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Requirements for Watertube Boilers | Midpage
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Code of Federal Regulations
Title 46
Chapter I
Subchapter F
Part 52
Subpart 52.15
Requirements for Watertube Boilers
52.15-1
General (modifies PWT-1 through PWT-15).
52.15-5
Tube connections (modifies PWT-9 and PWT-11).