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GB 35848-2024Commercial gas-burning appliances (English PDF)

商用燃气燃烧器具

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Issued by

State Administration for Market Regulation; Standardization Administration of China

Level / Type

National · Mandatory

Issue date

April 29, 2024

Implementation date

August 1, 2024

Scope

GB 35848-2024 is the English-translated version of 商用燃气燃烧器具.

GB 35848-2024 is the Chinese national standard for commercial gas-burning appliances that use city gas conforming to GB/T 13611, take combustion air from indoors and discharge the products of combustion outdoors.

It gives the classification and models and the requirements on materials, general structure, gas system components, special structures and performance, with the matching test methods: gas system sealing, heat load accuracy, combustion condition, flameout protection, ignition, pre-purge, surface temperature rise, electrical performance and rational energy utilisation.

It also fixes the inspection rules, the markings, warnings and instruction manual, and packaging, transport and storage. The appliances covered, each with its own heat load limit, run from steam generators, steaming ovens and fryers to cooking stoves, open burners, water boilers, grills and ovens.

It replaces GB 35848-2018, was issued on 29 April 2024 and has applied since 1 August 2024.

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Document preview — GB 35848-2024

National Standard of the People's Republic of China

ICS
91.140
Classification
P45
Replacing
GB 35848-2018

Issued by: State Administration for Market Regulation; Standardization Administration of China

Contents

  • Foreword3
  • 1 Scope6
  • 2 Normative references7
  • 3 Terms and definitions8
  • 4 Classification and models13
  • 4.1 Classification13
  • 4.2 Model14
  • 5 Requirements15
  • 5.1 Materials15
  • 5.2 General structure16
  • 5.3 Gas system components19
  • 5.4 Special structures of gas appliances23
  • 5.5 Performance30
  • 6 Test methods43
  • 6.1 Test conditions43
  • 6.2 Inspection and verification46
  • 6.3 Gas system sealing test46
  • 6.4 Heat load accuracy test47
  • 6.5 Combustion condition test47
  • 6.6 Flameout protection device test52
  • 6.7 Ignition performance test53
  • 6.8 Pressure stabilizer performance test53
  • 6.9 Pre-purge test53
  • 6.10 Type B appliance safety device test54
  • 6.11 Surface temperature rise test55
  • 6.12 Electrical performance test56
  • 6.13 Auxiliary energy test57
  • 6.14 Rational energy utilization test58
  • 6.15 Tests for special requirements69
  • 7 Inspection rules77
  • 7.1 Exit-factory inspection77
  • 7.2 Type test78
  • 8 Markings, warnings, instructions manual79
  • 8.1 Markings79
  • 8.2 Warnings79
  • 8.3 Instruction manual80
  • 9 Packaging, transportation, storage82
  • 9.1 Packaging82
  • 9.2 Transportation82
  • 9.3 Storage82
  • Appendix A (Informative) Correspondence table of clauses in this document that support the basic requirements of GB 16914-202383
  • References85

1 Scope

This document specifies the classification and models, requirements, test methods, inspection rules, markings, warnings and instructions for use, packaging, transportation and storage of commercial gas-burning appliances (hereinafter referred to as "appliances").

This document applies to gas appliances that use urban gas as their energy source, conforming to GB/T 13611, with combustion air drawn from indoors and combustion products discharged directly or indirectly outdoors, including:

a) Steam generator appliance which has a rated heat load not exceeding 80 kW, steam pressure not exceeding 80 kPa, a designed normal water volume less than 30 L;

b) Gas steaming oven appliance which has a rated heat load not exceeding 80 kW and steam chamber pressure not exceeding 1200 Pa;

c) Fryer appliance which has a rated heat load not exceeding 50 kW and internal chamber pressure not exceeding 80 kPa;

d) Cooking stove appliance which has a rated heat load not exceeding 50 kW;

e) Large pot stove appliance which has a rated heat load not exceeding 80 kW;

f) Open burner appliance which has a rated heat load not exceeding 50 kW;

g) Atmospheric pressure water boiler appliance which has a rated heat load not exceeding 100 kW;

h) Rice gas cookers which have a cooking capacity of 6 L or more;

i) Dishwashers which have a rated heat load of 50 kW or less;

j) Stir-fry stoves which have a rated heat load of 60 kW or less;

k) Grills which have a rated heat load of 50 kW or less;

l) Hot plate stoves which have a rated heat load of 35 kW or less;

m) Ovens which have a rated heat load of 80 kW or less;

n) Other commercial gas appliances which have a rated heat load of 100 kW or less;

o) Combinations of the above products.

