Types of piping material used in oil and gas project

Piping in a particular plant can be compared with arteries & veins in our body. There are mainly two types of pipes from manufacturing point of view. The first is Seamless pipes & second is Welded pipes.
Various attributes of pipe are described below.
A) Pipe End Preparation:
There are three types of end preparation of pipes.
(a)      Plain End (PE)
(b)      Butt weld or Beveled End (BW/BE)
(c)      Threaded End
B) Design & Dimension Standard  for pipe manufacturing:
    • This will provide the following information.
      • Nominal Bore (NB),
      • Thickness,
      • Outside Diameter (OD),
      • Tolerance & Weight.

The Dimension Standard for pipe is as follows.
    • ANSI/ASME B 36.10   For Carbon Steel (CS), Low Temperature Carbon Steel (LTCS), Low Alloy Steel (LAS) Pipes
    • ANSI/ASME B 36.19   For Stainless Steel (SS) Pipes
C) Piping Material
I.             Carbon Steel: It is used for temperature range from (–) 290C to 4270C. Most commonly used CS materials are as follows:
·         ASTM A 106 Gr. B                    (Seamless pipes)
·         API  5L Gr. B                            (Seamless & Welded)
·         ASTM A 53 Gr. B                      (Seamless & Welded)
·         IS 1239                                       (Upto 6” & ERW)
·         IS 3589                                       (Above 6”)
(Grade A, B, C Refers the tensile strength of the carbon steel, the grade “C” having high
strength. Commonly we are going with grade “B”.)
II.                LTCS: It is used for low temperature i.e. from (–) 460C to 3430C. The most commonly used LTCS materials are as follows:
·         ASTM A 333 Gr.6  (Seamless pipes)
·         ASME A 671           (Welded pipes)
III.             LAS: It is used for high temperature.
  The most commonly used LAS materials are as follows:
        • ASTM A 335 Gr. P11, P12, P9 (Seamless pipes)
        • ASTM A 691 Gr.C60, C65, C70 (Welded pipes)
IV.      Stainless Steel (SS): It is used for cryogenic temperature range i.e. from (-) 1960C to 5380C. Most commonly used SS materials are as follows:
·         ASTM A 312 TP 304 / ASTM A 312 TP 304L (P/U-Corrosive service, DM Water, Reject Water, Rich Amine, Vacuum Service, wash Oil)
·         ASTM A 312 TP 316 / ASTM A 312 TP 316L (Recycle oil, Heated Atm residue)
·         ASTM A 312 TP 321

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