OSHA is proposing several updates to its Respiratory Protection Standard (29 CFR 1910.134) as part of a broader deregulatory effort to reduce employer compliance costs and provide greater flexibility, without compromising worker safety. Here are the key changes currently on the table:
The simple answer is yes, we can use ACGIH TLVs or NIOSH RELs to calculate the Maximum Use Concentration (MUC), but with one ABSOLUTE regulatory caveat: The resulting limit must be more protective (stricter) than what the OSHA standard dictates, or be applied to a chemical that OSHA does not currently regulate. Under 1910.134(b), OSHA
In a recent case study, NIOSH researchers purchased hundreds of respirator components from major online marketplaces to test their performance, focusing on listings bearing “NIOSH” or “P100” markings from non-authorized sellers. The results show a severe influx of fraudulent PPE:
OSHA’s regional emphasis programs continue to prioritize the programmatic elements of 1910.134. Citations in 2026 are frequently tied to “paperwork and protocol” failures rather than hardware failures:
The most significant friction point involves PHMSA and SCBA Fully Wrapped Carbon-Fiber Reinforced (CFFC) aluminum-lined cylinders on Special Permit 16320 and the use of Modal Acoustic Emission (MAE) testing to extend the life of composite cylinders. Fully Wrapped Carbon-Fiber Reinforced (CFFC) aluminum-lined cylinders have a 15-year service life. PHMSA has investigated and granted limited special
The amount of breathing air consumed during a monthly SCBA functional test (often referred to as the “monthly inspection” or “flow test”) varies slightly by manufacturer and the specific depth of your inspection/testing SOP. However, for a standard 30-minute/45-cubic-foot cylinder, you can estimate the usage based on the required NFPA 1852 checks.
A question I have asked for years, starting back in the late 1980’s when I began wearing SCBAs. I have asked this question to dozens, maybe hundreds of people, way smarter than me, and everyone was stumped. So today I had a lengthy discussion on SCBAs and the question was asked of me again. So
Shenyang Petrochemical Company “The Big Poisoning Accident“ The gas sub-device of Shenyang Paraffin Chemical Company suffered a poisoning accident during the maintenance and construction process, resulting in three (3) Deaths. The immediate causes of the accident were: When the operator carried out the blind plate swapping operation at the pump relief blind plate, the operator
The Evolution of the Hydrogen Sulfide IDLH: From Lethality to Escape Impairment The history of the Immediately Dangerous to Life or Health (IDLH) value for Hydrogen Sulfide (H2S) reflects a critical evolution in industrial safety. It highlights a shift from focusing purely on survival to understanding the physiological “tipping points” that prevent a worker from
The Immediately Dangerous to Life or Health (IDLH) history for bromine follows a trajectory similar to that of chlorine, though the data pool has historically been smaller, leading to greater reliance on comparative toxicology.
The Immediately Dangerous to Life or Health (IDLH) value for chlorine has been subject to significant reevaluation since its inception in the 1970s. The history reflects a transition from an early consensus on occupational safety to more rigorous, data-driven toxicological assessments.
The history of ammonia’s Immediately Dangerous to Life or Health (IDLH) levels is a classic example of how occupational safety standards evolve as toxicological data becomes more refined. Since the concept was first introduced in the 1970s, the ammonia limit has undergone significant downward revisions based on a better understanding of acute human tolerance.
