1、Designation: F 986 86 (Reapproved 2004)An American National StandardStandard Specification forSuction Strainer Boxes1This standard is issued under the fixed designation F 986; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the yea
2、r of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers the design, materials, andconstruction of strainer boxes for use in ships bilges and o
3、thersuch tank locations that require trash protection for suctionpipes and pumps.1.2 This specification covers pipe sizes from NPS 1through NPS 16 (see Note 1).NOTE 1The dimensionless designator NPS (nominal pipe size) hasbeen substituted in this specification for such traditional terms as “nominald
4、iameter,” “size,” and “nominal size.”1.3 The values stated in inch-pound units are to be regardedas the standard.2. Referenced Documents2.1 ASTM Standards:2A 36/A 36M Specification for Carbon Structural SteelA 123/A 123M Specification for Zinc (Hot-Dip Galva-nized) Coatings on Iron and Steel Product
5、sF 593 Specification for Stainless Steel Bolts, Hex CapScrews, and StudsF 594 Specification for Stainless Steel NutsF 708 Practice for Design and Installation of Rigid PipeHangers2.2 American Welding Society Standard:3AWS D1.3 Structural Welding CodeSheet Steel3. Classification3.1 This specification
6、 covers two types of strainer boxes.3.1.1 Type 1Strainer boxes with pipe clamp centered onthe top of the strainer box (see Fig. 1).3.1.2 Type 2Strainer boxes with the pipe clamp off centerin the top of the strainer box (see Fig. 2).4. Ordering Information4.1 Ordering information required is as follo
7、ws.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 Manufacture5.1 For information on materials, see Table 1.5.2 Welding shall be in accordance with AWS D1.3.5.3 Perforated s
8、heet metal shall have38-in. diameter holeson staggered -in. centers, 51 % open area.6. Dimensions and Tolerances6.1 Tolerance6116 in.6.2 Strainer Box Dimensions:6.2.1 Type 1See Table 2.6.2.2 Type 2See Table 3.7. Workmanship, Finish, and Appearance7.1 Strainer boxes shall be hot galvanized in accorda
9、ncewith Specification A 123/A 123M after fabrication. The galva-nizing shall be a minimum of 2 mils thick.7.2 Strainer boxes shall be free of defects, burrs, and sharpedges.8. Installation8.1 Strainer boxes are normally installed on suction pipes inballast and bilge spaces.8.2 Minimum suction pipe o
10、r tank bottom clearances areindicated in Column “F” in Table 2 and Table 3. Dimensioncallout is based on 3 the tailpipe nominal pipe size.8.3 Tank structure and sloping bottom structure may ob-scure the above clearance down to the limit of the resultingperiphery clear area, being 1.5 3 the inside di
11、ameter of thetailpipe. Structure outside the limit of the pipe NPS need notbe considered as obstructing flow.1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Curren
12、t edition approved May 1, 2004. Published May 2004. Originallyapproved in 1986. Last previous edition approved in 1997 as F 986 - 86 (1997).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volum
13、e information, refer to the standards Document Summary page onthe ASTM website.3Available from The American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.NOTE 1Tab location
14、to suit perforated holes.FIG. 1 Type 1Elevation Strainer BoxF 986 86 (2004)2FIG. 2 Type 2Elevation Rectangular StrainerTABLE 1 Parts ListItem Number Description1 SideSheet metal, 11 gage, perforated38-in.diameter holes staggered on -in. centers, carbonsteel, Specification A 36/A 36M.2 TopSheet metal
15、, 11 gage, perforated38-in.diameter holes staggered on -in. centers, carbonsteel, Specification A 36/A 36M.3 TabFlatbar, in. thick by 1 in. wide by 2 in. long,carbon steel, Specification A 36/A 36M or ABSGrade A.4 ScrewTapping, plain hexagon washer head14nominal size by34 in. long, Type 316 stainles
16、ssteel, Specification F 593.5 ClampSplit cap, Practice F 708 Fig. 1a, withoutstandoff.6 BoltHexagon head, stainless steel, Type 316Specification F 593. Size in accordance withPractice F 708.7 NutHexagon heavy, stainless steel, Type 316Specification F 594. Size in accordance withPractice F 708.F 986
17、86 (2004)3TABLE 2 Type 1 Strainer DimensionsFlat Surface InstallationABC D E FASuctionPipeNPSStrainerSideWidth,in.StrainerLength,in.StrainerHeight,in.HoleDiameter,in.TabLocation,in.PipeClearance,in.Weight,lb188611516 334 7.32 2716 3 1 7.51516 3 1 8.4314146 3916 3 1 14.341 4916 3 2 14.952020 558 3 2
18、22.862 661116 3 3 25.5826 681116 4 4 40.210 32 32 10 101316 5 5 61.312 38 38 12 121316 6 6 83.414 42 42 14 14116 4 and 10 7 106.216 48 48 16 16116 5 and 11 8 134.8ASee 8.2 and 8.3 of this specification.TABLE 3 Type 2 Strainer DimensionsAABAC DEFGBHSuctionPipe(NPS)Width,min,in.Length,min,in.Perimeter
19、,min, in.AHeight,in.HoleDiameter,in.TabLocation,in.PipeClearance,in.SideWidth,min, in.SideLength,min, in.1 278 434 20 6 11516 334 1716 2382338 618 25 6 2716 311116 31162 378 678 31 6 21516 1516 371634“ 734 38 6 3916 2316 3784538 9“ 49 6 4916 321116 4111656101516 62 6 558 356 8 12 74 6 61116 33468 10
20、 14 99 8 81116 445710 12 1658 123 10 101316 556! 851612 14 1938 147 12 121316 66718 9111614 1538 2058 162 14 14116 4 and 10 7 71116 1051616 1738 22# 184 16 16116 5 and 11 8 81116 11516AMinimum dimensions A and B are independent of one another and relate only to required clearances for the clamp asse
21、mbly and suction requirements. The totalminimum perimeter for the box is shown in the undesignated fourth column.BSee 8.2 and 8.3 of this specification.F 986 86 (2004)4ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin t
22、his standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must
23、be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of there
24、sponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700,
25、West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F 986 86 (2004)5
