LY/T 3131-2019Wood parquet flooring (English PDF)

4.3 According to finishing method

a) paint facing parquet floor;

b) parquet oil parquet flooring;

c) Unpainted parquet floor.

5.1 Grading

According to the appearance quality of the product, it is divided into superior products and qualified products.

5.2 Material requirements

5.2.1 Panel main tree species

Oak, Ash, Black Walnut, Cherry, Teak, Birch, Maple, etc.

5.2.2 Panel thickness

Usually 0.6 mm, 1.0 mm, 1.2 mm, 2.0 mm, 2.5 mm, 3.0 mm, etc.

Note. The panel tree species and thickness can be produced according to the supply and demand agreement.

5.2.3 Base material for parquet floor

Fiberboard shall comply with LY/T 1611-2011, and plywood shall comply with LY/T 1738-2008.

5.3 Appearance quality

5.3.1 The appearance quality of solid parquet flooring shall meet the requirements of Table 1.

Table 1 Appearance quality requirements of parquet

name

positive

back

Top quality product

Live festival

Excluding diameter <=15 mm, 15 mm < diameter < 50 mm, floor length <=760 mm, <=1;

760 mm < floor length<=1200 mm , <=3 Pieces; floor length > 1200 mm, <= 5 pieces Diameter <=50 mm, unlimited number Dead festival Need repair, diameter <=5 mm, Floor length <= 760 mm, not allowed; 760 mm < Floor length<=1200 mm, <=1; floor Length > 1200 mm, <=3 Need repair, diameter <=10 mm, Floor length <=760 mm, <=2;

Floor length > 760 mm, <= 5 Allow repairs, unlimited size or quantity Countersunk Need repair, diameter <=1 mm, Floor length <=760 mm, <=3;

Floor length > 760 mm, <= 5 Need repair, diameter <=2 mm, Floor length <=760 mm, <=5;

Floor length > 760 mm, <= 10 Need to be patched, Diameter <=3 mm, number <=15 Surface crack Need repair, crack length <= 15% of length, Crack width<=0.50 mm, number of pieces<=2 Need repair, crack length <= 20% of length, Crack width<=1.0 mm, number of pieces<=3 Need repair, crack length <= 20%, crack width <=2.0 mm, number of pieces <=3 Resin pouches are not allowed Length <=10 mm, width <=2 mm, <=2 Unlimited Myeloma is not allowed Decay is not allowed Decayed area <= 20%, not peeling, can't twist into powder not allowed Length <= 30% of floor length, wide Degree <= 20% of floor width Processing corrugation is not allowed to be not obvious and unlimited Incomplete tongue is not allowed the length of the missing tenon is <=15% of the total length of the floor.

And the width of the missing tongue does not exceed 1/3 of the tongue width Film scratches must not be inconspicuous--Film bubble bubbling is not allowed--Paint leaks are not allowed--Paint film wrinkle is not allowed--Pinholes in the paint film are not allowed to have a diameter of <=0.5mm, <=3-Paint particles Length <= 760 mm, <= 1; length > 760 mm, <=2 Length <=760 mm, <=3; length > 760 mm, <=5

Note 1. Under natural light or approximate natural light in the range of 300 lx ~ 600 lx (for example, 40 W fluorescent lamp), the viewing distance is 700 mm ~ 1000 mm Defects that cannot be clearly observed by visual inspection are not obvious.

Note 2. Wood parquet oiled wood parquet flooring does not check the surface paint indicators.

Note 3. Live joints, dead joints, surface cracks and processing ripples of non-planar parquet flooring are not required.

5.3.2 The appearance quality of solid wood composite parquet flooring shall meet the requirements of Table 2.

Table 2 Appearance quality requirements of solid wood composite parquet

Name item

positive

back

Top quality product

Dead single maximum diameter/mm not allowed Panel thickness < 2 mm 4 50, panel thickness should be repaired >=2 mm 10 should be patched Holes (including wormholes) Maximum single long diameter/mm 2 is not allowed, 25 should be repaired Light color leather Single length/mm not allowed Unlimited Single width/mm 4 Dark leather Single length/mm not allowed Unlimited Single width/mm 2 Resin capsule and resin (rubber) channel maximum single length/mm is not allowed 5 and maximum single width is less than 1 unlimited Decay-not allowed a Fungal discoloration does not exceed the percentage of the board area /% 20 is not allowed, the color of the board surface should be roughly coordinated and unlimited Cracks-Unlimited Panel stack-not allowed-Bubbling, layering-not allowed Sagging, indentation, bulging-not allowed Patches, patches-not allowed Permeability, the pollution of the board surface does not exceed the percentage of the board area /% Not allowed 1 Unlimited Glitch marks-not allowed Percentage of sand penetration not exceeding board area /% Not allowed 10 Ripples-not allowed to be inconspicuous-Knife marks, scratches-not allowed the maximum single diameter of the film bubble is not more than 0.5 mm. No more than 3 per plate is allowed.

