Meeting the rigorous safety requirements of the American Petroleum Institute. Key Components of API 528 Nameplate Nomenclature
| Standard | Focus Area | Key Difference | | :--- | :--- | :--- | | | Surface Safety Valves (SSVs) | Above-ground, fail-safe close, wellhead service | | API 6A | Wellhead & Christmas Tree Equipment | Broad standard for flanges, hangers, and valves (includes SSVs but less detail) | | API 14D | Subsurface Safety Valves (SCSSVs) | Downhole application, requires wireline retrieval | | API 6D | Pipeline Valves | For transmission pipelines, not wellhead shut-in service | | ISO 10423 | International equivalent to API 6A | Covers similar scope but with metric units | api 528 pdf
: Sizing, Selection, and Installation of Pressure-Relieving Devices (the primary guide for system design). Accessing the Document Meeting the rigorous safety requirements of the American