ASTM F986-86(2022)

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.
Designation: F986 −86 (Reapproved 2022) An American National Standard
Standard Specification for
Suction Strainer Boxes
ThisstandardisissuedunderthefixeddesignationF986;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Classification
1.1 This specification covers the design, materials, and 3.1 This specification covers two types of strainer boxes.
construction of strainer boxes for use in ships’bilges and other 3.1.1 Type 1—Strainer boxes with pipe clamp centered on
such tank locations that require trash protection for suction the top of the strainer box (see Fig. 1).
pipes and pumps. 3.1.2 Type 2—Strainer boxes with the pipe clamp off center
in the top of the strainer box (see Fig. 2).
1.2 This specification covers pipe sizes from NPS 1 ⁄2
through NPS 16 (see Note 1).
4. Ordering Information
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
4.1 Ordering information required is as follows.
beensubstitutedinthisspecificationforsuchtraditionaltermsas“nominal
4.1.1 ASTM specification and year of issue.
diameter,” “size,” and “nominal size.”
4.1.2 Type.
1.3 The values stated in inch-pound units are to be regarded
4.1.3 Size (suction pipe NPS).
asstandard.Nootherunitsofmeasurementareincludedinthis
4.1.4 Dimensions G and H (Type 2 only).
standard.
4.1.5 Number of each type and size.
1.4 This international standard was developed in accor-
5. Materials and Manufacture
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.1 For information on materials, see Table 1.
Development of International Standards, Guides and Recom-
5.2 Welding shall be in accordance with AWS D1.3.
mendations issued by the World Trade Organization Technical
5.3 Perforated sheet metal shall have ⁄8-in. diameter holes
Barriers to Trade (TBT) Committee.
on staggered ⁄2-in. centers, 51% open area.
2. Referenced Documents
6. Dimensions and Tolerances
2.1 ASTM Standards:
6.1 Tolerance—6 ⁄16 in.
A36/A36MSpecification for Carbon Structural Steel
A123/A123MSpecification for Zinc (Hot-Dip Galvanized) 6.2 Strainer Box Dimensions:
Coatings on Iron and Steel Products 6.2.1 Type 1—See Table 2.
F593 Specification for Stainless Steel Bolts, Hex Cap 6.2.2 Type 2—See Table 3.
Screws, and Studs
7. Workmanship, Finish, and Appearance
F594Specification for Stainless Steel Nuts
F708Practice for Design and Installation of Rigid Pipe 7.1 Strainer boxes shall be hot galvanized in accordance
Hangers
with Specification A123/A123M after fabrication. The galva-
2.2 AWS Standard: nizing shall be a minimum of 2 mils thick.
AWS D1.3Structural Welding Code—Sheet Steel
7.2 Strainer boxes shall be free of defects, burrs, and sharp
edges.
This specification is under the jurisdiction ofASTM Committee F25 on Ships
8. Installation
and Marine Technology and is the direct responsibility of Subcommittee F25.11 on
Machinery and Piping Systems.
8.1 Strainerboxesarenormallyinstalledonsuctionpipesin
Current edition approved Oct. 1, 2022. Published October 2022. Originally
ɛ1
ballast and bilge spaces.
approved in 1986. Last previous edition approved in 2018 as F986–86 (2018) .
DOI: 10.1520/F0986-86R22.
8.2 Minimum suction pipe or tank bottom clearances are
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
indicated in Column “F” in Table 2 and Table 3. Dimension
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on callout is based on ⁄2 × the tailpipe nominal pipe size.
the ASTM website.
8.3 Tank structure and sloping bottom structure may ob-
Available from American Welding Society (AWS), 8669 NW 36 St., #130,
Miami, FL 33166-6672, http://www.aws.org. scure the above clearance down to the limit of the resulting
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F986 − 86 (2022)
NOTE 1—Tab location to suit perforated holes.
FIG. 1 Type 1—Elevation Strainer Box
peri
...