GB/T 18103-2022 PDF English
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| GB/T 18103-2022 | English | 260 |
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Engineered wood flooring
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| GB/T 18103-2013 | English | 135 |
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GB/T 18103-2022: Engineered wood flooring---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18103-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 79.080
CCS B 70
Replacing GB/T 18103-2013
Engineered Wood Flooring
Issued on. DECEMBER 30, 2022
Implemented on. JULY 1, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 6
2 Normative References... 6
3 Terms and Definitions... 7
4 Classification... 9
5 Requirements... 10
5.1 Requirements for Raw Materials... 10
5.2 Requirements for Appearance Quality... 11
5.3 Specifications, Dimensions and Deviations... 13
5.4 Physical and Chemical Properties... 14
6 Inspection Methods... 15
6.1 Inspection Method for Appearance Quality of Planar Engineered Wood Flooring... 15
6.2 Inspection Methods for Specifications, Dimensions and Deviations of Planar
Engineered Wood Flooring... 16
6.3 Inspection Methods for Physical and Chemical Properties of Planar Engineered Wood
Flooring... 20
6.4 Inspection Method for Nonplanar Engineered Wood Flooring... 24
6.5 Inspection Method for Engineered Wood Flooring for Underfloor Heating... 24
7 Inspection Rules... 24
7.1 Classification of Inspection... 24
7.2 Sampling Method and Determination Principle... 25
7.3 Comprehensive Determination... 28
7.4 Inspection Report... 28
8 Labeling, Packaging, Transportation and Storage... 29
8.1 Product and Packaging Labeling... 29
8.2 Packaging... 29
8.3 Transportation and Storage... 29
Bibliography... 30
1 Scope
This document defines the terms and definitions of engineered wood flooring, and specifies the
classification, requirements, inspection methods, inspection rules, labeling, packaging,
transportation and storage.
This document is applicable to engineered wood flooring.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2828.1-2012 Sampling Procedures for Inspection by Attributes - Part 1.Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 4823-2013 Defects in Sawn Timber
GB/T 15036.1-2018 Solid Wood Flooring - Part 1.Technical Requirements
GB/T 15036.2-2018 Solid Wood Flooring - Part 2.Examination Methods
GB/T 17657-2022 Test Methods of Evaluating the Properties of Wood-based Panels and
Surface Decorated Wood-based Panels
GB 18580 Indoor Decorating and Refurbishing Materials - Limit of Formaldehyde Emission of
Wood-based Panels and Finishing Products
GB/T 28999-2012 Multilaminar Decorative Veneer
GB/T 39600 Formaldehyde Emission Grading for Wood-based Panel and Finishing Products
GB/T 41547-2022 Wood-based Flooring for Underfloor Heating
HJ 571-2010 Technical Requirement for Environmental Labeling Products - Wood Based
Panels and Finishing Products
3 Terms and Definitions
What is defined in GB/T 4823-2013, and the following terms and definitions are applicable to
this document.
3.1 engineered wood flooring
Flooring made of solid wood panels or veneers (including restructured decorative veneers) as
the panel, solid wood panels, veneers or plywood as the core layer or bottom layer, and
laminated in different combinations.
3.2 two-layer engineered wood flooring
Two-layer-structured solid wood composite flooring with solid wood panels or veneers
(including restructured decorative veneers) as the panel, and solid wood panels or veneers as
the bottom layer.
3.3 three-layer engineered wood flooring
Three-layer-structured solid wood composite flooring with solid wood panels or veneers
(including restructured decorative veneers) as the panel, and solid wood panels as the core layer
and veneers as the bottom layer.
3.4 multi-layer engineered wood flooring
Multi-layer (with more than 3 layers) structured solid wood composite flooring with solid wood
panels or veneers (including restructured decorative veneers) as the panel, and plywood as the
base material, or solid wood panels or veneers (including restructured decorative veneers) as
the panel, and solid wood panels or veneers as the core layer or bottom layer.
3.5 nonplanar engineered wood flooring
Solid wood composite flooring with uneven surfaces, such as. saw marks and drawings, etc.
3.6 classic tongue-and-groove joint engineered wood flooring
Solid wood composite flooring with right-angled tenons and grooves on the sides and ends.
