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JG/T 234-2008 PDF English

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JG/T 234-2008: Porcelain enameling steel panels for building
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JG/T 234-2008: Porcelain enameling steel panels for building

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JG BUILDING INDUSTRY STANDARD Porcelain enameling steel panels for building Issued on. JUNE 03, 2008 Implemented on. NOVEMBER 01, 2008 Issued by. Ministry of Housing and urban-rural development of the People's Republic of China

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Classification and mark... 7 5 Material... 11 6 Requirements... 12 7 Test Methods... 16 8 Inspection rules... 25 9 Mark, Packing, Transportation and Storage... 29 Reference... 30

Foreword

This Standard was proposed by Standard-Quota Institute of Ministry of Housing and Urban-Rural Development. This Standard shall be under the jurisdiction of Building Product and Part Standardization Technical Committee of Ministry of Housing and Urban-Rural Development. The responsible drafting organizations of this Standard. Zhejiang Kaier Industry Co., Ltd. AND Shenzhen Xinshan Curtain Wall Technology Consulting Co., Ltd. The participating drafting organizations of this Standard. Guangzhou Meibiao Yifeng Enamel Co., Ltd., Baolichang Metal Products (Shenzhen) Co., Ltd., Foshan Weiyi Metal Products Co., Ltd., Shenzhen Keyuan Building Group Co., Ltd., National Testing Center For Building Materials, Guangdong Province Academy of Building Science, Building Curtain-Wall, Door-Window Quality-Inspection Department of National Building Engineering Quality, Supervision and Test Center, Institute of Vitreous Enamel of Donghua University, East China Architectural Design & Research Institute Co. Ltd., AND Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Main drafters of this Standard. Du Jiyu, Xing Hanxue, Dou Tiebo, Li Zhiqiang, Wang Jiwen, Zhang Litao, Gu Jinfang, Li Xiuqing, Jiang Quan, Jiang Weizhong, Jiang Ren, Dang Jie, Tan Shangfei and Liu Ming. This Standard was issued for first-time. Porcelain Enameling Steel Panels for Building

1 Scope

This Standard specifies the terms and definitions, classification and mark, material, requirements, test method, inspection rules and mark, packing, transportation and storage of porcelain enameling steel panels for building. This Standard is applicable to porcelain enameling steel panels for interior and exterior decoration of building.

2 Normative references

The articles contained in the following documents have become part of this document when they are quoted herein. For the dated documents so quoted, all subsequent modifications (including all corrections) or revisions made thereafter do not apply to this Standard. However, the parties who reach an agreement according to this Standard are encouraged to study whether the latest versions of these documents can be used. For the undated documents so quoted, the latest versions (including all modification sheets) apply to this document. GB/T 191 Packaging - Pictorial marking for handling of goods GB/T2518 Continuously hot-dip zinc-coated steel sheet and strip GB/T 3880 Aluminium and aluminium alloy rolled sheet GB 6566 Limits of radionuclides in building materials GB 8624-2006 Classification for burning behavior of building materials and products GB/T 9174 General specification for transport packages of general cargo

3 Terms and definitions

For the purpose of this Standard, the following terms and definitions are applicable to this Standard. 3.1 Porcelain enameling steel panel The combination panel that the inorganic glass material is fused onto steel panel and forms firm combination with steel panel. 3.2 Composite porcelain enameling steel panel The porcelain enameling steel panel of which the backside is adhered with back-lining material or has interlayer. 3.3 Dry process enameling The enameling method that the dry porcelain glaze powder is coated onto the base steel panel through high-voltage static electricity. 3.4 Wet process enameling The enameling method that the porcelain glaze powder that is floated in water (medium) is coated onto base steel panel.

4 Classification and mark

4.1 Product name and code Product name. porcelain enameling steel panel for buildings and decoration, abbreviated as porcelain enameling steel panel; the code is. TCGB. 4.2 Classification and code 4.2.1 It can be divided into the following types according to application of panel. 4.2.2 It can be divided into the following types according to porcelain enameling process. 4.2.3 It can be divided into the following types according to the combination of panel. 4.3 Mark 4.3.1 Marking method Porcelain enameling steel panel for building and decoration is marked in such sequence according to product name and code, application, enameling process, combination, panel shape, dimension and standard number.

