Recent Blog Posts

PSI Explained: Ventilation System Design

June 27th, 2017

Similar to the Relief System Design and Design Basis, Title 8 CCR §5189(d)(3)(A)(5) and Title 29 CFR §1910.119(d)(3)(i)(E) require that the owner of a PSM chemical process prepare documentation describing the design of the ventilation systems associated with the process. With regard to ammonia refrigeration machinery room ventilation, we have written about the current ventilation system […]

PSI Explained: Electrical Classification

May 29th, 2017

Flammable, combustible, and toxic chemicals often require special electrical considerations to prevent accidental ignition caused by motors, wiring, and other equipment. Title 8 CCR §5189(d)(3)(A)(3.) and Title 29 CFR §1910.119(d)(3)(i)(C) require that the information pertaining to the equipment in the process include Electrical Classification. Electrical classification documentation may include: A written statement describing the applicable […]

Machinery Room Ventilation Requirements

August 9th, 2016

In this week’s blog post we will summarize the machinery room ventilation requirements contained within ANSI/IIAR 2-2014. We have broken down the ventilation requirements into three (3) categories: Design and Installation Control Testing Some of the requirements overlap and are listed in more than one of the categories. Design and Installation When occupied, the machinery […]

Ammonia Week in Review | June 26, 2015

June 26th, 2015

Ammonia is falsely accused in this week’s edition of the Ammonia Week in Review….. No Chemical Leak Found After 37 Selah Plant Employees Sent to Hospital – An employee leaving the plant Tuesday morning said there had been an ammonia leak. But Martinez said there was no ammonia in the building where cherries were being packed. Ammonia is commonly […]

Ventilation System Dampers

June 23rd, 2015

I recently interacted with IIAR (International Institute of Ammonia Refrigeration) on the issue of ventilation system dampers. My original question, along with the response from IIAR is included below: Question: ANSI/IIAR 2 Addendum B § requires that “If motorized dampers are utilized they shall be of the power to close and spring to open type.” […]