1、Designation: F1020 86 (Reapproved 2018) An American National StandardStandard Specification forLine-Blind Valves for Marine Applications1This standard is issued under the fixed designation F1020; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、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 specification provides the minimum requirementsfor design fabrication, pressure rating,
3、and testing for line-blindvalves.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains onl
4、y to thetest methods portion, Section 5, of this specification: Thisstandard does not purport to address all of the safety concerns,if any, associated with its use. It is the responsibility of the userof this standard to establish appropriate safety, health, andenvironmental practices and determine
5、the applicability ofregulatory 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 Principles for theDevelopment of International Standards, Guides and Recom-mendations iss
6、ued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless2.2 ANSI Standards:3B16.5 Pipe Flanges and Flanged Fittings, Steel-NickelAlloyand Ot
7、her Special AlloysB31.1 Power Piping2.3 MSS Standards:4SP-6 Finish for Contact Faces of Pipe Flanges and Connect-ing End Flanges of Valves and FittingsSP-25 Marking System for Valves, Fittings, Flanges, andUnionsSP-55 Quality Standard for Steel Castings for Valves,Flanges and Fittings, and Other Pip
8、ing Components (Vi-sual Method)2.4 ASME Standards:5ASME Boiler and Pressure Vessel Code Sections II, VIII,IX3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 blanka solid one-piece circular unit inserted into apipeline to prevent flow.3.1.2 line-blind valvean assembly consisting
9、 of a spec-tacle plate, bolting, and body, the purpose of which is toprovide a convenient means to align a piping system to an openor positively closed configuration. The assembly is designed toprovide a simplified method of changing over the flow controlspectacle plate without the necessity of plat
10、e removal from thevalve body.3.1.3 spectacle plate (also spectacle blind)a figure-eight-shaped unit with one end open for flow and the other solid toprevent flow.4. Materials and Manufacture4.1 Materials:4.1.1 Materials for spectacle plates, bolting, and body shallbe those contained in ASME Section
11、II. For the purpose ofstress calculations, ASME Section VIII values shall be used.4.1.2 All welding shall be done with procedures and weldersqualified in accordance with ASME Section IX and 80 % weldefficiency factor shall be used.4.1.3 All castings shall be visually inspected and acceptablein accor
12、dance with MSS-SP-55.1This 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.Current edition approved March 1, 2018. Published April 2018. Originallyapproved in 1986. Last
13、 previous edition approved in 2011 as F1020 86 (2011).DOI: 10.1520/F1020-86R18.2For 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 o
14、nthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from Manufacturers Standardization Society of the Valve and FittingsIndustry (MSS), 127 Park St., NE, Vienna, VA22180-4602, http:/www.mss-hq.org
15、.5Available from American Society of Mechanical Engineers (ASME), ASMEInternational Headquarters, Two Park Ave., New York, NY 10016-5990, http:/www.asme.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard wa
16、s developed in accordance with internationally recognized principles 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.14.2 Manufact
17、ure:4.2.1 The spectacle plate shall be designed in accordancewith ANSI B31.1, Paragraph 104.5.3.4.2.2 The calculations of 4.2.3 and 4.2.4 shall ensure that aline blind is designed for the gasket material, of all that can beused with the line blind being designed, that imposes the mostcritical bolt-l
18、oad conditions as a result of its gasket factor, m,and gasket or joint-contact-surface unit seating load, y.4.2.3 The bolting shall be either of the following:4.2.3.1 Modify the external loads in accordance with Sec-tion 6 as determined using ASME Section VIII, Division 1,Appendix 2.4.2.3.2 The equi
19、valent in cross section to that of ANSIB16.5 flange bolting of equivalent nominal size and pressure.4.2.3.3 In no case shall bolts have a nominal diameter lessthan12 in. (12.7 mm).4.2.3.4 The material class shall be an approvedANSI B16.5material or equal in tensile strength.4.2.3.5 Cast bolting shal
20、l be X-rayed or have an 80 %efficiency factor applied.4.2.4 The body shall be calculated using ASME SectionVIII, Division 1, Appendix 2, with consideration for the sizeand material of bolting in the appendix, the bolt load satisfyingNote 2 of Paragraph 25 of Appendix 2.4.2.5 The spectacle plate and
21、mating body facings shall bein accordance with MSS-SP-6.5. Testing5.1 Each valve body shall be hydrostatically tested to theshell test pressure in accordance with ANSI B16.5, Table 3. Avalve supplied to the WOG standard shall be tested up to thenearest ANSI Class.5.2 Each valve shall be tested for l
22、eakage at pressure 1.5times the cold water rating of the valve rounded upward to thenext higher 25-psi (170-kPa) increment. Acceptance criteriashall be that no leakage occurs during a 10-min “hold time” atpressure.6. Calculations6.1 Bolting calculations from ASME Section VIII, Division1, Appendix 2,
23、 shall be modified to account for an externallyapplied load as a result of piping.Add to the minimum requiredbolt load for the operating conditions, Wm1, an externalmoment bolt load, Hx, such that the modified total cross-sectional area of the bolts shall be as follows:Am15 Wm11Hx!/Sbwhere:Hx= SZ/db
24、,Z = (Do4 Di4)/Do)/32,Di= Do2tp,tp= PDo/(2(0.875)(S), but not less than 0.25 in. (6.4 mm),anddb= C/ + 2(Go3 Gi3)/(Go2 Gi2)3.6.1.1 All terms are identical to those defined in ASMESection VIII, Appendix 2, with the addition of the following:6.1.1.1 Am1= modified total cross-sectional area of bolts atr
25、oot of thread or section of least diameter under stress, requiredfor the operating conditions, square inch (square millimetre).6.1.1.2 Hx= external moment of bolt load, lbf (N).6.1.1.3 0.875 = assumed pipe wall tolerance factor.6.1.1.4 S = ASME allowable stress of the pipe material atdesign temperat
26、ure, psi (kPa) (for purposes of meeting thisspecification, 15 000 psi (103.4 MPa) from Specification A53/A53M, Grade B, Type S shall be acceptable).6.1.1.5 Z = section modulus of pipe shell, cubic inches(cubic millimetres).6.1.1.6 Do= nominal outside diameter of pipe, inches(millimetres).6.1.1.7 Di=
27、 calculated inside diameter of pipe, inches(millimetres).6.1.1.8 tp= calculated pipe wall thickness, inches (millime-tres).6.1.1.9 db= moment arm of external moment on bolts andgasket, inches (millimetres).6.1.1.10 Go= outside diameter of contact surface of gasket,inches (millimetres).6.1.1.11 Gi= i
28、nside diameter of contact surface of gasket,inches (millimetres).6.2 The selection of bolts to be used shall be made such thatthe actual total cross-sectional area of bolts, Ab, will not be lessthan Am, where Amis taken as the greater of Am1and Am2.7. Product Marking7.1 Each valve must have the foll
29、owing markings in accor-dance with MSS-SP-25:7.1.1 Manufacturers name and trademark.7.1.2 Appropriate pressure class.7.1.3 Size of end connection.7.1.4 ASTM designation of materials.7.1.5 ASTM designation and year of issue of this specifi-cation.8. Keywords8.1 blind valve; line-blind valve; marine t
30、echnology; pipingsystem; ship; valveF1020 86 (2018)2ASTM 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 rig
31、hts, 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 be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for
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33、 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, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may
34、 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:/ 86 (2018)3
