Safety Instrumentation Systems

Safety instrumentation systems can help companies achieve risk reduction and incident prevention. A safety instrumented system (SIS) takes automated action to keep a plant in a safe state, or to put it into a safe state, when abnormal conditions are present. The SIS may implement a single function or multiple functions to protect against various process hazards in your plant.

Confirming the SIS Layer of Protection

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 2, 2019
The Safety Instrumented System (SIS) is a complex protection layer with high reliability requirements. Assuring the effectiveness of the SIS requires...

Functional Safety Practices for Operations & Maintenance

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 25, 2018
Operation and maintenance teams bear a heavy responsibility to assure that the Safety Instrumented System (SIS) integrity and reliability is...

A Hierarchical Bayesian Approach to IEC 61511 Prior Use

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 24, 2018
Understanding the quality of failure rate data is vital to successful application of SIS, as emphasized in the latest IEC 61511 standard. This...

Pump BLEVE Protection Initiator Determination

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 24, 2018
If a liquid-filled centrifugal pump is run while isolated, the mechanical energy input to the contained fluid results in a temperature increase. This...

Choosing HIPS over PRV - It's More Than Risk Reduction

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 24, 2018
The use of the term “High Integrity Protective System” or HIPS has changed from 2000 when this author won the...

Safety Instrumented Systems Design & Lifecycle Fundamentals

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 29, 2017
It has been identified that 44% of recorded accidents involving control systems were due to specification issues. This review will emphasize the...

Modular Software Product Line Approach for Automation

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 29, 2017
This paper examines the advantages of utilizing a Software Product Line type of approach with modular code structures to process automation...

Inherently Safer Automation

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 29, 2017
The 2 nd edition of CCPS’s Guidelines for Safe Automation of Chemical Processes discusses the application of the inherently safer...

Are Your Safeguards Fast Enough to Be Effective?

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 29, 2017
A number of design pitfalls must be avoided when allocating the process safety time during the specification of instrumented safeguards. A key...

Safer and Smarter Sulfiding of Hydrotreating Catalysts

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 12, 2016
Catalyst sulfiding (aka "presulfiding") is a critical step to ensure that hydrotreating catalysts perform as designed after startup. In order to...

One Company's Observations on the Implementation of LOPA

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
April 11, 2016
Layer of Protection Analysis (LOPA) is gaining popularity as a risk assessment tool, but often unexpected difficulties are encountered when rolling...

Auditing IPLs -- Using Safety Critical Functions Manuals

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
March 31, 2014
The three criteria for an independent layer of protection (IPL) are effectiveness, independence, and auditability. The effectiveness and independence...

Sound Alarm Management Improves Safety and Profitability

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
May 1, 2013
At the core of ethylene manufacturing, plant operators play a critical role in maintaining safe, sustainable and profitable production. For nearly...
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