This section specifies the product model, classification, structure, requirements, test methods, inspection rules, marking, transportation, storage, etc. of double wall corrugated pipes for underground communication pipelines. This section is applicable to double wall corrugated pipes used in underground communication pipeline systems 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 references, the latest version (including all modification orders) applies to this document. GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Plan for Batch Inspection Retrieved by Acceptance Quality Limit (AQL) - GB/T 8806-2008 Plastics Pipeline Systems - Determination of Dimensions of Plastic Components (ISO 3126:2005, IDT) - GB/T 19472.1-2004 Polyethylene (PE) for Buried Applications Structural wall pipeline systems - Part 1: Polyethylene double wall corrugated pipes - GB/T 26572-2011 Limits for restricted substances in electronic and electrical products - YD/T 841.1-2016 Plastic pipes for underground communication pipelines - Part 1: General principles
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 problemsBaijian 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