MAR-APR 2019

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INTECH MARCH/APRIL 2019 41 A n appeal panel formed by Un- derwriters Laboratories (UL) has ruled in favor of an ISA appeal against a UL cybersecurity standard. ISA's appeal was brought against UL 2900-2-2, Standard for Software Cybersecurity for Network-Connectable Devices, Part 2-2: Particular Requirements for Industrial Con- trol Systems, for which UL was seeking ap- proval as an American National Standard. ISA's successful appeal means the UL stan- dard will not gain that status at this time. ISA's appeal was driven by an underly- ing principle of standards development— to avoid burdening users with overlap- ping and duplicating standards from different standards developers. Based on reviews by cybersecurity experts, ISA was concerned about UL overlap with the ISA/ IEC 62443 series of standards, which are developed by the ISA99 standards com- mittee as American National Standards with simultaneous review and adoption by the Geneva-based International Elec- trotechnical Commission (IEC). ISA99 draws on the input of cybersecurity ex perts from across the globe in develop- ing the widely used standards, which are applicable to all industry sectors and criti- cal infrastructure. ISA's successful appeal asserted that UL failed to follow a key clause in the UL accredited standards procedures that is intended to prevent duplication and overlap. Prior to the appeal, UL had ac - knowledged that it missed earlier oppor- tunities to identify potential overlap and duplication. Without approval as an American Na- tional Standard, the UL standard will not be eligible to become an internationally recognized standard through the IEC. IEC leaders from TC65, the primary IEC com- mittee working with ISA99, had previous- ly indicated that the UL standard would have a very low chance of achieving that status in any event. The ISA/IEC 62443 series is cited throughout the U.S. NIST Cybersecurity Framework. In late 2018, the United Na- tions Economic Commission for Europe confirmed it will integrate the ISA/IEC 62443 series in its Common Regulatory Framework on Cybersecurity, which will serve as an official UN policy position statement for Europe. For information on the ISA/IEC 62443 standards and related training and learn- ing resources, contact Eliana Brazda, ISA Standards, n UL panel upholds ISA appeal of UL cybersecurity standard New Benchmarks & Metrics | standards The ISA76 standards committee, Com- position Analyzers, has undertaken a first step in the process of creating a possible new standard or modifying an existing industry standard for the safe design of sample probes. The com- mittee is investigating the mechanical design of sample probes and injec- tion quills in response to concerns by industry users about a possible gap in current best practices. Several industry standards are currently used, including ASME PTC 19.3, Thermowells, and IEC/ TR 61831, On-line Analyzer Systems – Guide to Design and Installation. How- ever, current practices either specifically exclude sample probes or do not reflect the most recent practices and industry knowledge. As a first step in the process of creat- ing a new standard or proposing changes to an existing standard, ISA76 is seeking input from the wider industry, includ- ing manufacturers, EPCs, and end user companies. ASME PTC 19.3 is believed to be the most comprehensive standard in terms of understanding the static and dy namic stresses on a probe (with the current restriction that the thermowell standard specifically eliminates probes from its applicability). ISA76 is seeking to determine if any users have designed a sample probe ac cording to ASME PTC 19.3 2010 and/ or 2016 and have experienced probe failure due to static or dynamic loads. It is expected that this information will enable ISA76 to understand the extent that the nuances between a probe and a thermowell impact the overall structural performance on a practical level. At this time, ISA76 is asking users to indicate, anonymously if desired: 1. Do you design, or have you ever de- signed, a sample probe according to ASME PTC 19.3? 2. Have you ever had a mechanical fail- ure of the probe designed to ASME PTC19.3 (which could not be disre- garded due to an engineering error such as material choice or corrosion)? If your answer to the second question is yes, would you allow ISA76 leaders to follow up to understand the applica- tion and failure? Any additional information on quanti- ties, current company design practices, and other related information and any questions that could be considered by ISA76 will also be greatly appreciated. Please send your responses to Charley Robinson, ISA Standards, crobinson@isa. org, with the subject line "Sample Probe Survey," and indicate clearly if (a) you would like to remain anonymous, and (b) if ISA76 leaders may follow up with you to better understand your experience. n ISA76 seeks user input on sample probe design

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