SIS-TECH Home

OUR SOLUTIONS

PRODUCTS

INSTALLATION, COMMISSIONING & VALIDATION
Construction Manager
Factory Acceptance Test Support
Site Acceptance Test Supervision
Operator & IPS Training

OPERATIONS & MAINTENANCE
Start-up Support
Alarm Rationalization (link under construction)
Start-up/Shutdown Procedures
Proof Test Supervision & Records

CONTINUOUS IMPROVEMENT
SIS Audits
Incident Investigations (link under construction)
SIL Verifications
Reliability Data Capture/Analysis
Mechanical Integrity Assurance

SIS-TECH Solutions was founded in July 1999, by Dr. Angela Summers to provide independent consulting services for Safety Instrumented Systems. Over the years, SIS-TECH has expanded into a full range of instrumentation and control services to cover all aspects of the Safety Lifecycle.

Each phase of the Safety Lifecycle wheel (including the Planning hub) has pop-up menus showing our services, with links offering more detail on how SIS-TECH can provide you with engineered solutions complying with both ISA 84.00.01 and ISA 91.01, as well as CCPS "Guidelines for Safe and Reliable Instrumented Protective Systems."

PSM - Process Safety Management - The corner stone to risk management in the process industries is an effective PSM program. SIS-TECH’s expertise in PSM extends beyond well designed and documented control systems. We also have extensive experience in PSM Auditing, GAP Analysis, implementing Procedures for Risk Analysis, and facilitating Risk Identification and Assessment meetings (PHA and LOPA). SIS-TECH can help your facility find the right level of protection against process hazards including safety, environmental, and production impact.

Instrumentation Reliability - The proper application of reliability engineering principles, across the lifecycle, is the key to continuous improvement in both facility safety and operating efficiency contributing to an overall competitive advantage. Reliability and continuous improvement is not just a program, it is a journey in building a culture. SIS-TECH has the industry experience to deliver and implement the reliability improvement process including procedures and training. SIS-TECH can work with the facility maintenance and operations leadership to ensure the maintenance, reliability, and operations personnel understand how to properly capture reliability data and develop action plans.

SIS-TECH Introduces Coker Drum Safety System for Crude Oil Refineries

The Coker Drum Safety System prevents unsafe actions by coker drums operators.

Houston, Texas—August 31, 2010 — The SIS-TECH Coker Drum Safety System (CDSS) automatically inhibits the opening of valves under unsafe process conditions. In a crude oil refinery, this prevents the release of hydrocarbons and/or hydrogen sulfide to the atmosphere, or introduction of hydrocarbons to an open drum. The CDSS logic solver makes sure that an in-service drum is not opened to the atmosphere, or that an open drum is not placed in service.
Read more

As seen in Chemical Processing

Automated Overfill Protection(AOPS) - A safety instrumented system (SIS) that can prevent dangerous overfill conditions in terminals, tank farms and process vessels.

The AOPS incorporates a non-programmable Logic Solver (suitable up to SIL-3) that receives signals from switches or transmitters, determines if an abnormal process condition is present, and provides outputs to close isolation valves, shut down transfer pumps, or open diversion valves. The system operates independently of the plant's process control system with the capability to communicate to the control system via hardwire, Modbus, Ethernet or wireless communications. Read more

AOPS Brochure and Datasheet

DIAMOND-SIS High Integrity Protective System (HIPS) - A low-cost, standalone logic solver certified for use in applications up to Safety Integrity Level (SIL) 3. The DIAMOND-SIS HIPS is used to provide overpressure protection for scenarios where the opening of the pressure relief valve poses unacceptable process safety risks.
Read more

HIPS Brochure and Datasheet

Automated Independent Backup (AIB) - A low-cost, standalone SIS that backs up current process control trip logic and meets the requirements of IEC 61511. The system includes an IEC 61508 logic solver that is functionally independent from the process control system, supplements existing logic, and meets all appropriate safety standards. Read more

AIB Brochure and Datasheet

SIL-Solver Revision 5.53 released - SIL Solver is an advisory software package intended for use in verifying the Safety Integrity Level ( SIL ) of SIF and other protective instrumented functions (PIF). SIL Solver uses globally recognized calculation methods defined in appropriate standards and methodologies including:

ANSI / ISA 84.00.01-2004/IEC 61511
ISA TR84.00.02
CCPS Chemical Process Quantitative Risk Analysis (CPQRA)

CCPS Guidelines for Safe and Reliable Instrumented Protective Systems

Early review in from Mr. Art Dowell--"I do like the new features, especially 'what if?'. Nice!"

	ANNOUNCEMENTS			PUBLICATIONS
	Newly Published in Chemical Processing Aug, 2010 Don't Underestimate Overfilling's Risk High level can pose serious hazards but seven simple steps can prevent them. SIS-TECH to teach Mary Kay O'Connor class. SIL Verification, May 15-16, 2012 or Nov 13-14, 2012 Layer of Protection Analysis (LOPA), April 17-18, 2012 or Oct 9-10, 2012 SIS Implementation, March 27-29, 2012 or Sept 11-13, 2012 For further information and registration details follow the links within the individual classes' PDF or contact svogtmann@sis-tech.com Summers named Centennial Fellow, Department of Chemical Engineering, The University of Alabama!			SIF Proof Testing Yields Process Sector Reliability Data Details SIS-TECH's method of collecting customer proof test results for submission to PERD. Presented by A.D. Arnold at the ISA Internation Expo, 2009, Houston, TX. Overfill Protective Systems - Complex Problem, Simple Solution Loss of level control has been a contributing cause in three of the worst industrial incidents in process industry history, but protecting against it can be surprisingly simple. Lessons Learned While Auditing Automation Systems for PSM Compliance While building systems, errors can creep in. SIS-TECH has audited many systems, and here are some of our observations illustrating these problems. Consistent Consequence Severity Estimation Most risk analysis methods rely on a qualitative judgment of consequence severity, overstatement creates excessive risk reduction requirements, understatement results in inadequate risk reduction. This paper provides justification for developing semi-quantitative look-up tables to support a LOPA team's assessment of consequence severity. Read other safety system articles published by SIS-TECH.