Piping Materials of Construction

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Following is the list of Most Commonly Used ASTM Piping Materials.

ASTM Materials for Pipes

  1. ASTM A53 : Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless.
  2. ASTM A106 : Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
  3. ASTM A672 : Standard Specification for Electric-Fusion-Welded Steel Pipe for High-Pressure Service at Moderate Temperatures.
  4. ASTM A335 : Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service.
  5. ASTM A312 : Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
  6. ASTM A333 : Standard Specification for Seamless and Welded Steel Pipe for Low-Temperature Service and Other Applications with Required Notch Toughness.

ASTM Materials for Forged Fittings

  1. ASTM A105 : Standard Specification for Carbon Steel Forgings for Piping Applications
  2. ASTM A181 : Standard Specification for Carbon Steel Forgings, for General-Purpose Piping.
  3. ASTM A182 : Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service.
  4. ASTM A 350 : Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
  1. ASTM A105 Gr. I or II : Carbon Steel for Intermediate Temperature : -5 to 415 deg.C.
  2. ASTM A182 Gr. F304 : Stainless Steel :
  3. ASTM A182 Gr. F1, F11, F12, F22 for above 415 to 600 degree C, corresponding to pipe grades of A335 P1, P11 and P12, P22.
  4. ASTM A350 Gr. LF1, LF2 or LF3 : Low temperature carbon steel. Change grade based on corresponding pipe grades of A333 Grade. 1, or 3.
  5. ASTM A182 Gr. 304H, 315H, 321H and 347H for above 600 to 815 deg.C, corresponding to pipe grades at this temperature range. Change as per corrosive properties of material by process licensor.
  6. ASTM A182 Gr. F304, F304L and F316, F347 For Cryogenic Temperatures Corresponding to pipe grades of ASTM A312 TP 304, 304L and 347. Choose by process licensor based on corrosivity.

ASTM Materials for Plate Fabricated Fittings

 

Clause Details
MOC-PM-001 MOC is based on Corrosiveness, Toxicity, Flammability, Viscosity, Operating Pressure, Operating Temperature of the fluid. as well as
MOC-PM-002  MOC is also base on availability, Economy, Environment (Desert, Temperate, Marine) etc.
MOC-PM-003 MOC also depends on the way that component is manufactured i.e. by casting, Forging, Using plates.
MOC-PM-004 All Big bore flanged valves and components are mostly manufactured by Casting.
MOC-PM-005  Small bore flanged valves, socket welded and threaded components are mostly forged.
MOC-PM-006 Components like spectacle blind, Strainers etc. are made using plates.
 MOC-PM-007  Killed Steel : During Steel making process oxygen present is removed by adding Silica (De oxidizing agent).
 MOC-PM-008 Materials are selected based on their mechanical and metallurgical properties.
 MOC-PM-009 Mechanical properties: strength, ductility, hardness, brittleness, toughness
 MOC-PM-0010 Metallurgical properties: Chemical composition, weldability.
 MOC-PM-0011 Carbon increases strength of steel but decreases weldability.
 MOC-PM-0012  Carbon steel used in piping has carbon content between 0.15% to 0.30%.
 MOC-PM-0013  Low alloy steels have alloying elements less than 5%.
 MOC-PM-0014  High alloy steels have alloying elements more than 5%
 MOC-PM-0015 Stainless Steel has Cromium content more than 11% and less than 30% and other alloying elements Nickel, Molybdenum etc.
 MOC-PM-016 Stainless steel becomes corrosion resistant (passive) because of formation of un-reactive film of Chromium Oxide  (Cr2O3) which adheres tightly to the surface of metal.
 MOC-PM-017 Austenitic Stainless Steel are alloys of Cr, Ni, Fe. Example: Type 304, 304L,316,316L
 MOC-PM-018 Austenitic Stainless Steels have Face centered Cubic lattice (fine grain structure).
 MOC-PM-019 Austenitic Stainless Steels are Non-Magnetic.
 MOC-PM-020 Austenitic Stailess Steels have high Corrosion resistance at temp up to 1500 deg. F.
 MOC-PM-021 Austenitic Stainless Steels are hardenable by cold woking.
 MOC-PM-022 Austenitic Stainless Steels possess high impact strength at low temp.
 MOC-PM-023 Nickel in steel increases resistance to mineral acid, produces tightly adhering High temperature oxides.
 MOC-PM-024 Molybdenum in steel increases resistance to chloride (Pitting Corrosion).
 MOC-PM-025 Copper in steel increases resistance to sulphuric acid.
 MOC-PM-026 Titanium in steel stabilize carbides to prevent formation of chromium carbide.
MOC-PM-027 Niobium in steel stabilize carbides to prevent formation of chromium carbide.
 MOC-PM-028  Lower Carbon content of 304L, 316L and 317L help reduce sensitization.
 MOC-PM-029  Sulfur and Selenium increases machinability of the steel. e.g. 303, 303se
 MOC-PM-030  Lack of nickel in stainless steel makes it magnetic.

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