This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, transportation and storage of glass fiber reinforced plastic sand-filled pipes (hereinafter referred to as RPM pipes). CJ/T 3079-1998 Glass fiber reinforced plastic sand-filled pipes CJ/T3079-1998 CJ/T3079-1998 Standard download decompression password: www.bzxz.net

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CJ/T 3079—1998
Glass Fiber Reinforced Plastic Mortar Pipe
Glass Fiber Reinforced Plastic Mortar Pipe Construction Standard
Published on 1999-01-04
Engineering Construction Standard Full Text Information System
Published by the Ministry of Construction of the People's Republic of China
Implemented on 1999-06-01
Engineering Construction Standard Full Text Information System
CJ/T 3079—1998
Foreword·
Cited Standards
3 Definitions
Product Classification
5 Specifications Dimensions
Technical requirements
7Test methods
8Inspection rules
9Marking, transportation and storage
........0
Appendix A (Appendix to the standard)
Long-term hydrostatic design basis (HDB) test and determination method. Appendix B (Appendix to the standard)
Long-term bending strain S, test and determination method·Engineering Construction Standard Full-text Information System
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CJ/T3079—1998
This standard adopts the American ANSI/AWWAC950-1995 "Glass Fiber Reinforced Plastic Pressure Pipe" in a non-equivalent manner. Through the formulation of this standard, my country's glass fiber reinforced plastic sand-filled pipe products are standardized and unified to promote and meet the development and application needs of my country's glass fiber reinforced plastic sand-filled pipe. Considering the current production status of glass fiber reinforced plastic sand-filled pipes in my country, this standard is applicable to three typical processes for producing glass fiber reinforced plastic sand-filled pipes, namely, fixed-length winding process, centrifugal casting process and continuous winding process. The above three types of processes and products have their own characteristics, but as long as the products meet the requirements of this standard and are combined with reasonable construction, the use of the products can be safe and reliable. Appendix A and Appendix B of this standard are the appendices of the standard. This standard is proposed by the Standard and Quota Research Institute of the Ministry of Construction. This standard is under the jurisdiction of the Technical Committee for Standardization of Water Supply and Drainage Products of the Ministry of Construction. This standard is drafted by the Institute of Composite Materials Mechanics and Structures of Tongji University (chief editor), Jiangsu Zhongyi Glass Fiber Reinforced Plastics Co., Ltd., and Zhejiang Oriental Group Pipeline Company.
The main drafters of this standard are: Zhou Shigang, Zhou Jiyu, Wang Bohua, Shen Bixia, and Xue Yuande. This standard is entrusted to the Institute of Composite Materials Mechanics and Structures of Tongji University for interpretation. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
People's Republic of China Urban Construction Industry Standard Glass Fiber Reinforced Plastic Mortar Pipe
Glass Fiber Reinforced Plastic Mortar Pipe1Scope
CJ/T3079—1998
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, transportation and storage of glass fiber reinforced plastic mortar pipe (hereinafter referred to as RPM pipe). This standard is applicable to glass fiber reinforced plastic mortar pipe for underground or ground use, which is made of glass fiber and its products as reinforcement materials, unsaturated polyester resin, epoxy resin, etc. as matrix materials, quartz sand and inorganic non-metallic granular materials such as calcium carbonate as fillers as main materials, and is made of fixed-length winding process, centrifugal casting process and continuous winding process, with a nominal diameter of 200mm to 2500mm, a pressure of 0.1MPa to 2.5MPa, and a pipe stiffness of 1250N/m2 to 10000N/m2. This standard also applies to FRP pipes. RPM pipes whose nominal diameter, pressure grade and pipe stiffness grade are not within the scope specified in this standard can also refer to this standard. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T1447—1983