The maximum single diameter of pinholes is not more than 0.5 mm. No more than 3 per plate is allowed.

Wrinkle does not exceed the percentage of the board area /% Not allowed 5-Particles-not allowed to be invisible-Paint leaks-not allowed-Stitching Single width/mm 0.1 0.5-The maximum single length does not exceed the corresponding side Percent of length /% Corner defect of splicing unit-not allowed-Tongue defect does not exceed the percentage of board length /% Not allowed 15-

Note 1. Under natural light or approximate natural light in the range of 300 lx to 600 lx, the line of sight is within 700 mm to 1000 mm, and it is not clear by visual inspection.

Observed defects are not obvious.

Note 2. Wood parquet oiled wood parquet flooring does not check the surface paint indicators.

Note 3. Live joints, dead joints, surface cracks and processing ripples of non-planar parquet flooring are not required.

a Primary rot is allowed.

5.3.3 The appearance quality of laminated wood parquet with impregnated paper shall meet the requirements of Table 3.

Table 3 Appearance quality requirements of impregnated paper laminated wood parquet floor

name

positive

back

Top quality product

Dry and wet flowers are not allowed to exceed 3% of the total surface area.

Surface scratches are not allowed to expose the substrate Surface indentation is not allowed Do not allow through Uneven gloss is not allowed. The total area does not exceed 3% of the board surface.

Stain is not allowed <=10 mm2, 1 per piece is allowed Bubbling is not allowed <=10 mm2, 1 per piece is allowed Drum kits are not allowed <=10 mm2, 1 per piece is allowed Paper tearing is not allowed <=100 mm, 1 place/block is allowed Partial paper shortage is not allowed <=20 mm2, 1 place/block is allowed Collapse is allowed, but it does not affect the decorative effect.

Color mismatch is obviously not allowed Surface cracking is not allowed Layering is not allowed Tongue and splicing unit corner defects are not allowed

5.4 Dimensions and Dimensional Deviations

5.4.1 Specifications

The specifications of wooden parquet floor are as follows.

a) square

Side length. 300 mm ~ 900 mm;

b) Rectangle

Length and width dimensions are processed according to modulus;

c) thickness

8 mm to 22 mm.

Note. Other format sizes can be produced upon agreement between the supply and demand sides.

5.4.2 Dimensional Deviation

The dimensional deviation of wooden parquet floor shall meet the requirements of Table 4.

Table 4 Dimensional deviation of wooden parquet floor

Notes on project requirements Surface net length deviation when the nominal length ln<=500 mm, the absolute value of the difference between ln and each measured value lm is <=0.3 mm 500 mm < nominal length ln <= 1200 mm, absolute difference between ln and each measured value lm <= 0.5 mm, nominal length ln > 1200 mm, absolute difference between ln and each measured value lm <= 1.0 mm

Table 4 (continued)

Notes on project requirements Surface net width deviation Absolute difference between nominal width wn and average width wa <= 0.2 mm the difference between the maximum width wmax and the minimum value wmin <= 0.3 mm Square parquet Board does not make that request Thickness deviation Absolute difference between nominal thickness tn and average thickness ta <= 0.5 mm the difference between the maximum thickness tmax and the minimum tmin <= 0.5 mm Right angle qmax<=0.2 mm Edge straightness<=0.3 mm/m Warpage <=0.20% in width and 1.00% in length Assemble off the seam the average value of assembling and leaving joints oa<=0.15 mm Assembled separation seam max. Omax<=0.20 mm Assembly height difference The average value of the assembly height difference ha<=0.10 mm, the maximum value of the assembly height difference hmax<=0.15 mm Mosaic gap average value of mosaic gap <= 0.2 mm Mosaic height difference <=0.3 mm

Note 1. The test samples should be taken from the intact packaging and unopened packaging.

Note 2. The length and width of wooden parquet flooring refers to the length and width of tongues without tongues.

Note 3. When measuring thickness, the relative highest point should be used as the detection reference point.

Note 4. Non-planar (antique) floor thickness deviation and assembly height difference are not required.

5.5 Physical and chemical performance indicators

5.5.1 The physical and chemical properties of solid wood parquet flooring shall meet the requirements of Table 5.

Table 5 Physical and chemical properties of parquet

Inspection project unit requirements Water content% 6.0 <= Moisture Content <= Equilibrium Moisture Content of Timber in China the difference between the maximum and minimum average moisture content of floor samples in the same batch must not exceed 2.5, and the same the difference between the maximum and minimum moisture content in the plate must not exceed 2.0 Film Adhesion-Cuts and small intersections are allowed to peel off intermittently Surface wear resistance g/100r <=0.12, and the paint film is not worn through Surface resistant to contamination-no trace of contamination Film hardness->=H Mosaic fastness-the panel is facing down, and the mosaic does not fall off

Note 1. The test samples should be taken from the intact packaging and unopened packaging.

