Detail of GB/T 19685-2017

Introduction of GB/T 19685-2017

Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. This standard is developed in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 19685-2005 Prestressed Concrete Cylinder Pipe. The following changes have been made with respect to GB/T 19685-2005 (the previous edition): ——The limit on height of fill above top of pipe is canceled from the "Scope" (see Chapter 1 of Edition 2005); ——Partial normative references are revised (see Chapter 2; Chapter 2 of Edition 2005); ——The specifications of lined pipes (PCCPDL600, PCCPDL700, PCCPDL800 and PCCPDL900) with duo-gasket joint (see Table 1); ——The specifications of embedded pipes (PCCPE1000 and PCCPE1200) with single gasket joint or duo-gasket joint (see Tables 2 and 3); ——The socket depth, spigot length and joint clearance of embedded pipes (PCCPDE3600, PCCPDE3800 and PCCPDE4000) with duo-gasket joint are adjusted (see Table 3; Table 3 of Edition 2005); ——The net thickness of minimum protection layer is adjusted (see Tables 1, 2 and 3; Tables 1, 2 and 3 of Edition 2005); ——The requirements on mud content of sand used for pipe core concrete are adjusted (see 5.2; 5.2 of Edition 2005); ——The water absorption index of cement mortar protection layer is adjusted (see 6.2.10.3; 6.2.9.3 of Edition 2005); ——The requirements on pipe core thickness deviation are deleted, and the deviation requirements of socket depth and spigot length are adjusted (see Table 5; Table 5 of Edition 2005); ——The permissible relative rotation angle of partial pipe joints are adjusted (see Table 6; Table 6 of Edition 2005); ——Partial inspection items and index categories are adjusted (See Tables 8 and 9; Tables 8 and 9 of Edition 2005); ——Annexes A and B of Edition 2005 are deleted; ——The pressure for inspection on crack resistance (Pt value) of pipe (finished product) under common working condition is adjusted (see Annex A; Annex C of Edition 2005). This standard was proposed by China Building Materials Federation. This standard is under the jurisdiction of SAC/TC 197 National Technical Committee on Cement Products of Standardization Administration of China. The previous edition of this standard is as follows: ——GB/T 19685-2005. Prestressed Concrete Cylinder Pipe 1 Scope This standard specifies terms, definitions, main symbols, classification, raw and auxiliary materials, pipe manufacture technical requirements, pipe fittings, test methods, inspection rules, marking, transport and storage as well as application requirements and certificate of merchandise of prestressed concrete cylinder pipe. This standard is applicable to the manufacture of prestressed concrete cylinder pipe with nominal inner diameter of 400 mm~4,000 mm and pipeline operation working pressure or static head pressure not exceeding 2.0 MPa; and it may serve as a reference for the manufacture of pipe exceeding the range given in this standard. Pipes manufactured according to this standard may be used for municipal water supply and discharge main pipe, industrial water pipeline, farm irrigation, factory pipe network, power plant make-up water pipe and cooling water circulation system, inverted siphon, pressure tunnel pipeline, pipe ditch, pipe gallery and culvert pipe with large height of fill above its top. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 175 Common Portland Cement GB/T 699 Quality Carbon Structure Steels GB/T 700 Carbon Structural Steels GB 912 Hot-rolled Sheets and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels GB 1499.2 Steel for the Reinforcement of Concrete - Part 2: Hot Rolled Ribbed Bars GB/T 1499.3 Steel for the Reinforcement of Concrete - Part 3: Welded Fabric GB/T 1596-2005 Fly Ash Used for Cement and Concrete GB/T 2651 Tensile Test Method on Welded Joints GB/T 2653 Bend Test Methods on Welded Joints GB/T 3274 Hot-rolled Plates and Strips of Carbon Structural Steels and High Strength Low Alloy Structural Steels GB/T 5223 Steel Wire for Prestressing of Concrete GB 8076 Concrete Admixtures GB/T 11253 Cold-rolled Sheets and Strips of Carbon Structural Steels GB 13788 Cold Rolled Ribbed Steel Wires and Bars GB/T 