This standard specifies the test equipment, test specimens, test procedures, result calculation and test report for the external pressure strength of ceramic pipes. This standard is applicable to the radial external pressure strength test of ceramic pipes under room temperature conditions. GB/T 2832-1996 Test method for the external pressure strength of ceramic pipes GB/T2832-1996 Standard download decompression password: www.bzxz.net

GB/T 2832--1996
This standard is equivalent to the British national standard BS65:1991 "Sintered ceramic pipes, accessories and joints" \ Appendix B "Compressive strength test method", and is revised on the basis of the original standard GB2832--81. The treatment of the specimens in this standard is slightly different from that in Appendix B of BS65:1991. The specimens are not immersed in water. The number of specimens in Appendix B of BS65:1991 is not less than 2. This standard stipulates that the number of specimens is not less than 3 according to national conditions.
From the effective date, this standard also replaces GB2832~81. This standard was proposed by the State Building Materials Industry Bureau. This standard is under the jurisdiction of the National Industrial Ceramics Standardization Technical Committee. The drafting unit of this standard is: Shandong Industrial Ceramics Research and Design Institute of the State Building Materials Industry Bureau, and the main drafter of this standard is Jun Qian.
This standard is entrusted to Shandong Industrial Ceramics Research and Design Institute of the State Building Materials Industry Bureau for interpretation. This standard was first issued in 1981.
1 Scope
National Standard of the People's Republic of China
Test method for crushing strength of vitrified pipes
pipeGB/T2832-1996
Replaces GB2832-81
This standard specifies the test equipment, specimens, test procedures, result calculation and test report for the external pressure resistance of ceramic pipes. This standard applies to the radial external pressure strength test of ceramic pipes under room temperature conditions. 2 Equipment and measuring tools
2.1 Testing machine
The relative error of the indication shall not exceed 1%. The maximum load of the specimen failure shall be within the range of 20% to 90% of the selected range, and a certain uniform loading rate can be guaranteed during the test.
2.2 Fixture|| tt||2.2.1 The fixture should be a three-sided loading device, consisting of an upper and lower pressure head. The upper pressure head consists of an upper bearing steel beam, an upper pressure plate and a loading rubber strip. The lower pressure head consists of two supporting rubber strips, a lower pressure plate and a lower bearing steel beam. The bearing steel beam should have sufficient rigidity and will not undergo plastic deformation during the test. The three-sided loading device is shown in Figure 1. /10
(minimum 25)
1—Upper bearing steel beam; 2--Upper pressure plate + 3-Loading rubber strip; 4-Ceramic tube; 5-Supporting rubber strip; 6--Lower pressure plate; 7--Lower bearing steel dyeing or testing machine base Figure 1 Test device diagram
2.2.2 The pressure plate is made of knot-free hardwood with a thickness of 25~40mm. The upper pressure plate is 100mm wide and the lower pressure plate is 240mm wide. The plates can be fixed to the load-bearing steel beams by positioning strips.
2.2.3 The rubber strips are made of ordinary rubber with a hardness of Shore A55±5, and the cross-section thickness is 25~40mm and the width is 50±5mm. Approved by the State Administration of Technical Supervision on May 15, 1996 and implemented on December 1, 1996
GB/T 2832—1996
2.2.4 The two loaded rubber strips should be concentric with the top support. The two supporting rubber strips should be placed symmetrically, with equal thickness, parallel to each other, and the inner gap should be 25±5mm.
2.2.5 The upper and lower load-bearing steel beams, wooden pressure plates, and rubber strips shall not be shorter than the length of the pipe. 2.3 Measuring tool: metal ruler, with a graduation value of 1mm. 3 Test specimen
The test specimen should be a complete pipe. The number of test specimens shall not be less than 3. 4 Test stepsWww.bzxZ.net
4.1 Use a metal ruler to measure the effective length L on the two opposite sides of the test pipe and take the average value. 4.2 Place the test specimen flat on two supporting rubber strips. Apply a vertical load to the test specimen through the upper pressure head. Apply the load at a uniform speed of 0.4kN/s·m0.6kN/s·m until the test specimen is destroyed. Record the maximum load value when the test specimen is destroyed. 5 Result calculation
The external compressive strength of the ceramic pipe is calculated according to formula (1), and the result is retained to three significant figures. =
Where: 6.——External compressive strength of the test specimen, kN/m, P—The breaking load of the test specimen in kN;
L—The effective length of the test specimen, m.
6 Test report
The test report should include:
Name, specification and model of the specimen:
Sample supply unit:
Specimen number,
Testing machine model,
Destruction load:
Effective length of the specimen;
-Single value of external compressive strength:
-Test date and tester.
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