GB/T 15035-2023
Terminology in wood drying (English Version)
- Standard No.
- GB/T 15035-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 15035-2023
- Replace
- GB/T 15035-2009
- Introduction
Core changes in the standard revision
Technical fields Number of terms in the 2009 version New terms in the 2023 version Updates to key technologies Drying methods 31 2 Added High temperature heat treatment (160-230℃), Ultrasonic assisted vacuum drying Drying facilities 35 4 New class=instrument>Heat treatment kiln, solar collector technical parameters Drying process 46 3 Supplementary pretreatment, constant speed/deceleration drying stage definition
Analysis of key technical terms
3.1 Drying method
High temperature heat treatment (3.1.32): Treating wood in a low oxygen environment of 160-230℃ can improve dimensional stability. For example, the tangential shrinkage of oak wood can be reduced by 40% after heat treatment.
Conventional drying (3.1.7): Specify that the medium temperature is ≤100℃, and distinguish between steam/hot water/electric heating and other heat media forms.
3.2 Drying facilities
Wood drying room (3.2.1): Emphasis on thermal insulation and corrosion resistance performance requirements. The metal shell drying room must be equipped with a 0.5mm thick stainless steel inner plate.
3.3 Drying process
Drying benchmark (3.3.4): Recommended applicable scenarios for moisture content benchmark (divided into 6-8 stages) and time benchmark (divided into 4 stages):
- Hardwood: semi-fluctuation benchmark is recommended
- Fast-growing wood: continuous temperature rise benchmark is applicable
Implementation suggestions
Drying quality control
Based on the Drying uniformity (3.5.70) indicator:
• The moisture content deviation of room-dried wood should be ≤±2%
• The deviation of air-dried wood is allowed to be ±4%Equipment selection guide
High-frequency vacuum dryer (3.2.22) is applicable to:
• Hardwood with thickness > 50mm
• Special orders requiring drying cycle <72hAnalysis of Standard Evolution
The 1994 edition first established the terminology system → The 2009 edition added a chapter on drying theory → The 2023 edition supplemented combined drying technology and quality control indicators, reflecting the industry's development towards precise control.
GB/T 15035-2023 history
- 2023 GB/T 15035-2023 Terminology in wood drying
- 2009 GB/T 15035-2009 Terminology in wood drying
- 1994 GB/T 15035-1994 Terminology in wood drying
