ASTM F994-86(2011)

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

ABSTRACT
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.
SCOPE
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.  
1.3 This specification does not include sea chest penetrations.  
1.4 This specification does not include penetrations in protective plating.

General Information

• Status: Historical
• Publication Date: 31-Mar-2011
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F994-86(2006) - Standard Specification for Design and Installation of Overboard Discharge Hull Penetration Connections
• Effective Date: 01-Apr-2011

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F994 −86 (Reapproved 2011) An American National Standard
Standard Specification for
Design and Installation of Overboard Discharge Hull
Penetration Connections
ThisstandardisissuedunderthefixeddesignationF994;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Department of the Navy, Bureau of Ship Design Data Sheet
100-1
1.1 This specification covers carbon steel overboard dis-
ABS Rules for Building and Classing Steel Vessels
charge hull penetrations for system piping of NPS 1 through
NPS 24 (see Note 1).
3. Classification
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
3.1 Type I—Nonreinforced penetrations. Table 1 provides
been substituted in this standard for such TRADITIONAL terms as
nominal diameter, size, and nominal size.
minimum schedules for the penetration pipe. See Fig. 1 for
details of the penetration.
1.2 The minimum pipe schedule and reinforcement dimen-
sions presented in Tables 1-6 are based on specifications in 46
3.2 Type II—Doubler plate-reinforced penetrations. Table 2
CFR, 56.50-95 and Navy Design Data Sheet 100-1.
provides minimum dimensions for doubler plates.
1.3 This specification does not include sea chest penetra- 3.2.1 Class 1—Inboard doubler plates. (Fig. 2)
tions.
3.2.2 Class 2—Outboard doubler plates. (Fig. 3)
1.4 This specification does not include penetrations in
3.3 Type III—Insert plate-reinforced penetrations. Table 3
protective plating.
provides minimum dimensions for insert plates.
3.3.1 Class 1—Single-bevel insert plates. (Fig. 4)
2. Referenced Documents
3.3.2 Class 2—Double-bevel insert plates. (Fig. 5)
2.1 ASTM Standards:
3.4 Type IV—Sleeve-reinforced penetrations. Fig. 6 details
A519 Specification for Seamless Carbon and Alloy Steel
sleeve-reinforced penetrations.
Mechanical Tubing
3.4.1 Class 1—Sleeves of nonmachined steel tube. Table 4
2.2 ANSI Standard:
provides minimum dimensions for nonmachined sleeves.
B36.10 Welded and Seamless Wrought Steel Pipe
3.4.2 Class2—Sleevesofmachinedsteeltubeorpipe.Table
2.3 Military Document:
5 provides minimum dimensions for machined sleeves.
MIL-STD-1689 Fabrication, Welding, and Inspection of
3.4.3 Class 3—Sleeves of rolled steel flatbar or plate. Table
Ships Structure
6 provides minimum dimensions for rolled sleeves.
2.4 Other Documents:
Title 46 Code of Federal Regulations (CFR), Subchapter F,
4. Materials
Marine Engineering
4.1 Discharge pipe shall be of an acceptable material as
specified by Title 46 CFR, 56.60-1.
This specification is under the jurisdiction of ASTM Committee F25 on Ships
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on 4.2 Doubler and insert plates shall be of material with
Machinery and Piping Systems.
physical properties equal to or better than the reinforced shell
Current edition approved April 1, 2011. Published April 2011. Originally
plate.
approved in 1986. Last previous edition approved in 2006 as F994 – 86 (2006).
DOI: 10.1520/F0994-86R11.
4.3 Reinforcing sleeve material shall depend on the penetra-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
tion pipe size:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. Available from Department of the Navy, Naval Sea Systems Command,
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Washington, DC 20362.
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:// Available from American Bureau of Shipping (ABS), ABS Plaza, 16855
dodssp.daps.dla.mil. Northchase Dr., Houston, TX 77060, http://www.eagle.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F994−86 (2011)
TABLE 1 Pipe Schedule for Type 1 Penetrations, NPS 1 Through
