ASTM F986-86(2004)

Standard Specification for Suction Strainer Boxes

ABSTRACT
This specification covers the design and material requirements as well as the construction strainer boxes used in ships' bilges and other tank locations requiring trash protection for suction pipes and pumps. Materials covered by this specification are Types 1 and 2 strainer boxes, which shall be manufactured free of defects, burrs, and sharp edges, and with dimensions conforming to the requirements specified. The strainer boxes shall be hot galvanized after fabrication.
SCOPE
1.1 This specification covers the design, materials, and construction of strainer boxes for use in ships' bilges and other such tank locations that require trash protection for suction pipes and pumps.
1.2 This specification covers pipe sizes from NPS 1½ through NPS 16 (see Note 1). Note 1—The dimensionless designator NPS (nominal pipe size) has been substituted in this specification for such traditional terms as "nominal diameter," "size," and "nominal size."
1.3 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 30-Apr-2004
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F986-86(1997) - Standard Specification for Suction Strainer Boxes
• Effective Date: 01-May-2004
• Replaced By: ASTM F986-86(2008) - Standard Specification for Suction Strainer Boxes
• Effective Date: 01-Nov-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
Designation: F 986 – 86 (Reapproved 2004)
Standard Specification for
Suction Strainer Boxes
This standard is issued under the fixed designation F 986; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 Type 2—Strainer boxes with the pipe clamp off center
in the top of the strainer box (see Fig. 2).
1.1 This specification covers the design, materials, and
constructionofstrainerboxesforuseinships’bilgesandother
4. Ordering Information
such tank locations that require trash protection for suction
4.1 Ordering information required is as follows.
pipes and pumps.
4.1.1 ASTM specification and year of issue.
1.2 This specification covers pipe sizes from NPS 1½
4.1.2 Type.
through NPS 16 (see Note 1).
4.1.3 Size (suction pipe NPS).
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
4.1.4 Dimensions G and H (Type 2 only).
beensubstitutedinthisspecificationforsuchtraditionaltermsas“nominal
4.1.5 Number of each type and size.
diameter,” “size,” and “nominal size.”
5. Materials and Manufacture
1.3 The values stated in inch-pound units are to be regarded
as the standard.
5.1 For information on materials, see Table 1.
5.2 Welding shall be in accordance with AWS D1.3.
2. Referenced Documents
5.3 Perforated sheet metal shall have ⁄8-in. diameter holes
2.1 ASTM Standards:
on staggered ½-in. centers, 51% open area.
A36/A36M Specification for Carbon Structural Steel
6. Dimensions and Tolerances
A 123/A 123M Specification for Zinc (Hot-Dip Galva-
nized) Coatings on Iron and Steel Products
6.1 Tolerance—6 ⁄16 in.
F593 Specification for Stainless Steel Bolts, Hex Cap
6.2 Strainer Box Dimensions:
Screws, and Studs
6.2.1 Type 1—See Table 2.
F594 Specification for Stainless Steel Nuts
6.2.2 Type 2—See Table 3.
F708 Practice for Design and Installation of Rigid Pipe
7. Workmanship, Finish, and Appearance
Hangers
2.2 American Welding Society Standard:
7.1 Strainer boxes shall be hot galvanized in accordance
AWS D1.3 Structural Welding Code—Sheet Steel
with SpecificationA123/A123M after fabrication. The galva-
nizing shall be a minimum of 2 mils thick.
3. Classification
7.2 Strainer boxes shall be free of defects, burrs, and sharp
3.1 This specification covers two types of strainer boxes.
edges.
3.1.1 Type 1—Strainer boxes with pipe clamp centered on
8. Installation
the top of the strainer box (see Fig. 1).
8.1 Strainerboxesarenormallyinstalledonsuctionpipesin
ballast and bilge spaces.
This specification is under the jurisdiction ofASTM Committee F25 on Ships
8.2 Minimum suction pipe or tank bottom clearances are
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
indicated in Column “F” in Table 2 and Table 3. Dimension
Current edition approved May 1, 2004. Published May 2004. Originally
callout is based on ½ 3 the tailpipe nominal pipe size.
approved in 1986. Last previous edition approved in 1997 as F986-86 (1997).
2 8.3 Tank structure and sloping bottom structure may ob-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
scure the above clearance down to the limit of the resulting
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
periphery clear area, being 1.5 3 the inside diameter of the
the ASTM website.
tailpipe.Structureoutsidethelimitof½thepipeNPSneednot
Available from TheAmerican Welding Society (AWS), 550 NW LeJeune Rd.,
be considered as obstructing flow.
Miami, FL 33126.
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F 986 – 86 (2004)
NOTE 1—Tab location to suit p
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