ASTM_F_1330_-_91_2012.pdf

Designation:F133091(Reapproved 2012)An American National StandardStandard Guide forMetallic Abrasive Blasting to Descale the Interior of Pipe1This standard is issued under the fixed designation F1330;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 guide covers metallic abrasive blasting to descalethe interior of carbon steel pipe.1.2 This guide is recommended for use in conjunction withan abrasive reclamation system.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 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 to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D2200 Practice for Use of Pictorial Surface PreparationStandards and Guides for Painting Steel SurfacesE18 Test Methods for Rockwell Hardness of Metallic Ma-terials2.2 SAE Standards:3J444 Cast Shot and Grit Size Specifications for PeeningCleaningJ827 Cast Steel Shot2.3 Other Documents:SSPC SP10 Surface Preparation Specifications4SFSA 20-66 Standard Specification for Cast Steel Abra-sives53.Significance and Use3.1 The maximum length and minimum diameter of the pipeshall be determined by the capacity of the blast equipmentused.3.2 This guide is recommended for removing mill scale,rustscale,paints,zincs,and oxides.4.General Requirements4.1 Before blasting,pipe shall be dry and free of slag andweld spatter which would not be removed by abrasive blasting.Pipe shall also be free of loose dust and debris which mighthamper the effectiveness of abrasive blasting.4.2 Abrasive blasting shall be accomplished in a dry areawith the ambient air condition such that condensation does notoccur.4.3 Shot and blasting equipment shall be stored at a tem-perature not less than 13C(10F)above the dew point of thesurrounding area.4.3.1 Abrasive reclamation system shall include a filtrationsystem capable of removing oxides,debris,dust,shot/gritfragments,and fines.4.4 Compressed air system shall be equipped with moistureremoval devices capable of reducing the dew point of the air atthe nozzle to 18C(approximately 0F)or less.4.5 Hoses shall have the maximum practical diameter andshall be as short as possible.4.6 Nozzles shall have the maximum possible aperture asdetermined by the capacity of the blast equipment and aslimited by the pipe diameter.4.7 Internal pipe cleaning nozzle assemblies are commer-cially available and shall be used where required.4.7.1 Internal pipe cleaning nozzle assemblies shall includea carriage which is capable of centering the nozzle concentri-cally in the pipe being blasted and a nozzle which is capable ofproducing a consistent 360 blast pattern.4.7.2 Diagrams of some commercially available internalpipe cleaning assemblies are provided in Figs.1-4.4.7.3 If a lance is required,it shall be at least as long as thepipe being blasted.4.8 Blasting shall be accomplished using an abrasive mix-ture of cast steel shot and grit,or with iron shot or grit.1This guide is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.11 onMachinery and Piping Systems.Current edition approved May 1,2012.Published May 2012.Originallyapproved in 1991.Last previous edition approved in 2006 as F1330 91(2006).DOI:10.1520/F1330-91R12.2For 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 Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.4Available from Society for Protective Coatings(SSPC),40 24th St.,6th Floor,Pittsburgh,PA 15222-4656,http:/www.sspc.org.5Available from Steel Founders Society of America(SFSA),780 McArdle Dr.,Unit G,Crystal Lake,IL 60014,http:/www.sfsa.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.8.1 Iron or grit may be used if desired.4.8.2 Cast steel shot and grit mixtures shall be sized inaccordance with SAE J444.4.8.3 Reclaimed shot and grit shall be of the same quality asthe original material.4.9 Cast steel shot shall be manufactured in accordance withSAE J827 and tempered to a hardness of 40-50 Rockwell C inaccordance with Test Methods E18(see Table 1).4.10 Cast steel grit shall be manufactured in accordancewith SFSA 20-66 and tempered to a hardness of 55-65Rockwell C in accordance with Test Methods E18(see Table2).4.11 Shot and