American vs. British Piping Standards

US American (ASTM) vs. British (BSi) piping standards - specifications, grades and material descriptions. Compare ASTM International standards with British Standards Institute piping specifications for carbon steel, alloy steel, and stainless steel pipes.

ASTM StandardBSi StandardMaterial Description
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. 63603/410Low-Temperature Carbon Steel
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 Gr. 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% Mo
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
A312 Gr. Tp 316L3605/316 S14Austenitic Chromium Nickel Molybdenum (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 Niobium Stabilized

ASTM Standard Descriptions

  • 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

British Standards Descriptions

  • BS 1387 - Steel Tubes and Tubulars Suitable for Screwing to BS 21 Pipe Threads (Replaced by BS EN 10255:2004)
  • BS 3601 - Steel Pipes and Tubes for Pressure Purposes Carbon Steel (Replaced by BS EN 10216-1:2002 and BS EN 10217-1:2002)
  • BS 3602 - Carbon and Carbon Manganese Steel with Specified Elevated Temperature Properties (Replaced by BS EN 10216-2:2002)
  • BS 3603 - Carbon and Alloy Steel with Specified Low Temperature Properties (Replaced by EN10216-4:2002)
  • BS 3604 - Ferritic Alloy Steel with Specified Elevated Temperature Properties
  • BS 3605 - Seamless and Welded Austenitic Stainless Steel Pipe (Replaced by BS EN 10216-5:2004)
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