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Basic data
| Standard ID | GB/T 13663.3-2018 (GB/T13663.3-2018) |
| Description (Translated English) | Polyethylene (PE) piping systems for water supply -- Part 3: Fittings |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | G33 |
| Classification of International Standard | 83.140.30 |
| Word Count Estimation | 42,465 |
| Date of Issue | 2018-03-15 |
| Date of Implementation | 2018-10-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 13663.3-2018: Polyethylene (PE) piping systems for water supply -- Part 3: Fittings
---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.
Polyethylene(PE)piping systems for water supply--Part 3. Fittings
ICS 83.140.30
G33
National Standards of People's Republic of China
Replace GB/T 13663.2-2005
Water supply polyethylene (PE) piping system
Part 3. Pipe fittings
(ISO 4427-3.2007, Plasticspipingsystems-Polyethylene(PE) pipesand
fittingsforwatersupply-Part 3. Fittings, MOD)
Published on.2018-03-15
2018-10-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Content
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions, symbols, abbreviations 2
4 Material 3
5 Product Categories 4
6 Requirements 4
7 Test method 14
8 Inspection rules 16
9 logo 18
10 Packaging, transportation and storage 19
Appendix A (informative) Structural changes in this section compared to ISO 4427-3.2007 20
Appendix B (informative) Technical differences between this part and ISO 4427-3.2007 and their causes 22
Appendix C (Normative Appendix) Construction of welded pipe fittings 24
Appendix D (informative) Schematic diagram of typical terminal of electrofusion fittings 29
Appendix E (Normative) Hot-melt socket fittings 30
Appendix F (Normative) Test method for fusion strength of fused saddle fittings 32
Reference 37
Foreword
GB/T 13663 "Polyethylene (PE) Piping System for Water Supply" is divided into five parts.
--- Part 1. General;
--- Part 2. Pipe;
---Part 3. Pipe fittings;
--- Part 4. Valves;
--- Part 5. System suitability.
This part is the third part of GB/T 13663.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This part replaces GB/T 13663.2-2005 "Polyethylene (PE) piping system for water supply Part 2. Pipe fittings", and
Compared with GB/T 13663.2-2005, the main technical changes are as follows.
---The standard number was changed from GB/T 13663.2 to GB/T 13663.3 (see the cover of this section);
--- Increased the maximum working pressure is not more than 2.0MPa requirements, increased the note related to the reference working temperature and the purchaser (this department
Chapter 1);
--- Add and delete related terms, definitions, symbols and abbreviations and their contents, and move them into GB/T 13663.1-2017 (Chapter 3 of this part);
--- Removed PE63 grade materials and requirements; removed the basic performance requirements of materials, adjusted to GB/T 13663.1-2017
Expression (Chapter 4 of this Part);
---Modified the classification and naming related content of polyethylene compounding, deleted the PE63 grade material, and increased the mixing time of 80 °C.
