1、Designation: F 2271 03An American National StandardStandard Specification forPaintball Marker Barrel Blocking Devices1This standard is issued under the fixed designation F 2271; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the y
2、ear of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.INTRODUCTIONThis standard is intended to outline basic performance requirements for barrel blocking devices,commonly known
3、 as “barrel plugs.” A barrel blocking device is a critical piece of safety equipmentused in the sport of paintball.Paintball is a sport that, like all sports, has intrinsic hazards. These hazards include being hit bypaintballs. Protective equipment cannot eliminate all injuries but will substantiall
4、y reduce theirseverity and frequency. A barrel blocking device is an additional safety device that, when meeting thisstandard and properly used, can substantially reduce the severity and frequency of injuries. Paintballmarker barrels are not all the same inside diameter, thus necessitating performan
5、ce specifications forbarrel blocking devices that match the barrel blocking device to a barrel diameter. This specificationis written within the current state-of-the-art of paintball marker barrel and paintball barrel blockingdevice technology. The intent is to revise this specification whenever sub
6、stantive information becomesavailable which justifies revising existing requirements or adding new requirements.1. Scope1.1 This specification covers paintball barrel blocking de-vices that may be inserted or otherwise function to prevent apaintball from leaving the muzzle or the confines of the bar
7、relblocking device intact.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses areprovided 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
8、of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:2F 1979 Specification for Paintballs Used in the Sport ofPaintball3. Terminology3.1 Definitions of Ter
9、ms Specific to This Standard:3.1.1 Paintball Marker Terms:3.1.1.1 barrelthat portion of a paintball marker throughwhich the paintball is discharged.3.1.1.2 barrel blocking devicea muzzle blocking, safetydevice that prevents an intact paintball from being dischargedfrom the muzzle or leaving the conf
10、ines of the barrel blockingdevice. The device is often referred to as a barrel plug.3.1.1.3 muzzlethe end of the barrel at which the ball exitsthe barrel.3.1.1.4 muzzle diameterthe inside barrel diameter as mea-sured at the muzzle.3.1.1.5 paintballa spherical ball, commonly with a diam-eter of 17.3
11、mm (0.68 in.), comprised of a shell and a fill,designed to be expelled from a paintball marker and conformsto Specification F 1979.3.1.1.6 paintball markera device specifically designed todischarge paintballs. The device is sometimes referred to as apaintball gun.3.1.1.7 standard ambient temperature
12、 (SAT)used to de-scribe a substance at a temperature of 25 6 2C (77 6 4F).4. Significance and Use4.1 This specification establishes performance requirementsand test methods to provide a reasonable degree of safety in thenormal use of barrel blocking devices in paintball markers.1This specification i
13、s under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.24 onPaintball and Equipment.Current edition approved June 10, 2003. Published June 2003.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orconta
14、ct ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Conformance5.1 Barre
15、l blocking devices shall not, either by label or othermeans, indicate conformance with this specification unlessthey conform to all applicable requirements contained herein.6. General Requirements6.1 PerformanceUpon any discharge of a paintball from apaintball marker, the barrel blocking device must
16、 remaininserted or over the muzzle and prevent an intact paintball orshell fragment equal to or greater than 3 mm (0.118 in.) by 5mm (0.196 in.) from exiting the muzzle or the confines of themuzzle blocking device. Tests shall be conducted in accor-dance with 7.2.7. Test Methods7.1 No precision stat
17、ement on any of the following testmethods is available at this time.7.2 Barrel Blocking Device Retention Test:7.2.1 SignificanceThis method is performed to ensure thatthe barrel blocking device will remain in or over the barrel andprevent an intact paintball or shell fragment equal to or greaterthan
18、 3 mm (0.118 in.) by 5 mm (0.196 in.) from exiting themuzzle or the confines of the barrel blocking device.7.2.2 Apparatus:7.2.2.1 Paintball Marker, capable of hurling paintballs hori-zontally at a speed of 100.6 6 6 m/s (330 6 20 ft/s),7.2.2.2 Paintballs, per Specification F 1979.7.2.2.3 Barrel Blo
19、cking Device.7.2.2.4 Appropriate Backstop.7.2.2.5 Equipment employed to measure the speed of thetest paintball shall be used in accordance with the manufactur-ers instructions to measure the velocity of paintballs and shallbe accurate to within 60.5 m/s (61.6 ft/s) muzzle velocity.7.2.3 Conditioning
20、:7.2.3.1 All testing shall be done using paintballs manufac-tured within the previous eight months.7.2.3.2 Paintball storage and the non-test handling shall bedone at a relative humidity below 65 % and at SAT.7.2.3.3 Paintballs shall be conditioned in their originalsealed container for at least4hatt
21、hehumidity and temperaturespecified in 7.2.3.2.7.2.3.4 The barrel shall be conditioned for at least4hatSAT.7.2.3.5 The testing shall be conducted at the temperaturesspecified in 7.2.3.2 and shall be completed within 10 min afterremoval of the paintball from the sealed container. Thepaintball contain
22、er shall be resealed immediately after eachpaintball is removed.7.2.3.6 The barrel blocking device to be tested will beconditioned for at least4hatSAT.7.2.4 Test Specimen:7.2.4.1 The test specimen shall consist of a barrel blockingdevice properly installed into or over the muzzle.7.2.5 Procedure:7.2
23、.5.1 Conduct the test at SAT.7.2.5.2 The barrel is attached to the paintball marker inaccordance with the barrel and paintball marker manufacturersinstructions.7.2.5.3 The paintball marker shall be adjusted so that thevelocity of a paintball discharged from the marker would be100.6 6 6 m/s (330 6 20
24、 ft/s) when measured within 1 m (3.3ft) of the muzzle.7.2.5.4 The muzzle shall be immersed in paintball fillmaterial for 30 6 5 s at a minimum depth of 2.5 cm (1 in.)beyond the maximum point of insertion of the barrel blockingdevice. Upon removal from the fill material, the barrel will behung vertic
25、ally with the muzzle down for 30 6 5s.7.2.5.5 Insert or attach barrel blocking device to barrel.7.2.5.6 In a safe manner, discharge a paintball into the barrelblocking device, two times ata3sinterval between discharges.7.2.5.7 Observe the barrel blocking device and other itemsleaving the muzzle or t
26、he confines of the barrel blockingdevice.8. Keywords8.1 paintball; paintball barrel blocking devices; paintballbarrel plugs; paintball markers; paintball sportsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stan
27、dard. Users of this standard are expressly advised that determination of the validity of any such patent rights, 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 revie
28、wed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsibl
29、e technical committee, which you may attend. If you feel that your comments have not received a fair hearing 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 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).F2271032
