AS 4617:2018 pdf free.Manually operated gas valves. 2.1 MATERIALS 2.1.1 Continuity of satisfactory operation Materials used in the construction shall he such that continuity of safe and satisfactory operation can he expected during normal usage within the manufacturer’s specification. 2.1.2 Suitability of materials for conditions of use Materials and finishes, including dressings and lubricants, used in the construction, shall be...
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