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GB/T 35451.2-2018 English PDF

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GB/T 35451.2-2018: Polypropylene (PP) structure-wall piping systems for underground drainage and sewerage -- Part 2: Polypropylene spirally enwound structure-wall pipes
Status: Valid
Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
GB/T 35451.2-2018599 Add to Cart 5 days Polypropylene (PP) structure-wall piping systems for underground drainage and sewerage -- Part 2: Polypropylene spirally enwound structure-wall pipes Valid

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Basic data

Standard ID: GB/T 35451.2-2018 (GB/T35451.2-2018)
Description (Translated English): Polypropylene (PP) structure-wall piping systems for underground drainage and sewerage -- Part 2: Polypropylene spirally enwound structure-wall pipes
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: G33
Classification of International Standard: 83.140.30
Word Count Estimation: 30,326
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 35451.2-2018: Polypropylene (PP) structure-wall piping systems for underground drainage and sewerage -- Part 2: Polypropylene spirally enwound structure-wall pipes


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Polypropylene(PP) structure--wall piping systems for underground drainage and sewerage--Part 2. Polypropylene spirally enwound structure--wall pipes ICS 83.140.30 G33 National Standards of People's Republic of China Polypropylene (PP) structural wall pipe for buried drainage and sewage System Part 2. Polypropylene wound structural wall pipe sewerage-Part 2. Polypropylenespiralyenwoundstructure-walpipes Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and definitions, symbols and abbreviations 1 4 Material 3 5 Pipe Classification 5 6 Structure type and connection method 5 7 Requirements 7 8 Test method 11 9 Inspection rules 13 10 Marking, transport and storage 15 Appendix A (informative) Polypropylene (PP) material properties 16 Appendix B (informative) Pipe fitting performance and typical structure 17 Appendix C (Normative) Tensile force at the weld and the tensile force test of the welded or welded joints Appendix D (Normative) Sealing test method for elastomeric sealing joints 21 Reference 27

Foreword

GB/T 35451 "Polypropylene (PP) structural wall pipe system for buried drainage and sewage disposal" is divided into two parts. ---Part 1. Polypropylene double wall corrugated pipe; --- Part 2. Polypropylene winding structural wall pipe. This part is the second part of GB/T 35451. This part is drafted in accordance with the rules given in GB/T 1.1-2009. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This part was proposed by the China Light Industry Federation. This part is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC48). This section drafted by. Asia University Group, Fujian Nachuan Pipe Industry Technology Co., Ltd., Yonggao Co., Ltd., Hangzhou Unicom Industry Co., Ltd., Hebei Yourong Pipe Industry Co., Ltd., Guangdong Baoku Intelligent Pipe Network System Co., Ltd., Gudi Technology Co., Ltd., Jiangsu River Majing Co., Ltd., Hongsheng Plastic (Hangzhou) Co., Ltd. The main drafters of this section. Li Yu, Wei Zuoyou, Huang Jian, Chen Yiming, Niu Jianying, Si Yuan, Li Xianmei, Zhou Minwei, Chen Xiaolin, Yu Shichao. Polypropylene (PP) structural wall pipe for buried drainage and sewage System Part 2. Polypropylene wound structural wall pipe