Note 2. The wood moisture balance of provinces (regions) and municipalities in China is implemented in accordance with the provisions of Appendix A of this standard.

Note 3. The physical and chemical performance indicators of wooden parquet flooring with inlays are only tested on the wooden material part.

5.5.2 The physical and chemical properties of solid wood composite wood parquet flooring shall meet the requirements of 5.5 in GB/T 18103-2013, and the inlaid fastness shall meet Meet the requirements in Table 5 of this standard.

5.5.3 The physical and chemical properties of impregnated paper laminated wood parquet flooring shall meet the requirements of 5.4 in GB/T 18102-2007.

5.5.4 The paint film adhesion and surface abrasion resistance should be made from flat parts with less dense texture.

5.5.5 Non-planar wooden parquet floor, unpainted wooden parquet floor paint film adhesion, surface abrasion resistance, surface pollution resistance and paint film hardness Make the request.

5.5.6 The physical and chemical properties of non-planar wooden parquet floor shall be tested according to the relevant requirements of LY/T 1859.

5.5.7 The test pieces with balanced grooves on the back plate are not tested for static bending strength and elastic modulus.

6.1 Appearance quality

6.1.1 Calibration tools

6.1.1.1 6x reading magnifier.

6.1.1.2 Steel ruler with a division value of 0.5 mm.

6.1.1.3 Steel tape measure with a length of 3 m and a graduation value of 1.0 mm.

6.1.2 Inspection method

6.1.2.1 Use visual inspection and inspection tools to carry out item-by-item inspection in accordance with the appearance quality requirements of wooden parquet flooring.

6.1.2.2 When visual inspection is adopted, the line of sight should be 700 mm ~ under natural light or approximate natural light in the range of 300 lx ~ 600 lx.

Within 1000 mm.

6.2 Specifications

6.2.1 Calibration tools

6.2.1.1 Steel tape measure with a length of 3 m and a graduation value of 1.0 mm.

6.2.1.2 Steel ruler with a division value of 0.5 mm.

6.2.1.3 Micrometer with a division value of 0.01 mm.

6.2.1.4 Vernier caliper, the division value is 0.02 mm.

6.2.1.5 feeler gauge with a graduation value of 0.02 mm.

6.2.1.6 Right-angle ruler, accuracy class 2.

6.2.2 Mosaic gap and mosaic height difference

Place the wooden parquet floor with inlays on a flat horizontal test bench, and use a feeler gauge to measure the inset gaps and heights of the four points shown in Figure 1.

Low difference, accurate to 0.1 mm. Calculate the average separately to the nearest 0.1 mm.

Fig. 1 Measurement chart of mosaic gap and mosaic height difference

6.2.3 Inspection of other specifications and dimensions of solid wood parquet flooring shall be carried out in accordance with 3.1 of GB/T 15036.2-2018.

6.2.4 Inspection of other specifications and dimensions of solid wood composite wood parquet flooring shall be carried out in accordance with 6.2 of GB/T 18103-2013.

6.2.5 Inspection of specifications and dimensions of laminated wood parquet flooring with impregnated paper shall be performed in accordance with 6.1 of GB/T 18102-2007.

6.3 Physical and chemical properties

6.3.1 The physical and chemical properties of solid parquet flooring shall be tested in accordance with 3.3 in GB/T 15036.2-2018.

6.3.2 The physical and chemical properties of solid wood composite wood parquet flooring shall be tested in accordance with 6.3 of GB/T 18103-2013.

6.3.3 The physical and chemical properties of impregnated paper laminated wood parquet flooring shall be tested in accordance with 6.3 of GB/T 18102-2007.

7.1 Inspection classification

Product inspection includes factory inspection and type inspection.

7.1.1 Factory inspection includes.

a) Appearance quality inspection

b) Size inspection

c) Physical and chemical properties of solid wood parquet flooring Inspection of moisture content, abrasion resistance of paint film surface and paint film adhesion; solid wood composite parquet floor Examination of physical and chemical properties of boards; impregnation peeling and moisture content; physical and chemical properties of impregnated paper laminated wood parquet flooring; water absorption thickness; expansion rate; surface Wear-resistant.

7.1.2 Type inspection includes all inspection items in corresponding product appearance quality, dimensional deviation and physical and chemical properties.

7.1.3 Type inspection shall be carried out in one of the following cases.

a) When there are major changes in raw materials and production processes;

b) Stop production for more than three months and resume production;

c) during normal production, the inspection shall not be less than twice a year;

d) when new products are put into production or converted;

e) When the quality supervision department requests the type inspection.

