Welcome to the Mangan Software blog page. Here you will find lots of useful articles regarding functional safety, process safety and news and events here at Mangan. Please feel free to have a browse around and don’t forget to sign up to the Newsletter to receive updates when a new blog post is added. If there is a blog post you would like to see then please feel free to get in contact and we will aim to add it to the Mangan Software blog page.
Bring Back the Basics – Practical Field Instrumentation in Process Safety Service (Blog Series: Part 1)
The selection of field instrumentation in Process Safety Service can make or break the performance of safety instrumented functions. Poor selection and design can result in unreliable and costly failures and unscheduled shutdowns. In some processes, an unscheduled shutdown can cost millions of dollars as well as expose operating personnel and the community to hazards associated with equipment failure or...
Process Safety Data for Pressure Relief Systems
Process Safety Data for Pressure Relief Systems
Pressure Relief Systems have been around a long time, but the documentation of their Process Safety Data has a pretty tortured past. Due to the relatively long history, dating back to the early boilers in locomotives and steamboats, there are lots of regulations that grew a bit haphazardly in response to early incidents.
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How Accurate Are Safety Calculations
How accurate are safety calculations: If you have ever sat in a LOPA, inevitably there is someone that questions the accuracy of one factor or another. Usually they are trying to justify making an initiating cause less frequent or take more credit for an Independent Protection Layer (IPL).
As unsatisfying as it is, assessment of Process Safety Systems...
Assessing SIF and IPL Performance using SLM
Assessing SIF and IPL Performance using SLM 84.01.00 and IEC 61511 Part 1, require that the performance of Safety Functions be assessed at regular intervals. The Operate-Maintain Module in Mangan Software Services’ SLM application can provide the user with real time performance data through availability and Probability of Failure on Demand (PFD) calculations performed on a daily basis. This eliminates...
How to Manage Bypasses Using SLM
IEC 61511 Part 1, contains extensive discussions of the design and operating procedures for SIF bypasses. Clause 16.2 describes operational requirements such as:
- Performing a hazard analysis prior to initiating a bypass
- Having operational procedures in place for when a protective function has been bypassed ...
I Like Logic Diagrams
I like logic diagrams, although I’m often in the minority, to do the detailed design of a Safety Instrumented Function (SIF). Others believe that Cause and Effect (C&E) Diagrams are all that is needed. My view is that C&E’s are an effective overview tool when it comes to familiarizing people that aren’t part of the design team with a SIF’s...