Standards

GB/T 29820.2-2024 Active

GB/T 29820.2-2024 Assessment of uncertainty in the calibration and use of flow measurement devices—Part 2:Non-linear calibration relationships

This document describes the process of using the least squares criterion to fit a set of non-linear calibration data with quadratic, cubic, or higher-order polynomials, and evaluating the uncertainty associated with the generated calibration curves. Only polynomials with integer powers are considered.
Since conducting this type of curve fitting and uncertainty evaluation typically requires the use of a computer, in most cases, standard programs provided on the computer are used; a reference program is provided in Appendix A.
Examples of the use of these methods can be found in Appendix B.
It is not allowed to extrapolate beyond the data range.

Publish Date: 2024-12-31

GB/T 27930.2-2024 Active

GB/T 27930.2-2024 Digital communication protocols between off-board conductive charger and electric vehicle—Part 2:Communication protocols for GB/T 20234.3

This document specifies the communication protocols based on the controller area network at the physical layer, data link layer, transport layer, and application layer between the DC charging communication controller of electric vehicles used in GB/T 20234.3 DC charging interfaces and the charging communication controller of non-vehicle conductive chargers.
This document is applicable to digital communication between electric vehicles (referred to as "vehicles") and non-vehicle conductive chargers (referred to as "chargers") whose DC control guidance circuits and control principles comply with GB/T 18487.5.

Publish Date: 2024-12-31

GB/T 26189.2-2024 Active

GB/T 26189.2-2024 Lighting of work places—Part 2:Lighting requirements for safety and security of outdoor work places

This document specifies the basic lighting requirements and inspection procedures to meet the visual safety needs of personnel in outdoor workplaces.
This document is applicable to the lighting design of newly built, renovated, and expanded outdoor workplaces.

Publish Date: 2024-12-31

GB/T 25320.4-2024 Active

GB/T 25320.4-2024 Power systems management and associated information exchange—Data and communications security—Part 4:Profiles including MMS and derivatives

1.1 Overview
This document extends the scope of GB/Z 25320.4—2010 [1], specifies a compatibility mode—which provides interoperability with implementations based on GB/Z 25320.4—2010—and defines an extended functionality called the native mode.
1) The number in brackets refers to the reference.
This document clarifies the security requirements of the transport layer and the application layer. GB/Z 25320.4—2010 primarily provides limited support for authentication during the handshake of MMS-based applications at the application layer. This document also provides support for extended integrity and authentication during the handshake phase and data transmission phase, manages shared keys and encrypts data transmission at the application layer, and provides end-to-end security (E2E) with zero or multiple intermediate entities. GB/Z 25320.4—2010 only supports MMS-based systems, i.e., systems using the Open Systems Interconnection (OSI) protocol stack. This document also supports application protocols using other protocol stacks, such as the Internet Protocol Suite (see 4.1). This support extends to protecting application protocols encoded in XML. This extended security at the application layer is called E2E security.

Publish Date: 2024-12-31

GB/T 24589.1-2024 Active

GB/T 24589.1-2024 Financial information technology—Data interface of accounting software—Part 1:Enterprise

This document specifies the data interface requirements for accounting software, including the accounting data elements, and the content and format requirements of the data interface output files.
This document is applicable to the design, development, management, purchase, and application of accounting software used by enterprises. Other departments may refer to it when formulating requirements for enterprise accounting and related enterprise business (ERP) data sharing.

Publish Date: 2024-12-31

GB/T 21551.3-2024 Pending

GB/T 21551.3-2024 Antimicrobial and cleaning function of household and similar electrical appliances—Part 3:Particular requirements for air cleaner

This document specifies the hygiene safety and functional requirements for air purifiers used in households and similar applications with antibacterial, disinfectant, and purification functions, as well as labeling requirements, and describes the corresponding test methods.
This document applies to the research, development, production, and inspection of air purifiers used in households and similar applications that have one or more of the following functions: antibacterial, anti-mold, anti-allergen, anti-viral, disinfectant, anti-allergen, anti-viral, or odor removal (hereinafter referred to as "purifiers").
Note: For products with the above-mentioned functions that are not the main functions of the product, such as dehumidifiers, fans, humidifiers, etc., the evaluation of their compliance with the above-mentioned functions can refer to the relevant content of this document.