14684 Sand for Construction GB/T 14685 Pebble and Crushed Stone for Construction GB/T 15345 Test Methods of Concrete Pipes for Water Transmission GB 50046 Code for Anticorrosion Design of Industrial Constructions GB/T 50081-2002 Standard for Test Method of Mechanical Properties on Ordinary Concrete GB/T 50107 Standard for Inspection and Assessment of Strength of Concrete GB 50119 Code for Utility Technical of Concrete Admixture GB 50204 Code for Quality Acceptance of Concrete Structure Construction GB 50212 Code for Construction of Building Anticorrosive Engineering GB 50224 Code for Acceptance of Construction Quality of Antieorrosive Engineering of Buildings GB 50236 Code for Construction of Field Equipment, Industrial Pipe Welding Engineering GB 50268 Code for Construction and Acceptance of Water and Sewerage Pipeline Works GB 50332-2002 Structural Design Code for Pipelines of Water Supply and Waste Water Engineering DL/T 5017 Specifications for Manufacture Installation and Acceptance of Steel Penstocks in Hydroelectric and Hydraulic Engineering JGJ 55 Specification for Mix Proportion Design of Ordinary Concrete JGJ 63 Standard of Water for Concrete JC/T 748 Rubber Gasket Ring of Prestressed and Self-stressing Concrete Pipe JC/T 749 Rubber Gasket Ring of Prestressed and Self-stressing Concrete Pipe JC/T 1091 The Joint Ring Steel for Prestressed Concrete Cylinder Pipe CECS 140-2011 Specification for Structural Design of Buried Prestressed Concrete Pipeline of Water Supply and Sewerage Engineering CECS 141-2002 Specification for Structural Design of Buried Steel Pipeline of Water Supply and Sewerage Engineering 3 Terms, Definitions and Main Symbols For the purpose of this document, the following terms, definitions and main symbols apply. 3.1 Terms and Definitions 3.1.1 prestressed concrete cylinder pipe; PCCP pipe made by winding prestressed wire in circumferential direction on the concrete pipe core with steel cylinder and adding cement mortar protection layer, including lined prestressed concrete cylinder pipe (PCCPL) and embedded prestressed concrete cylinder pipe (PCCPE) 3.1.2 lined prestressed concrete cylinder pipe; PCCPL pipe made by adding cement mortar protection layer onto the prestressed wire wound circumferentially to the pipe core consisting of concrete lining and steel cylinder 3.1.3 embedded prestressed concrete cylinder pipe; PCCPE pipe made by adding cement mortar protection layer onto the pipe core concrete consisting of steel cylinder and concrete layers on both sides of it with prestressed wire wound in circumferential direction to the outer concrete layer 3.1.4 prestressed concrete cylinder pipe with single gasket prestressed concrete cylinder pipe with the pipe joint connected by single rubber gasket through flexible sealing, including lined prestressed concrete cylinder pipe with single gasket (hereinafter referred to as PCCPSL) and embedded prestressed concrete cylinder pipe with single gasket (hereinafter referred to as PCCPSE) 3.1.5 prestressed concrete cylinder pipe with duo-gaskets prestressed concrete cylinder pipe with the pipe joint connected by two rubber gaskets through flexible sealing, including lined prestressed concrete cylinder pipe with duo-gaskets (hereinafter referred to as PCCPDL) and embedded prestressed concrete cylinder pipe with duo-gaskets (hereinafter referred to as PCCPDE) 3.1.6 fittings pipe fittings made by adopting steel plate as the main structural material, with steel bar (steel wire) mesh reinforced cement mortar added or other anticorrosive material painted on inner or outer side of the steel plate 3.1.7 special pipe nonstandard pipe fittings manufactured by adopting the same technology as that for prestressed concrete cylinder pipe 3.1.8 helical seam welded a kind of cylinder-manufacturing method through welding, by which thin steel plate is wound helically into steel cylinder and automatically welded at the same time, with the weld seam on steel cylinder in helical circumferential seam 3.1.9 splice seam welded a kind of cylinder-manufacturing method through welding, by which thin steel plate is cut by fixed length based on the