GB/T 5135.18-2026Automatic sprinkler systems - Part 18: Pipe supports and hangers for fire protection systems (English PDF)

6.1 Appearance and Markings

6.1.1 Appearance Supports and hangers should be clearly marked, and the surfaces of all components should be smooth and free from processing defects, dents, and scratches. Coatings or platings should be uniform in color and free from peeling. Defects such as drops, bubbles, and scratches.

6.1.2 Marking The markings on the supports and hangers should be clear and not easily detached, and the content of the markings should comply with the provisions of 9.1.

6.2 Specifications The maximum applicable outer diameter of fire-fighting pipes for the pipe supports corresponds to nominal pipe diameters of 20mm, 25mm, 32mm, and 40mm. 50mm, 65mm, 80mm, 90mm, 100mm, 125mm, 150mm,.200mm, 250mm, 300mm.

6.3 Materials

6.3.1 The bolts and nuts used for supports and hangers shall comply with the provisions of GB/T 3098.

6.3.2 The anchor bolts used for supports and hangers shall comply with the provisions of JG/T 160.

6.3.3 The main load-bearing components of seismic bracing shall comply with the provisions of GB/T 6728, GB/T 3091 and GB/T 9944.

6.3.4 The coatings or platings on the surface of the components shall comply with the following requirements.

a) The thickness of the zinc plating layer on the outer surface should not be less than 12.7 µm, and the thickness of the zinc plating layer on the inner surface should not be less than 7.6 µm;

b) When hot-dip galvanizing is used, the thickness of the galvanized layer should not be less than 55 µm;

c) When using zinc-chromium coating, the coating thickness should not be less than 8.6 µm;

d) When epoxy spraying is used, the coating thickness should not be less than 70 µm.

6.4 Building connection components

6.4.1 Dimensional tolerances shall conform to the "medium m" specification in GB/T 1804-2000.

6.4.2 Conduct the test according to the test method specified in 7.3, and test the pipes corresponding to the maximum nominal pipe diameter to which the supports and hangers are applicable as specified in Table 1. Under the test load for 1 minute, the building connection components should show no obvious deformation, breakage, or other damage, and the connection to the building structure should be secure, without loosening or slippage. Desquamation and other phenomena.

6.4.3 When using sheet metal as a building connection component in seismic-resistant supports and hangers, the sheet metal thickness should not be less than 5mm.

6.5.1 Screw

6.5.1.1 When the support and hanger uses screws as the main load-bearing components, the screw dimensions shall conform to the provisions of Table 1.

6.5.1.2 The screw shall be tested according to the test method specified in 7.3, and the maximum nominal pipe diameter to which the supports and hangers are applicable shall be specified in Table 1. The test load should be maintained for 1 minute, and there should be no breakage or obvious deformation or other damage.

6.5.2 Flat steel

6.5.2.1 Dimensional tolerances shall conform to the "medium m" specification in GB/T 1804-2000.

6.5.2.2 The thickness of the flat steel should not be less than 3mm.

6.5.2.3 When the thickness of the flat steel is less than

4.8 mm, the test shall be conducted according to the test method specified in 7.3, and the supports and hangers specified in Table 1 shall be applicable. The test load should be

1.5 times the maximum nominal diameter of the pipe, and held for 1 minute. There should be no breakage or obvious deformation or other damage.

6.5.2.4 When the thickness of the flat steel is not less than

4.8 mm, the test shall be conducted according to the test method specified in 7.3.The supports and hangers specified in Table 1 are suitable. The pipe should be held under the test load corresponding to the maximum nominal diameter of the pipe for 1 minute, and there should be no breakage or obvious deformation or other damage.

6.5.3 Channel steel, steel pipes, and steel cables

6.5.3.1 The dimensional tolerances of channel steel and the length tolerances of steel pipes shall conform to the "medium m" specification in GB/T 1804-2000, and the outer diameter of the steel pipes... The permissible deviations of the wall thickness shall comply with the provisions of GB/T 3091, and the nominal diameter and permissible deviations of the steel cable shall comply with the provisions of GB/T 9944.

6.5.3.2 When channel steel or steel pipe is used as the main load-bearing component in seismic-resistant supports and hangers, the material thickness shall not be less than 2mm.

6.5.3.3 Conduct the test according to the test method specified in 7.3, and the maximum nominal pipe diameter to which the supports and hangers are applicable as specified in Table 1. The test load should be maintained for 1 minute, and there should be no breakage or obvious deformation or other damage.

6.5.4 Connector The test shall be conducted according to the test method specified in 7.3, and the test shall be conducted for the maximum nominal pipe diameter to which the supports and hangers specified in Table 1 are applicable. The load should be maintained for 1 minute without any breakage, obvious deformation, or structural damage.

