T/CNFPIA 3037-2024 Custom-made wooden cabinet quality classification

Scope

Scope: This document defines the terminology and definitions of quality grading for custom-made wooden cabinets, and describes the requirements, testing methods, judgment rules, and grading marks. This document applies to the quality grading of custom-made wooden cabinets for indoor use. Main technical content: 4.1 Basic requirements: In addition to the grading requirements specified in this document, other basic requirements shall comply with the provisions of GB/T 39390-2023 Chapter 4. 4.2 Grading requirements: Custom-made wooden cabinets are divided into three grades (AAAAA, AAAA, AAA) based on the corrosion resistance of their load-bearing components, hardware fittings, connectors, and accessories; the strength of hanging rod supports; the durability of sliding components; the durability of sliding doors; the limit of harmful substances; and the 90° peel strength and sealing performance of edging. The grading requirements shall comply with the relevant provisions of Table 1. Table 1: Grading requirements for custom-made wooden cabinets Item Requirements AAAAA AAA AA 1 Static bending strength of load-bearing components (MPa) ≥13.0 ≥12.0 ≥11.0 2 Water absorption thickness and expansion rate after 24h (%) ≤14.0 ≤16.0 ≤18.0 3 Grip screw force (N) ≥1000 ≥700 ≥950 ≥650 4 Corrosion resistance of hardware fittings, connectors, and accessories 48h,≥9 grades 24h,≥9 grades 18h,≥9 grades 5 Strength of hanging rod supports (kg/dm) ≥5 ≥4.5 ≥4 6 Durability of sliding components (times) ≥8 ≥6 ≥7 7 Durability of sliding doors (times) ≥8 ≥6 ≥7 8 Limit of harmful substances Formaldehyde emission (mg/m3) ≤0.025 ≤0.050 ≤0.124 Benzene (mg/m3) ≤0.002 ≤0.010 ≤0.016 Toluene (mg/m3) ≤0.100 ≤0.120 ≤0.150 Xylene (mg/m3) ≤0.100 ≤0.150 ≤0.200 Total volatile organic compounds (TVOC) (mg/m3) ≤0

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