[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: 46CFR54.01-15]

[Page 144]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 54_PRESSURE VESSELS--Table of Contents
 
                   Subpart 54.01_General Requirements
 
Sec. 54.01-15  Exemptions from shop inspection and plan approval (replaces 
U-1(c) (6) through (9)).

    (a) The following classifications are exempt from shop inspection 
and plan approval requirements of this part:
    (1) Vessels containing water at a pressure not greater than 100 
pounds per square inch gage, nor a temperature above 200 [deg]F., 
including those containing air, the compression of which serves only as 
a cushion. Air charging lines may be permanently attached provided the 
air pressure does not exceed 15 pounds per square inch gage.
    (2) Hot water supply storage tanks heated by steam or any other 
indirect means when none of the following limitations is exceeded:
    (i) A heat input of 200,000 B.t.u. per hour;
    (ii) A water temperature of 200 [deg]F.;
    (iii) A nominal water-containing capacity of 120 gallons; or
    (iv) A pressure of 100 pounds per square inch gage.

The exemption of any tank under this subparagraph requires that it shall 
be fitted with a safety relief valve of at least 1-inch diameter, set to 
relieve below the maximum allowable working pressure of the tank.
    (3)(i) Vessels having an internal operating pressure not exceeding 
15 pounds per square inch gage with no limitation on size. (See UG-28(e) 
of the ASME Code.)
    (ii) Cargo tanks of pressure vessel configuration are not included 
in the exemption in paragraph (a)(3)(i) of this section.
    (4) Class I, II, and III pressure vessels that meet the requirements 
of Sec. 54.01-5 (c)(3) and (c)(4).
    (5) Condensers and heat exchangers, regardless of size, where the 
design is such that the liquid phase is not greater than 100 pounds per 
square inch gage and 200 [deg]F. and the vapor phase is not greater than 
15 pounds per square inch gage provided system over pressure conditions 
are considered.
    (b) For fluid conditioner fittings see Sec. 56.15-1 of this 
subchapter.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970; CGFR 70-143, 35 FR 19906, Dec. 30, 1970; CGD 77-
147, 47 FR 21810, May 20, 1982]