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TITLE 46 - SHIPPING
CHAPTER I - COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
SUBCHAPTER F - MARINE ENGINEERING
PART 52 - POWER BOILERS
52.01 - 100 - Openings and compensation (modifies PG32 through PG39, PG42 through PG55).
(a) The rules for openings and compensation shall be as indicated in PG32 through PG55 of the ASME Code except as noted otherwise in this section.
(b) (Modifies PG39.) Pipe and nozzle necks shall be attached to vessel walls as indicated in PG39 except that threaded connections shall not be used under any of the following conditions: (1) Pressures greater than 4137 kPa (600 psig); (2) Nominal diameters greater than 51mm (2 in.); or (3) Nominal diameters greater than 19mm (0.75 in.) and pressures above 1034 kPa (150 psig).
(c) (Modifies PG42.) Butt welding flanges and fittings must be used when full radiography is required by 56.9510.
[CGD 8179, 50 FR 9432, Mar. 8, 1985]
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