ASTM F986-86(2014)

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 11/2 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: 31-Jul-2014
• ICS: 47.020.30 - Piping systems
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.11 - Machinery and Piping Systems

Relations

• Replaces: ASTM F986-86(2008) - Standard Specification for Suction Strainer Boxes
• Effective Date: 01-Aug-2014

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F986 −86 (Reapproved 2014) An American National Standard
Standard Specification for
1
Suction Strainer Boxes
ThisstandardisissuedunderthefixeddesignationF986;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4. Ordering Information
1.1 This specification covers the design, materials, and 4.1 Ordering information required is as follows.
constructionofstrainerboxesforuseinships’bilgesandother
4.1.1 ASTM specification and year of issue.
such tank locations that require trash protection for suction
4.1.2 Type.
pipes and pumps.
4.1.3 Size (suction pipe NPS).
1
1.2 This specification covers pipe sizes from NPS 1 ⁄2
4.1.4 Dimensions G and H (Type 2 only).
through NPS 16 (see Note 1).
4.1.5 Number of each type and size.
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
5. Materials and Manufacture
beensubstitutedinthisspecificationforsuchtraditionaltermsas“nominal
diameter,” “size,” and “nominal size.”
5.1 For information on materials, see Table 1.
1.3 The values stated in inch-pound units are to be regarded
5.2 Welding shall be in accordance with AWS D1.3.
as the standard.
3
5.3 Perforated sheet metal shall have ⁄8-in. diameter holes
2. Referenced Documents
1
on staggered ⁄2-in. centers, 51% open area.
2
2.1 ASTM Standards:
A36/A36MSpecification for Carbon Structural Steel 6. Dimensions and Tolerances
A123/A123MSpecification for Zinc (Hot-Dip Galvanized)
1
6.1 Tolerance—6 ⁄16 in.
Coatings on Iron and Steel Products
6.2 Strainer Box Dimensions:
F593 Specification for Stainless Steel Bolts, Hex Cap
6.2.1 Type 1—See Table 2.
Screws, and Studs
F594Specification for Stainless Steel Nuts 6.2.2 Type 2—See Table 3.
F708Practice for Design and Installation of Rigid Pipe
Hangers 7. Workmanship, Finish, and Appearance
3
2.2 AWS Standard:
7.1 Strainer boxes shall be hot galvanized in accordance
AWS D1.3Structural Welding Code—Sheet Steel
with Specification A123/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
the top of the strainer box (see Fig. 1).
8. Installation
3.1.2 Type 2—Strainer boxes with the pipe clamp off center
in the top of the strainer box (see Fig. 2).
8.1 Strainerboxesarenormallyinstalledonsuctionpipesin
ballast and bilge spaces.
1
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
indicated in Column “F” in Table 2 and Table 3. Dimension
Machinery and Piping Systems.
1
callout is based on ⁄2 × the tailpipe nominal pipe size.
Current edition approved Aug. 1, 2014. Published September 2014. Originally
approved in 1986. Last previous edition approved in 2008 as F986–86 (2008).
8.3 Tank structure and sloping bottom structure may ob-
DOI: 10.1520/F0986-86R14.
2
scure the above clearance down to the limit of the resulting
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
periphery clear area, being 1.5 × the inside diameter of the
Standards volume information, refer to the standard’s Document Summary page on
1
tailpipe.Structureoutsidethelimitof ⁄2thepipeNPSneednot
the ASTM website.
3
be considered as obstructing flow.
Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
Miami, FL 33126, http://www.aws.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F986−86 (2014)
NOTE 1—Tab location to suit perforated holes.
FIG. 1Type 1—Elevation Strainer Box
2