The static hydrostatic strength curve is not allowed to have an inflection point before 5000h (t< 5000h) (this part 4.2)
--- Added requirements for other materials (this section 4.3.4);
--- Increased reclaimed material requirements (this section 4.4);
---Modified product classification requirements (Chapter 5 of this section);
--- Increased the requirements for the construction of welded pipe fittings; blue polyethylene pipe fittings should avoid direct exposure to ultraviolet light and be modified to blue
Color fittings are only suitable for dark coatings (section 6.2);
--- Added requirements for pipe design, factory prefabricated joints and electrical protection (this section 6.3);
--- Revised the range of resistance values of the electrofusion tube. nominal value × (1 ± 10%) (this section 6.4);
--- Increased the size range (this section 6.5.1, 6.5.2 and 6.5.7);
--- Removed the average outer diameter grade A and special tubular length requirements for the pipe socket end dimensions (this section 6.5.1);
--- Increased the average inner diameter of the fused socket end (this part 6.5.2.1);
--- Increased the requirements for the construction of welded pipe fittings (this section 6.5.5);
--- Increased the requirements for mechanical connection pipe fittings (this section 6.5.6);
--- Mechanical and physical properties of pipe fittings removed the relevant requirements for pipe fittings made of PE63 material; hydrostatic strength (20 ° C, 100 h)
Test parameters. PE100 ring stress is changed from 12.4MPa to 12.0MPa; the welding strength requirement of fused saddle pipe fittings is increased;
Increased the requirement of ash ≤0.1%; adjust the oxidation induction time of the pipe from "200 °C, ≥20min" to "210°C,
≥20min" (this section 6.6 and 6.7);
--- Revised the relevant requirements of the test method (Chapter 7 of this part);
--- Increased welding strength arbitration method for 90mm~225mm fused socket fittings (this section 7.6);
--- Increased ash test method requirements (see 7.16 in this section);
---Modified the batch batch and grouping requirements (section 8.2);
--- Added list of inspection items and hygiene inspection requirements (in Section 8.3.1);
--- In the sampling plan, the acceptance quality limit (AQL) is adjusted from 6.5 to 4.0 (this part 8.3.2);
--- Type inspection increases the requirement for type inspection every three years (8.4.4 of this section);
--- The mark content of the dn ≥ 280mm pipe fittings has been deleted, and the mixed batch number and production batch number have been added (this part 9.2);
--- Increased packaging requirements (this section 10.1);
--- Added the normative appendix "Construction Welded Pipe Fittings" (Appendix C to this section);
--- Deleted the typical C-type connector (Appendix D in this section) in the informative appendix "Schematic terminal diagram of electrofusion fittings";
--- Added the normative appendix "Hot-melt socket fittings" (Appendix E of this section);
--- Added the normative appendix "Test Method for Welding Strength of Fused Saddle Pipe Fittings" (Appendix F of this section).
This section uses the redrafting method to modify the use of ISO 4427-3.2007 "plastic pipe system for water supply polyethylene (PE) pipe and pipe
Part 3. Pipe fittings.
This section has more structural adjustments than ISO 4427-3.2007. The section numbers in this section are listed in Appendix A.
A comparison list of chapter numbers for ISO 4427-3.2007.
This section has technical differences compared to ISO 4427-3.2007. The terms involved in these differences have been passed through the margins on their outer margins
The vertical single line (—) is marked. A list of relevant technical differences and their causes is given in Appendix B.
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 National Light Industry Council.
This part is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC48).
This section drafted by. Asia University Group, Guangdong Liansu Technology Industrial Co., Ltd., Yonggao Co., Ltd., Zhangzhou Pearl Plastics
Co., Ltd., Ningbo Yuhua Electric Co., Ltd., Zibo Jielin Plastic Pipe Co., Ltd., Shandong Shengbang Plastic Co., Ltd., Guizhou Senrui
New Materials Co., Ltd., Jilin Songjiang Plastic Pipeline Equipment Co., Ltd., Fujian Yatong New Material Technology Co., Ltd., Hubei
Jinniu Pipe Industry Co., Ltd., Zhejiang Zhongyuan Maple Leaf Pipe Co., Ltd.
The main drafters of this section. Wang Zhiwei, Song Keming, Huang Jian, Chi Yongsheng, Li Weifu, Xue Yanchao, Jing Fazhen, Li Wenquan, Wang Yurong,
Peng Fudi, Dong Bobo, Yang Kejie, Li Yu, Yan Peigang.
The previous versions of the standards replaced by this section are.
---GB/T 13663.2-2005.
Water supply polyethylene (PE) piping system
Part 3. Pipe fittings
1 Scope
This part of GB/T 13663 stipulates the use of polyethylene (PE) compound as raw material, injection molding or other forms of water for the use of polyethylene
Terms and definitions, symbols, abbreviations, materials, product classifications, requirements, test methods, inspection rules, signs of olefin fittings (hereinafter referred to as "pipe fittings")
And packaging, transportation, storage.
This part, together with other parts of GB/T 13663, applies to water temperatures not exceeding 40 ° C, maximum working pressure (MOP) is not greater than
2.0 MPa, polyethylene pipe system and its components for general purpose pressure water delivery and drinking water distribution.
