What are the standards for gate valves?

Gate valves are regulated and standardized by various organizations to ensure their quality, performance, and compatibility with different systems. The standards for gate valves can vary depending on factors such as the intended application, the industry, and the geographical location. Some widely recognized standards for gate valves include:

1. American Petroleum Institute (API):

  - API 600: This standard, published by the American Petroleum Institute, covers the design and materials for steel gate valves in refinery and petrochemical service. It includes specifications for gate valve types, materials, pressure-temperature ratings, and testing procedures.

2. American Society of Mechanical Engineers (ASME):

  - ASME B16.34: This standard by ASME sets the requirements for steel valves, including gate valves. It covers aspects such as design, materials, pressure-temperature ratings, dimensions, and testing procedures.

3. International Organization for Standardization (ISO):

  - ISO 10434: ISO 10434 specifies requirements for bolted bonnet steel gate valves for petroleum and natural gas industries. It covers design, materials, testing, inspection, and marking of gate valves.

4. British Standards Institution (BSI):

  - BS 5150: This British Standard provides specifications for cast iron and cast steel wedge gate valves for general purposes. It covers design, materials, testing, and marking requirements.

5. American Water Works Association (AWWA):

  - AWWA C500: AWWA C500 is a standard that specifically addresses resilient-seated gate valves for water supply service. It includes requirements for materials, design, testing, and dimensions.

6. European Standard (EN):

  - EN 1171: This European Standard specifies requirements for cast iron wedge gate valves for general purposes. It covers dimensions, materials, testing, and marking.

7. MSS (Manufacturers Standardization Society) Standards:

  - MSS SP-70: MSS SP-70 provides guidelines for the design and testing of cast iron gate valves.

It's essential to refer to the specific standards that are applicable to the type, material, and intended use of the gate valve. Compliance with these standards ensures that gate valves meet industry-accepted criteria for safety, reliability, and performance. Additionally, when selecting gate valves, it's important to consider local codes and regulations, as they may influence the required standards for specific applications or regions.