1 Scope

This part of GB/T 35451 specifies the polypropylene (PP) wound structural wall pipe (hereinafter referred to as "pipe") for buried drainage and sewage. And definitions, symbols and abbreviations, materials, pipe classification, structural types and connections, requirements, test methods, inspection rules and signs, transport And storage. This section is applicable to polypropylene (PP) resin as the main raw material, and polymer material (usually polypropylene) as the auxiliary support structure. Structural wall pipe and pipe fittings (or solid wall pipe fittings) which are formed by winding and forming. This section is applicable to polypropylene winding structural wall pipe systems for non-pressure buried drainage and sewage drainage with long-term use temperature not exceeding 45 °C. test After considering the chemical resistance and temperature resistance of the material, it can also be used for the underground drainage drainage pipe without pressure.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Plastics -- Determination of density of non-foam plastics -- Part 1 . Dipping method, liquid pycnometer method and titration method Plastics -- Determination of tensile properties of plastics - Part 2. Test conditions for moulding and extruded plastics GB/T 2828.1-2012.Sampling procedures for counting sampling - Part 1. Quantitative inspection by batches plan GB/T 2918-1998 Standard environment for conditioning and testing of plastic specimens GB/T 3682-2018 (all parts) Plastic thermoplastic melt mass flow rate (MFR) and melt volume flow rate Rate (MVR) determination GB/T 6111-2018 Determination of internal pressure resistance of thermoplastic piping systems for fluid transport GB/T 6671-2001 Determination of longitudinal shrinkage of thermoplastic pipes Plastics -- Determination of tensile properties of thermoplastic pipes - Part 3. Polyolefin pipes GB/T 8806-2008 Determination of dimensions of plastic parts for plastics piping systems GB/T 9341-2008 Determination of bending properties of plastics GB/T 9345.1-2008 Determination of ash - Part 1. General method GB/T 9647-2015 Determination of the stiffness of thermoplastic pipe rings GB/T 14152-2001 Test method for resistance to external impact of thermoplastic pipes - GB/T 18042-2000 Test method for creep ratio of thermoplastic pipes GB/T 19278-2018 General terms and definitions for thermoplastic pipes, fittings and valves GB/T 19466.6-2009 Plastic Differential Scanning Calorimetry (DSC) Part 6. Oxidation induction time (isothermal OIT) and oxygen Determination of induced temperature (dynamic OIT) GB/T 21873-2008 Specification for interface seals for rubber seals, drains and sewers 3 Terms and definitions, symbols and abbreviations 3.1 Terms and definitions The following terms and definitions as defined in GB/T 19278-2018 apply to this document. 3.1.1 Winding structural wall pipe spiralyenwoundstructured-walpipes Structural wall tubing made by a winding process. Note. The wall structure made by different winding processes is different. For example. A-type structural wall tube (shown in Figure 2), B-type structural wall tube (shown in Figure 3) is usually preheated The monolithic core mold is wound and the inner wall is smooth. 3.1.2 Fitting fitting Articles made by secondary processing of thermoformed parts and/or several pipe sections (which can be used with solid walled tubes). 3.1.3 Nominal size DN/ID nominalsizeDN/ID DN/ID The nominal size associated with the inner diameter. 3.1.4 Any point outside diameter outsidediameter(atanypoint) De The outer diameter measured by the cross section of any point of the pipe. Note. For structural wall tubing, the outer contour of the cross section may not be circular (eg spiral wound tubes) or circular of equivalent size (eg double wall corrugations) Tube or structural wall tube with ring ribs), where the outer diameter of the tube is theoretically defined as the smallest cylindrical surface that can accommodate the tube body (excluding the socket) path. For ease of use, it can also be technically defined as the sum of the inner diameter and the double structural height. 3.1.5 Any point inside diameter insidediameter(atanypoint) Di The distance between the line passing the center of the circle and the two intersections of the inner surface of the section in the cross section perpendicular to the axial direction of the pipe member. 3.1.6 Mean inner diameter meininsidediameter Dim The arithmetic mean of two or more inner diameter measurements that are perpendicular to each other on the same section. 3.1.7 Any point wall thickness walthickness (atanypoint) The distance between the inner and outer walls at any point on the pipe or fitting. Note. For multi-layer tubes or structural wall tubes, the wall thickness of each layer or different parts may have different design values, and the qualifiers may be added to clarify the position of the measurement. Such as the overall wall thickness, inner wall thickness, outer wall thickness, core wall thickness, reinforcement layer wall thickness and so on. 3.1.8 Structure height constructionheight Ec The radial distance between the inner and outer surfaces of the pipe wall (A-shaped structural wall pipe), or between the inner surface of the pipe wall and the top end of the rib (B-shaped structural wall pipe). 3.1.9 Inner wall thickness walthicknessoftheinsidelayer E4 The wall of the B-shaped pipe has a wall thickness at any point between the ring ribs. 3.1.10 Wall thickness under the inner wall thickness walthicknessoftheinsidelayerunderaholowsection E5 The wall thickness between the inner wall and the inner surface below the cavity portion of the A-type pipe. 3.1.11 Nominal ring stiffness SN The nominal value of the ring stiffness, usually a convenient round integer, represents the minimum specified value of the ring stiffness. [GB/T 19278-2018, definition 2.4.3] 3.2 symbol The following symbols apply to this document. A joint length, or the maximum draw length in the sealed state Di socket diameter Dim,min minimum average inner diameter of the socket De OD Dem average outer diameter Di inner diameter Dim average inner diameter e pipe wall thickness (excluding structural height) Ec structure height E1 socket wall thickness E2 wall thickness E3 wall thickness at the seal ring groove E4 inner wall thickness E5 inner wall thickness under the cavity part F The distance between the end of the socket and the effective solder joint L pipe effective length L1,min minimum fusion length of fused connection Design length of Z1 pipe fittings Design length of Z2 pipe fittings Design length of Z3 pipe fittings ρ density 3.3 Abbreviations The following abbreviations apply to this document. MFR melt mass flow rate (meltmass-flowrate) OIT oxidation induction time (oxidationinductiontime) PP polypropylene SN nominal ring stiffness (nominalringstiffness) TIR real impact rate (trueimpactrate)

