46 CFR 153.470 - System for discharge of NLS residue to the sea: Categories A, B, C, and D.

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§ 153.470 System for discharge of NLS residue to the sea: Categories A, B, C, and D.

Unless waived under § 153.491, each ship that discharges Category A, B, or C NLS residue, or Category D NLS residue not diluted to 1/10th of its original concentration, into the sea under §§ 153.1126 and 153.1128 must have an NLS residue discharge system meeting the following:

(a)Minimum diameter of an NLS residue discharge outlet. The outlet of each NLS residue discharge system must have a diameter at least as great as that given by the following formula:

D = Minimum diameter of the discharge outlet in meters.
Qd = Maximum rate in cubic meters per hour at which the ship operator wishes to discharge slops (note: Qd affects the discharge rate allowed under § 153.1126(b)(2)).
L = Distance from the forward perpendicular to the discharge outlet in meters.
φ = The acute angle between a perpendicular to the shell plating at the discharge location and the direction of the average velocity of the discharged liquid.

(b)Location of an NLS residue discharge outlet. Each NLS residue discharge outlet must be located -

(1) At the turn of the bilge beneath the cargo area; and

(2) Where the discharge from the outlet is not drawn into the ship's seawater intakes.

(c)Location of dual NLS residue discharge outlets. If the value of 6.45 for K is used in § 153.1126(b)(2), the NLS residue discharge system must have two outlets located on opposite sides of the ship.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 28974, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989; CGD 95-028, 62 FR 51209, Sept. 30, 1997]

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United States Code
U.S. Code: Title 46 - SHIPPING
U.S. Code: Title 49 - TRANSPORTATION

Title 46 published on 09-May-2017 04:27

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 46 CFR Part 153 after this date.

  • 2015-10-22; vol. 80 # 204 - Thursday, October 22, 2015
    1. 80 FR 64192 - 2013 Liquid Chemical Categorization Updates
      GPO FDSys XML | Text
      Supplemental notice of proposed rulemaking.
      Comments and related material must be submitted to the online docket via http://www.regulations.gov, or reach the Docket Management Facility, on or before January 20, 2016.
      46 CFR Parts 30, 150, and 153