Piping Materials : Steel Pipes

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Pipes are the main component transporting fluid from one place to another. They must be carefully chosen for long term safe opration of the plant. Their selection mainly involves choice of :

  1. Material of Construction.
  2. Nominal Pipe Size.
  3. Wall Thickness.
  4. Pipe End Type.

Straight pipe is supplied in ‘random’ lengths (17 to 25 ft), and sometimes ‘double random’ lengths (38 to 48 ft), if preferred. Wall thickness of pipes is defined by ‘schedule nurnber, ‘API designation’, or ‘weight’. Non-standard pipe is specified by nominal size with wall thickness stated.

Most widely used dimensional standards for Steel Pipes are ASME B36.10M and ASME B36.19M. ASME B36.10M …Read More..
Size of pipe is defined by Nominal Pipe Size.  They are defined in dimensional standards …Read More..
There are three different sources of Pipe Wall Thicknesses :- The American National Standards Institute …Read More..
Selection of Material of Construction for steel pipes depends on their Design Temperature, and Fluid …Read More..
Specifying Pipes in PMS involves indication of following information. Size Range Size range specified will be as …Read More..
Dear friends, I have created this pipe thickness calculator to calculate required pipe thickness for …Read More..
Steel pipes are sometimes lined with material which can withstand chemical attack of highly corrosive …Read More..
Applicable Codes and Standards Material supplied shall be strictly in accordance with the latest codes …Read More..
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Pressure ratings for steel pipe at different temperatures are calculated according to the applicable code for the project such as ANSI B31.3 Code for Pressure Piping,

Radiography requirements are normally specified on applicable code e.g. B31.3  specifies 100% Radiogrphy for seam for Welded Pipes.

Carbon-steel pipe zinc-coated by immersion into molten zinc (hot-dip galvanized) is used for conveying drinking water, instrument air and various other fluids.

During procurement of Pipes, Technical Supply Conditions are provided to vendors for supply of proper piping material with quality assurance.

  1. Typical Technical Supply Conditions for Pipes
  2. Sample Pipe Price Schedule

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