Publish Date: 2024-12-31

GB/T 20991-2024 Active

GB/T 20991-2024 Foot protection—Test methods for footwear

This document describes the testing methods for shoes in foot protection gear.
This document is applicable to safety shoes, chemical-resistant shoes, and other shoe (boot) products used for personal protection.

Publish Date: 2024-12-31

GB/T 20042.7-2024 Active

GB/T 20042.7-2024 Proton exchange membrane fuel cells—Part 7:Test method of carbon paper properties

This document defines the terms and definitions of carbon paper for proton exchange membrane fuel cells, and describes the testing methods for the characteristics of carbon paper for proton exchange membrane fuel cells, including thickness uniformity testing, resistance testing, mechanical strength testing, air permeability testing, porosity testing, bulk density testing, surface density testing, roughness testing, vertical thermal conductivity coefficient testing, bending stiffness testing, static contact angle testing, durability testing, and test reporting.
This document is applicable to the testing of carbon paper for proton exchange membrane fuel cells.

Publish Date: 2024-12-31

GB/T 18487.5-2024 Active

GB/T 18487.5-2024 Electric vehicle conductive charging system—Part 5:DC charging system for GB/T 20234.3

This document specifies the general requirements for direct current charging systems of electric vehicles used in GB/T 20234.3 direct current charging interfaces, including control guidance circuits, charging control processes, charging connection control sequences, as well as other requirements such as insulation monitoring devices, additional protective measures, and power failure protection. This document applies to direct current charging systems composed of electric vehicles (referred to as "vehicles") and non-vehicle-mounted conductive chargers (referred to as "non-vehicle chargers" or simply "chargers") that comply with the digital communication protocol specified in GB/T 27930.2. This document applies to non-vehicle-mounted conductive chargers with an isolated system, where the rated voltage on the power supply side does not exceed AC 1,000 V or DC 1,500 V, and the maximum operating voltage on the vehicle side does not exceed DC 1,500 V. Note 1: For non-restricted areas, the recommended direct current operating voltage range at the vehicle interface of non-vehicle-mounted conductive chargers is 200 V to 1,000 V. This document applies to direct current charging systems with a vehicle power supply circuit rated at Class B voltage. For direct current charging systems with a vehicle power supply circuit rated at Class A voltage, the provisions of this document shall be applied with reference. Note 2: For definitions of voltage levels, please refer to GB 18384. Note 3: When the direct current charging systems specified in this document are used in other fields such as electric industrial vehicles and electric construction machinery, additional requirements may be necessary, such as reassessing the short-circuit protection, Y capacitors, insulation resistance, and insulation monitoring devices of the charging system.

Publish Date: 2024-12-31

GB/T 45203-2024 Active

GB/T 45203-2024 Recycled black mass for lithium ion battery

This document specifies the classification and grading, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, and accompanying documents for recycled battery black powder used in lithium-ion batteries.
This document applies to battery black powder obtained from the recycling of lithium-ion battery waste and used for subsequent recycling applications.

Publish Date: 2024-12-31

GB/T 45198-2024 Active

GB/T 45198-2024 General requirements for valuation and evaluation of used vehicles

This document defines the terms and definitions of valuation and appraisal of old cars, establishes the principles of valuation and appraisal, stipulates general requirements, and describes valuation and appraisal methods.
This document is applicable to the valuation and appraisal of old cars. The valuation and appraisal of other motor vehicles can be used for reference.

Publish Date: 2024-12-31

GB/T 45174-2024 Active

GB/T 45174-2024 Footwear—Test method of density for microcellular soles

This document describes the method for testing the apparent density of a whole micro-porous sole.
This document is applicable to the determination of the apparent density of micro-porous materials and whole soles that are combined with other materials.

Publish Date: 2024-12-31