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GB/T 13521-1992 PDF in English

GB/T 13521-1992 (GB/T13521-1992, GBT 13521-1992, GBT13521-1992)
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GB/T 13521-1992: PDF in English (GBT 13521-1992)

GB/T 13521-1992
UDC 683.53
A 82
GB/T 13521-92
Crown cap
ISSUED ON. JUNE 12, 1992
Issued by. State Bureau of Technical Supervision
Table of Contents
1  Main content and application scope ... 3 
2  Reference standards ... 3 
3  Product structure and basic dimension ... 3 
4  Technical requirements ... 4 
5  Test methods ... 5 
6  Inspection rules ... 6 
7  Marks, packaging, transportation, and storage ... 7 
Additional Explanation... 8 
National Standard of the People’s Republic of China
GB/T 13521-92
Crown cap
1  Main content and application scope 
This Standard specifies the basic dimension, technical requirements, test methods, inspection
rules, marks, packaging, transportation, and storage of bottle caps which are for beverages
such as beer and soft drinks, and which are made of electro-tinned (or electro-chromed)
This Standard applies to the bottle cap for sealing which complies with GB 10809.
2  Reference standards 
GB 2520 Cold-reduced electrolytic tinplate
GB 2828 Sampling procedures and tables for lot-by-lot inspection by attributes
GB 9681 Hygienic standard of products of polyvinyl chloride for food packaging
GB 5009.67 Method for analysis of hygienic standard of product of polyvinyl chloride for
food packaging
GB 10809 Glass container - dimension of crown bottleneck
3  Product structure and basic dimension 
3.1 Structure is shown in below figure.
3 4.3.2 5.3.2
Category C
4.1.1 5.1.1
4.2.1 5.2.1
4.2.2 5.2.2
4.2.3 5.2.2
4.2.4 5.2.2
4.4.2 5.4.2
4.4.3 5.4.3
6.5 Inspection level IL = S-3.
6.6 Sampling plan type. 1-time sampling plan for normal inspection.
6.7 Judgment procedures
6.7.1 Take samples randomly in accordance with sampling plan.
6.7.2 Inspect the samples according to Table 3. Except the Category A, the statistics of
nonconformance products shall be in accordance with the specifications of GB 2828. The
judgment of batch conformance/nonconformance shall be performed according to the
judgment groups of sampling plan.
6.7.3 Unqualified batch products of Category A must not leave factory. The manufacturer of
the product shall carry out full inspection or rework process. Then re-submit to inspection. The
products can only leave the factory after passing the inspection.
6.7.4 Batch of products which have been judged as Category B, Category C unqualified
products may be handled by both Supplier and Purchaser through negotiation.
7  Marks, packaging, transportation, and storage 
7.1 Package box or bag shall be accompanied with a qualified label. It shall contain
production unit, product name, built-in number, production date, factory date, and storage
period. Packing quantity per unit is less than or equal to 10,000.
7.2 Bottle caps must be packaged with polyethylene bags firstly. And outer surface shall be
packaged with woven bag, carton box or in other way according to user requirements.
7.3 Means of transport must be clean and dry. Rain, snow invasion and product packaging
breakage shall be avoided during transportation.
7.4 Finished products’ warehouse shall be dry and well ventilated. There shall be no contact
with corrosive and toxic chemicals in the process of handling and storage.
7.5 Under the above specified conditions, the storage life is one year.
Additional Explanation. 
This Standard was proposed by Ministry of Light Industry of the People’s Republic of China.
This Standard is responsibly drafted by the Packaging Science Research Institute of Ministry
of Light Industry.
The main drafters of this Standard are Yin Xiaohong, Zeng Muxuan, Long Guohua, Pang
Weiping, and Xia Chunxuan.
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.