Despite the mention of "valves" in the title, this standard is widely known in the industrial gas industry as the benchmark for safely depopulating and dismantling gas cylinder manifolds and bundles. It provides strictly defined operational procedures to prevent accidents—specifically, the uncontrolled release of residual pressure or flammable gases.
If your budget is limited, check if your industry's trade association (e.g., the Compressed Gas Association - CGA) has a guidance document that references ISO 25760. However, for legal defense or official certification, you purchase the official ISO PDF. iso 25760 pdf
What is ISO 25760?