This standard applies to the purchase, sale, transfer, storage, processing and export of commercial tung oil. GB 8277-1987 Tung Oil GB8277-1987 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Tung oil
This standard applies to the purchase, sale, allocation, storage, addition and withdrawal of commercial tung oil. 1 Technical requirements
Tung oil should have the following characteristic constants:
1.1 Specific gravity (20/4C): 0.9360-0.9395.1.2 Refractive index (20℃): 1.5185~1.5225.1.3 Iodine value (Weigu method): 163~173.1.4 Saponification value: 190~195.
UDC 665.345.6
GB 8277--87
1.5 Thermal polymerization test (Washington test): 282℃, solidified within 7min30s, not sticky when cut, and broken when pressed. 2 Grade index
2.1 The grade index of tung oil is shown in the following table:
Color (1-inch slot of Rowe colorimeter)
Transparency (standing for 24h at 20℃)
Acid value (mgKOHig)
Water and volatile matter, %
Impurities, %
β-tung oil test
(after 24h at 3.3~4.4C)
2.2 Tung oil is priced based on grade 2.
2.3 All grades of tung oil shall not contain idiotic oil. Grade 2
Have the normal smell of tung oil,
No crystal precipitation
2.4 All grades of tung oil shall not be mixed with mineral oil, "Songfei" and other types of oil. Approved by the Ministry of Commerce of the People's Republic of China on October 17, 1987
Permitted to be slightly turbid
No crystal precipitationbZxz.net
No peculiar smell
Permitted to be slightly turbid
No crystal precipitation
Implemented on April 1, 1988
3 Inspection method
GB 8277-87
3.1 The sampling of tung oil samples shall be carried out in accordance with GB5524-85 "Testing and splitting of samples for testing vegetable oils and fats". 3.2 The determination of specific gravity shall be carried out in accordance with GB5526--85 "Determination of specific gravity for testing vegetable oils and fats". 3.3 The determination of refractive index shall be carried out in accordance with GB5527-85 "Determination of refractive index for testing vegetable oils and fats". 3.4 The determination of iodine value shall be carried out in accordance with GB5532-85 "Determination of iodine value for testing vegetable oils and fats". 3.5 The determination of electrochemical value shall be carried out in accordance with GB5534-85 "Determination of saponification value for inspection of vegetable oils and fats". 3.6 The thermal polymerization test (Washington test) shall be carried out in accordance with GB5539-85 "Qualitative test for inspection of vegetable oils and fats". 3.7 The identification of color, transparency and odor shall be carried out in accordance with GB5525-85 "Identification method for transparency, color, odor and taste for inspection of vegetable oils and fats".
3.8 The determination of acid value shall be carried out in accordance with GB5530-85 "Determination of acid value for inspection of vegetable oils and fats". The determination of moisture and volatiles shall be carried out in accordance with GB5528-85 "Determination of moisture and volatiles for inspection of vegetable oils and fats". 3.9
The determination of impurities shall be carried out in accordance with GB5529-85 "Determination of impurities for inspection of vegetable oils and fats". 3.10
β-palm oil test shall be carried out in accordance with GB5539--85 "Qualitative test for inspection of vegetable oils and fats". 3.11
The adulteration test of tung oil shall be carried out in accordance with GB5539-85. Packaging, transportation and storage
The packaging, transportation and storage of tung oil must meet the requirements of quality assurance, quantity assurance, transportation safety and graded storage. Tung oil containers must have obvious "Tung Oil" logos. The gross weight, net weight and ex-factory date must be indicated. Additional remarks:
This standard is proposed and coordinated by the Grain Storage and Transportation Bureau of the Ministry of Commerce. This standard is drafted by the Sichuan Provincial Grain Bureau and the Shaanxi Provincial Grain Bureau. This standard is entrusted to the Inspection Department of the Grain Storage and Transportation Bureau of the Ministry of Commerce for interpretation. 156
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