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1、INTERNATIONAL STANDARD IS0 11082 First edition 1992-l l-l 5 Certification scheme for welded fabric for the reinforcement of concrete structures Syst - internal inspection by the manufacturer (see clause 5); - inspection and supervision by an external body (see clause 6). 2 Normative references The f
2、ollowing standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publica- tion, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard ar
3、e encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 6935-3:- ), Steel for the reinforcement of con- crete - Part 3: Welded fabric. IS0 9002: 19
4、87, Quality systems - Model for quality assurance in production and installation. I) To be published. ISO/IEC Guide 39:1988, Genera/ requirements for the acceptance of inspection bodies. ISO/IEC Guide 40:1983, General requirements for the acceptance of certification bodies. 3 Definitions For the pur
5、poses of this International Standard, the following definitions apply. 3.1 certification scheme: Certification system as related to specified products, processes or services to which the same particular standards and rules, and the same procedure, apply. lSO/lEC Guide 21 3.2 certification body: Body
6、 that conducts certi- fication of conformity. lSO/lEC Guide 21 3.3 characteristic value: Value having a prescribed probability of not being attained in a hypothetical un- limited test series. ISO 89301 NOTE 1 Equivalent to fractile, which is defined in IS0 3534. 3.4 fabric type: Fabric with wires an
7、d wire arrange- ments of one kind, however with variable length and width. 3.5 inspection: Activities such as measuring, ex- amining, testing, gauging one or more characteristics of a product or service and comparing these with specified requirements to determine conformity. ISO 84021 3.6 inspection
8、 body (for certification): Body that performs inspection services on behalf of a certi- fication body. lSO/lEC Guide 21 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21
9、 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 11082:1992(E) 4 Suitability testing 4.3.2 Sampling and testing of specimens 4.3.2.1 General 4.1 Purpose The purpose of the suitability testing is to ensure that the manufacturer has the capability and resources to produce
10、 welded fabric in accordance with the re- quirements specified in the product standards. 4.2 Organization The certification body shall comply with the require- ments of ISO/IEC Guide 40. 4.3 Procedure Suitability testing consists of the following stages: - inspection of conditions for production (4.
11、3.1); - sampling and testing of specimens (4.3.2); - verification of the long-term quality level (4.3.3). If satisfactory results are not achieved in one stage, all the stages shall be repeated. Suitability testing ap- plies separately for each type of fabric and each method of welding. If a fabric
12、type is manufactured by various welding processes, suitability testing shall be carried out to its full extent for each of these pro- cesses. 4.3.1 Inspection of the production conditions Inspection of the production conditions shall include the following: - the competence of the personnel and satis
13、factory organization of the work; - the adequacy of the equipment for production; - the independence of the department responsible for quality assurance from the production depart- ment; - the suitability of the test equipment for internal testing; - the ability of the manufacturer s quality system
14、to ensure the quality of the products. A quality sys- tem according to IS0 9002 is considered satisfac- tory. The inspection report shall include an evaluation of the activities from receipt of wire to dispatch of fabric. NOTE 2 The wire should be subject to a separate certi- fication scheme, accord
15、ing to IS0 10144. The test samples shall be taken from the production of the plant concerned. The test shall cover the entire range of diameters, grades and spacings for which certification is applied. 4.3.2.2 Extent of sampling and testing Three different fabric types shall be tested. For each sele
16、cted type, at least 30 test pieces shall be taken at random from at least 5 tons of a lot, to determine each mechanical and geometrical property specified in the product standard. The samples shall be taken at random from the lot presented for testing by a representative from the inspection body. Ca
17、re should be taken to ensure that the specimens taken generally reflect the properties of the fabric. 4.3.2.3 Properties to be tested All properties specified in the product standard shall be tested and compared with its requirements. 4.3.2.4 Evaluation of the test results The results (individual va
18、lues, average values, stan- dard deviations) of the tests shall be collated in a, test report. 4.3.2.5 Approval Once the test results have been evaluated positively by the certification body, a works symbol and an ap- proval to produce for a specific period are granted to the manufacturer. During th
19、is period the long-term quality level shall be verified. 4.3.3 Verification of the long-term quality level 4.3.3.1 Extent of testing In order to verify the long term quality level, the manufacturer shall perform an increased number of tests (internal and external inspection) for a suffi- ciently lon
20、g period (between 6 months and 1 year). The manufacturer shall double the extent of testing specified .in 5.2.1 .I for the internal inspection. During this period, external inspection shall be carried out more intensively than specified in 6.3. 4.3.3.2 Evaluation At the end of the period specified i
