In revit mep, there is no material takeoff for ductwork. however, with some calculated values you can create a schedule that works as a material takeoff. to do so, from the view tab > expand schedules, and select schedule / quantities. in the new schedule dialog, under category select duct, and for under name enter duct schedule, and click ok.. Materials. ducts can be made out of the following materials: galvanized steel. galvanized mild steel is the standard and most common material used in fabricating ductwork because the zinc coating of this metal prevents rusting and avoids cost of painting. for insulation purposes, metal ducts are typically lined with faced fiberglass blankets (duct liner) or wrapped externally with fiberglass. Nominal pipe size. nominal pipe size (n p s) is a north american set of standard sizes for pipes used for high or low pressures and temperatures. the name nps is based on the earlier "iron pipe size" (ips) system. that ips system was established to designate the pipe size..
Schedule 80 pipe is thicker than schedule 40 pipe. look at the above formula of schedule number, allowable stress for material at given temperature is fixed. that means with an increase in service pressure schedule number will increase which is pipe wall thickness designator.. Since the outside diameter is fixed for a given pipe size, the inside diameter will vary depending on the wall thickness of the pipe. for example, 2" schedule 80 pipe has thicker walls and therefore a smaller inside diameter than 2" schedule 40 pipe. steel pipe has been produced for about 150 years.. Pipe materials revision 2.0 september 2014 3.0 materials used for pipe and tube 3.1 different materials used for pipe and tube pipe may be made from a variety of materials. in the past, materials have included wood and lead (latin for lead is plumbum, from which we get the word plumbing). nowadays the manufacturing of pipe uses many different.
