[Code of Federal Regulations]

[Title 49, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 49CFR230.48]



[Page 443-444]

 

                        TITLE 49--TRANSPORTATION

 

       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 

                             TRANSPORTATION

 

PART 230_STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table 

 

                   Subpart B_Boilers and Appurtenances

 

Sec.  230.48  Number and capacity.



    (a) Number and capacity. Every boiler shall be equipped with at 

least two safety relief valves, suitable for the service intended, that 

are capable of preventing an accumulation of pressure greater than 6 

percent above the MAWP under any conditions of service. An FRA inspector 

may require verification of sufficient safety valve relieving capacity.

    (b) Determination of capacity. Safety relief valve capacity may be 

determined by making an accumulation test with the fire in good, bright 

condition



[[Page 444]]



and all steam outlets closed. Additional safety relief valve capacity 

shall be provided if the safety relief valves allow an excess pressure 

of more than 6 percent above the MAWP during this test.