2007-11-12 11:26:04 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
#Pipe size is specified with two non-dimensional numbers: a Nominal Pipe Size (NPS) and a schedule (SCH).
#The relationship of these numbers to the actual pipe dimensions is a bit strange.
#The NPS is very loosely related to the inside diameter in inches, but only for NPS 1/8 to NPS 12. For NPS 14 and larger, the NPS is equal to the outside diameter (OD) in inches.
#For a given NPS, the OD stays constant and the wall thickness increases with larger SCH. For a given SCH, the OD increases with increasing NPS while the wall thickness increases or stays constant. Pipe sizes are documented by a number of standards, including API 5L, ANSI/ASME B36.10M in the US, BS 1600 and BS EN 10255 in the United Kingdom and Europe, and ISO 65 internationally. The ISO and European standard uses the same pipe ID's and wall thicknesses, but labels them with a Diametre Nominal (DN) instead of NPS. For NPS of 5 and larger, the DN is equal to the NPS multiplied by 25 (not 25.4).
#Please visit for getting details regarding pipe schedules::::::
http://en.wikipedia.org/wiki/Nominal_Pipe_Size
2007-11-13 00:29:55 · answer #1 · answered by alpha b 7 · 4⤊ 0⤋
Schedule 80, 120, or 160 is the pipe schedule that must be used for the nozzle neck. The pipe schedule defines the nozzle wall thickness. The nozzle neck then usually has a bolting flange welded to it.
2007-11-12 13:53:04 · answer #2 · answered by gatorbait 7 · 0⤊ 0⤋
These refer to the internal cross sectional measurement for a corresponding pipe size. The American National Standards Institute has defined and published the standards long ago. Tubing has a constant ID for a given size. Pipe, on the other hand, has a fixed OD and variable ID based on the pressure class of the pipe. Sch. 40, 80, 120, etc... all have a different ID for, say, 1" pipe. Since your question refers to nozzles you may be looking for flow rates. For a given pipe size Sch 40, 80 and 120 pipe will have variable flows at a fixed pressure because of the differing cross sectional areas. Most pump manufacturers publish this data.
2007-11-12 11:51:16 · answer #3 · answered by Tom J 1 · 0⤊ 0⤋
Sch 80 Means
2017-01-11 14:52:38 · answer #4 · answered by ? 4 · 0⤊ 0⤋
it's talkign about the pressure it can withstand in "Kelvins" the lesser the number, the stronger the nozzle.
2007-11-12 11:33:32 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Thickness of the steel pipe it is made of, higher the num, thicker the pipe
2007-11-12 11:48:17 · answer #6 · answered by booster 2 · 0⤊ 0⤋