Browse Standards
Found: 212212 — page 4397 of 4422
Withdrawn
GB/T 2531-1981 — Copper sheets for fixing boards in heat exchangers
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Superseded
GB/T 2532-1981 — Brass sheets and strips for main sheet in water tanks and water chambers
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Superseded
GB/T 2539-1981 — Paraffins--Determination of melting point (cooling curve)
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Withdrawn
GB/T 2540-1981 — Petroleum products--Determination of density by pycnometer
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Valid
GB/T 2541-1981 — Petroleum products--Computation table for viscosity indices
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$12,650.00708 pages
Superseded
GB/T 2547-1981 — Plastic resins--Sampling
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$255.00PDF
Withdrawn
GB/T 2555-1981 — Pipe flange connectors for ordinary use--Mounting dimensions
National·Recommended
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Withdrawn
GB/T 2556-1981 — Pipe flanges for ordinary use--Sealing surfaces--Forms and dimensions
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Superseded
GB/T 2559-1981 — Lignite wax--Determination of melting point
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$440.00PDF
Withdrawn
GB/T 2560-1981 — Lignite wax--Determination of drop point
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Withdrawn
GB/T 2561-1981 — Lignite wax--Determination of propanone-soluble substance (resin matter)
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GB/T 2562-1981 — Lignite wax--Determination of benzene insoluble substance
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GB/T 2563-1981 — Lignite wax--Determination of ash content
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Withdrawn
GB/T 2564-1981 — Lignite wax--Determination of acid value and saponification value
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Superseded
GB/T 2572-1981 — Glass fiber reinforced plastics-Average linear expansion factor of fiber-Method of testing
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$90.00PDF
Superseded
GB/T 2587-1981 — Energy equilibrium of heating devices--Common rules
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$85.00PDF
Superseded
GB/T 2588-1981 — Equipments--Method of calculating heat efficiency--Common rules
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Superseded
GB/T 2589-1981 — General principles for calculation of total production energy consumption
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Withdrawn
GB/T 2590.1-1981 — Zirconium and hafnium oxides--Determination of zirconium (hafnium)oxide contents--Mandelic acid gravimetric method
National·Recommended
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Withdrawn
GB/T 2590.10-1981 — Hafnium oxides--Determination of manganese oxide content--Potassium periodate photometric method
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GB/T 2590.11-1981 — Zirconium oxide--Determination of nickel content--2, 2-furil dioxime absorption photometric method
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GB/T 2590.2-1981 — Zirconium and hafnium oxides--Determination of iron content--Sulfosalicylic acid photometric method
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Withdrawn
GB/T 2590.3-1981 — Zirconium and hafnium oxides--Determination of silicon content--Silicon-molybdenum blue photometric method
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Withdrawn
GB/T 2590.4-1981 — Zirconium and hafnium oxides--Determination of aluminum content--Chromazurol S-tetradecyl pyridine bromide photometric method
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Withdrawn
GB/T 2590.5-1981 — Zirconium and hafnium oxides--Determination of sodium content--Flame atomic absorption spectrophotometric method
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GB/T 2590.6-1981 — Zirconium and hafnium oxides--Determination of titanium content--Diantipyrymethane photometric method
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Withdrawn
GB/T 2590.7-1981 — Zirconium and hafnium oxides--Determination of phosphorus content--Ascorbic acid reduced molybdoantimonylphosphoric acid absorption photometric method
National·Recommended
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Withdrawn
GB/T 2590.8-1981 — Zirconium oxide--Determination of hafnium oxide content--Emission spectrophotometric method
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Withdrawn
GB/T 2590.9-1981 — Hafnium oxide--Determination of zirconium oxide content--X-ray fluorescence spectrometric method
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GB/T 2592.1-1981 — Thallium--Determination of copper content--Neocuproine-chloroform extraction photometric method
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GB/T 2592.10-1981 — Thallium--Determination of thallium content--EDTA volumetric method
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GB/T 2592.2-1981 — Thallium--Determination of iron content--1, 10-phenanthroline photometric method
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GB/T 2592.3-1981 — Thallium--Determination of mercury content--Dithizone-carbon tetrachloride extraction photometric method
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GB/T 2592.4-1981 — Thallium--Determination of zinc content--Dithizone extraction photometric method
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GB/T 2592.5-1981 — Thallium--Determination of cadmium content--Dithizone extraction photometric method
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GB/T 2592.6-1981 — Thallium--Determination of lead content--Dithizone extraction photometric method
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GB/T 2592.7-1981 — Thallium--Determination of aluminum content--Chromazurol S photometric method
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Withdrawn
GB/T 2592.8-1981 — Thallium--Determination of indium content--Crystal violet extraction photometric method
National·Recommended
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Withdrawn
GB/T 2592.9-1981 — Thallium--Determination of silicon content--Isoamyl alcohol extraction molybdenum blue absorption photometric method
National·Recommended
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Withdrawn
GB/T 2596-1981 — Tungsten powder and tungsten carbide powder--Determination of specific surface product (average graininess)--Simplified nitrogen absorption method
National·Recommended
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Superseded
GB/T 2599-1981 — Mixed cresol (3-constituent)
National·Recommended
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$169.00PDF
Superseded
GB/T 2600-1981 — Dimethyl phenol for industrial use
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$85.00PDF
Superseded
GB/T 2601-1981 — Products from phenols--Determination of composition--Gas chromatography
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$135.00PDF
Superseded
GB/T 2602-1981 — Products from phenols--Determination of intermediate cresol content by the urea method
National·Recommended
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$70.00PDF
Withdrawn
GB/T 2604-1981 — o-Cresol--Determination of composition--Gas chromatography
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Valid
GB/T 2625-1981 — Process detection and controlflow chart--Symbols and letter codes
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$125.0015 pages
Withdrawn
GB/T 2656-1981 — Weld beads metal and welds--Fatigue tests
National·Recommended
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Superseded
GB/T 2662-1981 — Cotton clothes for both sexes
National·Recommended
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$55.00PDF