CMD-III/16:1786 - BIS

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STI/1786/R-1/9Sept. 2008SCHEME OF TESTING AND INSPECTIONFOR CERTIFICATION OFHIGH STRENGTH DEFORMED STEEL BARS AND WIRESFOR CONCRETE REINFORCEMENTACCORDING TO IS 1786:2008(Fourth Revision)1. LABORATORY – A laboratory shall be maintained which shall be suitably equipped and staffed where different tests givenin the specification shall be carried out in accordance with the methods given in the specification.2. TEST RECORDS - All records of tests, inspection and calibration shall be kept in suitable forms approved by the Bureau.2.1 All testing apparatus/measuring instruments shall be periodically checked and calibrated and records of such checks/calibrationshall be maintained.2.2 Copies of any records and other connected papers that may be required by the Bureau shall be made available at any time onrequest.3. QUALITY CONTROL – It is recommended that, as far as possible, Statistical Quality Control (SQC) methods may be usedfor controlling the quality of the product during production as envisaged in this Scheme [See IS 397(Part I), to IS 397(Part 4)].3.1 In addition, effort should be made to gradually introduce a Quality Management System in accordance with IS/ISO 9001.4. STANDARD MARK – The Standard Mark, as given in Column (1) of the First Schedule of the licence, is specifiedfor high strength deformed steel bars and wires for concrete reinforcement and may be marked on the product provided thematerials marked conform to all the requirements of the standards.4.1 TEST CERTIFICATE - For each consignment, of BIS certified material conforming to IS:1786-2008 there shall be a testcertificate which shall contain the Standard Mark, the cast/lot number, grade, size and corresponding test results (as given inAnnexure I).4.3 IDENTIFICATION AND MARKING
The manufacturer or supplier shall have ingots, billets and bars or bundles of bars/wires marked in such a way that all finishedbars/wires can be traced to the cast from which they were made. Every facility shall be given to the purchaser or hisauthorized representative for tracing the bars/wires to the cast from which they were made.4.3 For each bundle/coil of bars/wires a tag shall be attached indicating cast/lot number, grade and size.4.4 All bars/wires should be identifiable by marks/brands introduced during rolling which indicate the name of the manufacturer ortheir brand name.STI/1786/R-1/9Sept. 20084.5 Identification marks like brand name, trade-mark etc, that are introduced during rolling shall be designed and located in such amanner that the performance in use of the bar is not affected.4.6 High strength deformed steel bars and wires shall have the chemical composition in accordance with the requirementsspecified in clause 4.2 of the specification.4.7 Care shall be taken to segregate the tested billets/ingots for hot rolled deformed steel bars and wires, cast wise/grade wise onarrival of the wagons to the consignees destination if the billets/ingots/deformed bars or wire received do not carry the cast number ofother identification or mark, they shall be marked for identification.4.8 In case the quantity of ingots/billets in a cast is small and it is difficult to roll such material cast wise or it is not possible tosegregate ingots/billets cast wise, the same may be segregated grade wise into lots for rolling into finished steel.4.9 In case of mix up three samples for every 40 tonnes or part thereof the unidentified tested material shall be taken and tested forchemical analysis.4.10 A record shall be maintained showing the quantity of tested billets/ingots deformed bars or wires received and the productsrolled for each consignment, Billets and ingots shall not be mixed and rolled together.4.11 All twisting shall be carried out when cold. Stretching may or may not be combined with twisting. The untwisted length ateach end of the bar shall not exceed 100 mm or 4 times the nominal diameter,.4.12 In case ingots are manufactured by the licensee, the chemical composition of the ingots shall be checked at the levels of controlspecified in Table 1. Only those ingots which satisfy the chemical requirements specified in clause 4.2 of IS 1786:2008 shall be used.5. LEVELS OF CONTROL: Inspection and tests at various levels of controlspecified in Table2 shall be carried out on all quantities of steel covered by this Schemeand appropriate records and charts maintained in accordance with para 2 above. All theproduction which conforms to the Indian Standard and covered by the licence shall be
Page 5 and 6: Doc:STI/1786/PP/5Sept. 20085.3.4 Th
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Page 12 and 13: marked with certification mark of t
Page 14 and 15: nominal size by 40 per cent and 80
Page 16 and 17: TEST DETAILSSr. RequirementsNo.Test
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CMD-III/16:1786 - BIS

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