4 materials

4.1 Raw materials The raw material is mainly a copolymerized polypropylene (PP-B) base resin, and only additives necessary for improving the properties thereof can be added. Polypropylene tree The lipid content (mass fraction) should be above 95%. 4.2 Material properties The raw materials should meet the requirements of Table 1. For other requirements, see Appendix A. Table 1 Raw material properties Serial number item Claim Basic resin material Test parameter test method 1 Density ρ/(kg/m3) 895 ≤ ρ ≤ 915 ≤ ≤ ≤ ≤ ≤ test temperature 23 ° C GB/T 1033.1-2008, Method A 2 Ash/% ≤1.0 ≤3.0 Test temperature (850±50)°C GB/T 9345.1-2008 3 Flexural modulus/MPa ≥ 1500 ≥ 1500 Test temperature 23 ° C GB/T 9341-2008 4 Tensile strength/MPa ≥ 25 ≥ 25 - - GB/T 1040.2-2006 Hydrostatic strength a (80 ° C, 140 h) No damage, no leakage Test temperature ring Force test time 80 ° C 4.2MPa 140h GB/T 6111-2018 Type A sealing joint Hydrostatic strength a (95 ° C, 1000 h) No damage, no leakage Test temperature ring Force test time 95 ° C 2.5MPa 1000h GB/T 6111-2018 Type A sealing joint Melt mass flow rate / (g/10min) ≤1.5 ≤1.5 Test temperature Load quality 230 ° C 2.16kg GB/T 3682-2018 (all parts) 8 Oxidation induction time/min ≥ 20 ≥ 20 Test temperature.200 ° C GB/T 19466.6-2009 Note. According to different materials and ring stiffness, the flexural modulus is generally between 1500MPa and 1900MPa. a Should be tested with solid wall tubes made of the same material. 4.3 Melt mass flow rate classification The melt mass flow rate of the pipe material used for electrofusion welding or extrusion welding is graded as follows. ---A grade. MFR ≤ 0.3g/10min; ---B grade. 0.3g/10min \u003cMFR≤0.6g/10min; ---C grade. 0.6g/10min \u003cMFR≤0.9g/10min; ---D level. 0.9g/10min \u003cMFR≤1.5g/10min。 The manufactured pipe can be subjected to electrofusion welding or extrusion welding only when the raw material melt mass flow rate (MFR) levels are the same or adjacent. connection. 4.4 Recycling materials Only the cleaning materials used from the pipes and fittings that meet the requirements of this part of the factory are allowed to be used. Recycled material addition amount (mass point The number should not exceed 5%. External recycled materials and recycled materials should not be used. 4.5 elastic sealing ring The elastic sealing ring should meet the requirements of GB/T 21873-2008. Note. If a seal ring assembly is required, the components can be made of a polyolefin material.

