This standard specifies the method for evaluating the hardness of petroleum wax by measuring the penetration depth of a standard needle. This standard applies to petroleum waxes with a penetration value not greater than 250. This standard uses SI units. This standard deals with certain hazardous materials, operations and equipment, but is not intended to make recommendations on all safety issues related thereto. Therefore, users should establish appropriate safety and protective measures and determine the applicable management system before using this standard.
GB/T 4985-2010 Referenced Document
GB/T 2539 Determination of melting point of petroleum wax by cooling curve method*, 2023-09-07 Update
GB/T 514 Specification for liquid-in-glass thermometers for testing of petroleum products
SH/T 0132 Determination of Freezing Point of Petroleum Wax
GB/T 4985-2010 history
2021GB/T 4985-2021 Standard test method for needle penetration of petroleum waxes
2010GB/T 4985-2010 Standard test method for needle penetration of petroleum waxes
1998GB/T 4985-1998 Determination of needle penetration of petroleum waxes