GB/T 17391 Test method for thermal stability of polyethylene pipes and fittings
GB/T 18251 Method for the assessment of the degree of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds*， 2019-08-30 Update
GB/T 19466.2 Plastics-Differential scanning calorimetry(DSC)-Part 2:Determination of glass transition temperature
GB/T 19466.3 Plastics-Differential scanning calorimetry(DSC)-Part 3:Determination of temperature and enthalpy of melting and crystallization
GB/T 19466.4 Plastics—Differential scanning calorimetry （DSC）—Part 4: Determination of specific heat capacity*， 2016-10-13 Update
GB/T 19466.5 Plastics—Differential scanning calorimetry (DSC)—Part 5: Determination of characteristic reaction-curve temperatures and times, enthalpy of reaction and degree of conversion*， 2022-12-30 Update
GB/T 19466.6 Plastics.Differential scanning calorimetry(DSC).Part 6:Determination of oxidation induction time(isothermal OIT) and oxidation induction temperature (dynamic OIT)
GB/T 2410 Determination of light transmittance and haze of transparent plastics
GB/T 2918 Standard environment for conditioning and testing of plastic specimens*， 2019-11-01 Update
GB/T 3682 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics
GB/T 9345.1 Plastics.Determination of ash.Part1:General methods