DN and NPS

  • sabir
  • sabir's Avatar Topic Author
  • Offline
  • Senior Member
  • Senior Member
More
16 years 5 months ago - 16 years 5 months ago #7220 by sabir
DN and NPS was created by sabir
How can we relate DN and NPS…???

Thank you,

Regards,

Sabir

Please Log in or Create an account to join the conversation.

More
16 years 5 months ago - 16 years 5 months ago #4314 by Anton
Replied by Anton on topic Sabir, These are different terms for
Sabir,

These are different terms for expressing pipe size.

The size of pipes, fittings, flanges and valves are often given in inches as NPS - Nominal Pipe Size, or in metric units as DN - "Diametre Nominel"

It is common to identify pipes by inches using NPS or "Nominal Pipe Size". The metric equivalent is called DN or "diametre nominel".

The metric designations conform to International Standards Organization (ISO) usage and apply to all plumbing, natural gas, heating oil, and miscellaneous piping used in buildings.

The use of NPS does not conform to American Standard pipe designations where the term NPS means "National Pipe Thread Straight".

- If you're the smartest person in the room ... you're in the wrong room.

Please Log in or Create an account to join the conversation.

  • Buggernuts
  • Buggernuts's Avatar
  • Visitor
  • Visitor
16 years 5 months ago - 16 years 5 months ago #4315 by Buggernuts
Replied by Buggernuts on topic Also, (and I might not
Also, (and I might not be correct on this), but for NPS sizes (up to 14" or so) the OD of the pipe is greater than the NPS, eg for a 2" NPS the OD is 2.375" and the wall thickness / schedule is taken off this OD, giving a 'nominal' neutral axis of 2", whereas in DN sizes the line size stated is always the OD (ie DN80 is 80mm Outside Diameter).??

Please Log in or Create an account to join the conversation.

More
16 years 5 months ago - 16 years 5 months ago #4316 by gpsvn
Replied by gpsvn on topic DN sizes the line size

DN sizes the line size stated is always the OD (ie DN80 is 80mm Outside Diameter).??


That's not true.

The DN80 (or NPS 3) has OD of 89 mm.

For NPS 14 (or DN350) and larger, the NPS (or DN) is equal to the outside diameter (OD) in inch (or mm)

Please Log in or Create an account to join the conversation.

  • Buggernuts
  • Buggernuts's Avatar
  • Visitor
  • Visitor
16 years 5 months ago - 16 years 5 months ago #4317 by Buggernuts
Replied by Buggernuts on topic I stand corrected!!! But I did
I stand corrected!!!

But I did say I might not be right on this!!

Please Log in or Create an account to join the conversation.

Moderators: Jop
Time to create page: 0.229 seconds