Product Specification
Function: Provides primary isolation (Block 1), secondary isolation (Block 2), and a vent/drain (Bleed) to safely release trapped fluid, enhancing safety during maintenance.
Size: 36-inch nominal pipe size (NPS), a very large scale for major pipelines.
Pressure Ratings: Available for various ASME classes, like Class 150, 900, 1500, up to 2500, depending on application.
Materials: Common materials include Carbon Steel (A216 WCB) and Stainless Steel (SS316), with options for sour gas service (NACE MR0175/ISO 15156).
Design: Often a single-piece body (forged or cast) for compactness, using ball valves with an integrated needle/globe valve for bleeding.
Operation: Can be manual (gear/wrench), electric, or hydraulic actuators for large sizes.
Certifications: Conforms to API 6D, API 6FA, EEMUA 182, ISO standards, and fire-tested (API 607/API 6FA
