GB/T 19367-2022 (GB/T19367-2022, GBT 19367-2022, GBT19367-2022) & related versions
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GB/T 19367-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 79.060.01
CCS B 70
Replacing GB/T 19367-2009
Determination of dimensions of wood-based panels
(ISO 9426:2003, Wood-based panels - Determination of dimensions of panels, MOD)
ISSUED ON: DECEMBER 30, 2022
IMPLEMENTED ON: JULY 01, 2023
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 5
4 Determination methods ... 6
5 Result expression ... 9
6 Test report ... 10
Appendix A (Informative) Comparisons of structure numbers between this document
and ISO 9426:2003 ... 11
Appendix B (Informative) List of technical differences between this document and ISO
9426:2003 and their reasons ... 12
Foreword
This document is drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document replaces GB/T 19367-2009 "Determination of dimensions of wood-
based panels". Compared with GB/T 19367-2009, in addition to structural adjustments
and editorial changes, the main technical changes are as follows:
a) ADD terms and definitions (see Chapter 3);
b) DELETE the principles, sampling, moisture content and balance processing of the
plate during measurement (see Chapters 3, 4, 5, 6 of the 2009 edition);
c) ADD the diagonal method for squareness determination (see 4.4.2);
d) CHANGE the length measurement position (see 4.2; 8.2 of the 2009 edition);
e) CHANGE the flatness determination (see 4.6; 8.5 of the 2009 edition);
f) CHANGE the thickness accuracy requirements (see 5.2; 9.1 of the 2009 edition).
This document modifies and adopts ISO 9426:2003 "Wood-based panels -
Determination of dimensions of panels".
Compared with ISO 9426:2003, this document has many structural adjustments. See
Appendix A for a list of structure number comparisons between the two documents.
Compared with ISO 9426:2003, this document has many technical differences. The
involved clauses are marked with a vertical single line (│) in the outer margin of the
page. A list of these technical differences and their causes is provided in Appendix B.
The following editorial changes have been made to this document:
a) In order to coordinate with the existing standards, CHANGE the name of the
standard into "Determination of dimensions of wood-based panels";
b) ADD note to Figure 3;
c) ADD informative appendix A and appendix B.
Please note that some content in this document may be subject to patents. The publisher
of this document assumes no responsibility for identifying patents.
This document was proposed by the State Forestry and Grassland Administration.
Determination of dimensions of wood-based panels
1 Scope
This document describes methods for the determination of length, width, thickness,
squareness, edge straightness, flatness of wood-based panels.
This document is applicable to the dimensional determination of wood-based panels.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the version corresponding to the date applies to this document; for
undated reference documents, the latest version (including all amendments) applies to
this document.
JB/T 12202-2015 Wedge feeler gauge
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Squareness
The degree to which the distance between the edge of the panel and the edge of the
right angle (δ1, see Figure 1), or the four corners of the rectangular wood-based panel
form precise right angles.
the panel (see Figure 1). Then measure with one arm against the other side of the corner
of the panel. The results are expressed as the ratio of the distance to the arm length of
the mechanical square, in millimeters per meter (mm/m). Follow the same method as
above for other angles; take the maximum value.
4.4.2 Method 2
Use a steel tape measure (4.1.2), to measure the two diagonal lengths and opposite side
lengths of the panel, accurate to 1 mm. Calculate the diagonal difference and opposite
side difference, respectively. The results are expressed as diagonal difference and
opposite side difference, accurate to 1 mm.
4.5 Determination of edge straightness
Use a steel ruler (4.1.5) close to the edge of a panel, OR straighten a metal wire (4.1.6)
which is placed on two adjacent corners of the panel. According to the measurement
range, choose a steel ruler, feeler gauge (4.1.7), wedge feeler gauge (4.1.8) or vernier
caliper (4.1.3), to measure the maximum distance between the steel ruler or straightened
metal wire and the edge of the panel. The result is expressed as the ratio of the maximum
distance to the length of the panel edge, in millimeters per meters (mm/m). Other panel
edges are measured in the same way as above.
Note: If the length of the edge of the panel is less than 1000 mm, use a steel ruler; if the length
is greater than 1000 mm, use a metal wire.
4.6 Determination of flatness
Place the panel on a horizontal surface without any external force. Measure the distance
between the entire surface of the tested panel and the straightened metal wire. Find the
surface distance between the metal wire and the maximum deformation point of the
panel. Use a steel ruler (4.1.5) to make measurement. The result is expressed as the ratio
of the measured value to the diagonal of the panel, in millimeters per meter (mm/m).
5 Result expression
5.1 Length and width
For each tested panel, calculate the arithmetic mean of the measured values representing
the length and width respectively, accurate to 1 mm.
5.2 Thickness
For each tested panel, calculate the arithmetic mean of each measurement value,
accurate to 0.01 mm.
