1、Designation: F2774 09Standard Practice forManufacturing Quality Control of Consumer Trampoline BedMaterial1This standard is issued under the fixed designation F2774; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、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 practice covers the manufacturing quality controlof Consumer Trampoline-Bed Material (CTM), describingtypes of tests,
3、the proper test methods, minimum testingfrequencies, and best practices for sampling.1.2 This practice is intended to aid manufacturers, suppliers,purchasers, installers, and end users of CTM in establishing aminimum level of effort for maintaining quality control.1.3 This practice does not address
4、manufacturing qualityassurance, product acceptance testing, or conformance testing.These are independent activities taken by organizations otherthan the CTM manufacturer.1.4 This practice covers procedures for sampling CTM forthe purpose of manufacturing quality control (MQC). Theseprocedures are de
5、signed to ensure the correct number ofrepresentative samples are obtained and properly reported bythe manufacturer.1.5 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafe
6、ty 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:2D123 Terminology Relating to Tex
7、tilesD3786 Test Method for Bursting Strength of TextileFabricsDiaphragm Bursting Strength Tester MethodD4271 Practice for Writing Statements on Sampling in TestMethods for Textiles3D4329 Practice for Fluorescent UV Exposure of PlasticsD5034 Test Method for Breaking Strength and Elongationof Textile
8、Fabrics (Grab Test)D5587 Test Method for Tearing Strength of Fabrics byTrapezoid Procedure3. Terminology3.1 Definitions:3.1.1 For definition of other textile terms used in thisstandard, refer to Terminology D123.3.1.2 Organizational Definitions:3.1.3 installer, nparty who installs, or facilitates in
9、stalla-tion of, any materials purchased from manufacturers or sup-pliers.3.1.4 manufacturer, ngroup, corporation, partnership, orindividual that manufactures a product.3.1.5 purchaser, nperson, company, or organization thatpurchases any materials or work to be performed.3.1.6 supplier, nparty who su
10、pplies material or services.3.1.7 Quality Definitions:3.1.8 quality assurance (QA), nall those planned or sys-tematic actions necessary to provide adequate confidence thata material, product, system, or service will satisfy given needs.3.1.9 quality control (QC), nplanned system of activitieswhose p
11、urpose is to provide a level of quality that meets theneeds of users; also, the use of such a system.3.1.10 Sampling Definitions:3.1.11 lot, nunit of production, or a group of other unit orpackages, taken for sampling or statistical examination, havingone or more common properties and being readily
12、separablefrom other similar units.3.1.12 sample, n(1) a portion of material which is takenfor testing or for record purposes; (2) a group of specimensused, or of observations made, which provide information thatcan be used for making statistical inferences about the popu-lation(s) from which samples
13、 are drawn.1This practice is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.17 onTrampolines and Related Equipment.Current edition approved Nov. 1, 2009. Published December 2009. DOI:10.1520/F2774-09.2For referenced
14、 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.3Withdrawn. The last approved version of this historical standard is referen
15、cedon www.astm.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.13 specimen, nspecific portion of material or labora-tory sample upon which a test is being performed or which istaken for that purpose.4. Significance and Use4.1
16、 CTM must be properly manufactured in a mannerconsistent with a minimum level of quality control as deter-mined by in-house testing of the final product. This practicesuggest types of tests, the methods of the testing and theminimum testing frequencies.4.2 It should be clearly recognized that manufa
17、cturers mayperform additional tests or at a greater frequency than requiredin this practice, or both. In this case the manufacturers qualitycontrol plan will take precedence over this practice. The quotedtests and test methods in Table 1 must appear in the QC planand QC report.4.3 It should also be
18、recognized that purchasers and install-ers of CTM may require additional tests or a greater frequencythan called for in this practice or both. The organization(s)producing such project specific specification or quality assur-ance plan should recognize that such requirements are beyondthe current sta
19、te of the practice. If such a request is made by thepurchasers or installers, they should clearly communicate therequirements to the manufacturer or supplier during the con-tract decisions in order that disputes do not arise at a subse-quent time.4.4 This practice provides a means by which samples o
20、fCTM may be selected to provide a statistically valid sample forselection of test specimens without previous knowledge of thevariability that may exist between production units.4.5 The principles stated in Practice D4271, and the illus-trative text in that practice can be used by the test methodauth
21、ors in preparing sampling statements.5. Sampling Procedure for Manufacturers QualityControl (MQC) Testing5.1 Divisions into LotsConsider as a sample lot anyportion of a production that represents the planned productionquantity that a producer is testing; that differs from otherportions in the specif
22、ications, style, or physical characteristics.If portions that are billed or designated as separate lots areshipped from different production plants, treat each separatelyshipped portion as a separate lot. When sampling is requiredduring manufacturing, consider a lot to be the planned produc-tion qua
23、ntity.5.2 Determination of Lot Sample Size:5.2.1 Use Table 1 to determine the lot sample size forquality control testing.5.2.2 When time intensive tests, such as ultraviolet degra-dation, are used do not test more than two units from a singlelot. Maintain information on the number of tests per lot a
24、ndsupply the information to the purchaser upon request.5.2.3 If a sample is required during manufacture, select theunits for the lot sample at uniformly spaced time intervalsthroughout the production period.5.2.4 For properties that are evaluated as attributes, the unitsin the lot sample serve as bo
25、th samples and specimens.6. Procedure for Recommended Quality Control Testsand Requirements6.1 The procedure for this practice is embodied in Table 2.6.2 The minimum recommended quality control tests for themanufacture of CTM are given in Table 2. Although the testscan be performed on both pre-finis
26、hed materials and thefinished CTM it is recommended to test after CTM has beenfinished to create a smooth surface on at least one side.6.3 Other Manufacturing Quality Assurance or Conform-ance tests may be requested by the purchaser or installer, thesetests should be contracted separately and all pa
27、rties involvedsatisfied with the practice or method being used, as well as thelaboratory performing the testing.7. Keywords7.1 consumer trampoline bed material; CTM; trampoline;trampoline bed materialTABLE 1 Number of Units to be Selected as Lot Sample MQCNumber of Units in Lot Number of Units Selec
28、ted1to2 13to8 29to27 328 to 64 464 to 125 5125 to 216 6217 to 343 7344 to 512 8513 to 729 9730 to 1000 101000 or more 11F2774 092ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard ar
29、e 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 reviewed every five years andif not
30、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 theresponsible technical committee, which yo
31、u 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
32、 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 als
33、o be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 2 Minimum Types of Tests and Requirements for MQC of CTMsTest Designation Units ASTM Standard Requirement Reported ValueBurst Strength kPa (psi) Test Method D3786 4650 (675) MARVTensile Strength N (lb) Test Method D5034 Warp 1780 (40
34、0)Weft 1550 (350)MARVElongation % Test Method D5034 35 MaximumATrap Tear N (lb) Test Method D5587 445 (100) MARVUV Degradation % Strength Retained Practice D4329 70 % after 5000 h exposure MinimumAThe highest sample value from documented MQC test results for a defined population obtained from one test method associated with a specific property.F2774 093
