Standards

GB/T 2317.1-2008 Active

GB/T 2317.1-2008 Test method for electric power fittings Part 1:Mechanical tests

This part specifies the mechanical test methods for electrical fittings.
This part is applicable to electrical fittings (hereinafter referred to as fittings) used in overhead power lines with a rated voltage of 10 kV and above, as well as in substations and power plant distribution devices.

Publish Date: 2008-09-24

GB/T 6846-2008 Active

GB/T 6846-2008 Photography—Determination of ISO safelight conditions

This standard specifies the method of determining the maximum exposure time that a given photosensitive material can accept from a given safety lamp without affecting the quality of the final image. It also stipulates the recording of the maintenance and operating environment of the safety lamp components.

Publish Date: 2008-09-24

GB/T 7598-2008 Active

GB/T 7598-2008 Determination of water-soluble acid in transformer oils in service

This standard specifies the method for determining the water-soluble acidity of transformer oil in operation. This method is applicable to transformer oil in operation. The determination of water-soluble acidity of other mineral oils can be carried out with reference to this method.

Publish Date: 2008-09-24

GB/T 7601-2008 Active

GB/T 7601-2008 Determination of water content for transformer and turbine oils in service by gas chromatographic method

This standard specifies the gas chromatography method for determining the water content in transformer oil, turbine oil, and sealing oil used in hydrogen-cooled generator sets. This standard is applicable to the determination of water content in transformer oil, turbine oil, and sealing oil used in hydrogen-cooled generator sets. The determination of water content in other oils can also be referenced to this standard.

Publish Date: 2008-09-24

GB/T 7602.1-2008 Active

GB/T 7602.1-2008 Determination of T501 oxidation inhibitor content in transformer oil or turbine oil—Part 1:spectrophotometric method

This section specifies the spectrophotometric method for determining the content of T501 (2,6-di-tert-butyl-p-cresol) antioxidant added to transformer oil and turbine oil.
This section is applicable to the determination of the content of T501 antioxidant in transformer oil and turbine oil.
The determination of the content of T501 antioxidant in other oils can also be referred to this section.

Publish Date: 2008-09-24

GB/T 9582-2008 Active

GB/T 9582-2008 Photography—Industrial radiographic films—Determination of ISO speed,ISO average gradient and ISO gradients G2 and G4 when exposed to X-and Gamma-radiation

This standard specifies the shape of the sensitivity curve, ISO sensitivity, ISO average slope, and the measurement methods of ISO slopes G2 and G4 for industrial radiographic films and film processing bodies exposed directly to X-rays and gamma rays. This standard does not specify the measurement methods for industrial radiographic films with fluorescent intensifying screens.

Publish Date: 2008-09-24

GB/T 9861-2008 Active

GB/T 9861-2008 Imaging materials—Photographic film and papers—Method for determining the resistance of photographic emulsions to wet abrasion

This standard specifies a laboratory test method for evaluating the scratch resistance of photographic emulsions or gelatin back layers during the processing and washing process. This method is suitable for determining changes in the performance of processing solutions, the characteristics of gelatin layers, processing solution temperature and processing time, and the combined effects of these factors on the wet scratch resistance of gelatin layers. This method is also suitable for determining the firmness of photographic emulsions in a wet state, but it is not suitable for evaluating the scratch resistance of support materials.

Publish Date: 2008-09-24

GB/T 9864-2008 Active

GB/T 9864-2008 Method for determination of silver in photographic films,papers,emulsions,fixing baths,effluents,sludges or residues

This standard specifies the methods for determining the amount of silver in silver sludge, residues, rinsing and processing solutions, and wastewater generated during the production and processing of various photographic products, including sampling, sample preservation, and analysis methods. The atomic absorption spectrometry (AAS) can be directly used for many types of samples. Digestion method A is suitable for low-salt wastewater and washing water, and digestion method B is suitable for film, photographic paper, sludge, resin, and concentrated processing wastewater.

Publish Date: 2008-09-24

GB/T 1568-2008 Active

GB/T 1568-2008 Technical specifications for keys

This standard specifies the technical requirements, acceptance inspection, marking, and packaging for various types of keys, except spline keys.

Publish Date: 2008-09-22

GB/T 3478.1-2008 Active

GB/T 3478.1-2008 Straight cylindrical involute splines—Metric module,side fit—Part 1:Generalities

This part of GB/T 3478 specifies the modulus series, basic tooth profile, tolerances, and tooth side fit categories of cylindrical straight-tooth involute splines.
This part is applicable to cylindrical straight-tooth involute splines with standard pressure angles of 30° and 37.5° (modulus from 0.5 mm to 10 mm) and 45° (modulus from 0.25 mm to 2.5 mm) and tooth side fits.

Publish Date: 2008-09-22

GB/T 3478.2-2008 Active

GB/T 3478.2-2008 Straight cylindrical involute splines—Metric module,side fit—Part 2:30°pressure angle dimensions tables

This part of GB/T 3478 specifies all the spline dimensions required for cylindrical straight-tooth involute splines with 30° standard pressure angle and round tooth roots (hereinafter referred to as 30° flat tooth roots and 30° round tooth roots). This part is applicable to involute splines with a pressure angle of 30°, a module of 0.5 mm to 10 mm, and a tooth side fit specified in GB/T 3478.1—2008. The dimension tables in this part are compiled according to the calculation formula in Table 3 of GB/T 3478.1—2008 and a tooth side fit of H/h, and using basic inspection methods.

Publish Date: 2008-09-22

GB/T 3478.3-2008 Active

GB/T 3478.3-2008 Straight cylindrical involute splines—Metric module,side fit—Part 3:37.5°pressure angle dimensions tables

This part of GB/T 3478 specifies all the spline dimensions required for cylindrical straight-tooth involute splines of the 37.5° standard pressure angle gear root (hereinafter referred to as 37.5° involute gear root). This part is applicable to involute splines with a pressure angle of 37.5°, a module of 0.5 mm to 10 mm, and a tooth side fit specified in GB/T 3478.1—2008. The dimension tables in this part are compiled according to the calculation formula in Table 3 of GB/T 3478.1—2008 and with a tooth side fit of H/h, using basic inspection methods.

Publish Date: 2008-09-22