GB/T 2440-2017: Translated English of Chinese Standard. (GBT 2440-2017, GB/T2440-2017, GBT2440-2017): Urea
https://www.chinesestandard.net, Nov 9, 2018 - Science - 15 pages
This standard specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation and storage of urea. This standard applies to agricultural (fertilizer) urea and industrial urea which are produced by the synthesis of ammonia and carbon dioxide. For the sulfurcoated urea, urea for AUS32, urea for raw materials with national standards or industry standards, it shall implement the corresponding standards.
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Terms and definitions
Appendix A Informative Calculation method of size guide number SGN and uniformity index UI
Common terms and phrases
address residence agricultural fertilizer average particle bags Total number batch number batch of products Biuret content calculated according calculation method date of manufacture Determination of urea equivalent to SGN exit-factory inspection formaldehyde fraction of biuret guide number HG/T hydroxide standard titration industrial urea inspection items Inter-sieve pore-size difference large particle large particle size marked as required meet the requirements method of SGN Methylene diurea minimum number Moisture name of product number of bags number of packages number of sampling number or date packaging container performed according Proportion of small-pore-size provisions of GB/T Qualified product Mass quality certificate range of particle raw materials sampling bags SGN value size guide number size L small particle small particle size sodium hydroxide standard Spectrophotometric method GB/T standard number standard titration solution supplier Taylor sieve system terms and definitions Total nitrogen content transportation and storage type inspection uniformity index urea products Water insoluble