4 Classification
4.1 Classification in accordance with the panel material.
4.2 Classification in accordance with the structure.
4.3 Classification in accordance with the coating mode.
4.4 Classification in accordance with the surface shape.
4.5 Classification in accordance with whether it is suitable for ground radiant heating places.
4.6 Classification in accordance with whether it is locked and spliced.
5 Requirements
5.1 Requirements for Raw Materials
5.1.1 Panel
5.1.2 Solid wood panel
5.1.2.1 The wood species for the core layer of flooring in the same batch shall be of the same
species or have similar properties.
5.1.2.2 The gap between the core-layer laths shall not be greater than 3 mm.
5.1.3 Plywood for engineered wood flooring
It shall comply with the stipulations of LY/T 1738.
5.2 Requirements for Appearance Quality
5.2.1 Appearance quality of planar engineered wood flooring
The appearance quality of planar engineered wood flooring shall comply with the stipulations
of Table 1.Specifically speaking, the front-side appearance quality of engineered wood flooring
with restructured decorative veneers as the panel shall comply with the stipulations of 5.1 in
GB/T 28999-2012.
5.2.2 Appearance quality of nonplanar engineered wood flooring
It shall comply with the relevant stipulations of LY/T 1859.
5.3 Specifications, Dimensions and Deviations
5.3.1 Specifications and dimensions
The commonly seen specifications and dimensions of engineered wood flooring are as follows.
5.3.2 Dimensional deviations of planar engineered wood flooring
They shall comply with the stipulations of Table 2.
5.3.3 Dimensional deviations of nonplanar engineered wood flooring
They shall comply with the stipulations of LY/T 1859.When the floor shape is square, the
surface-layer net length deviation and surface-layer net width deviation shall be agreed upon
by both the supply-side and the demand-side.
5.4 Physical and Chemical Properties
5.4.1 Physical and chemical properties of planar engineered wood flooring
5.4.2 Physical and chemical properties of nonplanar engineered wood flooring
5.4.2.1 The formaldehyde release and locking strength of nonplanar engineered wood flooring
shall comply with the stipulations of Table 3, and the other physical and chemical properties
shall comply with the stipulations of LY/T 1859.
5.4.2.2 For the nonplanar engineered wood flooring for underfloor heating, the locking strength
shall comply with the stipulations of Table 3, the heating performance and formaldehyde release
shall comply with the stipulations of GB/T 41547-2022, and the other physical and chemical
properties shall comply with the stipulations of LY/T 1859.
6 Inspection Methods
6.1 Inspection Method for Appearance Quality of Planar Engineered Wood
Flooring
6.1.1 Measuring tools
6.1.2 Inspection of appearance quality of planar engineered wood flooring
6.1.2.1 Adopt visual inspection and measuring tools to inspect the appearance quality of the
floor surface item by item.
6.1.2.2 When adopting visual inspection, the visual distance shall be within 700 mm ~ 1,000
mm under natural light or near natural light (for example, 40 W fluorescent lamp) with an
illumination in the range of 300 lx ~ 600 lx. The inspection personnel shall have normal vision
(or corrected to normal vision), without color blindness or color weakness.
6.1.2.3 Inspect the floor piece by piece, and in accordance with the stipulations of 5.3, determine
its grade. When there is a dispute, three people shall jointly participate in the inspection, and
the majority of the same conclusions will be the inspection result.
6.2 Inspection Methods for Specifications, Dimensions and Deviations of Planar
Engineered Wood Flooring
6.2.1 Measuring tools
6.2.1.1 Steel measuring tape, with a division value of 1.0 mm; select the measuring range in
accordance with the size of the test piece.
6.2.1.2 Steel ruler, with a division value of 0.5 mm; select the measuring range in accordance
with the size of the test piece.
6.2.1.3 Micrometer, with a division value of 0.01 mm; select the measuring range in accordance
with the size of the test piece.
6.2.1.4 Digital display vernier caliper, with a division value of0.01 mm; select the measuring
range in accordance with the size of the test piece.
6.2.1.5 Feeler gauge, with a thickness of 0.01 mm ~ 1.00 mm.
6.2.1.6 Right angle square, 200 mm 300 mm, accuracy level 1.
6.2.2 Inspection of specifications, dimensions and deviations of planar engineered wood
flooring
6.2.2.1 Inspection of surface-layer net length deviation
The length of the floor refers to the net length (l) of the floor surface, measured with a steel
measuring tape on both sides of the floor width direction and 20 mm away from the edge of the
floor, accurate to 1 mm, as shown in Figure 1.Calculate the absolute value of the difference
between the nominal length (ln) and each length measured value (lm), accurate to 1 mm.
