1. Core positioning of ASTM standards
ASTM (American Society for Testing and Materials) standards mainly regulate the material properties of valves and manufacturing processes, rather than directly defining the design or testing requirements of the valve. Its core role is to provide basic material specifications for valve production, such as carbon steel, stainless steel and other metal materials, chemical composition, mechanical properties and other indicators.
2. Valve-related ASTM material standards
Carbon steel materials
ASTM A216: cast steel materials for high temperature conditions (such as WCB grade), applicable to gate valves, globe valves, valve body and pressure-bearing parts.
ASTM A105: forging carbon steel standard, commonly used in flanges, valve stems and other forging parts processing.
Stainless steel materials
ASTM A351: austenitic stainless steel casting standards (such as CF8M corresponds to 316 stainless steel), for corrosion-resistant valves.
ASTM A182: stainless steel forgings standard (such as F316), used for valve stems, seals and other precision parts.
Special Alloys
ASTM A494: nickel-based alloy casting standards (such as Monel alloy), for extreme corrosive environments.
3. ASTM and other standards related to
Design standard references
API 6D (petroleum pipeline valves) and ASME B16.34 (valve pressure design) and other standards, explicitly require that the valve material needs to comply with ASTM specifications.
For example, API 600 (steel gate valve) provides that the valve body material to meet the ASTM A216 or ASTM A351 standards.
Process and Test Requirements
Heat treatment processes (e.g., normalising, quenching) defined in the ASTM standard directly affect the mechanical properties of the valve.
Material testing needs to follow the ASTM E8 (tensile test), ASTM E18 (hardness test) and other supporting methods and standards.
4. Typical application scenarios
High-temperature and high-pressure valves: ASTM A217 (chromium-molybdenum steel) used in power station boiler valves, resistant to steam environments above 540 ℃.
Corrosion-resistant valves: ASTM A351 CF8M (316 stainless steel) is widely used in chemical media pipelines.
Cryogenic valves: ASTM A352 LCB / LCC (low-temperature carbon steel) for LNG and other deep-cooling conditions.
Summary: ASTM standards in the field of valves to material specifications as the core, covering carbon steel, stainless steel and special alloys of the chemical composition, mechanical properties and processing technology, and with API, ASME and other standards synergistically constitute a complete technical system