5 Material

5.1 Steel panel 5.1.1 Chemical composition (heat analysis) of base steel panel and steel belt shall conform to requirements in Table 1. 5.1.2 Mechanical properties of base steel panel and steel belt shall conform to requirements in Table 2. 5.1.3 The minimum measured thickness of base steel plane for interior decoration shall not be less than 1.0mm, and that for exterior decoration shall not be less than 1.4mm. 5.2.1 Back-lining material shall not be wet or hydrolyzed, and shall not pollute the environment. There shall be no substances harm to human. The limit of radioactive nuclide shall conform to regulations of GB 6566. 5.3 Adhesive and sealing material 5.3.1 The back-lining and back-lining overlay of the combination panel should be bonded by combustion heat value adhesive, and shall conform to requirements of fireproof performance in 6.4 of this Standard. 5.4 Fixed pendant 5.4.1 Fixed pendant shall be manufactured of cold-roll steel panel (the same material as that of base steel panel) of which the thickness is not below 2.0mm, and have porcelain enameling treatment together with base steel panel after being welded with the base plate. 5.4.2 If necessary, it can be made of stainless steel panel of which the thickness is not below 2.0mm.

6 Requirements

6.1 Dimensional deviation 6.1.1 The allowable dimensional deviation of square panel shall conform to regulations in Table 3. 6.1.2 The allowable deviation and geometric toleration of circular panel size shall conform to regulations in Table 4. 6.1.5 The folding height T around porcelain enameling steel panel shall not be less than 25mm. The inner radius of all the folding knuckles shall not be less than 3mm. When the fixed pendant is connected through bolts or rivets, the diameter of the reserved hole of bolts or rivets shall not be less than 5mm. 6.1.6 The size and geometric allowable deviation of openings and gaps on porcelain enameling steel panel surface shall conform to requirements in Table 6. 6.2 Surface quality 6.2.1 The internal and external surfaces of base steel panel shall have ground coat. The thickness of the porcelain coating on the external surface shall conform to regulations in Table 7. 6.4 Fireproof performance 6.4.1 Combustion performance level of interior decoration panel shall not be below Level A2 regulated in GB 8624-2006.Combustion performance level of exterior decoration panel shall be Level B or above regulated in GB 8624-2006. 6.4.2 Fire-resistant limit of porcelain steel panel shall reach requirements of the demander, but the lowest fire-resistant limit shall be the level of 0.5h and above. 6.5 Assembly quality of fixed pendant 6.5.1 The fixed pedant shall be firmly and reliable connected in accurate position, without defects influencing bearing force and installation.

7 Test Methods

7.1 Sampling 7.1.1 Test piece For the test piece that is not regulated in the test method, it may adopt the product sample as the test piece for inspection. If the product sample is not suitable for test (for example, it is limited by test equipment), then corresponding samples can be produced as the samples for inspection. 7.1.2 Preparation of corresponding samples 7.2 Dimensional deviation 7.2.1 The dimensional deviation of square panel shall be tested by straight steel ruler or steel tap with the maximum scale of 1mm. 7.2.2 The dimensional deviation of circular panel shall be tested by straight steel ruler, steel tap and feeler gauge with height and scale of 0.5mm. The circular fitness shall be tested via the following methods. 7.2.4 The allowable dimensional deviation, geometric deviation and allowable flatness deviation of other types of panels can refer to 7.1.1, 7.1.2 and 7.1.3.Precision of measurement tools shall meet regulations of the product’s supply-demand sides. Angle of square panel shall be inspected by protractor with a minimum scale of 0.5°. 7.2.5 The allowable deviation of hole size of the fixed pedant shall be inspected via Vernier caliper with a minimum scale of 0.5mm. 7.2.6 Size and allowable geometric dimensional deviation of openings and gaps on porcelain enameling steel panel surface shall be inspected via straight steel ruler and steel tap with a minimum scale of 1mm. 7.3 Surface quality 7.3.1 Porcelain coating thickness of external surface 7.3.1.1 Adopt a film thickness detector with precision of 0.5μm for inspection. 7.4 Physiochemical properties 7.4.1 Salt water resistance 7.4.1.1 Test sample Adopt corresponding samples as the inspection test pieces, not less than 3 pieces. 7.4.1.2 Test method Immerse test pieces in NaCl solution with concentration of (5±1%) (mass fraction) and temperature of 33°C ~ 35°C for 45 h, take them out, use water to flush them, place them indoor vertically for 2 h, and then observe whether the porcelain surface has rust. 7.4.2 Acid resistance Inspect it according to the method regulated in GB/T 9989-2005. 7.4.3 Alkali resistance 7.4.3.1 Sample Adopt corresponding samples as the inspection test pieces, not less than 3 pieces.

