| ASTM | DIN | Worknorme |
| A-105 | EN 10222-3 C 22.8 | 1.0460 |
| A-350 LF2 | - | - |
| A-694 F52 | - | - |
Forged Carbon steel standards for valves
ASTM A105 / A105M - 09
Standard Specification for Carbon Steel Forgings for Piping Applications
This specification covers standards for forged carbon steel piping components, that is,
flanges, fittings, valves, and similar parts, for use in pressure
systems at ambient and higher-temperature service conditions. Materials shall be subjected to heat
treatment (annealing, normalizing, tempering, or quenching). Material shall conform to carbon,
manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum and vanadium contents.
The forgings shall be subjected to tension, hardness and hydrostatic tests, with the latter
applicable when required. Material shall adhere to tensile strength, yield strength, elongation,
reduction of area, and hardness requirements. Guidelines for retreatment, repair by welding, and
product marking are given.
ASTM A350 / A350M - 07
Standard Specification for Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components
This specification covers several grades of carbon and low alloy steel forged for ring-rolled flanges, forged fittings and valves for low-temperature service.
The steel specimens shall be melt processed using open-hearth, basic oxygen, electric furnace or vacuum-induction melting. A sufficient discard shall be made to
secure freedom from injurious piping and undue segregation. The materials shall be forged and shall undergo heat treatment such as normalizing, tempering, quenching
and precipitation heat treatment. Heat analysis and product analysis shall be performed wherein the steel materials shall conform to the required chemical compositions
of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, copper, columbium, vanadium, and nitrogen. The materials shall also undergo tension tests
and shall conform to the required values of tensile strength, yield strength and elongation. Impact tests shall also be performed and the steel materials shall conform to
the required values of minimum impact energy, temperature, and minimum equivalent absorbed energy. Hardness and hydrostatic tests shall also be performed.
ASTM A694 / A694M - 08
Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service
Esta especificación cubre aceros forjados al carbono y aleados para bridas de tuberías, conexiones, válvulas, y componentes para servicio de transmisión a altas presiones. Un analisis químico en caliente del acero ha de realizarse,
y la compisición química del acero debe ser conforme las especificaciones. Materials adhere to testing and tensile property requirements as well.
ASTM A266 / A266M - 03a(2008)
Standard Specification for Carbon Steel Forgings for Pressure Vessel Components
This specification covers four grades of carbon steel forgings for boiler and pressure vessel components, and associated equipment. Materials shall be manufactured by melting process and hot-worked forging. Heat and product
analyses shall be performed wherein forgings shall conform to chemical requirements for carbon, manganese, phosphorus, sulphur, and silicon. Mechanical properties such as tensile strength, yield strength, elongation, and
reduction of area shall be inspected as well. The requirements for annealed, normalized, or normalized and tempered steel forgings, and that for quenched and tempered steel forgings have been specified separately.
EN 10222-1:1998/A1:2002
Steel forgings for pressure purposes
- Part 1 : General requirements for open die forgings
EN 10222-2:1999/AC:2000
Steel forgings for pressure purposes
- Part 2: Ferritic and martensitic steels with specified elevated temperature properties
EN 10222-3:1998
Steel forgings for pressure purposes
- Part 3: Nickel steels with specified low temperature properties
EN 10222-4:1998
Steel forgings for pressure purposes
- Part 4: Weldable fine grain steels with high proof strength
EN 10222-5:1999/AC:2000
Steel forgings for pressure purposes
- Part 5: Martensitic, austenitic and austenitic-ferritic stainless steels
