Standards

GB/T 30844.1-2024 Active

GB/T 30844.1-2024 Variable-frequency drive of 1 kV and below—Part 1:Technical conditions

This document specifies the rated values, usage conditions, technical requirements, test item requirements, and marking, packaging, transportation, and storage of general-purpose frequency conversion speed control equipment (hereinafter referred to as "speed control equipment") with a rated voltage of 1 kV or lower. This document applies to the design, production, and installation of speed control equipment with a rated input voltage of AC 1 kV and DC 1.5 kV or lower, a rated input frequency of 50 Hz or 60 Hz, an output voltage not exceeding 1 kV, and an output frequency less than 600 Hz. Note: Speed control equipment with an AC rated input voltage of 1,140 V or an output frequency greater than 600 Hz is also typically subject to this document. The relevant performance and other requirements shall be determined through consultation between the manufacturer and the user.

Publish Date: 2024-12-31

GB/T 21478-2024 Active

GB/T 21478-2024 Ships and marine technology—Marine environment protection—Vocabulary relating to oil spill response

This document defines the terms and definitions of oil spills and their control. It defines the standard terms related to oil spill treatment in large-scale oil spill cleanup activities, including monitoring and evaluation, containment, recovery, the use of dispersants, on-site burning, shoreline cleanup, and disposal.
This document is applicable to design, scientific research, production, and inspection related to the treatment of marine oil spills from ships.

Publish Date: 2024-12-31

GB/T 18892-2024 Active

GB/T 18892-2024 Environmental protect requirements of copying machines—Energy saving requirements for copiers and multi-function devices

This document specifies the typical energy consumption technical requirements for copiers and multifunctional all-in-one printers, and describes the corresponding test methods.
This document is applicable to the design and manufacture of copiers and multifunctional all-in-one printers with a copying format of A3 and below.

Publish Date: 2024-12-31

GB/Z 45113-2024 Active

GB/Z 45113-2024 Nanotechnologies—Test of volatile components in single-wall carbon nanotube samples—Evolved gas analysis/gas chromatograph-mass spectrometry

This document describes a method for characterizing the outgassing gases in single-walled carbon nanotube samples using outgassing gas analysis/gas chromatography-mass spectrometry.
Note: Due to the effects of heating and the possible presence of catalysts, the qualitative and quantitative results of the emitted gases may differ from the gases contained in the samples.

Publish Date: 2024-12-31

GB/T 45179-2024 Active

GB/T 45179-2024 Man-made fibre—Determination of friction factors of staple fibres—Capstan method

This document describes the method of determining the friction coefficient of short fibers using the winch method.
This document is applicable to short fibers of chemical fibers with a cut length of ≥30 mm.

Publish Date: 2024-12-31

GB/T 45164-2024 Active

GB/T 45164-2024 Classification and designation of defects in investment castings

This document provides the coding rules, coding structure, defect classification, defect names, and defect characteristic descriptions for casting defects in investment casting.
This document is applicable to the classification and naming of common defects in castings produced using the investment casting process.

Publish Date: 2024-12-31

GB/T 45162.1-2024 Active

GB/T 45162.1-2024 Warehouse logistics equipment—Specification for reliability test—Part 1:conveying and sorting equipment

This document defines the relevant terms of reliability for conveying and sorting equipment in logistics warehousing, establishes the general principles of reliability testing, specifies the testing conditions, provides the testing methods, testing items, testing records, and testing reports, and describes the sampling and testing methods.
This document is applicable to the reliability testing of conveying and sorting equipment such as conveyors, elevators, and sorting machines.

Publish Date: 2024-12-31

GB/T 45157-2024 Active

GB/T 45157-2024 Security and resilience—Community resilience—Guidelines for information exchange between organizations

This document provides guidance on inter-organizational information exchange, defining the principles, framework, and processes of information exchange, enabling participating organizations to learn from others' experiences, mistakes, or successes, and providing relevant measures to strengthen organizations' ability to respond to risks.
This document is applicable to both private and public organizations that need guidance on establishing the conditions to support information exchange.
This document is not applicable to specific technical aspects, and its focus is primarily on methodology.
Note: Legal regulations vary across different jurisdictions. Users of this document are responsible for determining the applicability of relevant legal regulations to this document on their own.

Publish Date: 2024-12-31

GB/T 45151-2024 Active

GB/T 45151-2024 Guidelines for construction of urban distribution network

This document provides guidelines for the construction of urban distribution networks, urban distribution nodes, and urban distribution channels.
This document is applicable to the construction, transformation, and optimization of distribution network nodes and distribution channels within the urban central districts and suburban areas of cities.

Publish Date: 2024-12-31

GB/T 45124-2024 Active

GB/T 45124-2024 Measurement of liquid flow in closed conduits—Volumetric method

This document describes a method (hereinafter referred to as the "volume method") for measuring the volume of liquid flowing into a work volume meter within a unit time to determine the liquid flow rate in a closed pipeline, including the principle, device, implementation steps, calculation of flow rate, and evaluation of measurement-related uncertainties.
The method described in this document is suitable for liquids that meet the following conditions:
a) The measurement medium is a low-vapor-pressure liquid (to ensure that any liquid evaporating from the work volume meter will not affect the required measurement accuracy);
b) Low viscosity (which will not alter or excessively delay the measurement of the liquid level in the work volume meter);
c) Non-toxic and non-corrosive characteristics.

Publish Date: 2024-12-31

GB/T 45120-2024 Active

GB/T 45120-2024 Road vehicles—Supply voltage of 48 V—Electrical requirements and tests

This document specifies the electrical requirements and test methods for electrical and electronic components in road vehicles with a nominal voltage of 48 V DC.
This document applies to the electrical performance of components with a 48 V DC supply voltage. For energy storage systems, the electrochemical components are not tested, and only their management systems are tested as independent DUTs.
This document includes general requirements for 48 V DC electrical systems, voltage ranges, voltage changes, and fluctuations, but does not include electromagnetic compatibility (EMC).

Publish Date: 2024-12-31

GB/T 45114-2024 Active

GB/T 45114-2024 Nanotechnologies—Measurements of particle size and shape distributions by transmission electron microscopy

This document specifies the method for collecting, measuring, and analyzing transmission electron microscope (TEM) images to obtain the size and shape distribution of nanoparticles.
This document is applicable to nanomaterials and particles larger than 100 nm, with the specific scope of application depending on the required uncertainty and the performance of the transmission electron microscope.

Publish Date: 2024-12-31