Note 1. The reference operating temperature is 20 °C. For the pressure reduction factor between 0 °C and 40 °C, refer to Appendix C of GB/T 13663.1-2017.
Note 2. It is the responsibility of the purchaser to properly select the products specified in this section according to their specific application requirements, in conjunction with relevant regulations, standards or specifications.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 2828.1. Sampling and sampling procedures - Part 1 . Batch-to-batch sampling plan searched by the acceptance quality limit (AQL)
(GB/T 2828.1-2012, ISO 2859-1..1999, IDT)
GB/T 2918 Standard environment for conditioning and testing of plastic samples (GB/T 2918-1998, idtISO 291.1997)
GB/T 3682-2000 Determination of mass flow rate and melt volume flow rate of melts - Part 1 . Standard
Method (idtISO 1133.1997)
GB/T 4217 Nominal outer diameter and nominal pressure of thermoplastic pipes for fluid transfer (GB/T 4217-2008, ISO 161-1.
1996, IDT)
GB/T 6111-2018 Determination of internal pressure resistance of thermoplastic piping systems for fluid transport (ISO 1167-1.2006,
ISO 1167-2.2006, ISO 1167-3.2007, ISO 1167-4.2007, NEQ)
GB/T 7306.1-2000 55° sealing pipe threads - Part 1. Internal and external taper threads (eqv ISO 7-1.1994)
GB/T 7306.2-2000 55 ° sealed pipe thread - Part 2. taper and taper ( eqv ISO 7-1.1994)
GB/T 8163-2008 Seamless steel pipe for conveying fluid
GB/T 8806-2008 Determination of dimensions of plastic parts for plastics piping systems (ISO 3126.2005, IDT)
GB/T 9345.1-2008 Determination of ash - Part 1. General method (ISO 3451-1..1997, IDT)
GB/T 10798 Thermoplastic plastic pipe universal wall thickness gauge (GB/T 10798-2001, idtISO 4065.1996)
GB/T 13663.1-2017 Polyethylene (PE) piping systems for water supply - Part 1. General (ISO 4427-1.2007, MOD)
GB/T 13663.2-2018 Polyethylene (PE) piping systems for water supply - Part 2. Pipes (ISO 4427-2.2007, MOD)
GB/T 13663.5-2018 Polyethylene (PE) piping systems for water supply - Part 5. System suitability (ISO 4427-5.2007,
MOD)
GB/T 15820-1995 Tensile test for connection of polyethylene pressure pipe to pipe fittings (eqvISO 3501.1976)
GB/T 17219 Safety evaluation criteria for drinking water distribution equipment and protective materials
GB/T 18252 Plastic piping system uses extrapolation method to determine the long-term hydrostatic strength of thermoplastic materials in the form of pipes
(GB/T 18252-2008, ISO 9080.2003, IDT)
GB/T 18475 Thermoplastic pressure pipes and fittings for material grading and naming overall use (design) factor
(GB/T 18475-2001, eqvISO 12162..1995)
GB/T 19278-2003 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 the induced temperature (dynamic OIT) (ISO 11357-6.2008, MOD)
GB/T 19712-2005 Polyethylene (PE) saddle bypass impact test method for plastic pipes and fittings (ISO 13957.1997,
IDT)
GB/T 19806-2005 Extrusion and peeling test of polyethylene electrofusion components for plastic pipes and fittings (ISO 13955.1997, IDT)
GB/T 19808-2005 Extension and stripping of polyethylene electrofusion components with a nominal outer diameter greater than or equal to 90 mm for plastic pipes and fittings
Off test (ISO 13954.1997, IDT)
GB/T 19809-2005 Preparation of hot-melt butt joints for plastic pipes and fittings, polyethylene (PE) pipes/fittings or pipes/fittings
(ISO 11414.1996, IDT)
GB/T 19810-2005 Determination of tensile strength and failure forms of hot-melt butt joints of polyethylene (PE) pipes and fittings (ISO
13953.2001, IDT)
GB/T 20674.1-2006 Plastics pipes and fittings - Polyethylene systems - Part 1 . Hot-melt joints (ISO 12176-
1.1998, MOD)
GB/T 21873-2008 Specification for interface seals for rubber seals, drains and sewers (ISO 4633.
