Line Pipe Schedule 80 Dimension, Weight and Thickness Chart

oilfield Chart - Line Pipe Schedule 80 Dimension, Weight and Thickness Chart

The line pipe’s major function in the oil and gas industry is the transmission or conveyance of fluids. Generally, the transport of fluid is conducted under a certain level of pressure which makes the internal diameter (ID) a critical line pipe dimension.

The ID changes with the wall thickness of the pipe such that as the wall thickens, it effectively decreases the ID. While certain schedules have the same outside diameter, which is fixed, they correspond to a series of different wall thicknesses which are necessary to bear the fluid’s pressure during transmission. Such are shown in the chart of line pipe schedule 80 dimension, weight, and thickness. 

Pipe Schedules

The pipe schedules available in the market are manufactured based on specifications that are compliant with standards set by organizations such as the Association of American Mechanical Engineers (ASME).  The pipe can be seamless, welded wrought steel, or the costlier stainless steel. The schedules are presented as numbers prefixed by SCH and suffixed with the letter ‘S’ if this is stainless steel pipe.

The most commonly used are pipe schedule 40 and 80; they are manufactured in large volume or quantities. While these are the most in-demand schedules, the latter is thicker than the former. The features of pipe schedule 80 are outlined in the line pipe schedule 80 dimension, weight, and thickness table shown below.

Simply put, the larger the number is, the thicker the surface wall and the higher the pipe’s resistance become. The schedule number is computed by coming up with an approximate value using the following formula:

Schedule Number = P/S x 1000

Where: P stands for design pressure, while S is the allowable stress of material expressed in pounds per square inch or psi.

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Line Pipe Schedule 80 Dimension, Weight and Thickness Chart

Nom. Size (in)OD (in)OD (mm)Wall Thkns (in)Wall Thkns (mm)Wgt (lb/ft)Wgt (kg/m)
wdt_IDNom. Size (in)OD (in)OD (mm)Wall Thkns (in)Wall Thkns (mm)Wgt (lb/ft)Wgt (kg/m)
61 1/41.6642.20.1914.8534.47
71 1/21.948.
92 1/22.875730.2767.017.6611.41

Pipe Dimensions

Based on the above chart, steel pipe’s dimensions include the outer diameter or OD, wall thickness or WT, and length which ranges from 20 ft or 6 meters to 40 ft or 12 meters.

Given these dimensions, the weight of the pipe, the amount of pressure it can withstand, and its cost per foot or meter can be calculated.

Pipe dimensions can be expressed as follows:

  • Wall thickness can be expressed as pipe schedule
  • Diameters can be expressed as the nominal pipe size (NPS) which is the standard used in  nominal diameter (DN)
  • Pipe weight class (WGT) can be expressed in pounds per foot or kilogram per meter

Line Pipe Schedule 80 Dimension, Weight and Thickness Chart Abbreviations:

  • OD – Outside Diameter
  • in – inches
  • mm – millimeter
  • lb/ft – pounds per feet
  • kg/m – kilogram per meter
  • Wgt – Weight
  • Nom. Size – Nominal Size
  • Wall Thkns – Wall Thickness

Go here if you are looking for the Line Pipe Schedule 30 Dimension, Weight and Thickness Chart.