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What is difference between NPS and OD of a pipe?

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Question added by ELDHO GEORGE , MECHANICAL ENGINEER , ARKAD ENGINEERING AND CONSTRUCTION CO. KSA
Date Posted: 2018/04/14
Mohammed Khattab
by Mohammed Khattab , Site Project Manager , Suido Kiko Middel East

NPS : Mean Nominal Pipe Size, it is American standard  set of standard sizes for pipes used for high or low pressures and temperatures

OD : Mean Outside Diameter

NPS- nominal pipe size 

OD-outside diameter 

Kim Wonil
by Kim Wonil , Design development department / 3D Designer , DSP DOHA

NPS - nominal pipe inch size (nomally used simbol ")

 

OD - outside diameter 

 

ali zakaria abdel all
by ali zakaria abdel all , Site Engineer , Ginco General Contracting (L.L.C)

NPS : Mean Nominal Pipe Size.

OD : Mean Outside Diameter.

NPS - nominal pipe inch size 

 

OD - outside diameter

محمدرضا قیم
by محمدرضا قیم , مدرس مهن ميكانيكية , الاعمال السیارات

In fact, NPS is used more than the actual size of the tube as a way to distinguish tubes from each other and name them.

But the OD in the pipe means the outer diameter of the pipe.

Mohammed Hassan
by Mohammed Hassan , Sr.Project Engineer / Site Manager , FMC

Nominal Pipe Size :   for diameter based on inches, and a schedule (Sched. or Sch.) for wall thickness. NPS is often incorrectly called National Pipe Size, due to confusion with national pipe thread (NPT)

Danny Henderson
by Danny Henderson , Construction Area Manager , Rotolo Consultants Inc

NPS is the size of the of the internal diameter of the pipe and OD is the outside diameter of the pipe.

GIHAD IBRAHIM
by GIHAD IBRAHIM , MECHANICAL SUPERVISOR , BGCG

NPS : IS NOMINAL SIZE OF PIPE IN  AMEROCAN STANDARDS  (INCH SIZES)AND THEY ARE STANDARD VALUES LIKE STEPS OF PIPE SIZES   , OD : IS OUTSIDE DIAMETER OF PIPE  THUS TWO VALUES ARE CONSTANT ACCORDORING TO STANDARDS . NOTE THE SAME SIZE OF NPS HAS SEVERAL SCHDULES  THAT WILL CHANGE WALL THICKNESS AND INTERNAL DIAMETER ACCORDING TO PRESSURE USES 

Aamir MAlik
by Aamir MAlik , Mechanic , Qatar Diar - Saudi Bin Laden Group (QD-SBG) at Hamad International Airport, Cargo Complex

 Mean Nominal Pipe Size.

nominal pipe inch size (nomally used simbol 

Rajesh kumar  Lal
by Rajesh kumar Lal , Project Manager , Al-Muftah Contracting Co. WLL

NPS : Mean Nominal Pipe Size.

OD : Mean Outside Diameter.

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