What is the difference between API 600 and API 594?
API 594, formally titled "Check Valves: Flanged, Lug, Wafer, and Welded Types," is an industry standard meticulously developed by the American Petroleum Institute (API). It details specific requirements for check valves in various aspects, including design, material selection, structural dimensions, pressure and temperature withstand capabilities, and inspection and testing. This standard covers various types of check valves, including flanged, lug, wafer, and welded types, providing clear guidance for the quality and performance of these products.
API 600 is a standard developed by the API for steel gate valves, specifically covering flanged and welded steel gate valves, bolted bonnets, etc. This standard is widely used not only to guide the design and manufacture of steel gate valves but also as an important basis for verifying the performance of these valves.
1. Standard Nature and Scope
API 600: Applicable to steel gate valves in the oil and gas industries, covering design, materials, manufacturing, and testing requirements.
API 594: Specifically for check valves (such as swing and lift valves), specifying their design, materials, manufacturing, and testing requirements.
2. Core Content Differences
API 600:
Design Specification: Emphasizes versatility, applicable to various industrial scenarios.
Manufacturing Requirements: Provides clear requirements for the manufacturing processes and quality control of key components such as the valve body, bonnet, and stem.
Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.
API 594:
Design Specification: For check valves, specifying their structural, dimensional, and material requirements.
Manufacturing Requirements: Includes the manufacturing processes and quality control of key components such as the valve body, bonnet, and stem.
Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.
3. Applications
API 600: Applicable to the selection of steel gate valves in industries such as oil and gas.
API 594: Applicable to the selection of check valves in industries such as oil and gas.
API 600 Valve and API 594 Valve in stock
