ASTM F991-86

Specification for Docking/Drain Plug and Boss Assemblies

SCOPE
1.1 This specification provides design, construction, and purchasing criteria for docking/drain plug and boss assemblies.  
1.2 Assemblies are intended for installation in shell, rudder, and tank bottom plate from 5/16 through 11/2 in.  
1.3 Assemblies shall be installed at the lowest point of a tank or rudder for draining during dry docking or cleaning of tanks.  
1.4 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1985
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.01 - Structures

Standards Content (Sample)

ASTM F=l91 Bb m 075=l530 00548b3 7 W
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Designation: F 991 - 86
AMERICAN SOCIETY FOR TESTING AND MATERIALS
1916 Race St. Philadelphia, Pa. 19103
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
If not listed in the current combined index, will appear in the next edition.
Standard Specification for
DOCKING/DRAIN PLUG AND BOSS ASSEMBLIES’
This standard is issued under the fixed designation F991; the number immediately following the designation indicates the year of
original adoption or. in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (f) indicates an editorial change since the last revision or reapproval.
1. Scope 5. Materials and Manufacture
1. I This specification provides design, con- 5.1 MaWials:
struction, and purchasing criteria for docking/ 5.1. I
Boss-ABS Grade A or B, plate or bar.
drain plug and boss assemblies. 5. I .2 Plzcg-Specification B 164 rod or bar.
1.2 Assemblies are intended for installation in 51.3 Other materials may be substituted to
shell, rudder, and tank bottom plate from 5/1ls
suit hull construction as approved by regulatory
through I % in. bodies.
1.3 Assemblies shall be installed at the lowest
5.2 Mantfaclure:
point of a tank or rudder for draining during dry 5.2. I Plugs and bosses shall be machined.
docking or cleaning of tanks. 5.2.2 Threads shall be in accordance with
1.4 The values stated in inch-pound units are ANSI B2. I.
to be regarded as the standard.
6. Dimensions and Tolerances
2. Referenced Documents
6.1 Dimensions shall be as indicated in Figs.
2.1 ASTM Standard:
I and 2.
B 164 Specification for Nickel-Copper Alloy 6.2 Tolerance shall be &‘/I6 in.
Rod and Ba8 6.3 Weight shall be as follows:
2.2 Other Documenls:
Type1 Type II
ABS Rules for Building and Classing Steel
Boss 3.5 lb 12.4 lb
Vessels3 Plug 0.8 lb 1.41b
Total 4.3 lb 13.8 lb
ANSI B2.1 Standard Pipe Threads Except
Dryseal
7. Installation
3. Classification 7.1 AI1 welding shall be the standards of the
rules for building and classing of steel vessels
3.1 Docking plugs and bosses shall be classi-
(ABS).
fied as follows:
7.2 Threads shall be adequately protected dur-
3.1.1 Type I-Docking plug and bosses for
ing installation.
plating from %6 to Y8 in. (see Fig. 1).
3.1.2 Type II-Docking plug and bosses for
plating greater than 5/s to 1% in. (see Fig. 2).
’ This specification
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