1 Technical Requirements - Gas and power company for ...

Main Power Transformer Protective Relaying 110. 7.12.4. Auxiliary System Relaying 110. 7.12.5. ... Stroke time for piston-operated valves shall not exceed two seconds. ... air piping shall be made of stainless steel. The joints of piping shall be welded and, for thread-type joints, sealed weld shall be applied. Demineralized water pipe shall be ... ................
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