1、Designation: F1309 98 (Reapproved 2018) An American National StandardStandard Practice forInstallation Procedures for Fitting Chocks to MarineMachinery Foundations1This standard is issued under the fixed designation F1309; the number immediately following the designation indicates the year oforigina
2、l adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the acceptable methods of fittingchocks to ma
3、rine machinery foundations.1.2 The values stated in SI units shall be regarded asstandard. The values in parentheses are for information only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard
4、 to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Pr
5、inciples for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsD638 Test Method f
6、or Tensile Properties of PlasticsD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD695 Test Method for Compressive Properties of RigidPlastics2.2 Other Documents:American Bureau of Shipping Rules for Building andClassing Steel Vessels3American Weldin
7、g Society Publication, AWS D1.1 Struc-tural Welding Code43. Significance and Use3.1 This practice provides the three principal methods offitting chocks to marine machinery foundations to ensure thatthe machinery is free of vibration and perfectly aligned afterinstallation.3.1.1 The three principal m
8、ethods of installing chocksdescribed herein are as follows:3.1.1.1 Type AEpoxy-based resin, nonshrinking Chock-fast Orange PR 610 TCF by Philadelphia Resin Corp., or equal,and3.1.1.2 Type BTwo-piece wedge chocks.3.1.1.3 Type CSolid, one-piece fitted chocks.4. Procedure4.1 General Requirements for Ty
9、pes A, B, and C ChockingSystems:4.1.1 Machining:4.1.1.1 Type A chocks, machinery bedplates, foundationplates, and bolts do not require finish machining if the chocksare not designed to be removed. Unless specified otherwise,Types B and C chock, bolts/studs, machinery bedplate, foun-dation plates, an
10、d fitted holes need to be finished machined andfitted.4.1.1.2 Surfaces in way of the chock areas on the machinerybedplate and the foundation plate may be machined beforeinstallation or while the ship is not waterborne, or both.4.1.1.3 Unless otherwise specified, all finished surfacesshall be finishe
11、d to a maximum of 0.003mm roughness heightaverage (RHA).4.1.1.4 Finished areas on the machinery bedplate and thefoundation plate in way of the chocks shall be sufficientlygreater in size than the chock to prevent interference from theunfinished area with the chock during installation.4.1.1.5 Spotfac
12、e hole edge radius shall be such that therewill not be any interference between it and the bolt head-to-shank radius. The spotface area shall be sufficiently greater in1This practice is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Sub
13、committee F25.03 onOutfitting and Deck Machinery.Current edition approved April 1, 2018. Published May 2018. Originallyapproved in 1990. Last previous edition approved in 2012 as F1309 98 (2012).DOI: 10.1520/F1309-98R18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact
14、ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Bureau of Shipping (ABS), ABS Plaza, 16855Northchase Dr., Houston, TX 77060, http:/www.eagle.org.4Available from Ame
15、rican Welding Society (AWS), 8669 NW 36 St., #130,Miami, FL 33166-6672, http:/www.aws.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principle
16、s on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1area than that of the bolt head or nut so as not to cause anyinterference when
17、tightening or with the tooling used. Thespotface surfaces shall be perpendicular to the finished fittedhole centerline.4.1.2 Installation:4.1.2.1 The ship must be waterborne and fairly well com-pleted before final alignment is accomplished. Ship shall betrimmed as close to the even keel position as
18、practicable. Thesame trim position shall be maintained throughout the align-ment procedure. No heavyweight shall be moved, loaded, orunloaded during alignment; ramps for Ro-Ros shall not belowered or hoisted.4.1.2.2 Final machining of the fitted or bearing areas of themachinery bedplate to chock to
19、foundation plate and themating areas of the fitted portion of the bolt/stud shank and tothe hole wall shall be a minimum of 85 % uniformly distrib-uted around the mating area. A light coat of Prussian blue shallbe used to check the contact areas.4.1.2.3 Machinery shall be aligned using a sufficient
20、numberof jackscrews, shims, and wedges to accommodate adequateup-down, port-starboard, and fore-aft movement without dis-torting the machinery bedplate or foundation plate and, oncealigned, be able to hold that alignment firmly during the finalchock installation and bolt-fitting phase.4.1.2.4 A suff
21、icient number of fitted bolts and chocks shallbe installed to maintain the alignment and prevent any relativemovement between the machinery and the foundation as aresult of vibration and sea state inputs. Number and position offitted bolts shall comply with the engine manufacturersrequirements, if a
22、ny.4.1.2.5 Bolts shall be installed from the bottom up unlesssurrounding interferences dictate otherwise.4.1.2.6 The length of the fitted portion of the bolt/stub shankshall be 95 % of the combined thickness between spotfaces ofthe machinery bedplate, chock, and foundation plate.4.1.2.7 Final reamin
23、g of the fitted bolt holes or machining ofthe bolt shank shall occur after final alignment.4.1.2.8 Final torquing of each bolt/nut/stub assembly shallbe of sufficient torque to preload the nonfitted portions of thebolt/nut/stub enough to prevent loosening as a result ofvibrations, operations, hull,
