npt - National Pipe Taper (pipe thread specification)

размер в дюймах



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Note added at 14 mins (2004-06-29 08:10:08 GMT)
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bsp - может быть british standard ...

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Note added at 15 mins (2004-06-29 08:11:13 GMT)
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but should be Black Steel Pipe \' 100%


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Note added at 18 mins (2004-06-29 08:13:32 GMT)
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British Standard Pipe (diameter)3/4 дюйма
тоже 100% :0)

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Note added at 26 mins (2004-06-29 08:21:54 GMT)
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http://www.evergreen.edu/biophysics/technotes/fabric/pipe.ht...

Notes
Pipe Size is the accepted industry designation and does not refer to either the inside or the outside diameter (ID or OD) of a pipe or a fitting.

American National Standard Pipe Threads
NPT: National Pipe Taper Thread
A sealant compound or Teflon tape must be used for a leak-free seal.
FPT: female (internal) National Pipe Taper threads
MPT: male (external) National Pipe Taper threads
NPTF: Dryseal American National Standard Taper Pipe Thread
No sealant is needed for a seal.
NPS: American Standard Straight Pipe Thread
Used for mechanical joining -- holding a fitting in place. An O-ring or a metal seal is required.
NPSF: Dryseal American National Standard Straight Pipe Thread

British Standard Pipe Thread
BSPT: British Standard Pipe Taper threads
BSPP: British Standard Pipe Parallel (straight) threads


Other Resources
Tapping and Clearance Drills
Fractional Machine Screws
Number Machine Screws
Metric Machine Screws
Starrett Reference Tables
Download the tables as:
An Abode PDF file
A zipped Microsoft Excel spreadsheet


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Note added at 11 hrs 29 mins (2004-06-29 19:24:52 GMT)
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кстати маленькое уточнение - резьба трубная КОНИЧЕСКАЯ

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Note added at 11 hrs 30 mins (2004-06-29 19:26:19 GMT)
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в отличие от straight + потому и уплотнение идет без дополнительных прокладок для NPT(f)