ASTM_F_1020_-_86_2011.pdf

Designation:F102086(Reapproved 2011)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 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,and testing for line-blindvalves.1.2 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.3 The following safety hazards caveat pertains only 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 and healthpractices and determine the applicability of regulatory limita-tions prior to use.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 Other 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 Piping Components(Vi-sual Method)2.4 ASME Standard:ASME Boiler and Pressure Vessel Code,Sections II,VIII,IX53.Descriptions of Terms Specific to This Standard3.1 blanka solid one-piece circular unit inserted into apipeline to prevent flow.3.2 line-blind valvean assembly consisting of a spectacleplate,bolting,and body,the purpose of which is to provide aconvenient means to align a piping system to an open orpositively closed configuration.The assembly is designed toprovide a simplified method of changing over the flow controlspectacle plate without the necessity of plate removal from thevalve body.3.3 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 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 accordance with MSS-SP-55.4.2 Manufacture: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-load conditions as a result of its gasket factor,m,and gasket or joint-contact-surface unit seating load,y.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 April 1,2011.Published April 2011.Originallyapproved in 1986.Last previous edition approved in 2006 as F1020 86(2006).DOI:10.1520/F1020-86R11.2For 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 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,VA 22180-4602,http:/www.mss-.5Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three 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 States1 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 equivalent 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 lessthan 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 shall 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 considerati