Standard
![API 6D VS API 608.jpg](https://c44.hongcdn.com/uploads/2311/api-6d-vs-api-608-!j.webp)
API 6D VS API 608
API 6D and API 608 are standards specifications for ball valves; their scope, application, and inspection are different....
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Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)