Best available scan. Addenda included.
ASME BPVC-IV-1977 history
ASME BPVC-IV-1977
1977 ASME Boiler and Pressure Vessel Code, Section IV: Heating Boilers
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More ASME standard pdf
ASME B94.53-1978 (R1984)
Solid Steel Rectangular MetalCutting Squaring Shear Knives-Dimensional Tolerances
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