
Specification for electrode boilers of riveted, seamless, welded and cast iron construction for water heating and steam generating
出版:British Standards Institution

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Steel water-heating boilers, steel steam boilers, cast iron water-heating boilers . Design temperatures not exceeding 650?F; water heated by resistance to passage of alternating electric current. Materials, construction, workmanship, scantlings, inspection , testing. Safety valves, electrical safety devices.
? British Standards Institution 2013
Doc 316 (1956) - Identical