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Grain storage - Code of practice for low temperature storage
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Basic data
| Standard ID | GB/T 44744-2024 (GB/T44744-2024) |
| Description (Translated English) | Grain storage - Code of practice for low temperature storage |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | B20 |
| Classification of International Standard | 67.060 |
| Word Count Estimation | 8,841 |
| Date of Issue | 2024-10-26 |
| Date of Implementation | 2025-05-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 44744-2024: Grain storage - Code of practice for low temperature storage
---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/GBT44744-2024
ICS 67.060
CCSB20
National Standard of the People's Republic of China
Grain storage - Technical regulations for low temperature storage of grain
Released on October 26, 2024
Implementation on May 1, 2025
State Administration for Market Regulation
The National Standardization Administration issued
Preface
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was submitted by the State Administration of Grain and Material Reserves.
This document is under the jurisdiction of the National Technical Committee on Standardization of Cereals and Oils (SAC/TC270).
This document was drafted by. Henan University of Technology and China National Grain and Oils Corporation Chengdu Storage Research Institute Co., Ltd.
The main drafters of this document are. Huang Yawei, Wang Ruolan, Wang Yanyan, Tian Shupu, Bian Ke, Fu Pengcheng, Bai Xuguang, and Li Haojie.
Grain storage - Technical regulations for low temperature storage of grain
1 Scope
This document establishes the operating procedures for low temperature grain storage, and stipulates the insulation treatment of grain storage warehouses, grain storage, lowering grain temperature, low temperature sealing,
The document provides operational instructions for stages such as management during the closure period and grain delivery, and describes the verification methods for operations at each stage.
This document is applicable to low-temperature grain storage in room-type warehouses, vertical silos, shallow round silos and underground warehouses with certain insulation performance.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 4706.32 Safety of household and similar electrical appliances Part 32.Particular requirements for heat pumps, air conditioners and dehumidifiers
GB/T 7725 Room air conditioners
GB/T 9237 Safety and environmental requirements for refrigeration systems and heat pumps
GB/T 17981 Economic operation of air conditioning systems
GB/T 20569 Rules for determining storage quality of rice
GB/T 20570 Rules for determining storage quality of corn
GB/T 20571 Rules for determining storage quality of wheat
GB/T 29374 Technical specification for the application of grain coolers for grain and oil storage
GB/T 29890 Technical Specification for Grain and Oil Storage
GB/T 31785 Rules for determining soybean storage quality
LS/T 1202 Technical Specification for Mechanical Ventilation of Stored Grain
3 Terms and Definitions
There are no terms or definitions that require definition in this document.
4 Basic Requirements
4.1 Low-temperature storage room
4.1.1 The heat transfer coefficient of the enclosure structure of the cryogenic warehouse shall comply with the requirements of GB/T 29890.The heat transfer coefficient K value of the enclosure structure and its calculation method shall be
See Appendix A.
4.1.2 There should be a moisture-proof treatment layer, which should be placed on the periphery of the thermal insulation material. The moisture-proof layer and the thermal insulation layer should maintain integrity and continuity.
It is able to withstand thermal expansion and side pressure of grain pile without deformation.
4.1.3 The airtightness of the cryogenic storage chamber shall comply with the requirements of GB/T 29890.
4.2 Food quality
4.2.1 Paddy rice shall comply with the requirements of GB/T 20569.
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