6.2.2.4 Right angle (q) measurement
One side of the right angle square is close to the long side of the floor. Use a feeler gauge to
measure the maximum distance (qmax) between the other side of the right angle and the end of
the floor, accurate to 0.01 mm, as shown in Figure 4.
6.2.2.5 Measurement of edge straightness (s)
Along the length direction of the floor, use a steel ruler close to the two adjacent corners of the
floor, and use a feeler gauge or steel ruler to measure the maximum chord height (smax) between
the edge of the panel and the steel ruler, accurate to 0.01 mm, as shown in Figure 5.The ratio
of the maximum chord height (smax) to the measured floor length (l) is the lengthwise edge
straightness (s), accurate to 0.01 mm/m.
6.2.2.6 Measurement of warp degree (f)
6.3 Inspection Methods for Physical and Chemical Properties of Planar Engineered Wood Flooring
6.3.1 Requirements for preparation, dimensions and quantity of test pieces
6.3.1.1 The sample shall be taken from products stored for more than 24 hours after production.
6.3.1.2 Randomly select no less than 2 floorboards from the sample as specimens. The
preparation position (except for the locking strength, all are prepared from the specimens after
removing the tongue and groove), dimensions, specifications and quantity of the test piece shall
comply with the requirements of Figure 9 and Table 4.When sawing the test piece, defects shall
be avoided.
6.3.2 Determination of impregnation stripping
6.3.2.1 Principle
Determine whether the glue layer is stripped after the test piece is impregnated and dried, and
the degree of stripping.
6.3.2.2 Instruments and measuring tools
7 Inspection Rules
7.1 Classification of Inspection
7.1.1 Product inspection is divided into exit-factory inspection and type inspection.
7.1.2 The inspection items of exit-factory inspection are determined in accordance with the
product type (such as. planar engineered wood flooring, nonplanar engineered wood flooring
and engineered wood flooring for underfloor heating).
7.1.3 Type inspection includes all relevant inspection items in Chapter 5.During normal
production, type inspection shall be carried out no less than once a year. Under one of the
following circumstances, type inspection shall be carried out.
7.2 Sampling Method and Determination Principle
7.2.1 Principle of group batch
Products of the same batch, same specifications and same category are considered as one batch.
7.2.2 Sampling method and determination principle of planar engineered wood flooring
and nonplanar engineered wood flooring
7.2.2.1 Sampling method and determination principle of appearance quality
7.2.2.1.2 On a floorboard, when there are multiple defects at the same time, determine in
accordance with the defect that affects the product grade the most.
7.2.2.2 Sampling method and determination principle of specifications, dimensions and
deviations
7.2.2.3 Sampling method and determination principle of physical and chemical properties
7.2.3 Sampling method and determination principle of engineered wood flooring for
underfloor heating
In accordance with the stipulations of 7.3 in GB/T 41547-2022.
7.3 Comprehensive Determination
When the inspection results of appearance quality, specifications, dimensions, deviations,
physical and chemical properties and underfloor heating performance (if applicable) satisfy the
requirements in the standards for labeled products, the batch of products shall be determined as
qualified, otherwise, the batch of products shall be determined as disqualified.
7.4 Inspection Report
The content of the inspection report shall include.
8 Labeling, Packaging, Transportation and Storage
8.1 Product and Packaging Labeling
Before entering the warehouse, the name and address of the manufacturer, product name, the
standard being implemented, production date / batch No., trademark, specifications and model,
panel tree species (except the engineered wood flooring with parquet and restructured
decorative veneers as the panel), panel thickness, level of formaldehyde release, category and
quantity, etc. shall be marked on the appropriate parts, or packaging or label of the product. The
product barcode and QR code can be marked on the product labeling.
8.2 Packaging
When products are exiting the factory, they shall be respectively packed in accordance with the
product category, specifications and levels. The certificate of conformity, Chinese installation
and instruction manuals shall be provided. The packaging shall prevent the products from
collision, scratches and stains.
8.3 Transportation and Storage
The products shall be flat stacked in the process of transportation and storage to prevent stains,
and shall be prevented from moisture, rain or exposure to the sun.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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