ASTM F1138-1998(2014) Standard Specification for Spray Shields for Mechanical Joints《机械连接挡溅板的标准规范》.pdf

1、Designation: F1138 98 (Reapproved 2014) An American National StandardStandard Specification forSpray Shields for Mechanical Joints1This standard is issued under the fixed designation F1138; the number immediately following the designation indicates the year oforiginal adoption or, in the case of rev

2、ision, 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specific

3、ation describes the manufacturing require-ments for spray shield stock and the fabrication and installationrequirements for spray shields made from that stock.1.1.1 Sections 214address the manufacturing require-ments for the spray shield stock. Annex A1 addresses thefabrication and installation requ

4、irements for the spray shields.1.1.2 Fig. 1 shows the typical construction of a spray shield.Figs. 2-6 show methods of installation of a spray shield onvarious mechanical joints.1.2 The shields are intended for use around mechanicaljoints (flanged, bolted unions, and so forth) in liquid pipingsystem

5、s to prevent the impingement of flammable liquid on hotsurfaces or fluids onto electrical switchboards and componentsresulting from a leak in the mechanical joint.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.2. R

6、eferenced Documents2.1 ASTM Standards:2A176 Specification for Stainless and Heat-Resisting Chro-mium Steel Plate, Sheet, and StripA276 Specification for Stainless Steel Bars and ShapesA580/A580M Specification for Stainless Steel WireB134/B134M Specification for Brass WireB164 Specification for Nicke

7、l-Copper Alloy Rod, Bar, andWireB166 Specification for Nickel-Chromium-Iron Alloys (UNSN06600, N06601, N06603, N06690, N06693, N06025,N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617), and Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674) Rod, Bar, andWireD1308 Test Method for

8、 Effect of Household Chemicals onClear and Pigmented Organic FinishesD1424 Test Method for Tearing Strength of Fabrics byFalling-Pendulum (Elmendorf-Type) ApparatusD1682 Test Method for Breaking Load and Elongation ofTextile Fabric (Withdrawn 1992)3D1777 Test Method for Thickness of Textile Material

9、sD3389 Test Method for Coated Fabrics Abrasion Resistance(Rotary Platform Abrader)D3776 Test Methods for Mass Per Unit Area (Weight) ofFabricD3786 Test Method for Bursting Strength of TextileFabricsDiaphragm Bursting Strength Tester MethodD3951 Practice for Commercial PackagingF501 Test Method for A

10、erospace Materials Response toFlame, with Vertical Test Specimen (for Aerospace Ve-hicles Standard Conditions) (Withdrawn 1998)32.2 American Association of Textile Chemists and ColoristsStandards:AATCC-22 Water Repellency, Spray Test4AATCC-35 Water Resistance, Rain Test4AATCC-127 Water Resistance, H

11、ydrostatic Pressure Test42.3 Military Standards:MIL-C-20079 Cloth, Glass, Tape, Textile Glass and Thread,Glass5MIL-C-20696 Cloth, Coated, Nylon Waterproof52.4 Federal Standard:WW-C-440 Clamps, Hose (Low Pressure)53. Ordering Information3.1 ASTM designation and year of issue,3.2 Length and width requ

12、ired (see 7.1), and1This specification is under the jurisdiction of ASTM Committee F25 on Shipsand Marine Technology and is the direct responsibility of Subcommittee F25.07 onGeneral Requirements.Current edition approved Feb. 1, 2014. Published February 2014. Originallyapproved in 1988. Last previou

13、s edition approved in 2007 as F1138 98(2007).DOI: 10.1520/F1138-98R14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM

14、 website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American Association of Textile Chemists and Colorists(AATCC), P.O. Box 12215, Research Triangle Park, NC 27709, http:/www.aatcc.org.5Available from U.S. Government Printing Office Superinten

15、dent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.3 Type of stainless steel (see 4.1).3.4 Type of lacing hardware required (see 4

16、.1.1).4. Materials and Manufacture4.1 Lacing hooks, lacing rings, and lacing washers (see Fig.7) shall be constructed of stainless steel in accordance withSpecifications A176, A276,orA580/A580M.4.1.1 Lacing rings may be used instead of lacing hookswhere practicable or preferable (see 3.3).4.1.2 Laci

17、ng washers for fastening hooks or rings shall betwo-hole washers.4.2 Stitch wire (Piece 5 in Table 1) shall be constructed ofstainless steel in accordance with Specification A580/A580M.4.3 The aluminized glass cloth, thread, and the protectiveouter jacket shall be constructed of material as specifie

