YHMCO - Pipe Size brief explanation

NPS DNnominal pipe size diameter normal

North American European

Inch millimeter

Not “national pipe size”

NB (nominal bore) can be used

interchangeably with NPS.

NPS【inch】

DN 【mm】

SU（JIS B 2309）【mm】

1” 25 30

1.1/4” 32 40

1.1/2” 40 50

2” 50 60

2.1/2” 65 75

3” 80 80

4” 100 100

5” 125 125

6” 150 150

8” 200 200

10” 250 250

For NPS of 5 and larger, the DN is equal to the NPS multiplied by 25.

(not 25.4)

JIS B 2309:Butt-welding pipe fittings for light gauge stainless steel tubes for ordinary use

The relation between NPS, DN and SU

References:WIKIPEDIA - Nominal Pipe Size

WIKIPEDIA - Pipe (fluid conveyance)

PIPING ENGINEERING - Nominal Pipe Size NPS, Nominal Bore NB, Outside Diameter OD

Robert Huang

[email protected]

+886-4-2681-5496

No.69, Yu-Shih Rd., Dajia Dist. Taichung City , Taiwan

http://www.yhmco-daja.com/

http://en.wikipedia.org/wiki/Nominal_Pipe_Size

http://en.wikipedia.org/wiki/Pipe_(fluid_conveyance)



http://www.piping-engineering.com/nominal-pipe-size-nps-nominal-bore-nb-outside-diameter-od.html



https://www.youtube.com/watch?v=maSKKfjiZVg

https://twitter.com/RobertHuang10

https://plus.google.com/u/1/b/117729790197749901817/117729790197749901817/posts

http://www.linkedin.com/company/tachia-yung-ho-machine-industry-co.-ltd.?trk=nav_account_sub_nav_company_admin

Date post:	02-Jul-2015
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YHMCO - Pipe Size brief explanation

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