Chemical Process Safety (PSM/RMP)

Pursuant to the risk management program regulations, facilities must perform an offsite consequence analysis for the worst-case release scenario. Do the quantities of two separate vessels that are interconnected with a closed valve need to be aggregated for the worst-case release scenario analysis? … Membership Required You must be a member to access this content.View Membership...

For the purpose of analyzing the worst-case release scenario required as part of the hazard assessment at 40 CFR Part 68, Subpart B, the worst-case release quantity is identified as the greatest amount held in a single vessel or pipe, taking into account administrative controls that limit the maximum quantity (40 CFR §68.25(b)). Are mechanical…...

In section 2, element 2.5, of an RMP, facilities must report the quantity of toxic chemical that the facility used for the worst-case analysis. When reporting this data element in RMP*eSubmit for a mixture, should facilities report the entire weight of the toxic mixture potentially being released or only the amount of the regulated toxic…...

Both of these tools are necessary in the process safety arena; however, they have very different and distinct roles in process safety management.  In my career I found it best to perform the PHA first and based on the deviations identified in the PHA, we would write our SOPs to cover those deviations.  And of…...

We have had many discussions on SAFTENG regarding pressure vessel safety, but it is the Year 2020 and we need to have a very direct talk about how we manage flammable liquids and combustible materials around our pressure vessels.  In this article, I am primarily speaking to those in the Anhydrous Ammonia fertilizer industry and…...

If you are an NH3 distributor and you’re using the Nitrogen Stabilizers some things have changed that you need to be aware of.  First and foremost, see my posting with the Safety Alert from Transport Canada regarding the issues they have found regarding storage and transport tanks and these Nitrogen stabilizers.  I have not heard…...

In 2017 and 2019 I wrote about these Nitrogen Stabilizers and how their introduction into a PSM/RMP covered process would require a MOC and PSSR and I broke down the potential concerns and questions regarding these additives.  Now it seems there may be a Mechanical Integrity twist to the use of these additives, as Transport…...