As I have said before, I am a huge fan of Global FM’s Data Sheets, as these FREE data sheets provide EXCELLENT information for businesses who may not have the funds or the ability to use other codes. And today I got a notice that FM revised their data sheet 7-49, Emergency Venting of Vessels and this revision centers around doing maintenance when we have Installations with Intervening Stop Valves on Pressure Relief Devices (2.1.2 Design of the Emergency Overpressure Relief System). In this revision, FM does a very nice job defining what our management system should look like when we have installations with intervening stop valves on pressure relief devices…