2002, MOD)
3 Terms and definitions, symbols, abbreviations
Terms and definitions, symbols, abbreviations defined in GB/T 13663.1-2017, GB/T 13663.5-2018, GB/T 19278-2003
And the following terms and definitions apply to this document.
3.1
Nominal outer diameter nominaloutsidediameter
Dn
The specified value of the outer diameter of the pipe or fitting socket.
Note. The nominal diameter of the fitting that matches the outer diameter of the pipe is also indicated by the nominal outside diameter of the pipe.
3.2
Electrofusion socket pipe fittings electrofusionsocketfitting
a socket having one or more inner walls integrated with a heating element capable of converting electrical energy into heat energy and melting the end of the pipe or fitting
Connected polyethylene pipe fittings.
3.3
Fused saddle fittings electrofusionsaddlefitting
With saddle geometry and one or more integrated heating elements, capable of converting electrical energy into heat to achieve melting on the outer wall of the tube
Connected polyethylene pipe fittings.
3.4
Saddle-shaped bypass tappinge
An fused saddle fitting (top loading or wrapping) with an auxiliary opening branch end and a combined cutter that cuts through the walls of the main wall. in
The cutter remains in the saddle after installation. Often used for pressurized work.
Note. The saddle bypass is also known as the saddle tee and can be loaded from the top during welding or tightened around the upper surface of the saddle.
3.5
Saddle straight through branchsaddle
An fused saddle fitting that does not have an auxiliary opening branch end and usually requires an auxiliary cutting tool to drill a hole in the connected main pipe.
Note. Saddle straight is also known as a branch saddle. It can be loaded from the top during welding or fastened around the upper surface of the saddle.
3.6
Spudendend fitting with socket end fittings
Pipe fittings with socket ends. The socket end is matched with the socket, and the connecting outer diameter is equal to the branch end of the pipe nominal diameter dn.
Note. The socket end can also be welded to the pipe or fitting socket of the same specification.
3.7
Hot melt socket tube socketfusionfitting
A polyethylene pipe member having a socket structure and thermally joined to a pipe or pipe socket end by a heating tool.
3.8
Construction of welded pipe fittings fabricatedfitting
Manufactured from secondary and/or group welded pipes conforming to GB/T 13663.2-2018 and/or injection molded fittings complying with this standard
Pipe fittings.
3.9
Maximum out-of-roundness of electrofusion sockets maximumout-of-roundnessofelectrofusionsocket
The maximum value of the unroundness of the socket between the plane of the mouth opening and the plane from the mouth of the socket to the distance L21 (the length of the design insertion section).
Note. Rewrite GB/T 19278-2003, definition 3.15.
3.10
Mechanical connection type pipe fitting mechanicalfitting
A pipe that mechanically joins a polyethylene pipe to other pipe components.
Note 1. It can generally be assembled at the construction site or pre-installed by the manufacturer at the factory. Usually has a compression part to provide pressure resistance, sealing and end load resistance
Ability. The polyethylene sleeve is permanently supported by a support sleeve inserted into the interior of the nozzle to prevent the wall from creeping under radial pressure.
Note 2. The metal part of the pipe fitting can be connected to the metal pipe by means of a thread, a compression joint, a weld or a flange (including a polyethylene flange). Mechanical connection pipe fittings
Can form a detachable or permanently assembled joint. In some cases, the support sleeve can also function as a clamping ring.
3.11
Voltage regulation
In the welding process of the electrofusion tube, the way of energy supply is controlled by voltage parameters.
3.12
Current regulation
In the welding process of the electrofusion tube, the way of the energy supply is controlled by the current parameter.
4 materials
4.1 Polyethylene compounding
Production pipe fittings should use PE80 or PE100 grade compounding, and the mixing ingredients should meet the requirements of GB/T 13663.1-2017.
4.2 Classification and naming of polyethylene blending ingredients
Polyethylene compounding should be graded and named according to the minimum required strength (MRS) specified in GB/T 18475, see Table 1.
