[karthik]

Hi,
We all are aware that for Pipe we usually use NPS are NB to identify a pipe.
I have gone through the articles in “Training” and I had bit clearer picture but still then could anyone please clarify for me how do we differentiate NB from NPS.
One more thing, 1″ should be 25.4 mm but pipe OD is 33.4 mm but when we see 14″ pipe its OD is 14″ (355.6)mm.
Why does the OD after 14″ remain same & OD 12″ and below varies?
Its a basic question but I had some doubt .

[Author]

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