[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.47]

[Page 478]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230_STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of 
 
                   Subpart B_Boilers and Appurtenances
 
Sec.  230.47  Boiler number.

    (a) Generally. The builder's number of the boiler, if known, shall 
be stamped on the steam dome or manhole flange. If the builder's number 
cannot be obtained, an assigned number, which shall be used in making 
out specification cards, shall be stamped on the steam dome or manhole 
flange.
    (b) Numbers after January 10, 1912. Numbers which are stamped after 
January 10, 1912 shall be located on the front side of the steam dome or 
manhole flange at the upper edge of the vertical surface, oriented in a 
horizontal manner, and have figures at least \3/8\ inch high.
    (c) Name of manufacturer or owner. The number shall be preceded by 
the name of the manufacturer if the original number is known or the name 
of the steam locomotive owner if a new number is assigned.

                          Safety Relief Valves