Rigid polyvinyl chloride (PVC) stair handrails are made of polyvinyl chloride (PVC) resin as the main raw material and are extruded. They can be used for railings in buildings (hereinafter referred to as handrails). QB/T 3633-1999 Rigid polyvinyl chloride stair handrails QB/T3633-1999 Standard download decompression password: www.bzxz.net

Professional Standard of the People's Republic of China
Hard polyvinyl chloride (PVC) stair handrail
ZBY28001-85
Hard polyvinyl fluoride (PVC) stair handrail made of polyvinyl chloride (PVC) resin as the main raw material and extruded. It can be used for railing handrails in buildings (hereinafter referred to as handrails).
1 Appearance specifications and codes
1.1 Appearance specifications and codes
1.1.1. This standard recommends several appearance specifications and codes of handrails (see Appendix), which can also be determined according to user requirements. The tolerance percentage should meet the requirements of Table 1.
Section width
1.1.2 Length 4±0.1 meters, which can also be determined according to user requirements. 1.2 Code
Technical requirements
2.1 The appearance should meet the requirements of Table 2.
Outer surface
Bending degree
Should be smooth and flat, with no cracks on the inner wall, no bubbles, missing materials and unevenness are allowed. It can be agreed with the user, but the color must be uniform, no color knots and decomposition and discoloration are allowed. The color line should be straight, but bending in the same direction is allowed, and the bending degree should be ≤0.5%. 2.2 Physical and mechanical properties should comply with the provisions of Table 3. Ministry of Light Industry of the People's Republic of China issued on April 18, 1985
Implementation on November 1, 1985
Note: H50-
Vicat softening point ℃
-20℃
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≤2 samples are destroyed
50% destruction height; E50—50% destruction energy. Test method
3.1 Specifications and dimensions
Use a vernier caliper with an accuracy of 0.02mm to randomly select five different measurement points on the same section and take the arithmetic mean. 3.2
Appearance inspection
In a brightly lit room, observe the product at any angle with the naked eye at a distance of 300~400mm. 3.3 Length
Measure with a steel tape measure with an accuracy of 0.5mm.
Determination of curvature (see Figure 1-22-1).
Calculation formula as formula (1):
Wu Zhong: R-
Handrail curvature, %;
Maximum height from chord to arc, mm;
L-handrail length, mm.
3.5 Determination of specific gravity
Figure 1-22-1
Determine according to GB1033--70 "Test method for specific gravity of plastics". 3.6 Softening point (Vicat) test method
Determine according to GB1633--79 "Test method for softening point (Vicat) of thermoplastics". 3.7 Drop weight impact test method
3.7.1 Test equipment
Drop weight impact test machine with a drop weight of 1 cm steel ball. 3.7.2 Sample
Use mechanical processing method to cut handrails with a length of 150mm. Each group of samples has 20 sections for the gradient method and 10 sections for each group of samples for the through method. 3.7.3 Test conditions
3.7.3.1 Test at 23±2℃
Test the sample after placing it at 23±2℃ for 4h. The test is carried out in a standard environment (23±2℃). (1)
Test immediately after placing it at -20±2℃ for 4h. The test is carried out in a standard environment (23±2℃). The residence time is required not to exceed 10s.
3.7.4 Test steps
3.7.4.1 Determine the starting point of the test
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Use at least six sections of the sample to determine the starting point of the test. It is best to raise (or lower) 100mm each time for the initial test (if this test has been done on a profile of one specification or type, there is no need to repeat this work). 3.7.4.2 Gradient method
20 sections of test are a group. Start the test from the determined test starting height. If the sample is not damaged, it will rise (d) m. If the sample is broken or cracked, it will drop (d) m. The height of each rise and fall can be 100mm or 400mm. Impact 20 sections in sequence. 3.7.4.3 Samples that have been tested once shall not be reused. 3.7.4.4 Processing of test results.
H5o=H,+
Wherein: ——-50% failure height, m;
2(t + n)
H..-test starting point height (predicted test failure height) m; d
test height of each rise and fall, m;
n,…the number of specimens that have been destroyed (or not destroyed) at each test height; —·When H is set to 0, the height level that increases or decreases one by one (i=·N--the total number of destroyed (or undestroyed) specimens NZn); 1
2,—1,0,1,2,3..**);
When using destroyed data, take a negative sign, and when using undestroyed data, take a positive sign. Esom·g·Hs0
Wu Zhong Es*--50% destruction energy, kg·m;
m. Mass of the hammer.kg.