6.6 Pipe connection components

6.6.1 Dimensional tolerances shall conform to the "medium m" specification in GB/T 1804-2000.

6.6.2 When flat steel is used for components, the material thickness should not be less than 3mm.

6.6.3 Conduct the test according to the test method specified in 7.3, and the test load corresponding to the maximum applicable nominal pipe diameter specified in Table 1. After holding the load for 1 minute, the component should show no signs of failure such as cracking or obvious deformation.

6.7 Tensile Deformation

6.7.1 Conduct the test according to the test method specified in 7.3.The entire support and hanger shall be tested according to the maximum applicable nominal pipe diameter specified in Table 1. The deformation generated under tensile load should not exceed 5 mm.

6.7.2 Conduct the test according to the test method specified in 7.3, and determine the maximum nominal pipe diameter to which the supports and hangers are applicable as specified in Table 1. Under tensile load, the building connection components should not deform and should not have any relative displacement with the building structure.

6.8 Vibration resistance The test shall be conducted according to the test method specified in 7.4.No components of the support and hanger shall be loose or detached. After the test, the building connection components of the support and hanger and... The strength of pipe connection components shall comply with the provisions of

6.6.3 respectively, and the strength of the main load-bearing components of supports and hangers shall comply with the provisions of

6.5.1.2 respectively. According to the provisions of 6.5.2.3, 6.5.2.4,

6.5.3.3 and 6.5.4, the tensile deformation of supports and building connection components shall comply with the provisions of 6.7.

6.9 Fire resistance The test shall be conducted according to the test method specified in 7.5.The fire resistance time shall be the value published by the manufacturer and shall not be less than 90 minutes. No breakage shall occur after the test. Cracking, peeling, and other phenomena.

6.10 Salt spray corrosion resistance The test shall be conducted according to the test method specified in 7.6, and there shall be no obvious corrosion damage after the test.

6.11 Seismic performance

6.11.1 Components Seismic-resistant support and hanger components, including building connections and pipe connections, shall be tested according to the test methods specified in 7.7.1.The ultimate bearing capacity of the components shall be... The load-bearing capacity value should not be lower than its design bearing capacity value.

6.11.2 Components Seismic bracing assemblies shall be tested according to the test methods specified in 7.7.2.The ultimate bearing capacity of a single assembly shall not be lower than that of all assemblies.

1.4 times the minimum design value of the load-bearing capacity of the component.

7.1 Visual Inspection

7.1.1 Visually inspect the markings and record the marking information.

7.1.2 Check the consistency of the test pieces in terms of process, visually inspect the test pieces for any processing defects, mechanical damage, and the condition of the coating or plating.

7.2 Material Inspection and Dimensional Measurement

7.2.1 Use specialized measuring tools to measure the dimensions of components. The diameter of the steel cable should be measured under no tension, along a straight section of the cable. At two cross-sections more than 0.1m from both ends of the steel cable, a diameter was measured in each direction perpendicular to the other on the same cross-section. Four measurements were performed. The average value of the result is used as the measured diameter of the wire rope.

7.2.2 Compare with the technical documents, check and record the quality certification documents and inspection reports of bolts, nuts, anchors, main load-bearing components, etc. content.

7.2.3 The coating thickness shall be measured in accordance with the provisions of GB/T 4956.

7.3 Load Test

7.3.1 The building components used in the test shall meet the installation conditions specified by the enterprise and have sufficient strength to ensure that they will not be damaged during the loading test. damage.

7.3.2 The loading test apparatus shall be capable of producing tensile deformation of

1.27 mm/min in the sample.

7.3.3 Assemble and install the supports and hangers onto the building components according to the manufacturer's installation instructions. When the supports and hangers have threaded connections, they should be installed according to the manufacturer's instructions or Table 2. Install to the specified torque, connect the support to the pipe with the largest applicable nominal diameter, and ensure the pipe length is not less than the contact length between the pipe and the support. The length of the portion is increased by 300mm, and the protruding portions at both ends are of the same length. As shown in Figure 1 or Figure 2.

7.3.5 Start the loading test device and increase the load to the preload corresponding to the maximum pipe diameter that the supports and hangers can withstand, as specified in Table 1. The distance A between the loading point and the building component at this moment is measured using a general-purpose measuring tool. The load is then increased to a tensile load, and the distance A at this moment is measured again using a general-purpose measuring tool. The distance B between the loading point and the building component is used to calculate the tensile deformation of the support.

7.3.6 Increase the load to the specified test load, maintain it for the specified time, and inspect the building connection components, main load-bearing components, and pipe connections. The condition of the components.

7.3.7 Using flat steel with a thickness of less than

4.8 mm as the main load-bearing component of the support frame, a loading test was conducted on the flat steel component separately. During the test, the flat steel component is subjected to force at the connection between it and the pipe, and is fixed at the connection end with other components of the support and hanger. It is held under the specified load for the specified time, and then inspected. Check the condition of the sample.