GB/T1458—1988
GB/T2576—1989
Test method for tensile properties of glass fiber reinforced plastics. Test method for tensile test of annular specimens of fiber-wound reinforced plastics. Test method for insoluble content of resin in fiber reinforced plastics. GB/T3854—1983
Test method for Barcol hardness of fiber reinforced plastics. GB/T5349—1985
GB/T5351—1985
Test method for axial tensile properties of fiber reinforced thermosetting plastic pipes. Test method for short-time water pressure failure pressure of fiber reinforced thermosetting plastic pipes. GB/T5352—1985 Test method for parallel plate external load properties of fiber reinforced thermosetting plastic pipes. GB5749—1985 Test method for drinking water sanitation Health standard GB/T8237-1987 Liquid unsaturated polyester resin for glass fiber reinforced plastic (GRP) GB13115-1991 Hygienic standard for unsaturated polyester resin and its GRP products for food containers and packaging materials GB/T13657-1992 Bisphenol-A type epoxy resin JC/T277-1994 Alkali-free untwisted glass fiber yarn JC/T278-1994 Medium alkali-free glass fiber yarn 3 Definition
3.1 Glass fiber reinforced plastic mortar pipe glassfibrereinforcedplasticmortarpipe Pipe made of glass fiber and its products as reinforcing materials, unsaturated polyester resin, epoxy resin, etc. as matrix materials, quartz sand and inorganic non-metallic granular materials such as carbonate as the main raw materials and made according to a certain process method. 3.2 Pipe stiffness SNpipestiffness
SN=EI/D, usually in N/m. Where EI is the annular bending stiffness of the inner tube wall per unit length along the tube axis, and D is the average diameter of the tube.
Approved by the Ministry of Construction of the People's Republic of China on January 4, 1999
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Implemented on June 1, 1999
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3.3 Filamant Winding Process A production method in which RPM tubes are manufactured layer by layer from the inside to the outside of a tube mold with a certain length by using a winding process. In this process, spiral winding and annular winding are used. 3.4 Centrifugal Casting Process A production method in which glass fiber, resin, quartz sand, etc. are cast into a rotating mold according to certain requirements, and the RPM tube is formed after heating and curing. The outer diameter of the pipe produced by this process is determined by the inner diameter of the mold, and the inner diameter of the pipe is determined by the amount of material added to the mold. 3.5 Continuous advancing mandrel method A production method that uses a winding process to manufacture RPM pipes in sections, thereby forming RPM pipe products of any length. In this process, circumferential winding is used.
4 Product classification
4.1 Basic classification method
This standard classifies products according to their process methods, pressure levels and pipe stiffness levels. 4.1.1 Process methods
1——Fixed-length winding process
4.1.2 Pressure level PN
I——Centrifugal casting process
Pressure levels: 0.1, 0.6, 1.0, 1.6, 2.0, 2.5MPa. 4.1.3 Pipe stiffness grade SN
Pipe stiffness grade: 1250, 2500, 5000, 10000N/m2. 4.2 Model
The model representation method of a complete RPMP is as follows: Continuous winding process
RPMP-OO--
CJXXXX-XXXX
Standard number
Pipe stiffness grade
Pressure grade
Nominal diameterwwW.bzxz.Net
Production process
Product code
Example: The glass fiber reinforced plastic sand-filled pipe produced by fixed-length winding process, with a nominal diameter of 1200mm, a pressure grade of 0.6MPa, and a pipe stiffness of 5000N/m2 is expressed as: RPMP-1-1200-0.6-5000CJ/TXXXX-×XXX. 5 Specifications and Dimensions
5.1 The dimensions of the outer diameter series RPM pipes are listed in Table 1. 5.2 The dimensions of the inner diameter series RPM pipes are listed in Table 2. 5.3 The standard effective length of the pipe is 6m and 12m. Engineering Construction Standard Full-text Information System
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Nominal Diameter
Nominal Diameter
Engineering Construction Standard Full-text Information System
1 Size of RPM pipe of outer diameter series
Outer Diameter
2 Size of RPM pipe of inner diameter series
