api 594 vs api 602
API 594-2022, officially 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 multiple types of check valves, including flanged, lug, wafer, and welded types, providing clear guidance for the quality and performance of these products.
API 602 is an international standard for valves, also developed by the American Petroleum Institute (API). This standard primarily targets steel gate valves, globe valves, and check valves with a nominal size less than or equal to DN100 (US standard size). API 602 specifies requirements for valve design, materials, dimensions, nominal pressure, structural length, manufacturing, inspection, and testing.
1. Standard Nature and Scope
API 594:
Applicable to: Specifically designed for check valves (such as swing and lift valves), suitable for industrial pipelines in the oil and gas industries to prevent backflow of media.
Core Content: Specifies the design, materials, manufacturing, and testing requirements for check valves, emphasizing sealing performance and structural integrity.
API 602:
Applicable to: Steel gate valves, globe valves, and check valves with a nominal size ≤ DN100, primarily used in the oil and gas industry.
Core Content: Covers design, materials, manufacturing, and testing requirements, emphasizing versatility and the compactness of small valves.
2. Differences in Core Content
API 594:
Design Specifications: Specifies the structural, dimensional, and material requirements for check valves.
Manufacturing Requirements: Includes the manufacturing processes and quality control for key components such as the valve body, valve cover, and valve stem.
Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.
API 602:
Design Specification: Emphasizes versatility and is 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, valve cover, and valve stem.
Inspection and Testing: Specifies the inspection and testing requirements for valves to ensure their performance and safety.
3. Applications
API 594: Applicable to check valve selection in industries such as oil and gas, such as pump outlets and compressor outlets where backflow prevention is required.
API 602: Applicable to small carbon steel valve selection in industries such as oil and gas, such as in space-constrained piping systems.
API 602 and API 594 Valve in stock
