Texas and Ammonia Refrigeration PSM Training at its best! ARTS just wrapped up a PSM/RMP training focused on ammonia refrigeration! This group is dedicated to the mission of sustaining ammonia as the safest refrigerant known to man. Thank you for allowing us to be a small part of your training and compliance needs. Will be back in Dallas / Fort Worth, Texas in later fall of 2023. See our current schedule at this link.