Inner Diameter Range
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+2.0,-2.0
+2.1,-2.0
+2.3,—2.0
+2.5,—2.0
+3.0,—2.0
+3. 3,-2.0
+3.5，-2.0
+3.8，2.0
+4.0,—2.0
+4.5，2.0
+5.5，—2.0
+6.0，2.0
+6.5，2.0
+7.0，2.0
+7.5，—2.0
+7.5，—2.0
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6 Technical Requirements
6.1 Pipes shall be manufactured and inspected in accordance with the requirements of this standard and the drawings and technical documents approved through the prescribed procedures. 6.2 Raw materials
6.2.1 Resin
6.2.1.1 The unsaturated polyester resin used shall comply with the provisions of GB/T8237. 6.2.1.2 The epoxy resin used shall comply with the provisions of GB/T13657. 6.2.1.3 The hygienic indicators of the resin used for water pipes and drinking water pipes must meet the provisions of GB13115. 6.2.2 Reinforcement materials
6.2.2.1 The alkali-free and non-carbon fiber glass yarn used shall comply with the provisions of JC/T277. 6.2.2.2 The medium-alkali non-carbon fiber glass yarn used shall comply with the provisions of JC/T278. 6.2.3 Filler
The SiO2 content shall be greater than 95%. The moisture content shall be less than 0.2%. 6.2.4 Calcium carbonate
CaCO: The content shall be greater than 98%. The moisture content shall be less than 0.2%. 6.3 Appearance quality
The inner surface of the tube should be smooth and flat, without cracks, delamination, pinholes, impurities, poor rubber areas and bubbles, and the end surface of the tube should be flat and free of burrs. There are no obvious defects on the outer surface.
6.4 Dimensions
6.4.1 Diameter deviation: The outer diameter series should comply with the provisions of Table 1, and the inner diameter series should comply with the provisions of Table 2. 6.4.2 Length deviation of the tube: +0.005L (L is the effective length of the tube). 6.4.3 Wall thickness: The minimum thickness should not be less than 87.5% of the nominal thickness specified in the drawings and technical documents approved by the prescribed procedures. The average thickness should not be less than the nominal thickness.
Verticality of the tube end surface: comply with the provisions of Table 3.
3 Requirements for verticality of pipe end face
Nominal diameter
DN<600
600DN<1000
DN≥1000
Verticality deviation of pipe end face
6.4.5 Inner lining: The thickness of the inner surface layer shall not be less than 0.5mm, and the thickness of the inner surface layer and sub-inner layer shall not be less than 1.2mm, as shown in Figure 1. Outer protective layer
Outer reinforcement layer
Resin mortar layer
Inner reinforcement layer
Sub-inner layer
Inner surface layer
Figure 1 Pipe wall structure
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Inner lining layer
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6.5 Insoluble content of resin
The insoluble content of resin in the pipe wall should not be less than 90%. 6.6 Barcol hardness
The Barcol hardness of the outer surface of the pipe should not be less than 40. 6.7 Initial mechanical properties
6.7.1 Initial pipe stiffness
The initial pipe stiffness should not be less than the corresponding pipe stiffness grade value. 2 Initial hoop tensile strength
The initial hoop tensile strength F of the pipe should be determined according to formula (1): Ft>C·PN·DN/2
Wherein: F. is the initial hoop tensile strength of the pipe, kN/m, PN is the pressure grade value, MPa;
DN is the nominal diameter, mm,
C1 is the coefficient, see Table 4.
When there is no long-term hydrostatic design benchmark test result (see Appendix A2), take C363 initial axial tensile strength
The initial axial tensile strength of the pipe shall not be lower than the value specified in Table 5. Table 4 Coefficient C1
Pressure level
Note: a=P./HDB
P. is the short-term failure water pressure;
HDB is the long-term hydrostatic design benchmark (Appendix A) Table 5
Nominal diameter
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Minimum initial axial tensile strength
Pressure level
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Nominal diameter
Hydrostatic leakage
Table 5 (end)
Pressure level
Apply a water pressure of 1.5 times the pressure level of the pipe to the pipe section or the pipe section with joints, and maintain it for 2 minutes. The pipe body and the connection parts should not leak.
