[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: 46CFR54.10-20]

[Page 155-156]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 54_PRESSURE VESSELS--Table of Contents
 
             Subpart 54.10_Inspection, Reports, and Stamping
 
Sec. 54.10-20  Marking and stamping.

    (a) Pressure vessels (replaces UG-116, except paragraph (k), and UG-
118). Pressure vessels that are required by Sec. 54.10-3 to be stamped 
with the Coast Guard Symbol must also be stamped with the following 
information:
    (1) Manufacturer's name and serial number.
    (2) Coast Guard number, see Sec. 50.10-30 of this subchapter.
    (3) Coast Guard Symbol, which is affixed only by the marine 
inspector.
    (4) Maximum allowable working pressure -- kPa (-- psig) at -- [deg]C 
(---- [deg]F).
    (5) Class.
    (6) Minimum service temperature allowed, if below -18 [deg]C (0 
[deg]F)
    (7) Water capacity in liters (U.S. gallons), if a cargo carrying 
pressure vessel.
    (b) Multichambered pressure vessels (replaces UG-116(k)). In cases 
where more than one pressure vessel is involved in an integral 
construction, as with a heat exchanger, the manufacturer may elect to 
class the component pressure vessels differently. In such cases he shall 
stamp the combined structures as required in paragraph (a) of this 
section with information for each pressure vessel. Where an item for 
stamping is identical for both vessels, as with name and address of 
manufacturer, it need not be duplicated. However, where differences 
exist, each

[[Page 156]]

value and the vessel to which it applies shall be clearly indicated.
    (c) Stamping data (replaces UG-117). Except as noted in paragraph 
(d) of this section, the data shall be stamped directly on the pressure 
vessel. The data shall be legibly stamped and shall not be obliterated 
during the service life of the pressure vessel. In the event that the 
portion of the pressure vessel upon which the data is stamped is to be 
insulated or otherwise covered, the data shall be reproduced on a metal 
nameplate. This plate shall be securely attached to the pressure vessel. 
The nameplate shall be maintained in a legible condition such that it 
may be easily read.
    (1) Those parts of pressure vessels requiring Coast Guard shop 
inspection under this part which are furnished by other than the shop of 
the manufacturer responsible for the completed vessel shall be stamped 
with the Coast Guard Symbol, the Marine Inspection Office identification 
letters (see Sec. 50.10-30 of this subchapter) and the word ``Part'', 
the manufacturer's name and serial number, and the design pressure.
    (d) Thin walled vessels (modifies UG-119). In lieu of direct 
stamping on the pressure vessel, the information required by paragraph 
(a) of this section shall be stamped on a nameplate permanently attached 
to the pressure vessel when the pressure vessel is constructed of--
    (1) Steel plate less than one-fourth inch thick; or
    (2) Nonferrous plate less than one-half inch thick.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970; CGD 72-206R, 38 FR 17226, June 29, 1973; CGD 77-
147, 47 FR 21810, May 20, 1982]