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CFR › Title 46 › Chapter I › Subchapter F › Part 56 › Subpart 56.04 › Section 56.04-2

46 CFR 56.04-2 - Piping classification according to service.

There is 1 rule appearing in the Federal Register for 46 CFR 56. Select the tab below to view, or View eCFR (GPOAccess)
§ 56.04-2
Piping classification according to service.
The designation of classes according to service is found in Table 56.04-2.
Table 56.04-2—Pressure Piping Classification
Service Class 1 Pressure (p.s.i.g.) Temp. (°F)
Class B and C poisons 2 I any and 0 and above.
I-L any and below 0.
II (3 ) (3 ) (3 )
II-L (3 ) (3 ) (3 )
Gases and vapors 2 I above 150 or above 650.
I-L above 150 and below 0.
II 150 and below and 0 to 650.
II-L 150 and below and below 0.
Liquefied flammable gases 2 I above 150 and 0 and above. 1
I-L above 150 and below 0.
II 150 and below and 0 and above.
II-L 150 and below and below 0.
Molten sulphur I above 225 or above 330.
II 225 and below and 330 and below.
Cargo liquids Grades A through D 2 I above 225 or above 150.
I-L above 225 and below 0.
II 225 and below and 0 to 150.
II-L 225 and below and below 0.
Cargo liquids Grade E I above 225 or above 400.
I-L above 225 and below 0.
II 225 and below and 0 to 400.
II-L 225 and below and below 0.
Water I above 225 or above 350.
II 225 and below and 350 and below.
Fuels (Bunker, diesel, gasoline, etc.) I above 150 or above 150.
II 150 and below and 150 and below.
Lubricating oil I above 225 or above 400.
II 225 and below and 400 and below.
Asphalt I above 225 or above 400.
II 225 and below and 400 and below.
Heat transfer oil I above 225 or above 400.
II 225 and below and 400 and below.
Code of Federal Regulations - Page 176
Hydraulic fluid I above 225 or above 400.
II 225 and below and 400 and below.
Flammable or combustible dangerous cargoes. Refer to specific requirements of part 40 of this chapter .
Other dangerous cargoes. Refer to specific requirements of part 98 of this chapter .
1 Where doubt exists as to proper classification, refer to the Commandant for resolution.
2 For definitions, see 46 CFR parts 30, 151, and 154 . Note that the category “B and C” poisons is not used in the rules applying to self-propelled vessels (46 CFR part 153 ).
3 Not permitted except inside cargo tanks approved for Class B and C poisons.
[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 40164, Sept. 2, 1975; CGD 73-96, 42 FR 49024, Sept. 26, 1977]

Title 46 published on 2012-10-01

The following are only the Rules published in the Federal Register after the published date of Title 46.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2013-02-27; vol. 78 # 39 - Wednesday, February 27, 2013
    1. 78 FR 13243 - Updates to Standards Incorporated by Reference; Reapproved ASTM Standards; Technical Amendment
      GPO FDSys XML | Text
      DEPARTMENT OF HOMELAND SECURITY, Coast Guard
      Final rule.
      This rule is effective March 29, 2013. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register on March 29, 2013.
      33 CFR Parts 126, 127, 154, and 155

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United States Code
USC : Title 33 - NAVIGATION AND NAVIGABLE WATERS

§ 1321 - Oil and hazardous substance liability

§ 1509 - Marine environmental protection and navigational safety

USC : Title 43 - PUBLIC LANDS

§ 1333 - Laws and regulations governing lands

Presidential Documents

Executive Order ... 12777

Title 46 published on 2012-10-01

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

  • 2013-02-27; vol. 78 # 39 - Wednesday, February 27, 2013
    1. 78 FR 13243 - Updates to Standards Incorporated by Reference; Reapproved ASTM Standards; Technical Amendment
      GPO FDSys XML | Text
      DEPARTMENT OF HOMELAND SECURITY, Coast Guard
      Final rule.
      This rule is effective March 29, 2013. The incorporation by reference of certain publications listed in the rule is approved by the Director of the Federal Register on March 29, 2013.
      33 CFR Parts 126, 127, 154, and 155