Gas cylinders. 17E and 25E taper threads for connection of valves to gas cylinders - Specifications Ingestion-build-86103 This is especially the case

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2   Normative references

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Gas cylinders. 17E and 25E taper threads for connection of valves to gas cylinders - Specifications Ingestion-build-86103 This is especially the case1 Scope This document specifies dimensions and tolerances for taper screw threads of nominal diameter 17,4 mm (designated as 17E) and 25,8 mm (designated as 25E) used for the connection of valves to gas cylinders. It does not cover the connection requirements for mechanical strength, gas tightness, and capability of repeated assembly and dismounting operations. Gauge inspection is covered by ISO 113632.