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Requirements for Firetube Boilers | Midpage
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Code of Federal Regulations
Title 46
Chapter I
Subchapter F
Part 52
Subpart 52.20
Requirements for Firetube Boilers
52.20-1
General (modifies PFT-1 through PFT-49).
52.20-17
Opening between boiler and safety valve (modifies PFT-44).
52.20-25
Setting (modifies PFT-46).