GB/T 4985-2021
Standard test method for needle penetration of petroleum waxes (English Version)

Standard No.

GB/T 4985-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

国家市场监督管理总局、中国国家标准化管理委员会

Latest

GB/T 4985-2021

Replace

GB/T 4985-2010

Scope

This document describes a method for evaluating the hardness of wax by measuring the depth of penetration of a standard needle into a wax specimen. This document is applicable to petroleum waxes with a penetration value not greater than 2501/10mm. It can also be used to determine Fischer-Tropsch wax, synthetic wax and biological wax, etc. However, this document does not give the precision of measuring synthetic wax and biological wax.

GB/T 4985-2021 Referenced Document

• GB/T 2539 Determination of melting point of petroleum wax by cooling curve method*， 2023-09-07 Update
• GB/T 514-2005 Specification for liquid-in-glass thermometers for testing of petroleum products
• SH/T 0132 Determination of Freezing Point of Petroleum Wax

GB/T 4985-2021 history

• 2021 GB/T 4985-2021 Standard test method for needle penetration of petroleum waxes
• 2010 GB/T 4985-2010 Standard test method for needle penetration of petroleum waxes
• 1998 GB/T 4985-1998 Determination of needle penetration of petroleum waxes