5 pipe classification

Pipes can be divided into 6 grades according to the nominal ring stiffness, see Table 2. Table 2 Nominal ring stiffness rating Level SN2a SN4 SN6.3 SN8 SN12.5 SN16 Nominal ring stiffness/(kN/m2) 2 4 6.3 8 12.5 16 a Only for pipes with DN/ID ≥ 500mm.

6 Structure type and connection method

6.1 Structural form of pipe 6.1.1 Type A structural wall tube a flat inner and outer surface with a spiral cavity structure separated by continuous threaded ribs between the inner and outer walls (a typical schematic view is shown in Figure 1); or A spiral hollow tubular structure is embedded between the inner and outer walls (a typical schematic view is shown in Fig. 2). A typical A-shaped structural wall tube is shown in Figure 1 and Figure 2. Figure 1 Schematic diagram of a typical A-type structural wall tube I a) A-tube with hollow structure b) A-tube with multi-layer hollow structure Note. The hollow tube of the A-type structural wall tube can be a plurality of layers. Figure 2 Schematic diagram of a typical A-type structural wall tube II 6.1.2 B-type structural wall tube The inner surface is smooth, and the outer surface is a spiral hollow rib tube, and the socket of the pipe should be wound once. Typical B-shaped structural wall The tube is shown in Figure 3. a) Typical B-type structural wall tube schematic I b) Typical B-type structural wall tube schematic II Description. 1---support structure. Note. The hollow tube of the part B4 of the B-type structural wall tube may be a plurality of layers. Figure 3 Schematic diagram of a typical B-type structural wall tube 6.2 Pipe fittings The pipe fittings are made by secondary processing of pipes or solid wall pipes complying with the requirements of this part, including elbows, tees and pipe plugs of various connection methods. Wait. See Appendix B for typical pipe performance and schematics. 6.3 Typical Connection Method The pipe can be connected by elastic sealing ring, socket welding or extrusion welding. Other connections are also available the way. The elastic sealing ring connection is shown in Figure 4. a) Typical elastic seal connection diagram I Figure 4 Typical elastic sealing ring connection diagram b) Typical elastic seal connection diagram II Figure 4 (continued) The connection method of the socket fused welding is shown in Figure 5. Figure 5 Schematic diagram of typical socket fused welding connection The extrusion welding connection is shown in Figure 6. Figure 6 Typical extrusion welding connection diagram

