[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: 46CFR50.05-5]

[Page 110-111]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 50_GENERAL PROVISIONS--Table of Contents
 
                        Subpart 50.05_Application
 
Sec. 50.05-5  Existing boilers, pressure vessels or piping systems.

    (a) Whenever doubt exists as to the safety of an existing boiler, 
pressure vessel, or piping system, the marine inspector may require that 
it be gaged or checked to determine the extent of deterioration, and if 
necessary for safety may require the recalculation and reduction of the 
maximum allowable working pressure.
    (b) For the purpose of recalculating the maximum allowable working 
pressure of boilers, pressure vessels, or piping which have deteriorated 
in service, the applicable design formulas in effect at the time it was 
contracted for or built or the currently effective design formulas in 
this subchapter shall be used: Provided, That such recalculation based 
on currently effective design formulas in this subchapter does not 
permit a higher pressure than that originally allowed by the regulations 
in effect at the time such work was contracted for or built.
    (c) When existing vessels are reboilered, the mountings and 
attachments shall be renewed in accordance

[[Page 111]]

with the regulations in this subchapter in effect at the time such 
reboilering work is contracted for. The existing steam piping shall be 
examined. Those portions which are in good condition and comply with 
minimum thickness requirements in effect at the time such reboilering 
work is contracted for may be continued in service. The steam piping 
replaced shall be in accordance with the regulations in this subchapter 
in effect for new construction.
    (d) For the purpose of this section, existing equipment includes 
only items which have previously met all Coast Guard requirements for 
installation aboard a vessel certificated by the Coast Guard, including 
requirements for design, fabrication, testing, and inspection at the 
time the equipment was new.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9430, Mar. 8, 1985]