instrument equipment material list, etc.); installation drawing (because there are standard installation drawings for reference, if it is not special or very necessary, it can be omitted or noted).