Gravity acceleration, (9.81m/s2);
50% destruction height, m.
The standard deviation (S) of 50% destruction height is calculated as follows: Z(2.n,)
Where: M---Look up the middle value of the "α value table". Sd
Where: S--Standard deviation,
α-…-See\Table 4\α value table;
4 Impact index test methodbzxz.net
When determining whether the handrail or type profile specimen meets the impact index in its standard, it is recommended to use the test through method. 4.1 Pass method
(3)
4.1.1 At a fixed height, for handrails or other types of special-shaped materials, test 10 specimens. If more than 2 (not including 2) specimens are broken, the product is unqualified.
5 Performance test method
When testing the performance of the sample, it is recommended to use the gradient method described in 3.7.4.2 to 3.7.4.4 for inspection. Calculation example
Assume: A 1kg hammer is used to test 20 samples (d=100mm). 10 of them are damaged and the remaining 10 are not damaged. At this time, the number of damaged samples is 409
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and the number of undamaged samples is the same. Therefore, when calculating either side, this is an example of damaged samples: 50% damage height (H5o) From (2), we can get: Hso=90+10-）
-88. 0(cm)=0. 88(m)
50% destruction energy (Es) can be obtained from formula (2): Eso=1×9.81×0.88-8.633(kg·m) The standard deviation of 50% destruction height (S) can be obtained from formula (4) and (5): M=5-(312
10110/
From Table 4, it can be found that the α value when M is 0.41
α =0.7098
Substitute into formula (5):
S =10X0.71
=7.1(cm)=0. 071(m)
Note: "Table 4\α value table is attached to the next page Test height
Test results (×: damage; ○: no damage) n
121314|1516|17181920||×
6|78/91011
Table 4α value
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Test result report includes the following items
Type of test material;
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Continued Table 4
Test specimen preparation method (forming or processing method and conditions); test specimen shape, size and quantity;
Test specimen state adjustment;
Shape, size and mass of the weight;
Test environment;
Test results;
Test year, month, day and test site;
Other matters deemed necessary.
7 Inspection rules
7.1 Handrails of the same specification produced with the same formula and the same process conditions are regarded as a batch. Each batch The quantity shall not exceed 5t. If the production quantity is small, the production volume of 6 days in the production period shall be regarded as one batch. 7.2 Under the condition that the formula, raw materials, process conditions and specifications remain unchanged, the physical property indicators shall be tested once a month. If any of the items changes, the physical property indicators shall be tested.
7.3 When testing the physical property indicators of the product, proceed item by item according to Table 3. 7.4 During the test, three samples shall be taken from the batch of products for item by item inspection. If any indicator fails to meet the requirements, double samples shall be taken from the batch for re-inspection. If the re-inspection still fails to meet the requirements, the batch of products shall be deemed unqualified. 7.5 The appearance quality of the product shall be checked according to Table 2. Any product that does not meet the standard shall be deemed as a defective product. 411
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7.6 When the production and demand parties have a dispute over the product, the arbitration unit shall be asked to take double samples for inspection according to Table 3. If any of the indicators are unqualified, the entire batch shall be deemed as defective.
8 Marking, packaging, storage and transportation
8.1 Every four pieces shall be tied into a package with paper rope or straw rope. Each package shall be marked with the manufacturer, production date, inspector code and certificate of conformity. 8.2 During packaging, storage and transportation, the product shall not be thrown, impacted, exposed to the sun, rained or rubbed. 8.3 The handrail shall be stored in a warehouse below 40°C, not less than 1m away from the heat source. Any product stored in an environment below 0°C must be kept at room temperature for 24 hours before use.
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A1 Recommended handrail profile
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Appendix A
See Figures 1-22-2, 1-22-3.
Figure 1-22-2
SLF-1 handrail section
SI.F-2 handrail section
Figure 1-22-3
A2 Recommended handrail specifications and dimensions
Handrail model
Section width
Surface height
Section thickness
Slot width
Slot height
Unit: mm
Two groove unevenness
Recommended handrail width and height
Handrail model
Additional instructions:
This standard was proposed by the Plastics Bureau of the Ministry of Light Industry. This standard was drafted by the Tianjin Plastics Research Institute. ZBY2800185
Notch width
The main drafters of this standard are Wang Hongying, Zhang Zhigang and Jiao Caiyun. Height
The drop weight impact test method is equivalent to JIS K7211-1976 "General Rules for Impact Test Methods for Rigid PVC Plastics" 414
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