API 6D and API 608 are both widely used standards for ball valves, but they are designed for different applications.
Feature | API 6D Ball Valve | API 608 Ball Valve |
Standard | Pipeline and Piping Valves | Metal Ball Valves |
Main Application | Oil & gas pipelines, terminals, pipeline stations | Refineries, chemical plants, power and industrial piping |
Typical Service | Pipeline isolation and transmission | Process piping and equipment isolation |
Bore | Usually full bore; suitable for pigging when specified | Full or reduced bore |
End Connections | Flanged, butt-weld, etc. | Flanged, threaded, welded |
Testing | API 6D-specific testing requirements | Typically tested in accordance with API 598 |
DBB / DIB | Pipeline isolation requirements are specifically addressed | Not the primary focus |
Actuation | Manual, gearbox or actuated | Manual, gearbox, pneumatic or electric |
Typical Application | Pipeline systems | Process plants and industrial piping |
API 6D is primarily intended for pipeline and transmission systems, where full-bore passage, pigging, isolation and pipeline-specific requirements can be important.
API 608 is primarily intended for metal ball valves used in process and industrial piping systems.
Pipeline / transmission system → API 6D
Process plant / industrial piping → API 608
An API 608 valve should not automatically be substituted for an API 6D valve when a project specification specifically requires API 6D compliance.
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Xian Hengfeng Electromechanical Equipment Co.,Ltd
No.15,group 3,Sanlian Village,Dazhao Street Office,Chang’an District,Xi’an City, Shaanxi Province
Yiwu Hengfeng Electromechanical Equipment Company
Zongtang 1st District, Jiangdong Street, Yiwu City, Jinhua City, Zhejiang Province