6.7.5 Short-term failure water pressure
The short-term failure water pressure of the pipe should not be less than C1 times the pressure level of the pipe (C1 is taken according to Table 4). When there is no long-term hydrostatic design benchmark test result, take C1=6.
6.7.6 Initial flexibility
The initial flexibility requirements are shown in Table 6.
Table 6 Radial deformation rate and required flexibility level of initial flexibility
6.824h performance
6.8.124h hydrostatic pressure
Pipe stiffness grade, N/m2
No cracks on the inner wall of the pipe
No delamination of the pipe wall structure, fiber breakage and bending. The 24h failure pressure of the pipe should not be less than C2 PN (C2 see Table 7). When there is no long-term hydrostatic design benchmark test result, take C2-4.1.
7 Coefficient C2
Pressure grade (PN)
Note: a See the note of Table 4
6.8.224h flexibility
24h flexibility requirements see Table 8.
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Engineering Construction Standard Full-text Information System
Flexure level
6.9 Long-term performance
Table 8 Radial deformation rate and requirements of 24h flexibility test Calculate the pipe stiffness level, N/m2
6.9.1 Long-term hydrostatic design basis HDB
The long-term hydrostatic design basis HDB of the pipe shall meet the following requirements: HDB≥>C·PN
Where: Cs
Coefficient, see Table 9.
Coefficient C3
Pressure level
6.9.2 Long-term bending strain Se
The long-term bending strain S (usually refers to the bending strain of the pipe after 50 years) shall not be less than 0.5%. 6.10 Connection
6.10.1 Unconstrained connection
The pipe wall structure has no delamination and fiber breakage
The connection form of socket or sleeve with rubber ring is adopted. This joint cannot withstand the force of the pipe axis. 6.10.2 Constrained connection
6.10.2.1 Adhesive connection
a) Tapered socket and spigot adhesive connection: The connecting end of the pipe is made into a socket and spigot with a certain taper, and the two are bonded into a body with an adhesive.
b) External layer connection: The glass fiber reinforcement material is impregnated with a resin matrix with a catalyst system, and it is laid on the pipe joint to connect the two pipes into one.
6.10.2.2 Flange connection
According to user requirements, the pipe end can be made into a flange that matches the size of the steel pipe or cast iron pipe for connection. 6.10.3 Requirements
All kinds of connections should maintain watertightness and have good reliability when the pipeline is in normal working condition. 6.11 Hygienic performance
Pipes used to transport drinking water should meet the requirements of GB5749 7 Test methods
7.1 Appearance quality
Use visual inspection to inspect the inner and outer surfaces and both end faces of the pipe. 7.2 Dimension measurement
7.2.1 Outer diameter of the pipe
At both ends of the pipe, use a steel tape measure (with an accuracy of 1mm) to wrap around the pipe (make sure it is perpendicular to the axis of the pipe) to measure the circumference of the pipe and calculate the outer diameter to an accuracy of 0.5mm.
