Usman Adil

 Profile Answers by Usman Adil Questions by Usman Adil

• Jan 25th, 2009

 

A pipe is a vessel - a tube is structural.

     A pipe is measured ID - a tube is measured OD.

ksreenivasan02

 Profile Answers by ksreenivasan02 

• Jan 26th, 2009

 

Pipe is used as a vessel and is measured by ID (inside diameter). Tubing is usually structural and is measured by OD (outside diameter).

vasujoshi123

 Profile Answers by vasujoshi123 Questions by vasujoshi123

• Feb 11th, 2009

 

Pipe is measuring with nominal bore i.e., NB pipe and tube is measuring with Outer dia i.e., OD Tube.
Both pipe and tube are the materials, which carries substance through them internally and also using them for the heat transfer.

nag_seshu

 Profile Answers by nag_seshu 

• Feb 14th, 2009

 

Pipe is disignated with its Inner dia, wheras Tube is disignated with Outer Diameter.
Tube is flexible, Pipe is Rigid.

Faheem Zaman

 Profile Answers by Faheem Zaman Questions by Faheem Zaman

• May 12th, 2011

 

The metal of a tube is thin ,being proportional only to withstand the steam pressure where as a pipe is made of relatively thick metal,in other words tubes are much lighter than pipes .

kiranaimhigh

 Profile Answers by kiranaimhigh 

• Jun 30th, 2011

 

Pipe is usually denoted by OD x gauge, whereas tube is denoted by ID which is NB x sch. Pipe is used to transfer liquid or gas..whereas tube is used to transfer Heat. Pipe is Flexible,whereas tube is Rigid..

Kathir

• Oct 20th, 2015

 

Pipe is generally used for mass transfer and tube for both mass and heat transfer.. Based on the application we can call it. i.e, we have been calling PVC as pipe irrespective to its size, mass transfer.

krishna

• Nov 27th, 2015

 

Pipe has large diameter than the tube and length of the pipe is larger than the tube...

sumit

• Feb 28th, 2018

 

Pipe is measured with internal dia and Tube is measured with outer dia

Sagar Kurhade

• Oct 24th, 2018

 

Pipes are measured in NPS i.e. Nominal pipe size or we say nominal and not actual pipe size and Tubes are measured in actual diameter.

Example: For 2 inch pipe its nominal diameter is 60.3 mm which is standard diameter of 2 inch pipe.
Now in case of 2 inch tube it differentiate as a or measured by its actual dimeter which is 50 mm (outside dim).

Hence its prove diameter of pipe is greater than diameter of tube.

In short: Tube is measured by outside diameter, the pipe is measured by inside diameter.
There is often confusion as to which size die the customer actually needs - Pipe Size or Tubing Size.
Keep in mind that pipe size refers to a nominal - not actual - inside pipe diameter. Schedule refers to the pipes wall thickness. The actual physical OD is larger than its nominal OD.
The dimensions provided for tubing, on the other hand, refer to the actual outside diameter. In other words, the actual physical OD of a tube is just the same as its nominal OD. The size of a tube will keep the same OD no matter what the wall thickness is.
For example: The actual outside diameter of 1 1/4" pipe is 1.625″ - while 1 1/4" tube has a true 1.25″ outside diameter.
Consequently, both the size of tube and pipe is measured by its OD and the thickness.