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Multiple Wood Flooring Standards GB/T 18103-2000

Standard Specification for Engineered Wood Flooring , Engineered Wood Flooring Appearance, Engineered Wood Flooring Quality Requirements.

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QUALITY CONTROL STANDARD-ENGINEERED WOOD FLOORING



SCOPE

This standard specifies the definition, category, technical requirements, testing manners,rules of inspection, marks, package, transportation and storage of Parquet flooring.

 

Size and Deviation

Thickness difference: The absolute value of the difference between nominal thickness tn and average thickness ta shall ≤0.5mm;The maximum thickness tmax and minimum thickness tmin shall ≤0.5mm

Difference of clear width of the surface layer: The absolute value of the difference between nominal width and average width shall shall ≤0.1mm; The difference between maximum width and minimum width shall≤0.2mm

Difference of clear length of the surface layer: Nominal length ln≤1500mm, the absolute value of the difference between ln and every measured lm shall ≤1.0mm. Nominal length  1500mm, the absolute value of the difference between ln and every measured lm shall ≤2.0mm

Straightness: qmax≤0.2mm

Straightness of the edges: smax≤0.3mm/m

Warp: Convex warp fw in width direction shall ≤0.20%; concave warp fw shall ≤0.15% .Convex warp fl in length direction shall≤1.00%;concave warp fl≤0.50%

Assembled gap: Average assembled gap oa≤0.15mm. Maximum assembled gap omax≤0.20mm

Assembled high difference: Average assembled high difference ha≤0.10mm. Maximum Assembled high difference hmax≤0.15mm


The Appearance Quality Requirements

Name

Surface

Back face

Superior

First class

Qualified

 

Dead knot

not allowed

Maximum single diameter 2mm 

Maximum single diameter 4  mm

Maximum single diameter 50mm

Holes(include)

not allowed

needs repair work

Maximum single diameter 15mm

Light bark pocket

not allowed

Maximum single length 20mm

Maximum single length 30mm

Unlimited

Maximum single width 2mm

Maximum single width 4mm

Resin pocket and resin

duct

not allowed

Maximum single length 5mm. and the maximum single width1

Unlimited

Decay

 

not allowed

 

Color variation

not allowed

the area of flooring board 5%, the gloss of surface shall be harmonious

the area of flooring board 20%, the gloss of surface shall be generally harmonious

Unlimited

Split

 not allowed

Unlimited

Assembled gap

Transverse splicing

Maximum single width 0.1mm

Maximum single width 0.2mm

Maximum single width0.5mm

Unlimited

Maximum single length shall the length of board 5%

Maximum single length shall  the length of board 10%

Maximum single length shall  the length of board 20%

Longitudinal splicing

Maximum single width 0.1mm

Maximum single width 0.2mm

Maximum single width 0.5mm

Folded layers

not allowed

Unlimited

Blister, layering

not allowed

Dent, press mark,bubbling

not allowed

 it is allowed if not too obvious

it is allowed if not too obvious

Unlimited

Use of repair bar or patch

 not allowed

Unlimited

Burr mark

not allowed

Unlimited

Infiltration of glue, surface contamination

not allowed

1% of flooring area

Unlimited

Knife marks, scratches

 not allowed

Unlimited

Cutted and chatter mark

not allowed

it is allowed if not too obvious

 

Knife marks, scratches

 not allowed

Unlimited

Losses of edges and sides

 not allowed

 

Blister of coating

not allowed

3 pcs on each floor board

 

Pin hole

not allowed

3 pcs on each floor board

 

Wrinkling

not allowed

area of flooring 5%

 

Fib

not allowed

it is allowed if not too obvious

 

Exposed undercoat

 

not allowed


*) Initial decay is allowed, but no peeling problems or powder shall exist.

**) Losses on the long side shall not exceed 30% the length of the board, and shall not exceed 5mm; Losses on the short side shall ot exceed 20% the width of the board, and shall not exceed 5mm.


Physical and Chemical Performance Requirements

Inspection Items

Superior

First-class

Qualified

Dip peeling test

The cumulative unglued length of any glued layer on each side shall not exceed 1/3 the length of the glued layer(3mm or less can be ignored)

Modulus of rupture(MOR)

≥30Mpa

Modulus of Elasticity(MOE)

≥4000Mpa

Moisture content

5~14%

Adhesion of coating

A few sporadic peeling spots are allowed alongside cutting marks and its surounding intersection area.

Wear resistance of surface

≤0.08,and the coating does not grind through

≤0.15,and the coating does not grind through

Stain resistance of surface

No stain marks

Release of formaldehyde

Category A:≤9mg/100g;Category B:>9~40mg/100g


Marks、Package、Transportation and Storage


Product Marks

Before the products are stored, the name of manufacturer, factory address, product name, wood variety, model number, brand, production date and category, grade, spefication and etc shall be marked on proper position.


Package Labels

Factory name, address, production date, production name, wood variety, quantity, anti-dampness, anti-sunlight marks shall be found on the package labels.


Package

When the products leave the factory,they shall be wrapped separately according to their specification and grade, and a detailed Chinese version of installation & maintenance instructions shall be provided based on the characteristics of products.The package shall be able to protect the products from collision, scratches and stains. The requirements for package can be determined after discussion between both parties.


Transportation and Storage

Products shall be piled up tidily during delivery & package process, and free from contamination,dampness rain and direct exposure to sunlight.

Products with different varieties, specifications and grades shall be separately stored, and every stack shall bear its special mark on it.

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