7 requirements

7.1 color The color of the pipe is generally gray, and other colors are agreed upon by the supplier and the buyer. The surface color of the pipe should be uniform. 7.2 Appearance The inner and outer surfaces of the A-type structural wall pipe shall be flat, and the inner surface of the B-type structural wall pipe shall be smooth and shall not be uneven. Pipe outer surface or outside The ribs should be regular. The inner and outer walls should be free of air bubbles and visible impurities, and the joints are not disengaged. The end face after pipe cutting should be trimmed without burrs. 7.3 Geometric dimensions 7.3.1 Length The effective length (L) of the pipe is generally 6m, and other lengths are agreed upon by the supplier and the buyer. The length is not allowed to have a negative deviation. 7.3.2 Inner diameter and wall thickness The minimum average inner diameter of the A and B pipes is dim,min, and the minimum inner wall thickness e5,min under the cavity portion of the A-shaped pipe (see Figure 1, Figure 2), B The minimum inner wall thickness e4,min (see Figure 3) and the minimum joint length Amin (see Figure 4) of the pipe shall comply with the requirements of Table 3. Electric fusion The welding length (L1) should not be less than 45mm. Table 3 Inner diameter, wall thickness and joint length are in millimeters Nominal size DN/ID Minimum average inner diameter Dim,min Wall thickness Type A E5,min Type B E4,min Minimum joint length a Amin 200 195 1.1 1.5 54 300 294 1.7 2.0 64 400 392 2.3 2.5 74 500 490 3.0 3.0 85 600 588 3.5 3.5 96 800 785 4.5 4.5 118 1000 985 5.0 5.0 140 1200 1185 5.0 5.0 162 1300 1285 5.0 6.5 - 1400 1385 5.0 7.0 - 1500 1485 5.0 7.5 - 1600 1585 5.0 8.0 - 1700 1685 5.0 8.5 - 1800 1785 5.0 9.0 - 1900 1885 5.0 9.5 - 2000 1985 5.0 10.0 - 2100 2085 5.0 10.0 - 2200 2185 5.0 10.0 - 2300 2285 5.0 10.0 - 2400 2385 5.0 10.0 - 2500 2485 5.0 10.0 - 2600 2585 5.0 10.0 - 2700 2685 5.0 10.0 - 2800 2785 5.0 10.0 - 2900 2885 5.0 10.0 - 3000 2985 5.0 10.0 - 3100 2085 5.0 10.0 - 3200 3185 5.0 10.0 - Table 3 (continued) Unit is mm Nominal size DN/ID Minimum average inner diameter Dim,min Wall thickness Type A E5,min Type B E4,min Minimum joint length a Amin 3300 3285 5.0 10.0 - 3400 3385 5.0 10.0 - 3500 3485 5.0 10.0 - 3600 3585 5.0 10.0 - a When DN/ID ≥ 600, the minimum joint length can be less than the requirements in Table 3, but the minimum should not be less than 85mm, and the “short socket” is marked on the pipe. 7.3.3 Wall thickness of socket and socket In the case of a pipe with a solid wall socket and/or a socket, the wall thicknesses e1, min, e2, min and e3, min shall comply with the requirements of Table 4. Table 4 The minimum wall thickness of the solid wall socket and socket is in millimeters Nominal size DN/ID Minimum socket wall thickness E1,min Minimum socket wall thickness E2,min Minimum wall thickness at the seal E3,min DN/ID ≤ 500 de/41, and ≥ 3.4 (de/41) × 0.9 (de/41) × 0.75 DN/ID >500 12.2 10.4 9.2 7.4 Physical properties The physical properties of the pipe shall comply with the requirements of Table 5. Table 5 Physical properties of pipes Serial number project requirements test parameter test method 1 Density ρ/(kg/m2) 895≤ρ≤920 Test temperature 23°C See 8.4 2 Ash /% ≤3 Test temperature (850±50) °C See 8.5 3 Oxidation induction time/min ≥ 20 Test temperature.200 ° C See 8.6 4 Longitudinal retraction rate a/% ≤2, no delamination, no cracking test temperature (150±2) °C See 8.7 5 Oven test b No delamination at the weld, no crack test temperature (150 ± 2) °C See 8.8 a Only for Type A tubing. b For B-type pipes only. 7.5 Mechanical properties The mechanical properties of the pipe shall comply with the requirements of Table 6. Table 6 Mechanical properties of pipes Serial number project requirements test parameter test method Ring stiffness / (kN/m2) SN2 SN4 SN6.3 SN8 SN12.5 SN16 ≥2 ≥4 ≥6.3 ≥8 ≥12.5 ≥16 - See 8.9 2 Impact performance /% TIR≤10 - See 8.10

3 ring flexibility

The sample has no delamination, no reverse bending, no cracking, and the sample is along the rib. The tear length at the beginning of the cut should be less than 0.075 DN/ID Or 75mm (take smaller value) 30% of deformation, see 8.11 4 Creep ratio /% ≤ 4 - - See 8.12 5 Tensile force at the weld joint/N DN/ID< 400mm 400mm≤DN/ID< 600mm 600mm≤DN/ID< 800mm 800mm≤DN/ID< 2000mm 2000mm≤DN/ID< 2500mm DN/......
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