The minimum required strength (MRS) is measured in tubing and extrapolated. The long-term hydrostatic strength of the compound should be tested according to GB/T 18252
Degree, the pressure test is carried out at at least three temperatures, two of which are fixed at 20 ° C and 80 ° C, and the third temperature can be at 30 ° C to
Free choice between 70 ° C to determine 20 ° C, 50-year lower confidence limit (σLPL), extrapolate the MRS value from 20 ° C, 50-year lower confidence limit (σLPL).
Note. Internationally, ISO 9080 and ISO 12162 are used to classify and name polyethylene blends. ISO 9080 and ISO 12162 respectively correspond.
GB/T 18252 and GB/T 18475.
The 80°C regression curve is not allowed to appear before 5000h (t< 5000h).
The compounding manufacturer shall provide proof of level conforming to the classification and naming in Table 1.
Table 1 Classification and naming of polyethylene blending ingredients
Minimum required strength
MPa
Named σLPL (20 ° C, 50 years, 97.5%)
MPa
8.0 PE80 8.0≤σLPL< 10.0
10.0 PE100 10.0 ≤ σLPL < 11.2
4.3 Non-polyethylene parts materials
4.3.1 General requirements
The material of the non-polyethylene component in the pipe fitting shall not adversely affect the cracking of the water quality and the properties of the polyethylene material or cause cracking, and
The overall requirements of the piping system should be met.
4.3.2 Metal materials
All corrosive parts should be adequately protected. The material of the metal part of the pipe should not cause damage to the plastic pipe material during the use of the pipe.
Degradation or aging.
When different metal materials are used in the pipe and may come into contact with moisture, measures should be taken to prevent electrochemical corrosion.
4.3.3 Elastomeric seals
The material used to manufacture the elastic seals shall comply with the requirements of GB/T 21873-2008.
4.3.4 Other materials
The long-term performance and water quality of the pipe material should not be affected. If grease or lubricant is used, it should not seep into the weld zone.
4.4 Recycling materials
Recycled materials and recycled materials should not be used in the production of pipe fittings.
5 Product Categories
5.1 Pipe fitting types include the following four types.
---Splicing connection type pipe fittings;
--- Construction of welded pipe fittings (see Appendix C);
---Mechanical connection type pipe fittings (dn≤63mm);
---Flange connection type pipe fittings.
5.2 Fusion connection Pipe fittings are divided into electrofusion pipe fittings, hot melt butt fittings and hot melt socket fittings.
6 requirements
6.1 Appearance
The inner and outer surfaces of the pipe should be clean and smooth, and there should be no defects such as air bubbles, obvious scratches, dents, impurities, and uneven color.
6.2 color
The tube should be black or blue in color. For the construction of welded pipe fittings, the color of the pipe section used shall comply with GB/T 13663.2-2018
Requirements for pipes.
Blue fittings are only suitable for dark coatings.
6.3 Pipe fitting design
The inner and outer surfaces of the prefabricated joint shall be free of spills, except for spills that the pipe manufacturer declares acceptable or used as a weld sign.
Note. Prefabricated joints are factory prefabricated or assembled fittings.
When the pipe is connected according to the manufacturer's instructions, any melt overflow shall not cause the wire of the electrofusion pipe to move.
As a result of a short circuit, the inner surface of the connecting pipe or socket should not be excessively deformed or wrinkled.
The fittings shall be designed so that the resistance coils and/or seals are not displaced when assembled with the tubing (or other components) as recommended by the manufacturer.
The surface of the terminal should be clean to minimize contact resistance. The electrofusion tube should be designed according to the voltage, current and current characteristics during operation.
Set the appropriate electrical protection measures. For voltages greater than 25V, assemble and weld according to the pipe and equipment manufacturer's instructions.
When making sure that people are not in direct contact with live parts.
6.4 Resistance deviation of electrofusion pipe fittings
The resistance value of the electrofusion tube should be. nominal value × (1 ± 10%). See Appendix D for a schematic diagram of typical terminals for electrofusion fittings.
