General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB/T 19851.5-2005
Scope
This part of GB/T 19851 specifies the classification, specifications, requirements, test methods, marking, packaging, transportation and storage of volleyball for primary and secondary school students. This section applies to volleyballs used in primary and secondary schools that are made of rubber veneer with reinforcing layer and processed by hand (mechanical) sewing and gluing.
GB/T 19851.5-2005 Referenced Document
GB/T 3512 Rubber, vulcanized or thermoplastic.Accelerated ageing and heat resistance tests.Air-oven method*, 2014-12-22 Update
GB/T 528 Rubber,vulcanized or thermoplastic.Determination of tensile stress-strain properties*, 2009-04-24 Update
GB/T 531 Rubber--Determination of indentation hardness by means of pocket hardness meters