7.2.2 Length of the pipe
Put the pipe on a flat surface and use a steel tape measure (with an accuracy of 1mm) to measure its length along the generatrix of the pipe to an accuracy of 1mm. Engineering Construction Standard Full-text Information System
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7.2.3 Pipe wall thickness and lining thickness
Use measuring tools such as vernier calipers to measure the wall thickness to an accuracy of 0.1mm. Use an optical scale comparator with a minimum scale of 0.1mm or 7 to 10 times less than 0.1mm to measure the thickness of the lining layer. Cut the end of the pipe vertically. Use sandpaper with a sand fineness of 0.074mm (or finer) to smooth the cut, remove the resin and glass dust with water, and after completely cleaning the polished area, adjust the main scale division line to the apparent interface between the lining and the structure, and then measure the thickness of the lining layer. The estimated reading should be accurate to 0.05mm. Measure at least six times, and the measuring points should be evenly distributed. It can also be measured with an instrument that can achieve the same accuracy. 7.2.4 Pipe end face verticality
Use a square ruler plus a steel ruler (accuracy of 1mm) to measure the verticality of the pipe end face to an accuracy of 0.5mm. 7.3 Insoluble content of resin
Tested in accordance with the provisions of GB/T2576. 7.4 Barcol hardness
Tested in accordance with the provisions of GB/T3854. 7.5 Mechanical properties
7.5.1 Tube stiffness
Tested in accordance with the provisions of GB/T5352, and the initial tube stiffness S (N/m2) was calculated according to formula (3). S-0.0186F/△Y...
Where: △Y—tube diameter change, generally 5% of the average diameter of the sample, m; F—linear load corresponding to △Y, N/m. 7.5.2 Initial hoop tensile strength
The initial hoop tensile strength can be tested by one of the following methods. ：（3）
1) Test in accordance with the provisions of GB/T1458. The thickness is the wall thickness, the diameter is the ring diameter, the width of the test piece is 20mm, and a semicircle with a diameter of 10mm is opened on both sides of the test piece at both ends of the horizontal diameter. 2) Test in accordance with the provisions of GB/T1447. When the wall thickness is greater than 10mm, the width of the test piece is 15mm. 7.5.3 Initial axial tensile strength
The initial axial tensile strength can be tested by one of the following methods: 7.5.3.1 Test in accordance with the provisions of GB/T5349. 7.5.3.2 Same as item 2) in 7.5.2.
7.5.4 Water pressure leakage test
Test in accordance with the provisions of GB/T5351. The sealing type should adopt constrained end seal. The test pressure is 1.5 times the pressure level and the pressure is maintained for 2 minutes.
7.5.5 Short-term failure water pressure
Test according to the provisions of GB/T5351. The sealing type should adopt the constrained end seal. 7.5.6 Initial flexural test
Sampling and loading shall be carried out according to the provisions of GB/T5352. When loaded to flexural level A, keep for 6 minutes and observe the condition of the sample. Then continue to load to flexural level B and keep for 6 minutes and observe the condition of the sample. 7.5.7 24h flexural test shall be carried out according to the provisions of GB/T5352. When loaded to flexural level D, keep for 24 hours and observe the condition of the sample.
7.5.8 24h hydrostatic pressure test shall be carried out according to the provisions of GB/T5351. Samples shall be taken and pressurized to the corresponding values ​​in Table 7 and kept for 24 hours. 7.6 Long-term performance
7.6.1 Long-term design pressure
Carry out according to the method specified in Appendix A (Appendix of the standard). 7.6.2 Long-term bending strength
Perform the test in accordance with the method specified in Appendix B (Appendix to the standard). Engineering 8 Construction Standard Full-text Information System
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8 Inspection Rules
8.1 Inspection is divided into factory inspection and type inspection. 8.2 Factory inspection
8.2.1 Inspection items
Appearance quality, size, Barcol hardness, resin insoluble content, initial mechanical properties and 24h performance. 8.2.2 Inspection plan
8.2.2.1 Appearance quality, size, Barcol hardness Each RPM pipe shall be inspected for appearance quality, size and Barcol hardness. 8.2.2.2 Insoluble content of resin, initial mechanical properties and 24h performance Take 100 products of the same material, same process and same specifications as a batch (less than 100 products as a batch, the same below), randomly sample one, and conduct the insoluble content of resin, mechanical properties and 24h performance test. 8.2.2.3 Judgment rules
The appearance quality, size and Barcol hardness of each tube shall meet the technical requirements of 6.3-6.5, otherwise it shall be judged as an unqualified product. The insoluble content of resin and mechanical properties shall meet the technical requirements. If unqualified, double sampling shall be conducted. All re-inspected samples shall meet the technical requirements, otherwise, the batch of products shall be downgraded for use. 8.3 Type inspection
8.3.1 Inspection conditions
Type inspection should be carried out in any of the following situations: a) New products or old products are being tested for conversion and type identification; b) After formal production, when the material, structure, and process of the product have changed significantly and may affect the product performance; c) During normal production, inspection should be carried out once a year; d) When the product is suspended for a long time (when production is resumed after more than three months); e) When there is a significant difference between the factory inspection result and the most recent type inspection result; f) When the national quality supervision agency requires inspection. 8.3.2 Inspection items
Same as 8.2.1.
