Scope
This section specifies the structure, specifications, connection methods and accessories, technical requirements, test methods, inspection rules, judgment rules, marking, transportation, and storage of modified polypropylene plastic single wall corrugated conduits (hereinafter referred to as conduits) for underground use This section is applicable to conduits made of modified polypropylene as the main raw material and extruded to protect buried power cables
Normative references
The following documents are essential for the application of this section.
. For dated references, only the dated version applies to this section. For undated references, the latest version (including all modification orders) applies to this section GB/T 1408.1-2006 Test Methods for Electrical Strength of Insulating Materials, Part 1: Tests at Power FrequencyGB/T 1410-2006 Test Methods for Volume and Surface Resistivity of Solid Insulating Materials
GB/T 2918-1998 Standard Environment for Conditioning and Testing of Plastic Specimens
GB/T 8802-2001 Thermoplastic Pipe Determination of Vicat softening temperature of pipe fittings
GB/T 9647-2003 Thermoplastic pipes - Determination of ring stiffness
GB/T 10294-2008 Thermal insulation materials - Determination of steady-state thermal resistance and related properties, protective hot plate method
GB/T 12670-2008 Polypropylene (PP) Resin
GB/T 14152-2001 Test Method for External Impact Resistance of Thermoplastic Pipes - Clockwise Rotation Method
GB/T 19472.1-2004 Polyethylene (PE) Structural Wall Pipeline Systems for Buried Applications - Part 1: Polyethylene Double Wall Corrugated Pipes
DL/T 802.1-2007 Technical Conditions for Conduits for Power Cables - Part 1: General
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