2024 Valve Standards and Specifications

July 11th 2024

2024 Valve Standards and Specifications

In industrial piping systems, valves play a crucial role in controlling the flow and pressure of gases and liquids. Various standards and specifications ensure that these valves perform reliably and safely across different applications. Valve standards cover all aspects from material selection and structural design to functional testing to ensure that valves can operate reliably under expected conditions. Here are some common valve standards and their contents:

Major Valve Standards Organizations

  • American Petroleum Institute (API)

    API has developed numerous valve standards related to the oil and gas industry, such as API 600 and API 602.

  • American Society of Mechanical Engineers (ASME)

    ASME has developed extensive Boiler and Pressure Vessel Codes (BPVC), which include several sections related to valves.

  • International Organization for Standardization (ISO)

    ISO provides valve standards covering various industrial applications.

  • British Standards Institution (BSI)

    BSI offers many valve standards applicable to different industrial sectors.

Common Valve Standards

API 600 and API 602

  • API 600 Steel Gate Valves: Specifies the design and testing requirements for steel gate valves suitable for high-pressure and high-temperature applications.

  • API 602 Steel Gate Valves: Designed for small-sized, high-pressure applications, typically used in the oil and gas industry.

ASME B16.34

Covers the design, materials, and testing requirements for industrial valves with flanged, threaded, and welding end connections.

ISO 5208

Provides standard methods for valve pressure testing to ensure that valves do not leak under working pressure.

BS EN 593

Covers the design, materials, manufacture, and testing requirements for butterfly valves.

Detailed Discussion on Key Valve Standards

API 602: Steel Gate Valves

API 602 is a standard specification for small-sized, high-pressure gate valves used in the oil and gas industry. These valves come with flanged and butt-welding ends and bolted bonnets, providing robust solutions for smaller pipelines in the petroleum industry.

API 600: Steel Gate Valves

API 600 specifies requirements for steel gate valves with flanged and butt-welding ends and bolted bonnets. These valves are designed for high-pressure and high-temperature applications, offering robust performance in demanding environments. They are commonly used in the natural gas industry and other sectors where reliability is critical.

Lug and Wafer Type Valves

Lug and wafer-type valves are essential components in applications requiring compact and lightweight solutions.

  • Lug-type valves: Have threaded inserts, allowing them to be bolted to flanges on both ends. This design facilitates maintenance without disturbing the entire piping system.

  • Wafer-type valves: Are sandwiched between flanges, offering a more economical solution while maintaining reliable performance.

Double Flanged Lug Valves

Double-flanged lug valves are a subset of lug-type valves that provide additional security with flanges on both sides. This design is particularly useful in applications where the valve needs to be installed or removed without compromising the system's integrity. These valves are commonly used in high-pressure and high-temperature environments.

Ball Valves: Flanged and Threaded

Ball valves are versatile components used in various industries. They come in different configurations, including flanged and threaded types.

  • Flanged ball valves: Typically used in applications where a secure, leak-proof connection is crucial, making them ideal for high-pressure scenarios due to their robust design.

  • Threaded ball valves: Offer easy installation and removal, making them suitable for systems where quick maintenance is necessary.

Pressure Relief Valves and High-Pressure Applications

Pressure relief valves are critical safety devices in high-pressure systems. They prevent over-pressurization by automatically releasing excess pressure. Standards for pressure relief valves ensure they operate reliably under extreme conditions, safeguarding both equipment and personnel.

Pressure Temperature Rating and Face-to-Face Dimensions

The pressure-temperature rating of a valve indicates the maximum pressure it can withstand at a given temperature. This rating is essential for selecting valves suitable for specific applications.

  • Face-to-face dimensions: Refer to the distance between the two ends of a valve. Standardized face-to-face dimensions ensure the compatibility and interchangeability of valves within a piping 

ASME BPVC and Cast Iron Valves

The ASME Boiler and Pressure Vessel Code (BPVC) provides comprehensive guidelines for the design, fabrication, and inspection of boilers and pressure vessels. Valves used in these applications must comply with ASME BPVC standards to ensure safety and performance. Cast iron valves, known for their durability and cost-effectiveness, are often used in lower-pressure applications within the guidelines set by ASME BPVC.

Standards and Specifications for the Natural Gas Industry

The natural gas industry relies heavily on stringent standards and specifications to ensure the safe and efficient transport of gas. Valves used in this industry must meet high standards for pressure, temperature, and corrosion resistance. Compliance with standards like API, ASME, and others ensures that valves perform reliably under the harsh conditions typical of natural gas operations.

Importance of Valve Standards

Ensuring Safety

Valves play a crucial role in many industrial processes, especially in high-pressure and high-temperature environments. Standards ensure that valves can operate safely under these conditions.

Improving Reliability

Standardized design and testing processes ensure that valves can reliably function throughout their expected lifespan, reducing failure rates.

Compatibility and Interchangeability

Standardization ensures the compatibility and interchangeability of valves and components produced by different manufacturers, facilitating maintenance and replacement.

Regulatory Compliance

Valves that comply with industry standards typically also meet relevant regulatory requirements, helping companies adhere to legal and safety regulations.


Understanding valve standards and specifications is crucial for selecting the right valve for any application. From API 602 steel gate valves to ball valves and pressure relief valves, these guidelines ensure that valves meet the rigorous demands of high-pressure and high-temperature environments, particularly in critical industries like natural gas. By adhering to these standards, industries can maintain the safety, efficiency, and reliability of their piping systems.

Consult your BAFAW pipe valves and fittings experts




0086 15865327361