This standard specifies the product classification, raw materials, product specifications, requirements, test methods, inspection rules and marking, packaging, transportation and storage of ultra-high molecular weight polyethylene (UHMWPE) pipes. This standard applies to extruded pipes (hereinafter referred to as pipes) with ultra-high molecular weight polyethylene as the main raw material and other components added in an amount not exceeding 5%. The pipes specified in this standard are suitable for conveying water, slurry, powder, granular solids, certain corrosive chemical liquids below 45°C and fluids at low temperatures. QB/T 2668-2004 Ultra-high molecular weight polyethylene pipes QB/T2668-2004 Standard download decompression password: www.bzxz.net

ECS 83.140.30
Classification number: G33
Registration number: 15134-2005
Light Industry Standard of the People's Republic of China
QB/T 2668-2004bzxZ.net
Ultra-high-molecular-weight polyethylene (PE-HIMw) pipes2004-12-14 Issued
National Development and Reform Commission of the People's Republic of China Implemented on 2005-06-01
QB/T2668-2004
This standard is formulated based on the production and use needs of ultra-high molecular weight polyethylene pipes, in accordance with the characteristics of ultra-high molecular weight polyethylene pipes, after performance testing and experimental verification, with reference to relevant international standards and domestic standards. Appendix A of this standard is a normative appendix. This standard is proposed by the China Light Industry Federation. This standard is issued by the Technical Committee for Standardization of Plastic Products of Shandong Province (TC4/SC3) of Plastic Pipes, Fittings and Valves. The drafters of this standard are: Jiehe Laoshan Co., Ltd., Institute of Chemistry of the Chinese Academy of Sciences, and Zibo Zhongkemi Pipe Co., Ltd. The drafters of this standard are: Li Shoushan, Guo Jing, Xu Weijie, Fa Xiaoguang, Gan Dejian. This standard is published for the first time.
1 Scope
Ultra-high molecular weight polyethylene pipes
QB/T2668-2004
This standard specifies the product classification, raw materials, production specifications, requirements, test methods, inspection and supervision rules and regulations, packaging, transportation, storage of ultra-high molecular weight polyethylene (LHMWPE) pipes. This standard is used for materials (hereinafter referred to as pipes) that are extruded into a wall with ultra-high molecular weight polyethylene as the main raw material and the addition amount of other components is not more than 5%. The pipes specified in this standard are applicable to the delivery of water, slurry, solid, granular, and fluids with chemical corrosiveness below 45°C and low pressure.
2 Normative reference documents
The following documents are used to describe the provisions of this standard. The standard is a reference document of the H film, and its subsequent amendments (excluding errors) or revisions are not applicable to the standard. However, the parties who do not meet the requirements or are not effective in the use of these parts shall use the standard. For all parts that do not meet the requirements, the standard shall apply. GB/T1443-1993 Test method for simply supported beam impact of high quality plastics (ISO179:1982) GB/T2828.1-2003 Counted sampling inspection procedure Part 1: Batch inspection plan according to acceptance quality limit (AQL) inspection rate (IS0 2859 1:1999, IDT) GB/T 2918-1998 Standard environment for the operation and testing of dense material test batches (IDT 291:199?) GB/T6111-2003 Test method for internal stop of thermoplastic pipes for fluid delivery IDT011:1996 GD/T 6671 2001
GE/T8804.3—2003
Determination of textile shrinkage of thermoplastic materials (EQ1502505:194) Determination of the properties of thermoplastic pipes Part 3: Polyester pipes (IDT8062593:1997)
Methods for measuring the size of plastic materials (G/8806-188cqV1S03126:1974) GD/T8806-1998
GB/T 17219—1998
GB/T [7391-1998
ISO 11542-1:2001
1SQ 11542-2:1998
3 Classification
Standard for the evaluation of the safety characteristics of water supply and distribution equipment and water-proof materials for pipes and fittings [69VTS0/TR10937:1991) Plastics high polymer flat surface (PE-UHMW) molding and technical materials Part 1: Classification system for plastics ultra-high molecular weight polyethylene (PTI-HMW) plastics and extrusion materials Part 2: Test specimen preparation and performance evaluation
Pipes are divided into two categories according to the classification of CHMWPE resins: UHMWPE Class I and LHMWPE Class I. The classification method is shown in Table 1. 1UHMWPE pipe classification: Relative weight: two: 10/10: LHMWPE: 2=100H200LHMWPHQB/T 2668-20044 raw materials: ultra-high density ethylene resin according to the provisions of QB/T 2668-2001, the melt flow rate (MFR, 190℃/21.6k) is less than 0.1/10min and the molecular weight is 4.2. The ethylene pipe material contains necessary additives and the additives are evenly divided into micro-sized ones. 5 Product Specifications
5.1 Relationship between nominal pressure and design stress, standard size ratio of pipes The relationship between nominal pressure () and design stress, standard size ratio () is shown in the formula: PA =
SHH =a./,
The unit is MPa (P:
5.2 Method of expressing pipe specifications
