Piping Standards :: British ‘vs” American

British (BSi) & American (ASTM) piping standards – specifications, grades and material descriptions..

The table below compares some British (BSi) and American (ASTM) piping standards:

ASTM InternationalBSi – British Standards instituteMaterial
A1201387 (BS EN 10255:2004)Carbon Steel
A53 Gr. A3601/320Carbon Steel
A53 Gr. B3601/410Carbon Steel
A106 Gr. A3602/360Carbon Steel
A106 Gr. B3602/410Carbon Steel
A333 Gr. 33603/503Killed Carbon Steel
A333 Gr. 63603/410 
A333 Gr. 83603/5903.5% nickel
API 5L Gr. A3601/23Carbon Steel
API 5L Gr. B3601/27Carbon Steel
A335 Gr. P53604/6255% Cr 1/2% Mo
A335 Br. P93604/6299% Cr 1% Mo
A335 Gr. P113604/6211 1/4% Cr 1/2% Mo
A335 Gr. P123604/6201% Cr 1/2% Mo
A335 Gr. P223604/6222 1/4% Cr 1% No
A312 Gr. Tp 3043605/304 S18 (EN58E)Austenitic chromium nickel
A312 Gr. Tp 304H3605/304 S59Austenitic chromium nickel
A312 Gr. Tp 304L3605/304 S14Austenitic chromium nickel (extra low carbon)
A312 Gr. Tp 3163605/316 S18 (EN58J)Austenitic chromium nickel molybdenum bearing
A312 Gr.Tp 316L3605/316 S14Austenitic chromium nickel molybdenum bearing (extra low carbon)
A312 Gr. Tp 3213605/321 S18 (EN58B)Austenitic chromium nickel titanium stabilized
A312 Gr. Tp 3473605/347 S18 (EN58G)Austenitic chromium nickel nobelium stabilized
  • A 333 – Seamless and Welded Pipe for Low-Temperature Service
  • A 53 – Welded and Seamless Steel Pipe
  • A 106 – Seamless C-Steel Pipe for High Temperature Service
  • A 335 – Seamless Ferritic Alloy Steel Pipe for High Temperature Service
  • A 312 – Seamless and Welded Austenitic Stainless Steel Pipe
  • API 5L – Specification for Line Pipe
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  • BS 1387 – Steel Tubes and Tubulars Suitable for Screwing to Bs 21 Pipe Threads – Replaced by BS EN 10255:2004 Non-alloy steel tubes suitable for welding or threading. Technical delivery conditions
  • BS 3601 – Steel Pipes and Tubes for Pressure Purposes Carbon Steel with Specified Room Temperature Properties – Replaced by BS EN 10216-1:2002 Seamless tubes for pressure purposes – Non-alloy steel tubes with specified room temperature properties, BS EN 10217-1:2002 Welded steel tubes for pressure purposes – Non-alloy steel tubes with specified room temperature properties
  • BS 3602 PART1 – Steel Pipes and Tubes for Pressure Purposes : Carbon and Carbon Manganese Steel with Specified Elevated Temperature Properties – Replaced by BS EN 10216-2:2002 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties
  • BS 3602 PART2 – Steel Pipes and Tubes for Pressure Purposes : Carbon and Carbon Manganese Steel with Specified Elevated Temperature Properties – Replaced by BS EN 10216-2:2002 Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified elevated temperature properties
  • BS 3603 – Steel Pipes and Tubes for Pressure Purposes Carbon and Alloy Steel with Specified Low Temperature Properties – Replaced by EN10216-4:2002 Seamless steel tubes for pressure purposes. Technical delivery conditions
  • BS 3604 – Steel pipes and tubes for pressure purposes: ferritic alloy steel with specified elevated temperature properties. Specification for longitudinally arc welded tubes
  • BS 3605 PART1 – Seamless and Welded Austentic Stainless Steel Pipe and Tubes for Pressure Purposes – Replaced by BS EN 10216-5:2004 Seamless steel tubes for pressure purposes. Technical delivery conditions. Stainless steel tubes.
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