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JG/T 402-2013 (JGT 402-2013)

Chinese Standard: 'JG/T 402-2013'
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Standard ID JG/T 402-2013 (JG/T402-2013)
Description (Translated English) Roofing products from metal sheet with reflect thermal coating
Sector / Industry Building & Construction Industry Standard (Recommended)
Classification of Chinese Standard Q73
Classification of International Standard 91.060.20
Word Count Estimation 20,29
Quoted Standard GB/T 191; GB/T 1740; GB/T 1766; GB/T 3880.2-2006; GB/T 4956; GB/T 4957; GB/T 5698-2001; GB/T 6388; GB/T 9754; GB/T 9761; GB/T 9780; GB/T 10125; GB/T 11186.2; GB/T 11186.3; GB/T 12754-2006; GB/T 16259-2008; GB/T 23443-2009
Drafting Organization China Certification & Inspection Group Building Materials Co., Ltd.
Administrative Organization Ministry of Housing and Urban-Rural Development, building products and components and parts Standardization Technical Committee
Regulation (derived from) Industry standard filing Notice 2013 No. 3 (total 159)
Summary This standard specifies the heat reflective metal roof (referred to roof) of the terms and definitions, classification and marking, materials, requirements, test methods, inspection rules, marking, packaging, transport and storage. This standard applies t

JG/T 402–2013
ICS 91.060.20
Q 73
Roofing products from metal sheet with reflect
thermal coating
Issued by. The 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 ... 6
5 Requirements ... 7
6 Test methods ... 10
7 Inspection rules ... 14
Annex A (Normative) The solar light reflectance ratio and the
near-infrared reflectance ratio test method-Spectrophotometer method
... 18
Annex B (Normative) Determination of the thermal insulation
difference ... 21
References and Original Chinese Documents ... 25
This Standard is prepared according to the rules specified in GB/T 1.1-2009.
This Standard is proposed by Research Institute of Standards & Norms of Ministry of
Housing and Urban-Rural Development.
This Standard is under the jurisdiction of National Technical Committee on Building
Components and Fittings of Standardization Administration of Ministry of Housing and
Urban-Rural Development.
The responsible drafting organizations are China Building Materials Inspection
Certification Group Co., Ltd and National Research Center of Testing Techniques for
Building Materials.
The participated drafting organizations are Hangzhou United Metaltek Industrial Holding
Co., Ltd, Beijing BIAM New Materials Technologies & Engineering Co. Ltd, Fujian Baihua
Chemical Co., Ltd, Shenzhen Radiant Industrial Co., Ltd, Shenzhen Grandland
Decoration Group., Co., Ltd, Shenzhen Jiada Hi-Tech Industry Development Co., Ltd,
Shanghai Datong Hi-tech Material Co., Ltd, Guangzhou B&G Building Materials Tech Co.,
Ltd, Akzo Nobel Car Refinishes (Jiaxing) Co., Ltd, Daikin Fluorochemicals (China) Co.,
Ltd, Nippon Paint (China) Co., Ltd, Suzhou Donglin Energy-saving Environment
Protection Building Material Co., Ltd, Changzhou Shuangou Flooring Co., Ltd, Shenzhen
Grace Shenli Alu. Co., Ltd, Jiangyin Zhongjiang Prepainted Steel Mfg Co. Ltd, Dong E
Blue Sky and Seven Color Building Materials Co., Ltd, Changzhou Lihua Metal Materials
Co., Ltd, Shanghai Jixiang Technology Development Group Co., Ltd and Ziwei Machinery
Equipment Co., Ltd, Shenyang.
The chief drafting staffs of this Standard include Jiang Quan, Liu Yi, Liu Shunli, Long
Guozhong, Xu Yongxiang, Wu Yuanguang, Li Shaoqiang, Guan Youjun, Gu Qinying, Feng
Tao, Zhou Gang, Zhou Dezhi, Tan Aimin, Han Hua, Wang Dong, Tang Jianrong, Zhang
Deming, Xu Minglin, Xiao Shuangqian, Zhang Shaohui, Zhu Rongping, Li Pan, Liu
Tingting, Liu Yujun, Zhao Chunzhi, Ma Liping and Zheng Xuying.
