Views: 0 Author: J-VALVES Publish Time: 2024-04-27 Origin: Site
I. API 600 Gate Valve Standard
API 600 is a standard for steel gate valves with flanged ends and butt-weld ends and bolted bonnets used in the oil and gas industry. This standard applies to gate valves with a nominal size (DN) > DN50 (NPS2), covering the design, manufacture, inspection, and testing requirements of gate valves.
Scope of Application: Suitable for scenarios such as refineries and oil and gas transmission pipelines.
Structural Design: Usually with a bolted bonnet, having good sealing performance and high strength.
Material Requirements: The valve body and main components are usually made of carbon steel or alloy steel, capable of withstanding high-pressure and high-temperature environments.
Testing Requirements: Include shell testing, seat testing, and backseat testing to ensure the tightness and structural integrity of the valve at the rated pressure.
II. API 6D Gate Valve Standard
API6D is a standard for pipeline valves used in the oil and gas industry, covering various valve types such as gate valves, ball valves, plug valves, and check valves. This standard is particularly applicable to long-distance pipelines and high-pressure operating conditions.
Main Features
Scope of Application: Mainly used in oil and gas long-distance pipeline systems, including subsea pipelines.
Structural Design: Usually welded or flanged connections, with bi-directional sealing function, capable of withstanding high pressure and highly corrosive environments.
Material Requirements: In addition to metallic materials, it may also include non-metallic materials (such as metal-non-metal composite valve seats in fire-resistant designs) to meet fire-safety requirements.
Testing Requirements: Besides the conventional shell tests and valve seat tests, the valve cavity is required to have an automatic pressure-relief function to prevent over pressure in the valve cavity.