6.5 Geometric dimensions
6.5.1 Pipe socket end size
The schematic diagram of the end of the pipe socket is shown in Figure 1. Its dimensions are to comply with the requirements of Table 2.
Other standard size ratios (SDR) derived from the tube series (S) specified in GB/T 10798 and GB/T 4217 are permitted.
Description.
D1 --- the average outer diameter of the welded section, measured at any section of the port that is not greater than L12 (tubular length), parallel to the plane of the port;
D2 --- The minimum diameter of the pipe fitting, which does not include the crimping (if any) formed by welding;
E --- the wall thickness of the pipe body, the wall thickness measured at any point on the pipe body;
E1 --- the wall thickness of the welded joint measured at any point not exceeding the L11 (return length) from the insertion port, and should be the same as the wall thickness of the same SDR pipe
The difference is the same, the tolerance should meet the requirements of Table 4 of GB/T 13663.2-2018;
L11---The length of the resection of the welded section, that is, the initial depth of the socket end necessary for hot-melt docking or re-welding. This length allows the wall thickness to be welded
A pipe segment equal to E1 is implemented;
L12—The tubular length of the welded section, that is, the initial length of the welded end. The following various operations (or combination operations) should be met. the installation of the docking fixture, electricity
Assembly of the fuse tube, assembly of the hot melt socket tube and use of a mechanical scraper.
Figure 1 Schematic diagram of the socket end of the pipe
Table 2 Pipe socket end dimensions are in millimeters
Socket nominal
Outer diameter
Fusion end
Average outer diameter a
Electrofusion fusion and hot melt butt fusion welding only for hot melt docking
Out of roundness
Minimum
The way to
Cut back
length
Tubular
Length b
Tubular
length
Out of roundness
Conventional tubular
length
Dn D1,min D1,max max.D2 L11,min L12,min L12,min max.L11,min L12,min
20 20.0 20.3 0.3 13 25 41 11 - - -
25 25.0 25.5 0.4 18 25 41 12.5 - - -
32 32.0 32.3 0.5 25 25 44 14.6 - - -
40 40.0 40.4 0.6 31 25 49 17 - - -
50 50.0 50.4 0.8 39 25 55 20 - - -
63 63.0 63.4 0.9 49 25 63 24 1.5 5 16
75 75.0 75.5 1.2 59 25 70 25 1.6 6 19
90 90.0 90.6 1.4 71 28 79 28 1.8 6 22
110 110.0 110.7 1.7 87 32 82 32 2.2 8 28
125 125.0 125.8 1.9 99 35 87 35 2.5 8 32
140 140.0 140.9 2.1 111 38 92 - 2.8 8 35
160 160.0 161.0 2.4 127 42 98 - 3.2 8 40
180 180.0 181.1 2.7 143 46 105 - 3.6 8 45
200.200.0.201.2 3.0 159 50 112 - 4.0 8 50
225 225.0 226.4 3.4 179 55 120 - 4.5 10 55
250 250.0 251.5 3.8.199 60 129 - 5.0 10 60
280 280.0 281.7 4.2 223 75 139 - 9.8 10 70
315 315.0 316.9 4.8 251 75 150 - 11.1 10 80
355 355.0 357.2 5.4 283 75 164 - 12.5 10 90
400 400.0 402.4 6.0 319 75 179 - 14.0 10 95
450 450.0 452.7 6.8 359 100 195 - 15.6 15 60
500 500.0 503.0 7.5 399 100 212 - 17.5 20 60
560 560.0 563.4 8.4 447 100 235 - 19.6 20 60
630 630.0 633.8 9.5 503 100 255 - 22.1 20 60
710 710.0 714.9 10.6 567 125 280 - 24.8 20 60
800 800.0 805.0 12.0 639 125 280 - 28.0 20 60
a The average outer diameter D1,max of the welded end is given by level B.
b The value of L12 (electrofusion fitting) is based on the following formula.
--- For dn ≤ 90, L12 = 0.6dn 25;
--- For dn ≥ 110, L12 = dn/3...
...