8.3.3 Inspection plan
8.3.3.1 Appearance quality, size, and Barcol hardness For products of the same specification, take 100 products as a batch, and randomly sample six products from the same batch for appearance quality, size, and Barcol hardness inspection. 8.3.3.2 Insoluble content of resin, initial mechanical properties and 24h performance For products of the same specification, 100 products are taken as a batch. The same batch of products adopts the two-time sampling method, with 4 samples in each batch, to test the content of resin, insoluble content of resin, mechanical properties and 24h performance.
8.3.3.3 Judgment rules
For the appearance quality, size and Barcol hardness of the sampled samples, if all of them are qualified or only one does not meet the requirements of 6.3 to 6.5, the type inspection of the corresponding items is judged to be qualified, otherwise it is unqualified. For the insoluble content of resin, initial mechanical properties and 24h performance of the first sampled sample, if all of them meet the technical requirements of 6.6 to 6.8, the corresponding type inspection is judged to be qualified; if more than one does not meet the requirements, it is judged to be unqualified. If one does not meet the requirements, a second sampling inspection is carried out. If there is an unqualified sample in the second sampling inspection, the corresponding type inspection is judged to be unqualified. 8.3.4 Hygienic properties
Periodic inspection is carried out according to the requirements of the national health department. 8.3.5 Long-term performance test
Each RPM pipe manufacturer should complete the long-term performance test within three years after production (see Appendix A and Appendix B for the test method). Engineering Construction Standard Full Text Information System
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7.5.4 Water pressure leakage test
The test shall be conducted in accordance with the provisions of GB/T5351. The sealing type shall adopt the restrained end seal. The test pressure shall be 1.5 times of the pressure level and the pressure shall be maintained for 2 minutes.
7.5.5 Short-term failure water pressure
The test shall be conducted in accordance with the provisions of GB/T5351. The sealing type shall adopt the restrained end seal. 7.5.6 Initial flexural test
The sample shall be loaded in accordance with the provisions of GB/T5352. When loaded to flexural level A, it shall be maintained for 6 minutes. The condition of the sample shall be observed. Then, the sample shall be continuously loaded to flexural level B and maintained for 6 minutes. The condition of the sample shall be observed. 7.5.724h flexural testThe sample shall be loaded in accordance with the provisions of GB/T5352. When loaded to flexural level D, it shall be maintained for 24 hours. The condition of the sample shall be observed.