5.3 Squareness
Method 1: The result is the maximum measured value of the deviation between the edge
of the square and the edge of the panel, expressed in millimeters per meter of length,
accurate to 0.5 mm/m.
Method 2: The result is expressed as diagonal difference and opposite side difference,
accurate to 1 mm.
5.4 Edge straightness
The result is the maximum spacing divided by the length of that side, expressed in
millimeters per meter (mm/m). The width and length of the panel are expressed
separately.
5.5 Flatness
The results are expressed as the ratio of the maximum deformation value to the diagonal
of the panel, expressed in millimeters per meter (mm/m).
6 Test report
The test report shall contain the following information:
- Name and address of the testing laboratory;
- Sampling reports according to relevant provisions of individual product standards
for various wood-based panels;
- Standards implemented for testing;
- Date of test report;
- Type, format size, thickness of wood-based panels;
- Relevant product description;
- If necessary, description of the surface treatment status;
- The use of special instruments within the scope of this document as permitted under
various possible circumstances;
- Expression of test results using Chapter 5;
- All inconsistencies with this document.
......
GB/T 19367-2009
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 79.060.01
B 70
Replacing GB/T 19367.1-2003, GB/T 19367.2-2003
Wood-Based Panels -
Determination of Dimensions of Panels
(ISO 9426.2003, MOD)
ISSUED ON. MAY 12, 2009
IMPLEMENTED ON. NOVEMBER 01, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Principle ... 5
4 Sampling ... 5
5 Moisture-Content of the Panel at the Measurement ... 6
6 Balance Treatment ... 6
7 Instrument ... 6
8 Methods ... 7
9 Result Expression ... 9
10 Test Report ... 10
Foreword
This Standard modified and used international standard ISO 9426.2003 Wood-Based
Panels - Determination of Dimensions of Panels (English Version).
When this Standard modifies and uses internationals standard, the technical
differences shall be marked with vertical single-line on the terms of their margins.
Compared with ISO 9426.2003, this Standard has the technical differences as follows.
--- Add the following contents to 8.1. NOTE 1. in the event of a dispute between the
supplier and the purchaser, the panel is allowed to be sawed from the middle,
then measure as per above-mentioned method. NOTE 2. in the event of a
dispute between the supplier and the purchaser, the micrometer with probe
dimeter of 15.0mm~20.0mm is allowed to be used for measurement.
--- Modify the rope-line into metal line in “8.5 Determination of flatness”.
This Standard is the integrated revision against GB/T 19367.1 and GB/T 19367.2.
This Standard replaced GB/T 19367.1-2003 Wood-Based Panels – Determination of
Thickness, Width and Length of Boards, and GB/T 19367.2-2003 Wood-Based Panels
– Determination of Squareness and Straightness of Boards.
Compared with GB/T 19367.1-2003, GB/T 19367.2-2003, this Standards has the
differences as follows.
--- Add the contents of balance treatment;
--- Add the measurement contents of paperback degree.
This Standard was proposed by the State Forestry Administration of the PRC.
This Standard shall be under the jurisdiction of National Technical Committee for
Standardization of Wood-Based Panels.
Drafting organizations of this Standard. Research Institute of Wood Industry, Chinese
Academy of Forestry.
Participating drafting organizations of this Standard. Shanghai Institute of Quality
Inspection and Technical Research, Dehua Tubao New Decoration Material Co., Ltd.,
Foshan Nanhai Yaodonghua Furniture Boards Co., Ltd., Guangxi Fenglin Wood
Industry Group Co., Ltd., Jiangmen Daping Wood Industry Co., Ltd., Foshan Zhengsen
Wood Working Co., Ltd., Nanjing Leibo Texiangshi Wood Industry Co., Ltd., Asia Dekor
Industries (Shenzhen) Co., Ltd., Shengda Forestry Industry Co., Ltd., Shandong
Xingang Group Co., Ltd.
Chief drafting staffs of this Standard. Peng Limin, Cao Zhongrong, Zhang Yinghong,
Wood-Based Panels -
Determination of Dimensions of Panels
1 Scope
This Standard specifies the measurement methods for the thickness, width, length,
squareness, edge straightness and flatness of various wood-based panels.
This Standard is applicable to the wood-based panels with entire plane shape.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB/T 17657 Test Methods of Evaluating the Properties of Wood-based Panels and
Surface Decorated Wood-based Panels
3 Principle
Measure the entire panel’s thickness, length and width through the linear
measurement method.
Measure the entire panel’s squareness and straightness through measuring the
deviation between the mechanical-square or ruler and the panel.
Measure the flatness through measuring the surface deviation of the metal line
measurement panel that penetrates the whole surface and is straightened by the
panel’s edge.
4 Sampling
For the bulk testing of the finished panels, it shall be sampling according to the relevant
provisions of individual product standard for various wood-based panels.
stipulated in 7.5 to measure the distance δ1 between the panel’s edge and the other
arm’s side of the mechanical-square (see Figure 3).
