“Leak Testing” ammonia refrigeration system fatality

Employee #1 was working for a firm that, as a subcontractor, performed maintenance on commercial food service equipment. He was in the kitchen area of a single-story restaurant, attempting to locate the source of a refrigerant leak in an ice cream storage dipping cabinet. Employee #1 connected a cylinder containing pressurized nitrogen to the dipping cabinet’s refrigeration system via a hose without using a pressure-reducing device, such as a pressure regulator or pressure relief valve.

The cylinder’s internal pressure of approximately 2,200 psig was considerably more than the dipping cabinet’s maximum test pressure of approximately 150 psig.

This disparity overpressurized the dipping cabinet’s refrigeration system and caused it to explode.

The upper part of the compressor broke off and struck Employee #1 in the head, killing him.

Violation Summary
Violations/Penalties Serious Willful Repeat Other Unclass Total
Initial Violations 2     2   4
Current Violations 2     2   4
Initial Penalty $2,100 $0 $0 $0 $0 $2,100
Current Penalty $1,365 $0 $0 $0 $0 $1,365

 

Violation Items
# Citation ID Citaton Type Standard Issuance Date Abatement Due Date Current Penalty Initial Penalty Contest Latest Event
1. 01001 Serious 19100101 B 06/04/2007 06/17/2007 $683 $1,500   I – Informal Settlement
2. 01002A Serious 19101200 E01 06/04/2007 06/17/2007 $682 $600   I – Informal Settlement
3. 01002B Serious 19101200 G01 06/04/2007 06/17/2007 $0 $0   I – Informal Settlement
4. 01002C Serious 19101200 H01 06/04/2007 06/17/2007 $0 $0   I – Informal Settlement
5. 02001 Other 19100132 D02 06/04/2007 06/17/2007 $0 $0   I – Informal Settlement
6. 02002 Other 19100132 F01 I 06/04/2007 06/17/2007 $0 $0   I – Informal Settlement

 

Source: https://www.osha.gov/ords/imis/establishment.inspection_detail?id=310715214

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