7.5.824h hydrostatic pressure test Sampling shall be carried out in accordance with the provisions of GB/T5351, pressurized to the corresponding value in Table 7, and maintained for 24h. 7.6 Long-term performance
7.6.1 Long-term design pressure
Carry out according to the method specified in Appendix A (Appendix to the standard). 7.6.2 Long-term bending strength
Carry out according to the method specified in Appendix B (Appendix to the standard). Engineering 8 Construction Standard Full-text Information System
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8 Inspection rules
8.1 Inspection is divided into factory inspection and type inspection. 8.2 Factory inspection
8.2.1 Inspection items
Appearance quality, size, Barcol hardness, resin insoluble content, initial mechanical properties and 24h performance. 8.2.2 Inspection plan
8.2.2.1 Appearance quality, size, Barcol hardness Each RPM tube shall be inspected for appearance quality, size, and Barcol hardness. 8.2.2.2 Insoluble content of resin, initial mechanical properties, and 24h performance Take 100 products of the same material, same process, and same specifications as a batch (less than 100 products are considered as a batch, the same below), and randomly sample one for the insoluble content of resin, mechanical properties, and 24h performance inspection. 8.2.2.3 Judgment rules
The appearance quality, size, and Barcol hardness of each tube shall meet the technical requirements of 6.3 to 6.5, otherwise it shall be judged as an unqualified product. The insoluble content of resin and mechanical properties shall meet the technical requirements. If unqualified, double sampling shall be conducted. All re-inspected samples shall meet the technical requirements, otherwise, the batch of products shall be downgraded for use. 8.3 Type inspection
8.3.1 Inspection conditions
Type inspection should be carried out in any of the following situations: a) New products or old products are being tested for conversion and type identification; b) After formal production, when the material, structure, and process of the product have changed significantly and may affect the product performance; c) During normal production, inspection should be carried out once a year; d) When the product is suspended for a long time (when production is resumed after more than three months); e) When there is a significant difference between the factory inspection result and the most recent type inspection result; f) When the national quality supervision agency requires inspection. 8.3.2 Inspection items
Same as 8.2.1.
8.3.3 Inspection plan
8.3.3.1 Appearance quality, size, and Barcol hardness For products of the same specification, take 100 products as a batch, and randomly sample six products from the same batch for appearance quality, size, and Barcol hardness inspection. 8.3.3.2 Insoluble content of resin, initial mechanical properties and 24h performance For products of the same specification, 100 products are taken as a batch. The same batch of products adopts the two-time sampling method, with 4 samples in each batch, to test the content of resin, insoluble content of resin, mechanical properties and 24h performance.
8.3.3.3 Judgment rules
For the appearance quality, size and Barcol hardness of the sampled samples, if all of them are qualified or only one does not meet the requirements of 6.3 to 6.5, the type inspection of the corresponding items is judged to be qualified, otherwise it is unqualified. For the insoluble content of resin, initial mechanical properties and 24h performance of the first sampled sample, if all of them meet the technical requirements of 6.6 to 6.8, the corresponding type inspection is judged to be qualified; if more than one does not meet the requirements, it is judged to be unqualified. If one does not meet the requirements, a second sampling inspection is carried out. If there is an unqualified sample in the second sampling inspection, the corresponding type inspection is judged to be unqualified. 8.3.4 Hygienic properties
Periodic inspection is carried out according to the requirements of the national health department. 8.3.5 Long-term performance test
Each RPM pipe manufacturer should complete the long-term performance test within three years after production (see Appendix A and Appendix B for the test method). Engineering Construction Standard Full Text Information System
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7.5.4 Water pressure leakage test
The test shall be conducted in accordance with the provisions of GB/T5351. The sealing type shall adopt the restrained end seal. The test pressure shall be 1.5 times of the pressure level and the pressure shall be maintained for 2 minutes.
7.5.5 Short-term failure water pressure
The test shall be conducted in accordance with the provisions of GB/T5351. The sealing type shall adopt the restrained end seal. 7.5.6 Initial flexural test
The sample shall be loaded in accordance with the provisions of GB/T5352. When loaded to flexural level A, it shall be maintained for 6 minutes. The condition of the sample shall be observed. Then, the sample shall be continuously loaded to flexural level B and maintained for 6 minutes. The condition of the sample shall be observed. 7.5.724h flexural testThe sample shall be loaded in accordance with the provisions of GB/T5352. When loaded to flexural level D, it shall be maintained for 24 hours. The condition of the sample shall be observed.