Roofing products from metal sheet with reflect
thermal coating
1 Scope
This Standard specifies the terms and definitions, classification and mark, materials,
requirements, test methods, inspection rules, marking, packaging, transportation and
storage of reflect thermal roofing products of metal sheet (“roofing board” for short).
This Standard applies to reflect thermal coating metal plate for building’s roofing.
2 Normative References
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, all the modifications
(including all corrections) or revisions made thereafter shall be applicable to this Standard.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 1740 Determination of resistance to heat and humidity of paint films
GB/T 1766 Paints and varnishes - Rating schemes of degradation of coats
GB/T 3880.2-2006 Wrought aluminum and aluminum alloy plate sheets and strips for
general engineering - part 2. mechanical properties
GB/T 4956 Non-magnetic coatings on magnetic substrates -- Measurement of coating
thickness -- Magnetic method
GB/T 4957 Non-conductive coatings on non-magnetic basis metals—Measurement of
coating thickness—Eddy current
GB/T 5698-2001 Glossary of color terms
GB/T 6388 Transport package shipping mark
GB/T 9754 Paints and varnishes—Determination of specular gloss of non-metallic paint
films at 20°, 60° and 85°
b) When there is significant change in structure, material or process, which might affect
the performance of the product;
c) When resuming production after more than six months;
d) When the regular production runs for 2 years;
e) When the out-of-factory inspection results are significantly different from those of last
type inspection;
f) When quality supervision agency requires type inspection.
7.4 Batch grouping and sampling rules
7.4.1 Batch grouping
Out-of-factory inspection shall be based on the batch of continuously manufactured
products with the same specification, variety and color.
The samples for type test shall be taken from the products with the same type,
specifications and color passing out-of-factory inspection. The roller-coating products
shall be taken from a batch of 6,000m2. The spray-coating products shall be taken from a
batch of 3,000m2. When the amount [i.e. less than 6,000m2 / 3,000m2] is insufficient, it
shall be considered as an independent batch.
7.4.2 Sampling Out-of-factory inspection
Appearance quality inspection may be continuously carried out on the production line, and
dimension and deviation shall be tested on each product. For the remaining, no less than
2m2 of the products shall be randomly selected from the same test batch and randomly
cut, based on the dimension and quantity required by the respective items. Type inspection
TAKE randomly at least 2m2 sample from the same test batch for inspection of
appearance quality, size deviation, coating thickness and glossiness deviation. And
randomly CUT according to size and number required by the respective items.
7.5 Determining rules
If all inspection results conform to the requirements of the standard, this batch of products
is deemed as qualified products. If there is any non-conformity, double-quantity samples
3—— Thermoelectric couple
4—— Xenon lamp;
5—— Wind speed sensor
6—— Axial fan (with wind-guide fairing);
7—— Temperature sensor
Figure B.1 Thermal Insulation Temperature Difference Experimental Setup
Schematic Diagram
B.6 Test steps
a) ADJUST the lab environment to meet the requirements of B.3;
b) CONNECT the thermoelectric couple and heat flow meter at the back of standard
board, then INSTALL them at the test port above the metering tank and SEAL it.
c) SWITCH-ON xenon lamp, ADJUST the radiation intensity of surface of test piece to
d) TURN-ON the axial fan and ADJUST the wind speed to 1.0m/s - 2.0m/s;
e) When the air temperature inside the metering tank reaches 23ºC, START to record
the time, and 1h later RECORD temperature T0 of inner surface of heat source of
standard board;
f) REPLACE th......
Related standard: JGJ/T 402-2017    JG/T 410-2013
Related PDF sample: GB/T 14370-2015