GB/T 39382-2020 English PDF (GBT39382-2020)

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GB/T 39382-2020: Thermoplastics piping systems for soil and waste discharge inside buildings. Test method for airtightness of joints
GB/T 39382-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 83.140.30
G 33
GB/T 39382-2020 / ISO 13255:2010
Thermoplastics Piping Systems for Solid and Waste
Discharge inside Buildings - Test Method for
Airtightness of Joints
(ISO 13255:2010, IDT)
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: JUNE 1, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Principle ... 5 
3 Equipment ... 5 
4 Specimen ... 6 
5 Test Procedures ... 7 
6 Test Report ... 8 
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
This Standard uses the translation method and equivalently adopts ISO 13255:2010
Thermoplastics Piping Systems for Soil and Waste Discharge Inside Buildings - Test
Method for Airtightness of Joints.
This Standard makes the following editorial modifications:
---The pressure dimension bar is modified into the legal measurement unit MPa
(megapascal) of our country;
---In order to be consistent with the description of the standard in 5.7, the
description of b in Figure 1 is modified into “air intake”;
---In order to be consistent with the description of the standard in 5.7, the
description of 5 in Figure 1 is modified into “sealing device with water inlet, air
inlet and end fixing device”;
---500 in Figure 1 is modified to be replaced by L; the description of L is added to
Figure 1;
---In order to be consistent with the description in 5.8, 0%, 90%, 180% and 270%
in Figure 2 are modified into 0°, 90°, 180° and 270°.
Please be noted that certain content of this document might involve patents. The
institution issuing this document does not undertake the responsibility of identifying
these patents.
This Standard was proposed by China National Light Industry Council.
This Standard shall be under the jurisdiction of National Technical Committee 48 on
Plastics Products of Standardization Administration of China (SAC/TC 48).
The drafting organizations of this Standard: Beijing Building Materials Testing Academy
Co., Ltd. (National Supervision and Inspection Center for Water-saving Appliance
Products); Baolu Qixing Pipe Industry Co., Ltd.; Yonggao Co., Ltd.; China Aviation
Planning and Design Institute (Group) Co., Ltd.; Shanghai White Butterfly Pipe
Technology Co., Ltd.; Beijing Technology and Business University (Light Industry
Plastics Processing and Application Research Institute); Shandong Dongxin Plastic
Co., Ltd.; Liaocheng University; Beijing Building Materials Academy of Sciences
Research; Zhejiang Zhongcai Pipeline Technology Co., Ltd.; National Test Center of
Polymer and Chemical Building Materials (Material Testing Department); Hangzhou
Unicom Piping Industry Co., Ltd.; China Lesso Group Holdings Limited; Chengde
Precision Testing Machine Co., Ltd.
Thermoplastics Piping Systems for Soil and Waste
Discharge inside Buildings - Test Method for
Airtightness of Joints
1 Scope
This Standard specifies the test method for airtightness of joints of thermoplastic piping
systems for soil and waste discharge inside buildings.
2 Principle
Within the specified time, the assembly composed of pipes and / or pipe fittings are
subject to the specified internal atmospheric pressure. During the test, check the
airtightness of the assembly joints.
NOTE: the following test requirements may be provided by relevant standards:
a) Specimen preparation procedures in 4.1 and Chapter 5;
b) The number of specimens in 4.2.
3 Equipment
3.1 End Sealing Device
The joint assembly can be sealed and properly fixed; during the fixation, no axial force
shall be applied to the specimen. During the test, ensure that the sealing device or
specimen does not separate under the test pressure. The weight of the device shall
not affect the deflection angle of the specimen (see 5.8).
3.2 Atmospheric Pressure Source
It is connected to the end of at least one end sealing device through a shut-off valve.
During the test, the specified test pressure can be maintained, and the fluctuation
range is within ± 10% (see Chapter 5).
3.3 Pressure Measuring Device
The test pressure can be measured, so as to ensure that the test pressure complies
with the specified requirements (see 3.2 and Chapter 5).
unsealed end of the fixed component. Then, use sealing devices to seal all other ends
of the pipe or joint; one of the sealing devices has a water outlet in the center and is
connected to a shut-off valve (see Figure 2).
In accordance with the manufacturer’s requirements, assemble the joint assembly.
During the preparation of the specimen, within the deviation range allowed by the
standard, select the components with the smallest socket outer diameter and the
largest mouthing inner diameter. In accordance with the requirements of the relevant
standards, assemble them.
Measure and record the socket and mouthing dimensions of the selected components.
4.2 Number of Specimens
The number of specimens shall be specified in the relevant standards.
5 Test Procedures
5.1 The test temperature is (23 ± 5) °C; the test medium is water at room temperature.
During the test, there shall be no condensation on the surface of the specimen.
5.2 Horizontally fix the specimen on the test device (see Figure 1).
5.3 When conducting the test in accordance with the stipulations of 5.4 ~ 5.8, by
observing bubbles and water leakage generated by liquid soap (see 5.4), monitor and
record the leakage of the joint.
5.4 Apply liquid soap or a similar leakage indicator to the circumference of the joint
between the socket and the mouthing, then, wipe off the excess liquid.
5.5 Open the water drainage valve and close the air intake valve.
5.6 Open the water intake valve. Through the water flow at the water outlet of the pipe,
confirm that the water level in the specimen reaches half of the inner diameter of the
pipe. At that moment, firstly, close the water intake valve, then, close the water
drainage valve.
5.7 Open the air intake valve. At the test temperature specified in 5.1, use air as the
pressurizing medium to increase the internal pressure of the specimen to (0.01 ± 0.001)
MPa.
5.8 Maintain the pressure for 5 min. Then, deflect the pipe fitting or joint installed at the
end of the socket of the fixed component respectively in the direction of 0°, 90°, 180°
and 270° (see Figure 2), until the maximum deflection angle specified by the
manufacturer is reached, maintain for 1 min at each position.