46 CFR 56.60-20 - Nonferrous materials.

§ 56.60-20 Nonferrous materials.
Nonferrous materials listed in this subpart may be used in piping systems under the following conditions (see also § 56.10-5(c)):
(a) The low melting points of many nonferrous metals and alloys, such as aluminum and aluminum alloys, must be recognized. These types of heat sensitive materials must not be used to conduct flammable, combustible, or dangerous fluids, or for vital systems unless approved by the Marine Safety Center.
Note:
For definitions of flammable or combustible fluids, see §§ 30.10-15 and 30.10-22 or parts 151-154 of this chapter. Dangerous fluids are those covered by regulations in part 98 of this chapter.
(b) The possibility of galvanic corrosion due to the relative solution potentials of copper and aluminum and their alloys should be considered when used in conjunction with each other or with steel or with other metals and their alloys when an electrolyte is -present.
(c) A suitable thread compound must be used in making up threaded joints in aluminum pipe to prevent seizing which might cause leakage and perhaps prevent disassembly. Pipe in the annealed temper should not be threaded.
(d) The corrosion resistance of copper bearing aluminum alloys in a marine atmosphere is poor and alloys with copper contents exceeding 0.6 percent should not be used. Refer to Table 56.60-2(a) of this part for further guidance.
[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 40612, Oct. 2, 1989; CGD 95-027, 61 FR 26001, May 23, 1996]

Title 46 published on 2013-10-01

no entries appear in the Federal Register after this date.

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United States Code
Presidential Documents

Executive Order ... 12234

Executive Order ... 12777

Title 46 published on 2013-10-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 46 CFR 56 after this date.

  • 2014-01-13; vol. 79 # 8 - Monday, January 13, 2014
    1. 79 FR 2254 - Harmonization of Standards for Fire Protection, Detection, and Extinguishing Equipment
      GPO FDSys XML | Text
      DEPARTMENT OF HOMELAND SECURITY, Coast Guard
      Notice of proposed rulemaking.
      Comments and related material must either be submitted to our online docket via http://www.regulations.gov on or before April 14, 2014 or reach the Docket Management Facility by that date.
      33 CFR Parts 140, 145, 148, and 149