#	Letters of Interpretation
1	12/04/2012 - 1910.119(j)(4)(iv) - Is reassembly of a cylinder valve a mechanical integrity activity?
2	02/01/2010 - 1910.119(j) - "Applicability of the PSM standard's mechanical intergrity requirements to refinery structures."
3	01/31/2008 - 1910.119(j)(1) - PSM coverage of utility systems; whether 1910.269 preempts the PSM standard for power generation facilities that serve covered processes.
4	07/12/2006 - 1910.119(j)(6)(ii) - PSM compliance for ammonia refrigeration systems.
5	07/12/2006 - 1910.119(j)(6)(i) - PSM compliance for ammonia refrigeration systems.
6	03/07/2006 - 1910.119(j)(2) - Requirement for flame-resistant clothing in petrochemical plant covered by PSM.
7	03/23/2000 - 1910.119(j) - Compliance with PSM and ANSI/ISA-S84.01 for safety instrumented systems