BAIJIAN - Third party testing organization
This standard specifies the terms、 definitions、 classifications、 grades、 dimensions、 shapes、 weights、 and allowable deviations、 technical requirements、 test methods、 inspection rules、 packaging、 markings、 and quality certificates of high ductility cold rolled ribbed steel bars for reinforced concrete. This standard applies to high ductility cold-rolled ribbed steel bars for reinforced and prestressed concrete、 as well as to high ductility cold-rolled ribbed steel bars (hereinafter referred to as steel bars) for manufacturing welded mesh. The following normative references are essential for the application of this document. For dated references、 only the dated version applies to this document. For undated reference documents、 the latest version (including revision sheets) applies to this standard. GB/T 222 Permissible deviations in chemical composition of finished products of steel GB/T 228.1 Tensile testing of metallic materials Part 1: Room temperature tensile testing methods GB/T 232 Bending test methods for metallic materials GB/T 238 Repeated bending test methods for metallic materials Wire GB/T 701 Hot rolled low carbon steel discs GB/T 2101 Acceptance、 packaging General provisions for markings and quality certificates GB/T 4354 High quality carbon steel hot-rolled wire rods GB/T 10120 Metal stress relaxation test methods GB13788 Cold rolled ribbed steel bars GB/T 17505 General technical requirements for delivery of steel and steel products YB/T 081 Principles for rounding off and determining detection values in metallurgical technical standards
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China