Pipe connectors are assembled ensuring leakage below 50 ltr. / minute. On demand these are stamped conforming leakage rate. Cr+3 Zn plated conforming with EC directive. Fasteners as per DIN EN ISO 4759-1. Fasteners used are 8.8 grade. Customized packing available. Sleeves available in stainless steel (DIN 1.4512) for high temperature applications.