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F986−86 (2014)
FIG. 2 Type 2—Elevation Rectangular Strainer
TABLE 1 Parts List
Item Number Description
3
1 Side—Sheet metal, 11 gage, perforated ⁄8-in.
1
diameter holes staggered on ⁄2-in. centers, carbon
steel, Specification A36/A36M.
3
2 Top—Sheet metal, 11 gage, perforated ⁄8-in. diam-
1
eter holes staggered on ⁄2-in. centers, carbon steel,
Specification A36/A36M.
1
3 Tab—Flatbar, ⁄4 in. thick by 1 in. wide by 2 in. long,
carbon steel, Specification A36/A36M or ABS
Grade A.
1
4 Screw—Tapping, plain hexagon washer head ⁄4
3
nominal size by ⁄4 in. long, Type 316 stainless
steel, Specification F593.
5 Clamp—Split cap, Practice F708 Fig. 1a, without
standoff.
6 Bolt—Hexagon head, stainless steel, Type
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F986 − 86 (Reapproved 2008) F986 − 86 (Reapproved 2014)An American National Standard
Standard Specification for
1
Suction Strainer Boxes
This standard is issued under the fixed designation F986; 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 (´) indicates an editorial change since the last revision or reapproval.
1. 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
1.2 This specification covers pipe sizes from NPS 1½1 ⁄2 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A36/A36M Specification for Carbon Structural Steel
A123/A123M Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
F593 Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs
F594 Specification for Stainless Steel Nuts
F708 Practice for Design and Installation of Rigid Pipe Hangers
3
2.2 American Welding Society AWS Standard:
AWS D1.3 Structural Welding Code—Sheet Steel
3. Classification
3.1 This specification covers two types of strainer boxes.
3.1.1 Type 1—Strainer boxes with pipe clamp centered on the top of the strainer box (see Fig. 1).
3.1.2 Type 2—Strainer boxes with the pipe clamp off center in the top of the strainer box (see Fig. 2).
4. Ordering Information
4.1 Ordering information required is as follows.
4.1.1 ASTM specification and year of issue.
4.1.2 Type.
4.1.3 Size (suction pipe NPS).
4.1.4 Dimensions G and H (Type 2 only).
4.1.5 Number of each type and size.
5. Materials and Manufacture
5.1 For information on materials, see Table 1.
5.2 Welding shall be in accordance with AWS D1.3.
3 1
5.3 Perforated sheet metal shall have ⁄8-in. diameter holes on staggered ⁄2½-in.-in. centers, 51 % open area.
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
Machinery and Piping Systems.
Current edition approved Nov. 1, 2008Aug. 1, 2014. Published December 2008September 2014. Originally approved in 1986. Last previous edition approved in 20042008
as F986 - 86F986 – 86 (2004).(2008). DOI: 10.1520/F0986-86R08.10.1520/F0986-86R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
3
Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126, http://www.aws.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F986 − 86 (2014)
NOTE 1—Tab location to suit perforated holes.
FIG. 1 Type 1—Elevation Strainer Box
6. Dimensions and Tolerances
1
6.1 Tolerance—6 ⁄16 in.
6.2 Strainer Box Dimensions:
6.2.1 Type 1—See Table 2.
6.2.2 Type 2—See Table 3.
7. Workmanship, Finish, and Appearance
7.1 Strainer boxes shall be hot galvanized in accordance with Specification A123/A123M after fabrication. The galvanizing
shall be a minimum of 2 mils thick.
7.2 Strainer boxes shall be free of defects, burrs, and sharp edges.
8. Installation
8.1 Strainer boxes are normally installed on suction pipes in ballast and bilge spaces.
8.2 Minimum suction pipe or tank bottom clearances are indicated in Column “F” in Table 2 and Table 3. Dimension callout
1
is based on ½ ⁄2 × the tailpipe nominal pipe size.
8.3 Tank structure and sloping bottom structure may obscure the above clearance down to the limit of the resulting periphery
1
clear area, being 1.5 × the inside diameter of the tailpipe. Structure outside the limit of ½ ⁄2 the pipe NPS need not be considered
as obstructing flow.
2

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F986 − 86 (2014)
FIG. 2 Type 2—Elevation Rectangular Strainer
3

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F986 − 86 (2014)
TABLE 1 Parts List
Item Number Description
3
1 Side—Sheet metal, 11 g
...