21、n 4.3.3.1, all results of internal and external inspection shall be evaluated separately and compared with each other. The long- term quality level determined by appropriate statistical methods shall correspond to the requirements of 5.2.2.2, if a characteristic value is specified in the product sta
22、ndard. 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21 MDTNo reproduction or networking permitted without license from IHS -,-,- 4.3.3.3 Approval Once the test results
23、 have been evaluated positively by the certification body, a licence is issued to the manufacturer. IS0 11082:1992(E) 5.2.2.1 Extent of testing 5 Internal inspection by the manufacturer 5.1 Purpose Continuous internal inspection of production by the manufacturer is intended to ensure that the level
24、of quality remains satisfactory with time and that, in the case of test results which do not conform to the conditions, necessary measures can be taken to im- prove production. 5.2 Procedure Internal inspection by the manufacturer consists of - testing of all partial quantities of continuous pro- du
25、ction (see 5.2.1); - determination of the long-term quality level (see 5.2.2). 5.2.1 Testing the partial quantities 5.2.1.1 Extent of testing The acceptance unit when testing partial quantities for each fabric type shall not exceed 25 tons. For each of the characteristics specified in the product st
26、an- dard, at least one test piece shall be taken from the test unit. 5.2.1.2 Evaluation of the test results When a characteristic value is specified, the following requirement for the individual values (3) of the test unit shall be met: where - continuous supervision of the proper procedure of inter
27、nal inspection as specified in clause 5. 3 , Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
28、0 11082:1992(E) 6.2 Organization The certification body may authorize an inspection body to carry out the external inspection and super- vision. The inspection body shall satisfy the require- ments of lSO/lEC Guide 39. 6.3 Procedure 6.3.1 External inspection and supervision by the or- ganization spe
29、cified in 6.2 shall be carried out at maximum intervals of 6 months. All properties subjected to internal inspection shall be tested. The specimens shall be taken from the manufacturer s or consummer s stock. The test re- sults shall be statistically evaluated and compared with the results from inte
30、rnal inspection. The number of tests in external inspection shall be sufficient to allow an assured assessment. The results of external and internal inspection shall also be assessed for systematic errors in sampling, test procedures and evaluation. To this end, parallel tests on test pieces from at
31、 least 10 sheets from the same fabric type shall be carried out in each case by the manufacturer and the body undertaking external inspection, and the results of these tests shall be compared. 6.3.2 The long-term quality level shall be determined at least twice a year and this shall be compared with
32、 the results achieved in internal inspection (see 5.2.2). 6.4 Evaluation The results of external inspection shall be recorded in a supervision report which shall be sent to the certi- fication body. If the results show that the production does not conform to the requirements, appropriate measures sh
33、all be taken, depending on the type and significance of the deficiencies noted, for example: - warning the manufacturer; - intensification of inspection (increase the fre- quency of testing); - requesting that the conditions of production should be changed; - withdrawal of approval. 7 Delivery docum
34、ent 7.1 Welded fabric which has been produced in compliance with the requirements of a relevant prod- uct standard and subjected to quality assurance as described in clauses 4 to 6 of this International Stan- dard, shall be supplied with a delivery document which contains the following information:
35、a) b) cl d) e) f) Cl) h) name of the manufacturing works; symbol or number of works; body carrying out external supervision; fabric type; designation according to the product standard; quantity supplied; date of manufacture; recipient. 7.2 Where welded fabric is supplied via a dealer or bending work
36、s, the dealer or bending works shall confirm on the delivery document that the fabric only orginates from manufacturing works which carry out quality supervision according to the requirements of this International Standard. 4 Copyright International Organization for Standardization Provided by IHS u
37、nder license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 11082:1992(E) Annex A (informative) Bibliography IS0 3534:1977, Statistics - Vocabulary and symbols. c41 IS0 8402: 19
38、86, Quality - Vocabulary. c51 I SO 8930: 1987, Genera/ principles on reliability for structures - List of equivalent terms. IS0 10144:1991, Certification scheme for steel bars and wires for the reinforcement of concrete s true tures. ISO/IEC Guide 2:1991, General terms and their definitions concerni
39、ng standardization and related activities. 5 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
40、0 11082:1992(E) UDC 672.85-034.14:691.328:006.63 Descriptors: concrete, reinforced concrete, reinforcing steels, steel products, welded wire lattice, certification. Price based on 5 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/26/2007 03:25:21 MDTNo reproduction or networking permitted without license from IHS -,-,-