[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: 46CFR53.05-2]

[Page 137-138]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 53_HEATING BOILERS--Table of Contents
 
          Subpart 53.05_Pressure Relieving Devices (Article 4)
 
Sec. 53.05-2  Relief valve requirements for hot water boilers (modifies 
HG-400.2).

    (a) The relief valve requirements for hot water boilers must be as 
indicated in article 4 of section IV of the ASME

[[Page 138]]

Code except as noted otherwise in this section.
    (b) Hot water heating boilers. Each hot water heating boiler must 
have at least one safety relief valve.
    (c) Hot water supply boilers. Each hot water supply boiler must have 
at least one safety relief valve and a temperature relief valve or a 
pressure-temperature relief valve. The valve temperature setting must 
not be more than 99 [deg]C (210 [deg]F).