8 Inspection rules

8.1 Inspection category The product inspection can be divided into exit-factory inspection and type inspection; the inspection items are shown in Table 11. 8.2 Exit-factory inspection 8.2.1 Group-batching rules Take the production produced with the same raw material and same productive process as one inspection batch for the exit-factory inspection. 8.2.2 Sampling scheme and judgment rules 8.2.2.1 Dimension deviation, outer surface porcelain thickness and fixed pendant assembly quality inspection 8.2.2.2 The surface quality inspection The inspection of porcelain-face enameling defect shall be conducted from one by one. When it is inspected to be unqualified, that single-item is unqualified. 8.3.3 Sampling scheme and judgment rules a) On the basis of each inspection item, draw 1 sample randomly from the products with qualified exit-factory inspection to conduct test; when all the test results are qualified, the type inspection is judged to be qualified. If one of these items is unqualified, it shall draw double samples to conduct tests; when there is still one test result unqualified, then the type inspection is judged to be unqualified. b) For soft heavy impact resistance, wind load resistance, and fireproof performance, it shall draw samples according to the rules of test method. Once the test result is unqualified, the type inspection is judged to be unqualified, and no second test is conducted. e) For comprehensive judgment, when each inspection item result is qualified, the type inspection is judged to be qualified.

9 Mark, Packing, Transportation and Storage

9.1 Mark 9.1.1 The porcelain enameling steel panel shall be pasted with clear trademark or name of production factory. 9.2 Packing The product packing shall conform to regulations of GB/T 9174.Each object shall be packed by soft material in boxes. The packing shall be firm, with words such as “upwards, carry and place gently, rainproof, damp-proof and collision avoidance”. The packing box shall have certification, instructions for use and other quality certification documents and technical materials. 9.3 Transportation Handle and place the product gently during transportation. It is strictly prohibited to load and unload wildly in case of damage. Rainproof and damp-proof measures shall be taken during transportation and storage. JG/T 234-2008 JG BUILDING INDUSTRY STANDARD Porcelain enameling steel panels for building Issued on. JUNE 03, 2008 Implemented on. NOVEMBER 01, 2008 Issued by. Ministry of Housing and urban-rural development of the People's Republic of China

Table of Contents

Foreword... 3 1 Scope... 4 2 Normative references... 4 3 Terms and definitions... 5 4 Classification and mark... 7 5 Material... 11 6 Requirements... 12 7 Test Methods... 16 8 Inspection rules... 25 9 Mark, Packing, Transportation and Storage... 29 Reference... 30

Foreword

This Standard was proposed by Standard-Quota Institute of Ministry of Housing and Urban-Rural Development. This Standard shall be under the jurisdiction of Building Product and Part Standardization Technical Committee of Ministry of Housing and Urban-Rural Development. The responsible drafting organizations of this Standard. Zhejiang Kaier Industry Co., Ltd. AND Shenzhen Xinshan Curtain Wall Technology Consulting Co., Ltd. The participating drafting organizations of this Standard. Guangzhou Meibiao Yifeng Enamel Co., Ltd., Baolichang Metal Products (Shenzhen) Co., Ltd., Foshan Weiyi Metal Products Co., Ltd., Shenzhen Keyuan Building Group Co., Ltd., National Testing Center For Building Materials, Guangdong Province Academy of Building Science, Building Curtain-Wall, Door-Window Quality-Inspection Department of National Building Engineering Quality, Supervision and Test Center, Institute of Vitreous Enamel of Donghua University, East China Architectural Design & Research Institute Co. Ltd., AND Hangzhou Zhijiang Silicone Chemicals Co. Ltd. Main drafters of this Standard. Du Jiyu, Xing Hanxue, Dou Tiebo, Li Zhiqiang, Wang Jiwen, Zhang Litao, Gu Jinfang, Li Xiuqing, Jiang Quan, Jiang Weizhong, Jiang Ren, Dang Jie, Tan Shangfei and Liu Ming. This Standard was issued for first-time. Porcelain Enameling Steel Panels for Building

1 Scope

This Standard specifies the terms and definitions, classification and mark, material, requirements, test method, inspection rules and mark, packing, transportation and storage of porcelain enameling steel panels for building. This Standard is applicable to porcelain enameling steel panels for interior and exterior decoration of building.

