Valves — Flanged, Threaded and Welding End
Purpose of ASME B16.34-2025
ASME B16.34-2025, titled Valves — Flanged, Threaded, and Welding End, is a standard developed and published by the American Society of Mechanical Engineers (ASME). Its primary purpose is to establish minimum requirements for the design, materials, manufacturing, testing, and inspection of valves with flanged, threaded, or welding end connections used in pressure piping systems. The standard covers a wide range of valve types, including gate, globe, check, ball, and butterfly valves, ensuring safety, reliability, and performance under specified pressure and temperature conditions. It aims to promote standardization, compatibility, and safety in valve applications, reducing risks such as leaks, pressure failures, or material degradation in critical systems.
Typical Use
ASME B16.34-2025 is typically applied in the design, procurement, installation, and maintenance of valves in industries such as oil and gas, chemical processing, power generation, water treatment, and HVAC. Common applications include:
Engineers, manufacturers, and inspectors use the standard during project phases to:
The standard is often used in conjunction with other ASME codes, such as B31.3 for process piping or B16.5 for flanges, and is referenced in project specifications, procurement contracts, and regulatory requirements. The 2025 edition includes updates such as revised pressure-temperature ratings, new material specifications, and clarifications on testing protocols, reflecting advancements in valve technology and industry practices.
| SDO | ASME: American Society of Mechanical Engineers |
| Document Number | B16.34 |
| Publication Date | May 30, 2025 |
| Language | en - English |
| Page Count | 43 |
| Revision Level | |
| Supercedes | |
| Committee |