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ASTM F994-86(2018)

Historical Reaffirmation

Standard Specification for Design and Installation of Overboard Discharge Hull Penetration Connections

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1.1 This specification covers carbon steel overboard discharge hull penetrations for system piping of NPS 1 through NPS 24 (see Note 1).

Note 1: The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such TRADITIONAL terms as nominal diameter, size, and nominal size.

1.2 The minimum pipe schedule and reinforcement dimensions presented in Tables 1-6 are based on specifications in 46 CFR, 56.50-95, and Navy Design Data Sheet 100-1.

(A) See Fig. 1.
(A) See Fig. 2 and Fig. 3.
(A) See Fig. 4 and Fig. 5.
(A) See Fig. 6.
(A) See Fig. 6.
(A) See Fig. 6.

1.3 This specification does not include sea chest penetrations.

1.4 This specification does not include penetrations in protective plating.

1.5 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.

1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


This specification covers carbon steel overboard discharge hull penetrations for system piping. Penetrations shall be classified as follows: Type I; Type II (Class 1 and Class 2); Type III (Class 1 and Class 2); and Type IV (Classes 1, 2, and 3). Doubler and insert plates shall be of material with physical properties equal to or better than the reinforced shell plate. Overboard discharges shall be combined to the maximum extent practicable to minimize the number of shell penetrations. Overboard discharges shall be located to minimize recirculation into suction seachests. Shell penetrations shall be located outside of cathodic protection areas. Penetration pipe extension past the shell plate shall be equal to the pipe wall thickness.


SDO ASTM: ASTM International
Document Number F994
Publication Date March 1, 2018
Language en - English
Page Count 7
Revision Level 86(2018)
Supercedes
Committee F25.11
Publish Date Document Id Type View
Jan. 1, 1996 F0994-86R96E01 Revision
Oct. 1, 2022 F0994-86R22 Reaffirmation
March 1, 2018 F0994-86R18 Reaffirmation
April 1, 2011 F0994-86R11 Reaffirmation
Feb. 1, 2006 F0994-86R06 Reaffirmation
March 27, 1986 F0994-86R01 Reaffirmation
March 27, 1986 F0994-86R96 Reaffirmation