2 Normative references

The articles contained in the following documents have become part of this document when they are quoted herein. For the dated documents so quoted, all subsequent modifications (including all corrections) or revisions made thereafter do not apply to this Standard. However, the parties who reach an agreement according to this Standard are encouraged to study whether the latest versions of these documents can be used. For the undated documents so quoted, the latest versions (including all modification sheets) apply to this document. GB/T 191 Packaging - Pictorial marking for handling of goods GB/T2518 Continuously hot-dip zinc-coated steel sheet and strip GB/T 3880 Aluminium and aluminium alloy rolled sheet GB 6566 Limits of radionuclides in building materials GB 8624-2006 Classification for burning behavior of building materials and products GB/T 9174 General specification for transport packages of general cargo

3 Terms and definitions

For the purpose of this Standard, the following terms and definitions are applicable to this Standard. 3.1 Porcelain enameling steel panel The combination panel that the inorganic glass material is fused onto steel panel and forms firm combination with steel panel. 3.2 Composite porcelain enameling steel panel The porcelain enameling steel panel of which the backside is adhered with back-lining material or has interlayer. 3.3 Dry process enameling The enameling method that the dry porcelain glaze powder is coated onto the base steel panel through high-voltage static electricity. 3.4 Wet process enameling The enameling method that the porcelain glaze powder that is floated in water (medium) is coated onto base steel panel.

4 Classification and mark

4.1 Product name and code Product name. porcelain enameling steel panel for buildings and decoration, abbreviated as porcelain enameling steel panel; the code is. TCGB. 4.2 Classification and code 4.2.1 It can be divided into the following types according to application of panel. 4.2.2 It can be divided into the following types according to porcelain enameling process. 4.2.3 It can be divided into the following types according to the combination of panel. 4.3 Mark 4.3.1 Marking method Porcelain enameling steel panel for building and decoration is marked in such sequence according to product name and code, application, enameling process, combination, panel shape, dimension and standard number.

5 Material

5.1 Steel panel 5.1.1 Chemical composition (heat analysis) of base steel panel and steel belt shall conform to requirements in Table 1. 5.1.2 Mechanical properties of base steel panel and steel belt shall conform to requirements in Table 2. 5.1.3 The minimum measured thickness of base steel plane for interior decoration shall not be less than 1.0mm, and that for exterior decoration shall not be less than 1.4mm. 5.2.1 Back-lining material shall not be wet or hydrolyzed, and shall not pollute the environment. There shall be no substances harm to human. The limit of radioactive nuclide shall conform to regulations of GB 6566. 5.3 Adhesive and sealing material 5.3.1 The back-lining and back-lining overlay of the combination panel should be bonded by combustion heat value adhesive, and shall conform to requirements of fireproof performance in 6.4 of this Standard. 5.4 Fixed pendant 5.4.1 Fixed pendant shall be manufactured of cold-roll steel panel (the same material as that of base steel panel) of which the thickness is not below 2.0mm, and have porcelain enameling treatment together with base steel panel after being welded with the base plate. 5.4.2 If necessary, it can be made of stainless steel panel of which the thickness is not below 2.0mm.

6 Requirements

6.1 Dimensional deviation 6.1.1 The allowable dimensional deviation of square panel shall conform to regulations in Table 3. 6.1.2 The allowable deviation and geometric toleration of circular panel size shall conform to regulations in Table 4. 6.1.5 The folding height T around porcelain enameling steel panel shall not be less than 25mm. The inner radius of all the folding knuckles shall not be less than 3mm. When the fixed pendant is connected through bolts or rivets, the diameter of the reserved hole of bolts or rivets shall not be less than 5mm. 6.1.6 The size and geometric allowable deviation of openings and gaps on porcelain enameling steel panel surface shall conform to requirements in Table 6. 6.2 Surface quality 6.2.1 The internal and external surfaces of base steel panel shall have ground coat. The thickness of the porcelain coating on the external surface shall conform to regulations in Table 7. 6.4 Fireproof performance 6.4.1 Combustion performance level of interior decoration panel shall not be below Level A2 regulated in GB 8624-2006.Combustion performance level of exterior decoration panel shall be Level B or above regulated in GB 8624-2006. 6.4.2 Fire-resistant limit of porcelain steel panel shall reach requirements of the demander, but the lowest fire-resistant limit shall be the level of 0.5h and above. 6.5 Assembly quality of fixed pendant 6.5.1 The fixed pedant shall be firmly and reliable connected in accurate position, without defects influencing bearing force and installation.

