Yes, but not exclusively. It covers conventional, balanced bellows, pilot-operated, and power-actuated relief valves. It also covers rupture disks, either alone or in combination with a relief valve.
Beyond legal fines (up to $150,000 per violation under the Digital Millennium Copyright Act), a bootleg PDF can physically hurt your team. iso 23251 pdf
Real-world case: An E&I technician used a copied ISO 23251 PDF from 2006 to size a flare header. The older edition lacked updated friction loss corrections. Result? Under-sized piping, backpressure on a relief valve, and a near-miss overpressure event. Yes , but not exclusively
Audit trail: During a PSM audit, the engineer could not produce a purchase receipt for the standard. The regulator ruled the design "non-conforming to the latest recognized and generally accepted good engineering practices (RAGAGEP)." The facility faced a $90,000 fine. ISO 23251 is the definitive global benchmark for
Always use the official PDF with your company’s purchase record.
ISO 23251 is the definitive global benchmark for the design and sizing of pressure relief systems in the oil and gas sector. If you are an engineer working on frontend design (FEED), detailed engineering, or safety studies (HAZOP/SIL), this document is essential. However, be aware that it is a highly technical, calculation-heavy document intended for professionals, not a casual guide.