What is the difference between API 6D and 602?
API 602 specifies technical requirements for compact gate valves, primarily suitable for high-pressure, high-temperature applications in the oil and chemical industries. These valves feature forged bodies, making them 30% lighter than cast valves, particularly ideal for space-constrained pipeline installations. Their sealing surfaces are typically overlaid with hard alloy, maintaining excellent sealing performance even under frequent opening and closing conditions.
API 6D valves, a core standard in the oil and gas industry, cover numerous valve types, such as gate valves, ball valves, check valves, and plug valves. These valves play an indispensable role in production, transportation, and processing. API 6D valve design emphasizes quality and reliability. For example, the design of different valve types follows multiple standards to ensure efficiency and safety. Its design philosophy focuses on quality and reliability, striving for low torque, excellent sealing, low noise, and high safety and stability.
1. Standard Nature and Scope
API 6D: Full name Pipeline Valves, it is the core standard for pipeline valves in the oil and gas industry, covering various types such as ball valves, gate valves, check valves, and plug valves, and specifying detailed design, manufacturing, inspection, and testing requirements.
API 602: Full name Compact Carbon Steel Gate Valves, it is a specification specifically for small carbon steel gate valves, applicable to small carbon steel gate valves with flanged or welded connections.
2. Core Content Differences
API 6D:
Design Specifications: Emphasizes low torque, excellent sealing, low noise, and high safety and stability.
Manufacturing Requirements: Includes 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 valve performance and safety.
API 602:
Design Specifications: For small carbon steel gate valves, it specifies their structure, dimensions, and pressure-temperature ratings.
Manufacturing Requirements: Includes 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.
3. Applications
API 6D: Primarily used in long-distance pipeline systems, it is the core standard for valves in long-distance pipelines for oil and natural gas.
API 602: Applicable to industries with stringent valve quality requirements, such as oil, natural gas, and chemicals, ensuring valve reliability under extreme conditions such as high pressure and corrosion.
API 6D Valve and API 602 Valve in stock
