[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR52.01-100]

[Page 128-129]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 52_POWER BOILERS--Table of Contents
 
                   Subpart 52.01_General Requirements
 
Sec. 52.01-100  Openings and compensation (modifies PG-32 through PG-39, 
PG-42 through PG-55).

    (a) The rules for openings and compensation shall be as indicated in 
PG-32 through PG-55 of the ASME Code except as noted otherwise in this 
section.
    (b) (Modifies PG-39.) Pipe and nozzle necks shall be attached to 
vessel walls as indicated in PG-39 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).

[[Page 129]]

    (c) (Modifies PG-42). Butt welding flanges and fittings must be used 
when full radiography is required by Sec. 56.95-10.

[CGD 81-79, 50 FR 9432, Mar. 8, 1985]