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Comparing American and British Piping Standards Comparing US American (ASTM) and British (BSi) piping standards - specifications, grades and material descriptions The table below can be used to compare different British (BSi) and American (ASTM) piping standards.

A120 A53 Gr. A A53 Gr. B A106 Gr. A A106 Gr. B A333 Gr. 3 A333 Gr. 6 A333 Gr. 8 API 5L Gr. A API 5L Gr. B A335 Gr. P5 A335 Br. P9 A335 Gr. P11 A335 Gr. P12 A335 Gr. P22 A312 Gr. Tp 304 A312 Gr. Tp 304H

BSi - British Standards institute 1387 (BS EN 10255:2004) 3601/320 3601/410 3602/360 3602/410 3603/503 3603/410 3603/590 3601/23 3601/27 3604/625 3604/629 3604/621 3604/620 3604/622 3605/304 S18 (EN58E) 3605/304 S59

A312 Gr. Tp 304L

3605/304 S14

A312 Gr. Tp 316

3605/316 S18 (EN58J)

ASTM International

Material Carbon Steel Carbon Steel Carbon Steel Carbon Steel Carbon Steel Killed Carbon Steel 3.5% nickel Carbon Steel Carbon Steel 5% Cr 1/2% Mo 9% Cr 1% Mo 1 1/4% Cr 1/2% Mo 1% Cr 1/2% Mo 2 1/4% Cr 1% No Austenitic chromium nickel Austenitic chromium nickel Austenitic chromium nickel (extra low carbon) Austenitic chromium nickel molybdenum bearing

A312 Gr.Tp 316L

3605/316 S14

A312 Gr. Tp 321

3605/321 S18 (EN58B)

A312 Gr. Tp 347

3605/347 S18 (EN58G)

Austenitic chromium nickel molybdenum bearing (extra low carbon) Austenitic chromium nickel titanium stabilized Austenitic chromium nickel nobelium stabilized

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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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