Pipe specifications and nominal outer diameters, ... |Table 2 Nominal outer diameter and nominal pressure of pipes corresponding to nominal wall thickness Nominal size Nominal pressure PN/MPa/mnt/mnt/mnt/mnt Standard size ratio 3/3/4 MPa/mnt/mnt/mnt/mnt Standard size ratio 5/3/4 MPa/mnt ... 17
Nominal JPNMTa
Nominal outer diameter
5DR 33
Company: Table, =6.3MFa
Nominal outer diameter of pipe,
Nominal wall series corresponding to nominal pressure
Nominal material/rnm
Standard size
SDA 22
Nominal pressure PN/MPa
QH/T2668-2004
QB/T2666-2004
5.4 Pressure reduction coefficient
Product 1 Working force () According to the standard (2), Pv-PWx
Temperature reduction coefficient
--Medium reduction coefficient effect:
When the temperature is above 20℃, the reduction coefficient is shown in Table 5. Table 5 Temperature reduction coefficient
Flow reduction coefficient
For different quality fluids, the reduction coefficient effect of the quality is shown in Table 6. sr:
Table 6 Medium reduction coefficient island
Name
Metal product
6.1 Color
National source teaching city common terrain research
(Pneumatic box this)
The section is black, other standard colors are determined by the supplier and the recipient: the color of the pipe is consistent with the original color. 6.2 Appearance
Quality of the product
The gas party will send:
The appearance of the material should be smooth and flat: without any pits, bubbles and other defects that affect the performance of the pipe. The pipe should not have any verticality between the pipe and the axis
6. 3 Size of pipes 6.3.1 Length The length shall be (m, 9m or 12m, which may be determined by the manufacturer according to the actual requirements. 6.3.2 Average outer diameter The average outer diameter of the pipe shall conform to the specifications in Table 7. Table 7 Average outer diameter QB/T 2668-2004 Maximum outer diameter and deviation The wall tolerance of each point of the pipe meets the requirements of Article 8. Table 7 Wall thickness tolerance Minimum wall thickness tolerance, Minimum deviation, Unit is tt/tt, tt/tt/tt 6.4 Hydrostatic strength
The hydrostatic strength of the pipe shall comply with the provisions of Table 9: Hydrostatic strength of the pipe
2 Hydrostatic strength (1006)
80 h Hydrostatic strength (165 h)
C Fluid change (100 h)
Physical and mechanical properties
α, = 10 MPa, , = 8 MPa
Annular force/MP
The physical and mechanical properties of the pipe shall comply with the provisions of Table 10. , = 6.3 MPa
Annular force/MP
Table 10 Requirements for physical and mechanical properties of pipes
Oxidation induction net minister time (200 yuan)/mm
Tensile properties
Simply supported double impact end strength!
Stretching and pressing should be less than M2
This is the length of the belt:%
Longitudinal main/
Sanitary performance
Wabang Class 1
Heavy sample class?
Mature sample class!
C sample class 2
QB/T2666—2004
No magnetic adjustment, no rolling leakage
No breakage, no rolling application
UHMWPFI
Sample type!
Sample type 2
Sample type!
Trial type 2
.u. 3t
When used for the delivery of drinking water, the sanitary performance of the pipe shall comply with the requirements of GB/T17219-[998 or relevant regulations. 7 Test method
Standard environment for specimen conditioning and testing 7.1
Except as otherwise specified in the test method standard, the specimen shall be conditioned in accordance with the provisions of GB/T 2918-1998 at a temperature of (23 ± 2)°C and relative humidity of <50 ± 5)% for a period of not less than 24 hours, and the test shall be carried out in this environment: 7.2 Color and appearance
Sample condition shall be determined by the naked eye.
7.3 Dimension measurement
7.3.1 Length
Measured according to GB/T &806 and
7.3.2 Average outer diameter
Measured according to GB/T8806
n/T2668-25G4
7.3.3 Wall diameter and deviation
Measured according to GB/TSSUG,
7.4 Hydrostatic strength
Tested according to GB/6111-2003. The outer material of the pipe is water. 75
Oxidation permeation time
teaching (0/T17341-1998 test model: select two inner surfaces of the pipe 7.6 tensile properties
GB/T88M.3-2(KB determination.
Simply supported double notched impact strength
Appendix A test
7.B mortar loss rate
Appendix B method test:
7.9 longitudinal shrinkage rate
G 71-2U01 continent, the test wet filtration is (1102).10 nature
GB172191998 provisions,
8 variable test rules
8.1 production price production cost control test individual quality high standard reduction have a relatively high production market-6.2 batch and sample
8. 2. 1 batch
original material, formula and process are the same, and the same batch is taken as a batch. The effective period is not more than 5U per batch, and the small product is taken as a batch. The delivery can be composed of multiple batches. The batch numbers are clearly marked when delivering. The same delivery product is considered as a batch for inspection:
8.2.2 For details, the sampling rate is: half of the inspection water, acceptance quality limit (AO1.>E.5: Sampling is shown in Table 11, Table 11 Sampling plan|| tt||26~~150
151~28u
281~500
501~·1200
1201--3200
3201--10000
Hot makeup desire Ae
When the package is
8.3 Factory inspection
6.3.1 Mountain" inspection test 6.1, 6.2, 6.3 times 0℃, 1051 static hydraulic strength test, load support deep double fast 11 punch ten according to intention (23) pull meter system service force, change the stop pin length 10
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