1、Designation: F2774 09 (Reapproved 2014) An American National StandardStandard 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 adoptio
2、n 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 practice covers the manufacturing quality controlof Consumer Trampolin
3、e-Bed Material (CTM), describingtypes of tests, 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 qua
4、lity control.1.3 This practice does not address 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 manufacturi
5、ng quality control (MQC). Theseprocedures are designed 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 sta
6、ndard 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
7、ASTM Standards:2D123 Terminology Relating to TextilesD3786 Test Method for Bursting Strength of TextileFabricsDiaphragm Bursting Strength Tester MethodD4271 Practice for Writing Statements on Sampling in TestMethods for Textiles (Withdrawn 2009)3D4329 Practice for Fluorescent Ultraviolet (UV) Lamp A
8、p-paratus Exposure of PlasticsD5034 Test Method for Breaking Strength and Elongation ofTextile 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 Terminolog
9、y D123.3.1.2 Organizational Definitions:3.1.3 installer, nparty who installs, or facilitates installa-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
10、 organization thatpurchases any materials or work to be performed.3.1.6 supplier, nparty who supplies 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 se
11、rvice will satisfy given needs.3.1.9 quality control (QC), nplanned system of activitieswhose purpose 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
12、for sampling or statistical examination, havingone or more common properties and being readily 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 informatio
13、n that1This practice is under the jurisdiction of ASTM Committee F08 on SportsEquipment, Playing Surfaces, and Facilities and is the direct responsibility ofSubcommittee F08.17 on Trampolines and Related Equipment.Current edition approved May 15, 2014. Published September 2014. Originallyapproved in
14、 2009. Last previous edition approved in 2009 as F2774 09. DOI:10.1520/F2774-09R14.2For 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 pa
15、ge onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1can be used for making statistical inferences about the popu-lation(s) from whic
16、h samples are drawn.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 CTM must be properly manufactured in a mannerconsistent with a minimum level of quality control as deter-mined by
17、 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 manufacturers mayperform additional tests or at a greater frequency than requiredin this practice, or both. In this case
18、 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 recognized that purchasers and install-ers of CTM may require additional tests or a greater frequencythan called f
19、or 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 state of the practice. If such a request is made by thepurchasers or installers, they should clearly communicate ther
20、equirements 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 ofCTM may be selected to provide a statistically valid sample forselection of test specimens without previous knowl
21、edge 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 methodauthors in preparing sampling statements.5. Sampling Procedure for Manufacturers QualityControl (MQC) Testing5.1 Divis
22、ions 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 specifications, style, or physical characteristics.If portions that are billed or designated as separate lots areshipped
23、 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 quantity.5.2 Determination of Lot Sample Size:5.2.1 Use Table 1 to determine the lot sample size forquality control t
24、esting.5.2.2 When time intensive tests, such as ultravioletdegradation, are used do not test more than two units from asingle lot. Maintain information on the number of tests per lotand supply the information to the purchaser upon request.5.2.3 If a sample is required during manufacture, select theu
25、nits 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 both samples and specimens.6. Procedure for Recommended Quality Control Testsand Requirements6.1 The procedure for thi
26、s 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-finished materials and thefinished CTM it is recommended to test after CTM has beenfinished to create a smooth surface on
27、 at least one side.6.3 Other Manufacturing Quality Assurance or Confor-mance tests may be requested by the purchaser or installer,these tests should be contracted separately and all partiesinvolved satisfied with the practice or method being used, aswell as the laboratory performing the testing.7. K
28、eywords7.1 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 Selected1to2 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 mor
29、e 11F2774 09 (2014)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 rights, and the riskof infringement
30、 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 revision of this standard or fo
31、r additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known
32、 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
33、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;
34、http:/ 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 (400)Weft 1550 (350)MARVElongation % Test Method D5034 35 Maxim
35、umATrap 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 09 (2014)3