18、d inTable 1 and Table 2.5. Physical and Mechanical Properties5.1 The physical and mechanical properties for the alumi-nized glass cloth, thread, and protective outer jacket shall be asspecified in Table 1 and Table 2.6. Requirements6.1 If lacing hooks or rings are of the type that fasten bystitching

19、, the hooks or rings shall be attached to the backupwashers using a wire stitch machine and wire (Pieces 5 or 8 inTable 1).FIG. 1 Spray Shield Construction (Typical)FIG. 2 Installation of Butterfly Valve ShieldFIG. 3 Spray Shield for Pump Inlet HeadF1138 98 (2014)26.2 Lacing anchor/self-locking wash

20、er-type systems shallnot be used on spray shields.7. Dimensions and Permissible Variations7.1 The material for shields shall be standardized as given inTable 3 tolerances to be +14 in. (6 mm) and 0 in. for width.8. Workmanship, Finish, and Appearance8.1 The seam on both sides of the spray shield sha

21、ll beintact.8.1.1 On drawstring-type shields, there shall be ampleoverlap in the seam to allow wire to be run through the entirelength of the shield.8.2 There shall be no tears in the uncovered aluminumportion of the shield where contact is made with the mechani-cal joint (see Fig. 1).8.3 There shal

22、l be no tears in the protective outer jacketsuch that the aluminized glass cloth underneath is exposed.8.4 There shall be no holes or openings of any kind in theshields other than those made by sewing or the attachment oflacing hooks or rings.9. Sampling, Selection, and Number of Specimens9.1 Unless

23、 otherwise specified, the sampling of, selectionof, and number of specimens for the aluminized glass cloth,thread, and protective outer jacket shall be as specified in theapplicable test methods listed in Table 1 and Table 2.10. Test Methods10.1 The methods for testing the aluminized glass cloth,thr

24、ead, and protective outer jacket shall be as specified in Table1 and Table 2.11. Inspection11.1 Unless otherwise specified in the contract or purchaseorder, the contractor is responsible for performing inspectionsto determine conformance to the requirements specified inSection 8 of this specificatio

25、n.12. Rejection and Rehearing12.1 Material that fails to conform to the requirements ofthis specification may be rejected. Rejection should be reportedto the producer or supplier promptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make claim f

26、or a rehearing.13. Product Marking13.1 Indelible stamp denoting the width of the shield shallbe placed at 24-in. (610-mm) intervals on the visible foil sideof the shield so that it will be visible when the shield is rolledand packaged.14. Packaging and Package Marking14.1 The packaging, packing, and

27、 marking of containersshall be in accordance with Practice D3951, with the excep-tions noted in 14.1.1 and 14.1.2.14.1.1 Each container used for spray shield packaging shallcontain installation instructions as shown in Annex A2.14.1.2 Metal strapping shall not be used for containerclosure and reinfo

28、rcement.14.2 Installed lacing hooks and aluminized cloth shall be sopackaged that there shall be no damage to the cloth duringshipment.15. Keywords15.1 lacing; mechanical joints; shield; spray shieldFIG. 4 Spray Shield for Simplex StrainerF1138 98 (2014)3FIG. 5 Spray Shield for Butterfly ValveFIG. 6

29、 Spray Shield for Valve BonnetFIG. 7 Optional Lacing HardwareF1138 98 (2014)4TABLE 1 List of MaterialPieceNumberDescription Quality Material Specification Remarks1 Hook, lacing as required stainless steel302, 304 or 316ASTM A176, A276, A580/A580Msee 4.12 Cloth, aluminum foil, glass as required glass

30、/aluminum MIL-C-20079 Type I,Class 103 Thread as required glass MIL-C-20079 Type III,Class 3 (for machine sewing)nylon white, Size 5 Z-twist,three-ply4 Washer, blank as required stainless steel304 or 316ASTM A176, A27634-in. diameter 0.030 in. thick5 Wire, stitch as required stainless steel301, 304

31、or 316ASTM A580/A580M see 6.16 Label, identification as required see 137 Clamp, hose as required Cres 201 WW-C-440 Type F8 Wire as required brassCr-Ni-alloyCu-Ni-alloystainless steel304 or 316ASTM B134/B134MASTM B166ASTM B164ASTM A580/A580M17 or 18 gage17 or 18 gage17 or 18 gage17 or 18 gage9 Rings,

