[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of Octobery 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR35.01-25]

[Page 465-466]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 35_OPERATIONS--Table of Contents
 
              Subpart 35.01_Special Operating Requirements
 
Sec. 35.01-25  Sacrificial anode installations--TB/ALL.

    (a) The installation of magnesium sacrificial anodes in cargo tanks 
utilized for the carriage of flammable or combustible liquids in bulk is 
prohibited.
    (b) A sacrificial anode using an aluminum alloy will be permitted in 
cargo tanks under the following criteria:
    (1) The maximum allowable energy that can be developed by a falling 
anode shall be 200 foot-pounds.
    (2) No anode shall be installed more than 6 feet above the bottom of 
the tank. Special consideration will be given when structural design 
prevents the anodes from falling in event of failure of the attachments.
    (3) Each anode shall have at least two welded or bolted connections 
to the supporting structure. Special consideration will be given to 
proprietary attachments which provide equally safe installations.
    (4) The plans of the anode installation and a chemical analysis of 
the alloy composition shall be submitted

[[Page 466]]

for approval. The anode should be magnesium free and the silicon content 
limited to trace amounts.
    (5) The recommended construction of the anode should utilize a mild 
steel core with necessary attachments. Other types may be used but will 
require special consideration.
    (c) Sacrificial anodes using materials other than those having 
aluminum and/or magnesium in whole or in part are permitted.

[CGFR 69-72, 34 FR 17482, Oct. 29, 1969]