7 Test Methods

7.1 Sampling 7.1.1 Test piece For the test piece that is not regulated in the test method, it may adopt the product sample as the test piece for inspection. If the product sample is not suitable for test (for example, it is limited by test equipment), then corresponding samples can be produced as the samples for inspection. 7.1.2 Preparation of corresponding samples 7.2 Dimensional deviation 7.2.1 The dimensional deviation of square panel shall be tested by straight steel ruler or steel tap with the maximum scale of 1mm. 7.2.2 The dimensional deviation of circular panel shall be tested by straight steel ruler, steel tap and feeler gauge with height and scale of 0.5mm. The circular fitness shall be tested via the following methods. 7.2.4 The allowable dimensional deviation, geometric deviation and allowable flatness deviation of other types of panels can refer to 7.1.1, 7.1.2 and 7.1.3.Precision of measurement tools shall meet regulations of the product’s supply-demand sides. Angle of square panel shall be inspected by protractor with a minimum scale of 0.5°. 7.2.5 The allowable deviation of hole size of the fixed pedant shall be inspected via Vernier caliper with a minimum scale of 0.5mm. 7.2.6 Size and allowable geometric dimensional deviation of openings and gaps on porcelain enameling steel panel surface shall be inspected via straight steel ruler and steel tap with a minimum scale of 1mm. 7.3 Surface quality 7.3.1 Porcelain coating thickness of external surface 7.3.1.1 Adopt a film thickness detector with precision of 0.5μm for inspection. 7.4 Physiochemical properties 7.4.1 Salt water resistance 7.4.1.1 Test sample Adopt corresponding samples as the inspection test pieces, not less than 3 pieces. 7.4.1.2 Test method Immerse test pieces in NaCl solution with concentration of (5±1%) (mass fraction) and temperature of 33°C ~ 35°C for 45 h, take them out, use water to flush them, place them indoor vertically for 2 h, and then observe whether the porcelain surface has rust. 7.4.2 Acid resistance Inspect it according to the method regulated in GB/T 9989-2005. 7.4.3 Alkali resistance 7.4.3.1 Sample Adopt corresponding samples as the inspection test pieces, not less than 3 pieces.

8 Inspection rules

8.1 Inspection category The product inspection can be divided into exit-factory inspection and type inspection; the inspection items are shown in Table 11. 8.2 Exit-factory inspection 8.2.1 Group-batching rules Take the production produced with the same raw material and same productive process as one inspection batch for the exit-factory inspection. 8.2.2 Sampling scheme and judgment rules 8.2.2.1 Dimension deviation, outer surface porcelain thickness and fixed pendant assembly quality inspection 8.2.2.2 The surface quality inspection The inspection of porcelain-face enameling defect shall be conducted from one by one. When it is inspected to be unqualified, that single-item is unqualified. 8.3.3 Sampling scheme and judgment rules a) On the basis of each inspection item, draw 1 sample randomly from the products with qualified exit-factory inspection to conduct test; when all the test results are qualified, the type inspection is judged to be qualified. If one of these items is unqualified, it shall draw double samples to conduct tests; when there is still one test result unqualified, then the type inspection is judged to be unqualified. b) For soft heavy impact resistance, wind load resistance, and fireproof performance, it shall draw samples according to the rules of test method. Once the test result is unqualified, the type inspection is judged to be unqualified, and no second test is conducted. e) For comprehensive judgment, when each inspection item result is qualified, the type inspection is judged to be qualified.

9 Mark, Packing, Transportation and Storage

9.1 Mark 9.1.1 The porcelain enameling steel panel shall be pasted with clear trademark or name of production factory. 9.2 Packing The product packing shall conform to regulations of GB/T 9174.Each object shall be packed by soft material in boxes. The packing shall be firm, with words such as “upwards, carry and place gently, rainproof, damp-proof and collision avoidance”. The packing box shall have certification, instructions for use and other quality certification documents and technical materials. 9.3 Transportation Handle and place the product gently during transportation. It is strictly prohibited to load and unload wildly in case of damage. Rainproof and damp-proof measures shall be taken during transportation and storage. ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.


      

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