32、 lacing as required stainless steel302, 304 or 316ASTM A276, A580/A580M see 4.1.110 Fabric, protective outer jacket as required fiberglass cloth/siliconecoated fiberglasssee Table 2TABLE 2 Material DataProtective Outer JacketTypical PropertiesSilicone Coated Fiber-glass Cloth DataStyle SatinWeight,

33、oz/yd216.10Thickness, in. 0.018Count, W F 54 48Breaking strength, lb/in.WF625 625Weave 8 harnessWidth, in. 50 or 60Coated Properties Test Methods Product SpecificationCoating . . . Balanced, curedColor per standard SilverThickness Test Method D1777 0.019Weight, oz/yd2Test Method D3776 20.00Flame res

34、istance Test Method F501 0 flame (self-extinguishing)Breaking strength, lb/in.WFTest Methods D1682 470 410Tear strength, lb/in. W F Test Methods D1424 3531Abrasion resistance Test Method D3389(CS-10, 500 GMS)200 300 minMullen hydrostatic, psi AATCC-127 20 minWater resistance, rain test AATCC-35 Pass

35、 0 GMS5ftPass 0.10 GMD8ftWater repellancy, spray test AATCC-22 Pass 100 ratingMullen burst, psi Test Method D3786 800 minClark stiffness, CM Test Method D1308 18.0 maxOil resistance MIL-C-20696 PassAromatic hydrocarbonfluid resistanceMIL-C-20696 PassF1138 98 (2014)5ANNEXES(Mandatory Information)The

36、requirements of this section apply only to the fabrication and installation of the spray shields.A1. FABRICATION OF SPRAY SHIELDSA1.1 To determine spray shield length and width, the flangethat is to be shielded shall be measured as follows:A1.1.1 Shield length:Measure the circumference of the flange

37、. Add an overlap of14 of the circumference measurement, with the maximumbeing 8 in. (203 mm) and the minimum being 1 in. (25 mm).A1.1.1.1 To prevent dirt accumulation, the overlap shall bepointed downward (see Fig. A1.1).A1.1.2 Shield width:Measure from the inside edge of the bolt to the edge of the

38、flange (A). Measure the combined flange thickness (B). In thefollowing illustration, this would be “A+ B +A” as a minimumrequirement.A1.1.2.1 If the measured width contains a fraction, the nextwider shield stock shall be used (see 7.1). For example, if themeasured width is 512 in. (140 mm), 6-in. (1

39、52-mm) wide shield stock shall be used.A2. INSTALLATION OF SPRAY SHIELDSA2.1 General Installation:A2.1.1 The shield shall be centered on the joint, wrappedsnugly around the sides of the joint, and laced tightly with wire.A2.1.1.1 Clamps or wire, or both, are to be obtained by theuser and are not to

40、be supplied on the shield as manufactured.A2.2 Standard Installation:A2.2.1 Cut two lengths of lacing wire 6 in. (152 mm) longerthan the length of the shield.A2.2.2 Cut away seam material on each side of overlap andinsert lengths of wire into seams on both sides of shield untilthe wire emerges at th

41、e other end.A2.2.3 Wrap shield around flange with aluminized cloth onthe inside.A2.2.4 Fold shield edges down over flange bolts.A2.2.5 Twist ends of wire together sufficiently to maintaintightness, cut excessive wire, and fold down to be flat onshield. If additional tightness is required, use the la

42、cing hooksshown in Fig. 7.A2.3 Optional Installation (Lacing Hooks or Rings):A2.3.1 Cut away seam material on each side of overlap.There shall be a58-in. (16-mm) space between the end ofshield overlap and the first pair of lacing hooks.A2.3.1.1 Remove lacing hooks that would be under theoverlap.A2.3

43、.2 Wrap shield around flange with aluminized glasscloth on the inside.TABLE 3 Shield Material DimensionsLength, ft (m) Width, in. (mm)30 (9) 5 (127)30 (9) 6 (152)30 (9) 7 (178)30 (9) 8 (203)20 (6) 9 (229)20 (6) 10 (254)20 (6) 11 (279)20 (6) 12 (305)NOTE 1Maximum overlap is 8 in. (203 mm).NOTE 2Minim

44、um overlap is 1 in. (25 mm).FIG. A1.1 Shield LengthF1138 98 (2014)6A2.3.3 Fold shield edges down over flange bolts.A2.3.4 String wire through hooks on both sides and pulltight to secure shield in place.A2.3.5 Twist end of wire together sufficiently to maintaintightness, cut excessive wire, and fold

45、down to be flat onshield.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infring

46、ement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard

47、or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views

48、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, 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 ASTM website (www.astm.org/COPYRIGHT/).F1138 98 (2014)7