Process Safety Information (PSI) OSHA PSM 1910.119(d)
Chemistry, technology and equipment information kept current and accessible
Process Safety Information (PSI)
OSHA PSM 1910.119(d)
OSHA PSM 1910.119(d) is the foundational documentation element, the compilation of written process safety information that the employer has to complete before conducting any PHA. PSI breaks into three categories. The first is (d)(1) chemical hazard information covering toxicity, PELs, physical data, reactivity and corrosivity. The second is (d)(2) technology information covering the block flow diagram, the process chemistry, the maximum intended inventory, the safe operating limits and the consequence of deviation. The third is (d)(3) equipment information covering materials of construction, P and IDs, electrical classification, relief device sizing and design codes. The failure mode of this element is gradual erosion. Modifications happen, MOC documentation lags, the P and IDs drift away from reality, and the PSI register turns into a historical record rather than a working document. Every CSB major incident report carries PSI findings, and our team keeps the register live so that yours does not.
How the study is executed
A structured, facilitated process that runs from scope definition through close out and produces defensible, actionable outputs.
Catalogue required PSI per (d)(1) / (d)(2) / (d)(3), identify gaps, version control issues, accessibility constraints.
Per (d)(1), compile SDS, GHS classification, toxicity data, physical properties, reactivity per CHETAH / Bretherick.
Per (d)(2), assemble BFD, process chemistry, maximum intended inventory, safe upper / lower limits, consequence of deviation.
Per (d)(3), compile MOC, P&IDs, electrical classification, relief device sizing per API 520/521, ventilation, design codes.
Specify MOC trigger for PSI update, enforce update before MOC closure, track PSI currency as leading indicator.
Ensure operating teams can access PSI relevant to their unit, integrate with EDMS and shift handover.
What the study covers in full
Outcomes of Process Safety Information (PSI) OSHA PSM 1910.119(d)
- We let your operators decide on current data
- We ground PHA quality in an accurate baseline
- We make sure relief sizing matches the operating envelope
- We make sure the HAC drawings match the installed equipment
- We give you a confident response on OSHA 1910.119(d)
- We produce CCPS RBPS Element 6 evidence
- We satisfy the MSIHC Schedule 1 chemical information requirement
- We satisfy ISO 45001 Cl.7.5 documented information
- We speed the MOC cycle through current PSI
- We lift PHA quality
- We sharpen troubleshooting
- We hold contractor access discipline
- We help you avoid a regulatory citation
- We reduce incident cost
- We lift engineering productivity
- We strengthen your insurance position
Codes & standards we work to
Triggers that signal the need
Where Process Safety Information (PSI) OSHA PSM 1910.119(d) applies
Wellheads, separators, gas compression, FPSO topsides, produced water systems.
Distillation columns, reactors, heat exchangers, storage spheres, LPG handling.
Cryogenic exchangers, liquefaction trains, BOG compressors, storage and sendout.
Reactive systems, batch reactors, solvent handling, runaway reaction scenarios.
Boilers, HRSGs, steam headers, hydrogen systems, ammonia SCR units.
Sterile vessels, CIP/SIP, pressure fermenters, solvent recovery, spray dryers.
Tangible deliverables
- A chemical hazard information dossier per (d)(1)
- A technology information pack per (d)(2)
- An equipment information register per (d)(3)
- A walked down P and ID and PFD set
- Relief device sizing calculations
- A PSI update procedure with an MOC trigger
Ready to start your project?
Speak with our team to scope an engagement tailored to your facility, regulatory context, and lifecycle stage.