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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.
| ASTM International | BSi - British Standards institute | Material |
| A120 | 1387 (BS EN 10255:2004) | Carbon Steel |
| A53 Gr. A | 3601/320 | Carbon Steel |
| A53 Gr. B | 3601/410 | Carbon Steel |
| A106 Gr. A | 3602/360 | Carbon Steel |
| A106 Gr. B | 3602/410 | Carbon Steel |
| A333 Gr. 3 | 3603/503 | Killed Carbon Steel |
| A333 Gr. 6 | 3603/410 | |
| A333 Gr. 8 | 3603/590 | 3.5% nickel |
| API 5L Gr. A | 3601/23 | Carbon Steel |
| API 5L Gr. B | 3601/27 | Carbon Steel |
| A335 Gr. P5 | 3604/625 | 5% Cr 1/2% Mo |
| A335 Br. P9 | 3604/629 | 9% Cr 1% Mo |
| A335 Gr. P11 | 3604/621 | 1 1/4% Cr 1/2% Mo |
| A335 Gr. P12 | 3604/620 | 1% Cr 1/2% Mo |
| A335 Gr. P22 | 3604/622 | 2 1/4% Cr 1% No |
| A312 Gr. Tp 304 | 3605/304 S18 (EN58E) | Austenitic chromium nickel |
| A312 Gr. Tp 304H | 3605/304 S59 | Austenitic chromium nickel |
| A312 Gr. Tp 304L | 3605/304 S14 | Austenitic chromium nickel (extra low carbon) |
| A312 Gr. Tp 316 | 3605/316 S18 (EN58J) | Austenitic chromium nickel molybdenum bearing |
| A312 Gr.Tp 316L | 3605/316 S14 | Austenitic chromium nickel molybdenum bearing (extra low carbon) |
| A312 Gr. Tp 321 | 3605/321 S18 (EN58B) | Austenitic chromium nickel titanium stabilized |
| A312 Gr. Tp 347 | 3605/347 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
- 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