Standards

CJ 274-2008 City gas pressure regulators

Publish Date: 2008-02-29

CJ/T 275-2008 City gas pressure regulating station

This standard specifies the terms and definitions, model numbering, structural requirements, technical requirements, test methods, inspection and acceptance, quality certificates, marking, packaging, transportation, and storage of gas pressure regulators used in urban gas transmission and distribution systems (hereinafter referred to as "pressure regulators").
This standard applies to pressure regulators with an import pressure not exceeding 1.6 MPa and an operating temperature not exceeding -20°C to 60°C.
This standard does not apply to underground pressure regulators.

Publish Date: 2008-02-29

CJ/T 50-2008 Pressure regulators for liquefied petroleum gas cylinders

This standard specifies the classification and model numbering, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of bottled liquefied petroleum gas regulators (hereinafter referred to as regulators). This standard applies to household bottled liquefied petroleum gas regulators (hereinafter referred to as household regulators) with an inlet pressure of 0.03 MPa to 1.56 MPa, an outlet pressure of 2.80 kPa ± 0.50 kPa, a rated flow rate of less than or equal to 2 m3/h, and an operating temperature of -20°C to 45°C; as well as non-household bottled liquefied petroleum gas regulators (hereinafter referred to as non-household regulators) with an inlet pressure of 0.03 MPa to 1.56 MPa, an outlet pressure of 2.80 kPa ± 0.50 kPa or 5.00 kPa ± 0.90 kPa, a rated flow rate of less than or equal to 3.6 m3/h, and an operating temperature of -20°C to 45°C. All pressure values mentioned in this standard refer to gauge pressure unless otherwise specified.

Publish Date: 2008-02-29

CJ/T 267-2007 Hybrid electric city bus

This standard specifies the terms and definitions, model compilation rules, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of hybrid electric city buses.
This standard applies to hybrid electric city buses with a length of more than 9 m and less than or equal to 18 m (hereinafter referred to as hybrid buses).

Publish Date: 2007-12-21

CJ/T 268-2007 City-bus fuel fired heater

This standard specifies the terms and definitions of fuel heaters for urban buses, the structure of the heaters, the rules for model designation, requirements, test methods, inspection rules, and marking, packaging, and storage.
This standard applies to urban buses. Other vehicles such as tourist buses, long-distance buses, trucks, or special vehicles may refer to it for implementation.

Publish Date: 2007-12-21

CJ/T 269-2007 Solenoid operated valve for city bus service door system

This standard specifies the terms and definitions, product models, requirements, tests, inspection rules, and marking, packaging, transportation, and storage of electric control directional valves used in passenger door systems of urban buses.
This standard applies to electric control directional valves in passenger door systems of urban buses that use compressed air as the medium. Electric control directional valves used in passenger door systems of long-distance buses and tourist buses can be referenced and adopted accordingly.

Publish Date: 2007-12-21

CJ 128-2007 Heat meters

This standard specifies the terms and definitions, technical characteristics, requirements, test methods, inspection rules, marking, packaging, and storage of heat meters.
This standard applies to heat meters used for flowing media such as water, with a temperature range of 2℃ to 150℃ and a pressure not exceeding 2.5MPa.

Publish Date: 2007-10-15

CJ/T 259-2007 Dimethyl ether for city gas

This standard specifies the requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of dimethyl ether used for urban gas in towns.
This standard applies to dimethyl ether used for urban gas in towns for residential, commercial, and industrial enterprises.

Publish Date: 2007-08-21

CJ/T 214-2007 Urban municipal supervision and management information system—Classification,coding and data requirements for urban managed components and events

This standard specifies the terms and definitions of management components and events in urban municipal comprehensive supervision information systems, the classification, codes, and graphic symbols of management components, the classification and codes of events, the data requirements for management components and events, and the coding rules for professional departments, etc.
This standard is applicable to the acquisition and management of component and event data in urban municipal comprehensive supervision within built-up areas of cities. Other urban management applications can refer to this standard for implementation.

Publish Date: 2007-04-29

CJ/T 242-2007 External automatic brake adjuster of city bus

This standard specifies the terms and definitions, requirements, test methods, inspection rules, and marking, packaging, transportation, and storage of external brake clearance automatic adjustment arms (hereinafter referred to as automatic adjustment arms) for urban buses.
This standard applies to all types of automatic adjustment arms for urban buses. Automatic adjustment arms for other vehicles can be implemented in accordance with this standard.

Publish Date: 2007-04-09

CJ 244-2007 CJ 244-2007 Swimming Pool Water Quality Standards

Publish Date: 2007-03-08

CJ 248-2007 The disposal of sludge from municipal wastewater treatment plant—The quality of sludge used for afforestation in gardens or forests

This standard specifies the technical requirements for the sludge quality indicators, sampling, and monitoring for the use of sludge from urban wastewater treatment plants in landscape gardening.
This standard applies to the disposal of sludge from urban wastewater treatment plants and the use of sludge in landscape gardening.

Publish Date: 2007-03-01