Basics of Pipes

Pipe:

It is cylindrical conduit or tube used to transfer fluids (e.g: liquid,gas ) or solids ( e.g: Powder, Pellets ) or semis solids ( e.g: Crude Oil ) under pressure from one point to another point.

Stresses in Pipes:
  1. Hoop stress or Cyllindrical Stress
  2. Axial Stress
  3. Radial Stress
Pipes Designator:
  1. IPS (Iron Pipe Size)
  2. NPS (Nominal Pipe Size)
  3. NB (Nominal Bore)
  4. DN (Diameter Nominal)

IPS:

it is  dimensionless size designator of pipe. it represent the Inside diameter of pipe in inches.

e.g: IPS6 means Inside diameter is 6″.

NPS:

it is  dimensionless size designator of pipe. it represent the Outside diameter of pipe in inches.

e.g: NPS6 means OD of Pipe is 6.625″ or NPS14 means OD of Pipe is 14″.

NB:

it is  dimensionless size designator of pipe. it represent the Outside diameter of pipe in millimeter.

e.g: NB100 or 100NB means OD of Pipe is 114 mm.

DN:

it is  dimensionless size designator of pipe. it represent the Outside diameter of pipe in millimeter.

e.g: NB100 or 100NB means OD of Pipe is 114 mm.

it is same as NB.

Small Bore Pipe:

Pipes having Size less than NPS 2 or 40 NB is called Small Bore Pipes.

Big Bore Pipe:

Pipes having Size greater than or equal to NPS 2 or 40 NB is called Big Bore Pipes.

Pipe Wall Thickness:

Pipe wall thickness is represent in terms of Schedule Number or Pipe Weight.

Schedule No. – 5,5S,10,10S,40,40S,80,80S,160,160S

Number with S represent for stainless pipe & Number without S represent Carbon steel or Alloy Steel pipes.

Pipe Weight – STD,XS,XXS

STD means Standards Weight Thickness

XS means Extra Strong Thickness

XXS means Double Extra Strong Thickness.

Leave a Reply

Your email address will not be published. Required fields are marked *