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| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.119(d)(3)(ii) - PSM and Aerosol (Flammable Gas) Containers Stored in Warehouses/Distribution Centers |
| 2 | - 1910.119(d)(3) - "Applicability of the PSM standard's mechanical intergrity requirements to refinery structures." |
| 3 | - 1910.119(d)(3)(ii) - PSM compliance for ammonia refrigeration systems. |
| 4 | - 1910.119(d)(3)(i) - PSM compliance for ammonia refrigeration systems. |
| 5 | - 1910.119(d)(3)(i) - Process safety information for ventilation system design. |
| 6 | - 1910.119(d)(3)(iii) - Determination of safety for existing process equipment is required prior to start-up. |
| 7 | - 1910.119(d)(3) - Compliance with PSM and ANSI/ISA-S84.01 for safety instrumented systems |
| 8 | - 1910.119(d)(3)(iii) - Recalculating pressure vessel design; codes "no longer in use." |