7.5.824h hydrostatic pressure test Sampling shall be carried out in accordance with the provisions of GB/T5351, pressurized to the corresponding value in Table 7, and maintained for 24h. 7.6 Long-term performance
7.6.1 Long-term design pressure
Carry out according to the method specified in Appendix A (Appendix to the standard). 7.6.2 Long-term bending strength
Carry out according to the method specified in Appendix B (Appendix to the standard). Engineering 8 Construction Standard Full-text Information System
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8 Inspection rules
8.1 Inspection is divided into factory inspection and type inspection. 8.2 Factory inspection
8.2.1 Inspection items
Appearance quality, size, Barcol hardness, resin insoluble content, initial mechanical properties and 24h performance. 8.2.2 Inspection plan
8.2.2.1 Appearance quality, size, Barcol hardness Each RPM tube shall be inspected for appearance quality, size, and Barcol hardness. 8.2.2.2 Insoluble content of resin, initial mechanical properties, and 24h performance Take 100 products of the same material, same process, and same specifications as a batch (less than 100 products are considered as a batch, the same below), and randomly sample one for the insoluble content of resin, mechanical properties, and 24h performance inspection. 8.2.2.3 Judgment rules
The appearance quality, size, and Barcol hardness of each tube shall meet the technical requirements of 6.3 to 6.5, otherwise it shall be judged as an unqualified product. The insoluble content of resin and mechanical properties shall meet the technical requirements. If unqualified, double sampling shall be conducted. All re-inspected samples shall meet the technical requirements, otherwise, the batch of products shall be downgraded for use. 8.3 Type inspection
8.3.1 Inspection conditions
Type inspection should be carried out in any of the following situations: a) New products or old products are being tested for conversion and type identification; b) After formal production, when the material, structure, and process of the product have changed significantly and may affect the product performance; c) During normal production, inspection should be carried out once a year; d) When the product is suspended for a long time (when production is resumed after more than three months); e) When there is a significant difference between the factory inspection result and the most recent type inspection result; f) When the national quality supervision agency requires inspection. 8.3.2 Inspection items
Same as 8.2.1.
8.3.3 Inspection plan
8.3.3.1 Appearance quality, size, and Barcol hardness For products of the same specification, take 100 products as a batch, and randomly sample six products from the same batch for appearance quality, size, and Barcol hardness inspection. 8.3.3.2 Insoluble content of resin, initial mechanical properties and 24h performance For products of the same specification, 100 products are taken as a batch. The same batch of products adopts the two-time sampling method, with 4 samples in each batch, to test the content of resin, insoluble content of resin, mechanical properties and 24h performance.
8.3.3.3 Judgment rules
For the appearance quality, size and Barcol hardness of the sampled samples, if all of them are qualified or only one does not meet the requirements of 6.3 to 6.5, the type inspection of the corresponding items is judged to be qualified, otherwise it is unqualified. For the insoluble content of resin, initial mechanical properties and 24h performance of the first sampled sample, if all of them meet the technical requirements of 6.6 to 6.8, the corresponding type inspection is judged to be qualified; if more than one does not meet the requirements, it is judged to be unqualified. If one does not meet the requirements, a second sampling inspection is carried out. If there is an unqualified sample in the second sampling inspection, the corresponding type inspection is judged to be unqualified. 8.3.4 Hygienic properties
Periodic inspection is carried out according to the requirements of the national health department. 8.3.5 Long-term performance test
Each RPM pipe manufacturer should complete the long-term performance test within three years after production (see Appendix A and Appendix B for the test method). Engineering Construction Standard Full Text Information System
TTKAONTKAca-4 Hygienic performance
Perform regular inspections according to the requirements of the national health department. 8.3.5 Long-term performance test
Each RPM pipe manufacturer should complete the long-term performance test within three years after production (see Appendix A and Appendix B for the test method). Engineering Construction Standard Full Text Information System
TTKAONTKAca-4 Hygienic performance
Perform regular inspections according to the requirements of the national health department. 8.3.5 Long-term performance test
Each RPM pipe manufacturer should complete the long-term performance test within three years after production (see Appendix A and Appendix B for the test method). Engineering Construction Standard Full Text Information System
TTKAONTKAca-
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