[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.45]

[Page 331]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230--STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of Contents
 
                  Subpart B--Boilers and Appurtenances
 
Sec. 230.45  Method of testing.

    Steam gauges shall be compared with an accurate test gauge or dead 
weight tester. While under test load at the MAWP of the boiler to which 
the gauge will be applied, the gauge shall be set to read that pressure 
as accurately as the physical limitations of the gauge will allow. Under 
test the gauge shall read within the manufacturer's tolerance at all 
points on the gauge up to 25 percent above the allowed pressure. If the 
manufacturer's tolerance is not known, the gauge must read within 2 
percent full scale accuracy at all points on the gauge up to 25 percent 
above allowed pressure.