7.2 Group approval principle

The same shift, the same type of products, the same specifications and a certain number of batches.

7.3 Sampling methods and determination principles

7.3.1 Sampling method

For product quality inspection, samples shall be taken from the same batch of unopened products in accordance with regulations, and the samples shall be inspected one by one.

number.

7.3.2 Inspection of specifications and dimensions

7.3.2.1 Length, width, thickness, surface net length deviation, surface net width deviation, thickness deviation, right angle, edge straightness and warpage the inspection adopts the normal inspection two sampling plan in GB/T 2828.1-2012, the inspection level is I, the receiving quality limit is 4.0, and the sampling the scheme is shown in Table 6.

Table 6 Units of the sampling plan for size

Batch range sample size cumulative sample size acceptance number rejection number <=90 first 3 3 0 1 91 ~ 280 the first second 281 ~ 500 the first second 501 ~ 1.200 the first second 1.201 ~ 3.200 the first second 3.201 ~ 10 000 the first second Note. If the batch exceeds 10 000, it will be treated as another batch.

7.3.2.2 The number of samples for the inspection of the mosaic gap and mosaic height difference, assembly separation seam and assembly height difference are all 10 units, in the same batch of products Random selection, using a sampling plan. If the measured value meets the standard requirements, it is judged as qualified, otherwise it is judged as unqualified.

7.3.3 Appearance quality inspection

7.3.3.1 The normal inspection subsampling plan in GB/T 2828.1-2012 is adopted, the inspection level is II, and the acceptance quality limit is 4.0.

The sampling plan is shown in Table 7.

Table 7 Sampling plan of appearance quality inspection unit is block

Batch range sample size cumulative sample size acceptance number rejection number <=25 first 3 3 0 1 26 ~ 90 the first second 91 ~ 150 the first second 151 ~ 280 the first second

Table 7 (continued) Units are blocks

Batch range sample size cumulative sample size acceptance number rejection number 281 ~ 500 the first second 501 ~ 1.200 the first second 1.201 ~ 3.200 the first second 3.201 ~ 10 000 the first second Note. If the batch exceeds 10 000, it will be treated as another batch.

7.3.3.2 When there are multiple defects on a floor at the same time, it shall be determined according to the defect that affects the product level the most.

7.3.4 Physical and chemical performance test

7.3.4.1 Sampling plan

The sampling plan for physical and chemical performance testing is shown in Table 8. In the initial and retest samples, if the floor size is small, the number of samples can be increased. early when a certain index in the inspection sample fails, the re-inspection is allowed once, and the samples in the same batch of products are doubled for re-inspection.

After the re-inspection, all of them are qualified and judged as qualified; if one of them fails, it is judged as unqualified.

Table 8 Physical and chemical performance sampling plan unit is block

Number of finished products submitted for inspection <=1 000 3 6 > 1 001 6 12

7.3.4.2 Judgment of inspection results

7.3.4.2.1 The physical and chemical properties of the samples of solid wood and wooden parquet floor all meet the standard requirements.

It was judged as unqualified.

7.3.4.2.2 The inspection results of solid wood composite wood parquet floor shall be determined in accordance with the provisions of 7.2.4.2 in GB/T 18103-2013.

7.3.4.2.3 The inspection results of the impregnated paper laminated wood parquet floor shall be determined in accordance with the provisions of 7.3.4.3 of GB/T 18102-2007.

7.3.4.2.4 The mounting fastness of the floor sample meets the requirements of the standard. The mounting fastness of the floor sample is judged to be acceptable, otherwise it is judged to be inconsistent.

grid.

7.4 Comprehensive judgment

When the sample's appearance quality, specifications and physical and chemical performance inspection results meet the requirements of the corresponding grade, it is judged to be qualified, otherwise it is degraded or judged Failed.

8.1 Logo

8.1.1 Product marking

Before the product is put in storage, the traceability information of the product should be marked at the appropriate place.

8.1.2 Packaging label

The package label should have the factory name, address, product name, implementation standard number, production date, specification model, grade, and formaldehyde release Limited mark and signs of moisture and sun protection.

8.2 Packaging

The product shall be packed separately according to the product category, specification and grade when it leaves the factory, and there shall be installation and operation manuals and product certifications in the package.

The packaging must be protected from bumps, scratches and stains. Packaging requirements can also be negotiated between the supply and demand sides.

8.3 Transport and storage

Products should be stacked flat during transportation and storage to prevent contamination and must not be exposed to moisture, rain and exposure.

During storage, they should be stacked separately according to category, specification and grade, and each pile should be marked accordingly.

Appendix A

(Normative appendix) Balanced moisture content of wood in provinces (autonomous regions) and municipalities in China

Table A.1. Timber equilibrium moisture content of provinces (autonomous regions) and municipalities in China

Province (region), municipality name Wood moisture balance (average value)% Pr...