welding between the penetration and shell longitudinals,
A
NPS 24
stiffeners, or other structural members.
Pene-
5.3 Shell penetrations located above the light load line shall
tration
Shell Plating Thickness (T), in.
Pipe Size,
be clear of side ports, accommodation ladders, lifeboat-
NPS
handling areas, or other areas where discharge overboard is
5 3 7 1 3
¼–½ ⁄8 ⁄4 ⁄8 11 ⁄8 1¼ 1 ⁄8 1½
detrimental to normal operation of the vessel or would create a
1 80 80 160 160 160 160 XXS XXS XXS
nuisance for personnel or other vessels in the area.
1¼ 80 160 160 160 XXS XXS XXS XXS XXS
1½ 80 160 160 160 160 XXS XXS XXS XXS
5.4 Overboard discharges shall be located to minimize
2 80 160 160 160 160 160 160 XXS XXS
recirculation into suction seachests.
2½ 80 80 160 160 160 160 160 XXS XXS
3 80 80 160 160 160 160 160 160 XXS
5.5 Shell penetrations shall be located outside of cathodic
4 80 80 120 120 120 120 160 160 160
protection areas.
5 80 80 80 120 120 120 120 160 160
6 80 80 80 120 120 120 120 120 160
5.6 Unfavorable flow characteristics may result when small
8 80 80 80 80 100 100 100 120 120
10 60 60 60 80 80 100 100 100 120 diameter, extreme schedule penetration pipe is used in accor-
12 60 60 60 80 80 80 100 100 100
dance with Table 1. In this case, minimum allowable schedule
14 60 60 60 80 80 80 80 100 100
penetration pipe, with necessary reinforcement as specified in
16 40 60 60 60 80 80 80 80 100
18 40 40 60 60 60 80 80 80 80 Tables 2-6, is suggested.
20 40 40 60 60 60 60 80 80 80
5.7 Penetration pipe extension past the shell plate shall be
22 40 40 60 60 60 60 80 80 80
24 40 40 60 60 60 60 60 60 80
equal to the pipe wall thickness but not more than ⁄8 in.
A
See Fig. 1.
6. Welding
6.1 Welding shall be in accordance with Figs. 1-6 (see also
Penetration Pipe Size Sleeve Material ANSI B36.10).
6.2 Weld quality shall be in accordance with American
NPS 1 through NPS 10 Seamless Steel Tubing, Specification
A519.
Bureau of Shipping standards.
NPS 12 through NPS 18 Machined seamless steel pipe of same
material as penetration pipe. 6.3 Fillet welds shall be equal to the penetration pipe wall
NPS 20 through NPS 24 Steel flatbar or plate of same or 3
thickness but not more than ⁄8 in.
superior material as hull plate,
manufactured with a full pene-
6.4 Weld quality for military vessels shall be in accordance
tration, longitudinal butt weld.
with MIL-STD-1689.
5. General Requirements
7. Workmanship, Finish, and Appearance
5.1 Overboard discharges shall be combined to the maxi-
7.1 Surface areas, corners, and discharge pipe ends shall be
mum extent practicable to minimize the number of shell
free of burrs and sharp edges.
penetrations.
8. Keywords
5.2 A minimum of 3 in. shall be maintained between the
edge of penetrations and shell plate welding seams. Penetra-
8.1 discharge hull penetration; hull penetration; marine
tions shall be located so as to provide sufficient space for technology; penetration connection; ships; system piping
F994−86 (2011)
A
TABLE 2 Doubler Plate Dimensions (T × D) Type II Penetration, NPS 1 Through NPS 24 (in. × in.)
D
Penetrating
Pipe Size, Shell Plating Thickness (T), in.
NPS, SCH
5 3 7 1 3
¼to½ ⁄8 ⁄4 ⁄8 11 ⁄8 1¼ 1 ⁄8 1½
3 5 3 3
1, 80 ¼ × 5 ⁄8×5 ½×5 ⁄8×5 ⁄4×5 ⁄4×5 1×5 1×5 1¼×5
3 5 3 3
1¼, 80 ¼ × 6 ⁄8×6 ½×6 ⁄8×6 ⁄4×6 ⁄4×6 1×6 1×6 1¼×6
3 5 3 3
1½, 80 ¼ × 6 ⁄8×6 ½×6 ⁄8×6 ⁄4×6 ⁄4×6 1×6 1×6 1¼×6
3 5 3 3
2, 80 ¼ × 7 ⁄8×7 ½×7 ⁄8×7 ⁄4×7 ⁄4×7 1×7 1×7 1¼×7
3 5 3 3
2½, 80 ¼ × 7 ⁄8×7 ½×7 ⁄8×7 ⁄4×7 ⁄4×7 1×7 1×7 1¼×7
3 5 3 3
3, 80 ¼ × 8 ⁄8×8 ½×8 ⁄8×8 ⁄4×8 ⁄4×8 1×8 1×8 1¼×8
3 5 3 3
4, 80 ¼ × 9 ⁄8×9 ½×9 ⁄8×9 ⁄4×9 ⁄4×9 1×9 1×9 1¼×9
3 5 3 3
5, 80 ¼ × 10 ⁄8×10 ½×10 ⁄8×10 ⁄4×10 ⁄4×10 1×10 1×10 1¼×10
3 5 3 3
6, 80 ¼ × 12 ⁄8×12 ½×12 ⁄8×12 ⁄4×12 ⁄4×12 1×12 1×12 1¼×12
3 5 3 3
8, 80 ¼ × 14 ⁄8×14 ½×14 ⁄8×14 ⁄4×14 ⁄4×14 1×14 1×14 1¼×14
3 5 3 3
10, 60 ¼ × 16 ⁄8×16 ½×16 ⁄8×16 ⁄4×16 ⁄4×16 1×16 1×16 1¼×16
3 5 3 3
12, 60 ¼ × 18 ⁄8×18 ½×18 ⁄8×18 ⁄4×18 ⁄4×18 1×18 1×18 1¼×18
3 5 3 3
14, 60 ¼ × 20 ⁄8×20 ½×20 ⁄8×20 ⁄4×20 ⁄4×20 1×20 1×20 1¼×20
3 5 3 3
16, 40 ¼ × 22 ⁄8×22 ½×22 ⁄8×22 ⁄4×22 ⁄4×23 1×22 1×23 1¼×24
3 5 3 3
18, 40 ¼ × 24 ⁄8×24 ½×24 ⁄8×24 ⁄4×24 ⁄4×25 1×24 1×25 1¼×28
3 5 3 3
20, 40 ¼ × 26 ⁄8×26 ½×26 ⁄8×26 ⁄4×26 ⁄4×27 1×26 1×27 1¼×30
...