Standards and Testing Compliance Every Double Block and Bleed Valve Manufacturer Must Meet Standards compliance is what separates credible double block and bleed valve manufacturers from suppliers offering look-alike products. Because a DBB valve is frequently the sole barrier between a live process and a work crew performing hot work, confined space entry, or equipment isolation, procurement and engineering teams need a working understanding of the standards landscape before evaluating any manufacturer's claims.https://justpaste.it/double-block-and-bleed-valve