Follow the same method for other corners.
NOTE. For process control of factory production, if the valid relevant data can be confirmed,
the squareness can also be measured by the difference of two-diagonals’ length of the panel;
use steel tape to measure.
8.4 Determination of edge straightness
Place the ruler against one edge of the panel; or place the straightened metal wire in
the two corners of the panel.
Use the measuring instrument stipulated in 7.5 to measure the maximum deviation
between the ruler (or straightened metal wire) and the panel’s edge, the result shall be
accurate to 0.5mm.
Follow the same method for other edges.
8.5 Determination of flatness
Place the panel on a horizontal surface without any external force; measure the
distance between the whole-surface of the tested panel and the straightened metal
wire; find out the surface distance between the metal wire and maximum deformation
point of the panel; use steel ruler to measure, accurate to 0.5mm.
9 Result Expression
9.1 Thickness
For each tested panel, use the arithmetic mean of each measurement value to express
the thickness, accurate to 0.1mm.
9.2 Length and width
For each tested panel, use the arithmetic mean of each measurement value to express
the length and width, accurate to 1mm.
9.3 Verticality
The result is the maximum measurement value of deviation between the mechanical-
square’s side and the panel’s edge; use the number of millimeters on the edge-length
per meter of panel to express the squareness, accurate to 0.5mm/m.
9.4 Edge straightness
......
| Standard ID | GB/T 19367-2022 (GB/T19367-2022) | | Description (Translated English) | Determination of dimensions of wood-based panels | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B70 | | Classification of International Standard | 79.060.01 | | Word Count Estimation | 10,137 | | Date of Issue | 2022-12-30 | | Date of Implementation | 2023-07-01 | | Older Standard (superseded by this standard) | GB/T 19367-2009 | | Drafting Organization | Wood Industry Research Institute of Chinese Academy of Forestry, Huzhou Inspection and Testing Center, Suzhou Product Quality Supervision and Inspection Institute, Mahogany Fang Furnishing Technology (Huzhou) Co., Ltd., Holy Elephant Group Co., Ltd., Dehua Rabbit Baby Decoration New Material Co., Ltd. , Zhaoqing Yaodonghua Decoration Material Technology Co., Ltd., Zhejiang Academy of Forestry Sciences, Zhejiang Shenghua Yunfeng New Material Co., Ltd., Jiangxi Inspection and Certification General Institute of Industrial Products Inspection and Testing Institute, Nanjing Forestry University, Shanghai Timber Industry Research Institute Co., Ltd., Shanghai Quality Supervision and Inspection Technology Research Institute, Changzhou Inspection and Testing Standard Certification Institute, Quzhou Fangyuanlin Product Inspection and Testing Co., Ltd., Zhaoqing Modern Zhumei Home Furnishing Co., Ltd., Shouguang Luli Wood Industry Co., Ltd., Sophia Home Furnishing Hubei Co., Ltd., Guangxi Zhuang | | Administrative Organization | National Wood-based Panel Standardization Technical Committee (SAC/TC 198) | | Proposing organization | State Administration for Market Regulation, National Standardization Management Committee | | Standard ID | GB/T 19367-2009 (GB/T19367-2009) | | Description (Translated English) | Wood-based panels. Determination of dimensions of panels | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B70 | | Classification of International Standard | 79.060.01 | | Word Count Estimation | 8,828 | | Date of Issue | 2009-05-12 | | Date of Implementation | 2009-11-01 | | Older Standard (superseded by this standard) | GB/T 19367.1-2003; GB/T 19367.2-2003 | | Quoted Standard | GB/T 17657 | | Adopted Standard | ISO 9426-2003, MOD | | Drafting Organization | Institute of Chinese Academy of Forestry Timber Industry | | Administrative Organization | National Standardization Technical Committee plywood | | Regulation (derived from) | National Standard Approval Announcement 2009 No.7 (Total No.147) | | Proposing organization | State Forestry Administration | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the thickness of the various wood-based panels, width, length, verticality, measurement methods edge straightness and flatness. This standard applies to the entire planar plywood. | | Standard ID | GB/T 19367.1-2003 (GB/T19367.1-2003) | | Description (Translated English) | Wood-based panels-Determination of thickness, width and length of boards | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B70 | | Classification of International Standard | 79.060.01 | | Word Count Estimation | 8,832 | | Date of Issue | 2003-11-10 | | Date of Implementation | 2004-05-01 | | Adopted Standard | EN 324-1-1992; MOD | | Drafting Organization | Institute of Wood Industry, Chinese Academy of Forestry | | Administrative Organization | National Standardization Technical Board for Wood - based Panel | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 14 of 2003 (total 62); Announcement of Newly Approved National Standards No. 7 of 2009 (No. 147 overall) | | Proposing organization | State Forestry Administration | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China |
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