Safety Info Posts

What does “relief system design basis” mean?

Relief systems include, but are not limited to, relief valves, relief headers, relief drums, and rupture disks. Design basis means documenting how the loads and sizes of the relief system and inlet and outlet sizes were determined. This includes:… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log...

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Understanding the ABC Model

The core element of behavior modification is the ABC model of behavior: Antecedents                              Behavior                            Consequences The ABC model specifies that behavior is triggered by a set of Antecedents (something that precedes behavior and is causally linked to the behavior) and followed by Consequences (outcome of the behavior for the individual) that increase…...

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Albert City, Iowa Chicken Farm BLEVE (NFPA)

On April 9, 1998, two volunteer firefighters died in Albert City, Iowa, and six responders were injured when a burning LP-Gas tank exploded in a boiling liquid expanded vapor explosion (BLEVE).  CLICK HERE for this NFPA Article on the incident…. Membership Required You must be a member to access this content.View Membership LevelsAlready a member?...

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Response to an NH3 leak leads to serious exposures and missed shifts

At approximately 9:30 p.m. on or about July 31, Employee #1, a can and bottling operation maintenance technician, responded to a possible ammonia leak during the second shift at the plant. A 2,000-lb outside storage tank pumped ammonia into the line-filled room to cool the syrups to between 35 and 40 degrees F before the…...

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Cellular Phones and Other Risks in Classified Areas (Bureau of Ocean Energy Management)

This National Safety Alert provides an update to National Safety Alert No. 5, Cell Phone Results in Fire, dated March 6, 2002, which addressed a flash fire on a platform in the Gulf of Mexico OCS. As detailed in National Safety Alert No. 5, a contract panel specialist worked on an open platform master control…...

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BLEVE Response and Prevention (Dr. A. M. Birk Department of Mechanical Engineering Queen’s University)

Technical documentation prepared for: Transport Canada Canadian Association of Fire Chiefs Propane Gas Association of Canada Inc. This document is intended to go with the video of the same title, and will provide the viewer with additional technical information to support the content of the video.  It is recommended that the video be viewed first,…...

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A look back at the first NFPA 51B committee meeting (Philidelphia, PA. May 21-25, 1962)

Cutting and welding processes using electric arcs or oxy-fuel gas flames are necessary for our industrial world. Too often, however, the persons who use, hire, or supervise the use of the processes do not fully appreciate that their improper use can result in the loss of life and property by fire and explosion. Approximately 6…...

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The Components of a “Safety Culture” (Reason, 1997)

The main elements of a safety culture and their various interactions are previewed below. Each subcomponent will be discussed more fully below:… Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here...

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Leading Indicators explained in the idea that safety is a PROCESS/SMS

I have mentioned the former plant managers that I was so privileged to have had to opportunity to work for these pioneers in safety.  These were Chemical Engineers, but they were safety geniuses before their time.  In 1996, I went to work for Dale Fannin, and I had no idea what I was in for. …...

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The BASICS on PRESSURE VESSEL SAFETY (OSHA)

INTRODUCTION Recent inspection programs for metallic pressure containment vessels and tanks have revealed cracking and damage in a considerable number of the vessels inspected. Safety and hazard evaluations of pressure vessels, as also presented in OSHA Instruction PUB 8-1.5, need to consider the consequences of a leakage or a rupture failure of a vessel.  Two…...

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