24、and sea state inputs.4.1.2.9 Welding shall be performed in accordance withAmerican Bureau of Shipping or the American WeldingSociety, Structural Code AWS D1.1.4.1.3 Testing (If Specified):4.1.3.1 Steel tension tests shall be made in accordance withTest Methods and Definitions A370.4.1.3.2 Compressio
25、n yield and modulus of elasticity testsshall be made in accordance with Test Method D695.4.1.3.3 The tensile ultimate test shall be made in accordancewith Test Method D638.4.1.3.4 The shear ultimate test, the heat distorting tempera-ture test, and the shock resistance test shall be made inaccordance
26、 with Test Method D648.4.2 Type AEpoxy-based resins are pourable compoundsthat are poured into properly contained and vented volumesand cure at normal ambient temperatures without shrinkage toform a durable solid.4.2.1 Provision for Future Machinery RemovalTo preventadhesion of chocks to adjoining s
27、urfaces and facilitate futureremoval of machinery, spray an aerosol release agent on allcontact surfaces. This precaution allows these chocks to beremoved in a similar manner to steel chocks.4.2.2 Applicable Techniques:4.2.2.1 Position dams to retain the compound during pour-ing and curing without d
28、istortion. Damming materials may beexpanded plastic, foam rubber stripping and sheet metal, orlight gage flat bar. (See Fig. 1.)4.2.2.2 Follow resin manufacturers instructions includingthe relative design parameters on loading, temperature, allow-able thickness, additional design, installation, bolt
29、 tension, andinspection.4.2.3 Foundation BoltsInstall hold-down bolts beforepouring of resin. Tension (torque) bolts only after resinmanufacturers recommended cure time.4.3 Type B, Two-Piece Wedge ChockThe two-piecewedges are drop-forged, medium steel or machined from steelplate of equal strength or
30、 of other materials as specified.4.3.1 Applicable TechniquesFig. 2 indicates the configu-ration of Type C chocks to the machinery bedplate and thefoundation plate.4.3.1.1 The taper on the sloped faces of each half of thechock must not exceed a rise of one over a run of four.4.3.1.2 Align machinery i
31、n place as described in 4.1 andinstall the lower half of the tapered chock in place with thethicker end in first from the place installation. Ensure it doesnot move by tach welding. Do not allow distortions orseparations.4.3.1.3 Spotface the upper surface of the machinery bed-plate where the finish
32、has not been indicated.4.3.2 Fitting of Chocks and BoltsFig. 3 indicates thefitting of Type B chocks in way of the bedplates and foundationpieces.4.3.3 Bearing AreaTo obtain the 85 % bearing area, eithermeasure the spacing between the machine bedplate and thefoundation plate at the four corners in w
33、ay of the proposedchock location and machine the chocks as a unit to fit or, if thelower half of the taper chock is in place, take the samemeasurement between it and the machinery bedplate in way ofthe lower half. Machine the upper half to fit and verify theadequacy of the contact area.4.3.4 Drill h
34、oles in the bottom chock piece and foundationplate, either with machinery unit in place or by the marking ofholes and lifting the unit clear. Spotface the bottom side of thefoundation plate in way of bolt heads.4.3.5 Fitted BoltsFit the bolts/studs to the holes by mea-suring diameters at 90 to each
35、other in approximately fourplanes equally spaced through the hole and machine thebolt/stub shank to fit or ream the hole to fit the bolt. Torque thenuts to the proscribed torque.4.3.6 Excess Length of ChockDetermine the length (withan extra allowance for fitting), and the thickness of the topmostpie
36、ce of the permanent chock assembly (wedge) at installation.Drill the wedge only after it has been finally fitted in place.Face off the excess length flush with plate edges, and preserveF1309 98 (2018)2the relative positions of chock parts by tackwelding. For therestrictions and size of the taper see
37、 Fig. 3.4.4 Type C, Solid, One-Piece Fitted ChocksThe chocksare medium steel machined from plate steel consistent with themachinery bedplate and foundation plate and the loads im-posed or of other materials as specified.4.4.1 Applicable TechniquesFig. 2 indicates the configu-ration of Type C chocks
38、to the machinery bedplate and thefoundation plate.4.4.2 Align machinery in place as described in 4.1.Donotallow distortions or separations.4.4.3 Bearing AreaTo obtain the 85 % bearing area,measure the spacing between the machinery bedplate and thefoundation plate, measure the gap at the four corners
39、 in way ofthe proposed chock location as indicated in Fig. 2, machine thechock to fit, and verify the adequacy of the bearing area.4.4.4 Fitted BoltsFit the bolts/studs to the holes by mea-suring diameters at 90 to each other in approximately fourplanes equally spaced through the hole and machine th
40、ebolt/stub shank to fit or ream the hole to fit the bolt/stud.Torque the nuts to the proscribed torque.5. Keywords5.1 chocks; fitting chocks; foundations; installation; ma-chinery foundations, marine; procedures; shipFIG. 1 Type A Epoxy-Based Resin ChockF1309 98 (2018)3FIG. 2 Type C Chock Solid (One
41、 Piece)F1309 98 (2018)4SUPPLEMENTARY REQUIREMENTSS1. ScopeS1.1 Supplementary requirements only apply if specified inthe contract or purchase order.S2. Reference DocumentsS2.1 Military Document:MIL-S-901 Shock Tests, H.I. (High Impact); Shipboard,Machinery, Equipment and Systems, Requirements for5S3.
42、 Supplementary Test RequirementsS3.1 If specified, shock in accordance with MIL-S-901.5Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.NOTE 11 in. = 25.4 mmFIG. 3 Type B, Wedge Chocks (Two Piece)F1309 98 (2018)5ASTM Internat
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46、ds, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 98 (2018)6
