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The pipe schedule is the way pipe wall thickness is mentioned. Form 6” to 42”, it increases by 2” step and after that in 4”.

There is no change in other dimensions when you use DN.įrom this table, you can see that initially pipe size increase by ¼ than ½ and then by 1”. Check the below table for easy understanding. You can get any NPS to DN by multiplying it with 25. Here, you have to note that DN shows pipe sizes differently than NPS.Ģ” pipe is simply mentioned as DN 50. What is DN (Diameter Nominal) Pipe Sizes?ĭN or Diameter Nominal is an International designation (SI or Matric Designator) and also a European equivalent of NPS to show pipe sizes. So when someone says 25nb pipe or 50nb pipe basically they are talking about DN. I have also seen that when pipe dimensions are shown in mm (DN) people refer pipe sizes in NB. NB is also an American way to refer pipe dimensions. As such, there is no difference between NB and NPS. NPS is frequently referred as an NB (Nominal Bore). Pipe wall thickness are rounded to nearest 0.01 mm.Outside diameter 16 inches and below rounded to nearest 0.1 mm.Outside diameter above 16 inches rounded to nearest 1 mm.You can easily convert inch dimension to mm by multiplying it with 25.4 and rounding as follow Gaskets & Spectacle Blinds Expand / Collapse.Pipe Fittings Inspection – Visual & Testings.See our list of upcoming workshops below to learn more. We now offer specialty workshops on specific modeling topics, including urban flooding analysis, wastewater, watershed, water distribution, groundwater, low impact development (LID) analysis, integrated 1D-2D modeling, and development impact analysis. Accredited professional development course.Software, example files, digital workbooks and guides provided (time-limited).Detailed hands-on exercises with ample one-on-one guidance.Lecture-style sessions led by expert instructors (professional engineers).Attend an in-person workshop, a virtual live workshop or arrange a private (in-house or virtual) workshop.You will explore how to plan, design, analyze, and manage drainage stormwater/wastewater/watershed systems of all types, from simple to unlimited complexity. Our live workshops teach you everything you need to take full advantage of the latest PCSWMM and EPA SWMM5 modeling packages.