7.4 Vibration Test

7.4.1 The smallest applicable pipe diameter for each type shall be selected for the test.

7.4.2 Assemble and install the supports and hangers onto the building components according to the manufacturer's installation instructions, as shown in Figure 1 or Figure

2.Secure the building components. Ensure that the fire pipe supports are suspended on the frame of the vibration testing device.

7.4.3 Apply a 60kg load to the pipe connection of the support and hanger.

7.4.4 Start the vibration test apparatus and vibrate for 100 hours under test conditions of 35Hz and amplitude of (0.825±0.05)mm, then inspect the specimen. Condition.

7.4.5 After the vibration test, the strength of the building connection components and pipe connection components of the supports and hangers shall be tested by loading according to the method specified in 7.3. The strength of the main load-bearing components of the support and hanger was tested by loading, and the tensile deformation of the support and hanger and the building connection components was tested and recorded. Experimental results.

7.5 Fire resistance test Assemble and install the supports and hangers onto the building components according to the manufacturer's installation instructions, and place them inside the test furnace. At the pipe connection points of the supports and hangers... Apply a 60kg load and conduct a fire resistance test according to GB/T 9978.1.

7.6 Salt spray corrosion test Salt spray corrosion tests were conducted according to the test methods specified in GB/T 25208, where the sodium chloride solution concentration was (5±0.1)%. The duration is shown in Table 3.

7.7.1 Components Install according to the connection method, installation torque, and installation angle specified in the manufacturer's instruction manual. The number of test samples is 3 sets. Tests were conducted according to the maximum and minimum values of the component installation angle range, and the test angles corresponding to the angle values within the range as shown in Table 4. The horizontal cyclic loading is performed according to the methods specified in

6.5.3.3 of GB/T 37267-2018.The design value of the bearing capacity F of the component is... When F <= 1.125kN, the initial force is 1.125kN; when F > 1.125kN, the initial force is 4.5kN. The test was terminated when the number of cyclic loading cycles reached 55, the specimen failed, or the horizontal displacement exceeded 25 mm. The last reading before the test ended was recorded. The peak value of the loading force in each complete cycle, and the minimum value among the three tests, is the ultimate bearing capacity of the specimen.

7.7.2 Components Install according to the connection method, installation torque, maximum pipe outer diameter, maximum installation spacing, and installation angle specified in the manufacturer's instruction manual. The sample quantity is 2 sets. Based on the maximum and minimum installation angle range of the main load-bearing components, and the corresponding test angles in Table 4, the following tests were conducted. The test was conducted by applying cyclic loads horizontally according to the methods specified in

6.5.3.3 of GB/T 37267-2018.All components were subjected to this test. When the minimum design load-bearing capacity Fmin <= 2.25kN, the initial force is 2.25kN; when Fmin > 2.25kN, the initial force is 9kN. The test was terminated when the number of cyclic loading cycles reached 55, the specimen failed, or the horizontal displacement exceeded 50 mm. Before ending the test, the final loading cycle was performed. Half of the peak value of the full cyclic loading force is taken as the ultimate bearing capacity value of the specimen.

8.1.1 Type Testing

8.1.1.1 Type testing shall be conducted under any of the following circumstances.

a) Trial production and type approval of new products or old products transferred to another factory for production;

b) Changes in the product's design, structure, materials, components, parts, manufacturing processes, or production conditions may affect product quality. Measure time;

c) When the technical requirements specified in the product standard change;

d) When production resumes after a shutdown of one year or more;

e) When the product quality supervision department requests type testing;

f) Other situations where product quality can only be proven through type testing.

8.1.1.2 Product type inspection items shall be carried out in accordance with the provisions of Table 5.

8.1.2 Factory Inspection The number of product inspection items should not be less than the items specified in Table 5.

8.2 Sampling Method and Sample Size

8.2.1 Type testing shall employ random sampling, with a sampling base not less than five times the sample quantity specified in 8.3, and the sampling quantity shall comply with the requirements of 8.3. Sure.

8.2.2 The sampling base for factory inspection shall be determined by the producer based on the actual production volume. The number of samples randomly selected from each batch shall be in accordance with the requirements of

8.3 and the results shall be combined. The results are confirmed in Table 5.

8.3 Test Procedure The test procedure for supports and hangers shall be carried out as specified in Figure 4.

8.4 Judgment of Test Results

8.4.1 Type Testing All type test items passed, therefore the product is qualified.

8.4.2 Factory Inspection All factory inspection items passed, therefore the product is qualified.

9.1 Marking

9.1.1 The support frame itself shall be clearly and permanently marked, including at least.

a) Specifications and model;

b) Maximum nominal pipe diameter;

c) Manufacturer's name or trademark;

d) Production date or serial number.

9.1.2 Packaging and storage graphic symbols shall comply with the provisions of GB/T 191.

9.2 Instruction Manual The support bracket should include an instruction manual in its packaging, and the instruction manual should be prepared in accordance with the provisions of GB/T 9969. The instruction manual should include at least the following information. product name, specifications, operating environment conditions, storage environment conditions, and production date. Production s...