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GB/T 27885-2011 Determination of hydrogen, nitrogen, carbon monoxide carbon dioxide and C1~C8 hydrocarbons in the coal-based F-T synthetic tail gas - Gas chromatographic method $210.00 via email in 1~3 business day valid
GB/T 28397-2012 Evaluation indexes and computation of circular economy for coal mining area $160.00 via email in 1~3 business day valid
GB/T 29119-2012 Technical specification of coalbed methane resource exploration $480.00 via email in 1~3 business day superseded
GB/T 29119-2023 Technical specification of coalbed methane resource prospecting $435.00 via email in 1~5 business day valid
GB/T 29161-2012 Specifications of on-line analyzer for coal based on neutron activation analysis $270.00 via email in 1~3 business day valid
GB/T 29163-2012 Technical guidance for the utilization of gangue $80.00 via email in 1~3 business day valid
GB/T 29164-2012 Guide for utilization of certified reference materials for composition analysis and physical property measurements of coal $210.00 via email in 1~3 business day valid
GB/T 29721-2013 Specifications of coal for fluidized bed gasifier $80.00 via email in 1~3 business day superseded
GB/T 29721-2023 Commercial coal quality—Coal for fluidized bed gasification $160.00 via email in 1~3 business day valid
GB/T 29722-2013 Specifications of coal for entrained-flow gasifier $80.00 via email in 1~3 business day superseded
GB/T 29722-2021 Commercial coal quality—Coal for entrained-flow gasification $165.00 via email in 1~3 business day valid
GB/T 29723.1-2013 Grade and limit of major process energy consumption for coal mine—Part 1:primary fan system $100.00 via email in 1~3 business day valid
GB/T 29747-2013 Coal direct liquefaction—Determination of composition for coal direct liquefaction gas—Gas chromatographic method $180.00 via email in 1~3 business day valid
GB/T 29748-2013 Coal direct liquefaction—Determination of ash in coal liquefaction residue $100.00 via email in 1~3 business day valid
GB/T 30043-2013 Coal direct liquefaction―Determination of softening point of liquefaction residue―Ring and ball apparatus $140.00 via email in 1~3 business day valid
GB/T 30044-2013 Coal direct liquefaction―Determination of constituents of heavy products―Solvent extract $160.00 via email in 1~3 business day valid
GB/T 30045-2013 Coal direct liquefaction—Determination of apparent viscosity of coal-oil-slurry $100.00 via email in 1~3 business day valid
GB/T 30046.1-2013 Froth flotation testing―Part 1:Laboratory procedure $220.00 via email in 1~3 business day valid
GB/T 30046.2-2013 Froth flotation testing―Part 2:Sequential evaluation $220.00 via email in 1~3 business day valid
GB/T 30046.3-2013 Froth flotation testing―Part 3:Release evaluation $160.00 via email in 1~3 business day valid
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