YD--T 841.4-2016地下通信用塑料管 第4部分：硅芯管.pdfVIP

ICS 33.040.50 M42 YD Communications Industry Standard of the Peoples Republic of China YD/T 841.4—2016 Replace Plastic duct for telecommunication underground conduit—— Part 4: Silicore plastic duct 地下通信用塑料管 第4部分：硅芯管 （English Translation） Issue Date:2016 - 04–05 Implementation date: 2016 - 07 – Issued by Ministry of Industry and Information Technology of the Peoples Republic of China YD/T 841.4—2016 Foreword China Communications Standards Association (CCSA)is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese originalshall be considered authoritative. YD/T 841 Plastic duct for telecommunication underground conduit consists of the following parts: ——Part 1: General; ——Part 2: Solid-wallduct; ——Part 3: Double-wallcorrugated duct; ——Part 4: Silicore plastic duct; ——Part 5: Plum blossom duct; ——Part 6: Grid duct; ——Part 7: Honeycomb duct; ——Part 8: Plastic-alloy composite duct; …… This part is the Part 4 of YD/T 841. This part is drafted in accordance with the rules given in the GB/T 1.1-2009 Directives for standardization –Part 1: Structure and drafting of standards. Attention isdrawntothe possibilitythat someoftheelementsofthispartmay bethe subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This part was proposed and prepared by CCSA. II YD/T 841.4—2016 Plasticductfor