longitudinal length of steel cylinder, longitudinally welded after plate splicing and finally made into steel cylinder through rolling and welding, with the weld seam on steel cylinder in longitudinal straight seam 3.1.10 working pressure P maximum internal water pressure in certain section of pipeline/ certain pipe generated by hydraulic gradient or hydrostatic pressure specified by the Employer, excluding water hammer pressure 3.1.11 height of fill above top of pipe H distance between the top of embedded pipe and ground surface 3.2 Main symbols D0——the nominal inner diameter of pipe, mm; Dy——the outer diameter of steel cylinder, mm; tc——the pipe core thickness (including steel cylinder thickness ty), mm; ty——the steel cylinder thickness, mm; tg——the protection layer thickness, mm; L0——the effective length of pipe, mm; L——the pipe length, mm; Bb——the inner diameter of socket working face, mm; Bs——the outer diameter of spigot working face, mm; C——the socket depth, mm; E——the spigot length, mm; Pg——the pressure for the anti-seepage inspection of the steel cylinder, MPa; Pt——the internal pressure for crack resistance inspection, MPa; Pc——the load for crack-resistance external pressure inspection, kN/m; Ap——the area of circumferential prestressed steel wire in per meter pipe length, mm2; An——the converted area of pipe core concrete, steel cylinder, steel wire and mortar protection layer on the pipe wall section in per meter pipe length, mm2; σpc——the ultimate effective prestress for circumferential steel wire, N/mm2; ftk——the standard value of tensile strength for pipe core concrete, N/mm2; b——the calculated length of pipe along axial direction, which is 1,000, mm; ro——the calculated radius of pipe wall section, mm; α——the factor controlling mortar crack, which is 1.06 for PCCPE and 0.65 for PCCPL; ωc——the convert coefficient of elastic resisting moment of concrete at tensile edge in pipe wall inner section. 4 Classification 4.1 Product classification Prestressed concrete cylinder pipe (PCCP) is classified into lined prestressed concrete cylinder pipe (PCCPL) and embedded prestressed concrete cylinder pipe (PCCPE) by structure and into prestressed concrete cylinder pipe with single gasket (PCCPSL, PCCPSE) and prestressed concrete cylinder pipe with duo-gaskets (PCCPDL, PCCPDE) by pipe joint sealing type. 4.2 Specifications and dimensions Basic dimensions of prestressed concrete cylinder pipe shall be in accordance with those specified in Tables1, 2 and 3 respectively; structure form of prestressed concrete cylinder pipe shall be in accordance with those specified in Figures 1, 2 and 3 respectively; shape and dimension of steel loop of pipe socket and spigot joints shall be in accordance with those specified in Table 4 and Figure 3. Note: pipes of other specifications and dimensions may be produced, based on the agreement of both the supplier and the purchaser.

Contents of GB/T 19685-2017

Foreword i 1 Scope 2 Normative References 3 Terms, Definitions and Main Symbols 4 Classification 5 Raw and Auxiliary Material 6 Technical Requirements for Pipe Manufacture 7 Pipe Fittings 8 Test Method 9 Inspection Rule 10 Marking, Transport and Storage 11 Application Requirements 12 Certificate of Merchandise Annex A (Normative) Crack Resistance Inspection Pressure (Pt) Figure 1 Schematic Diagram for Lined Prestressed Concrete Cylinder Pipe (PCCPL) Figure 2 Schematic Diagram for Embedded Prestressed Concrete Cylinder Pipe (PCCPE) Figure 3 Detail Drawing for the Section of Joint Steel Ring Table 1 Basic Dimensions of Lined Prestressed Concrete Cylinder Pipe (PCCPSL, PCCPDL) Table 2 Basic Dimension of Embedded Prestressed Concrete Cylinder Pipe (PCCPSE) Table 3 Basic Dimension of Embedded Prestressed Concrete Cylinder Pipe (PCCPDE) Table 4 Dimensions of Socket and Spigot Steel Ring Table 5 Permissible Deviation for Finished Pipes Table 6 Permissible Relative Rotation Angle of Joints Table 7 Minimum Thickness of the Steel Plates Used for Fittings Table 8 Sampling Quantity of End-of-manufacturing Inspection Table 9 Sampling Quantity of Type Inspection Table 10 Permissible Stacking Layer Numbers of Finished Pipe