Note 1: The heat loads mentioned above refer to the heat load of a single combustion unit.

Note 2: This document only covers single-phase power supplies with a rated voltage not exceeding 250 V.

Note 3: Unless otherwise specified, all pressures in this document refer to gauge pressure.

2 Normative references

The contents of the following documents, through normative references herein, constitute essential provisions of this document. For dated references, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies to this document.

GB/T 191 Packaging - Pictorial marking for handling of goods

GB/T 1527 Drawn tube of copper and copper alloys

GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB/T 3091 Welded steel pipes for low pressure fluid delivery

GB/T 4208 Degrees of protection provide by enclosure (IP code)

GB 4706.1 Household and similar electrical appliances - Safety Part 1: General requirements

GB 4806.3 National food safety standard - Enamel products

GB 4806.9 National food safety standard - Metallic materials and articles for food contact

GB 4806.11 National food safety standard - Food contact rubber materials and products

GB/T 5013.1 Rubber insulated cables of rated voltages up to and including 450/750V - Part 1: General requirements

GB/T 7306 (All Parts) Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads

GB/T 7307 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads

GB/T 8163 Seamless steel pipes for liquid service

GB/T 8464 Cast iron, copper and stainless steel valves with screwed connections

GB 8624 Classification for burning behavior of building materials and products

GB/T 12113 Methods of measurement of touch current and protective conductor current

GB/T 12771 Welded stainless steel pipes for fluid transport

GB/T 13611 Classification and basic characteristics of city gas

GB/T 16411 Universal test methods of gas burning appliances for domestic use

GB/T 17219 Hygienic safety evaluation of distribution equipment, protective materials and treatment materials in drinking water system

GB/T 23658 Elastomeric seals - Material requirement for seals used in pipes and fittings carrying gaseous fuels and hydrocarbon fluid

GB/T 37499 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Automatic and semi-automatic valves

GB/T 38595 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Mechanical thermostats

GB/T 38603 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Electronic controller

GB/T 38693 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Thermoelectric flame supervision controls

GB/T 38756 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Ignition unit

GB/T 39485 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Manual gas valves

GB/T 39488 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Electronic type gas and air ratio control system

GB/T 39493 Safety and control devices for gas burners and gas-burning appliances - Particular requirements - Pressure regulators

GB 41317 Stainless steel corrugated tubes for the connection of gas appliances

CJ/T 450 Pneumatic gas/air ratio adjustment devices for gas-burning appliances

3 Terms and definitions

The terms and definitions defined in GB/T 13611, GB/T 16411, GB/T 38603, as well […]

4 Classification and models

4.1 Classification

4.1.1 According to the type of gas used, appliances are classified into artificial gas appliances (code R, rated pressure 1000 Pa), natural gas appliances (code T, rated pressure 1000 Pa or 2000 Pa), liquefied petroleum gas appliances (code Y, rated pressure 2800 Pa or 5000 Pa).

4.1.2 According to the exhaust method, appliance classification is shown in Table 1.

4.1.3 According to the combustion method, appliances are classified into fully premixed appliances, atmospheric appliances, diffusion appliances.

4.1.4 Based on whether the latent heat of vaporization of water vapor in the flue gas is effectively utilized, gas appliances are classified into condensation type appliances and non-condensation type appliances.

4.1.5 Classification by function is shown in Table 2.

5 Requirements

5.1 Materials

5.1.1 General requirements

5.1.1.1 The materials used to manufacture the appliances shall be able to withstand the temperature and load under normal operating conditions.

5.1.1.2 The sealing materials in contact with the gas shall be compatible with the characteristics of the gas used.

5.1.1.3 Gas appliances shall not use materials containing asbestos.

5.1.1.4 The solder used in gas appliances shall not contain hexavalent chromium.

5.1.1.5 All components in contact with condensate, such as heat exchangers, flue pipes, seals, shall be made of corrosion-resistant materials or undergo surface anti-corrosion treatment.

5.1.2 Metallic materials

5.1.2.1 The metallic materials for gas pipelines shall conform to the specifications of GB/T 1527, GB/T 3091, GB/T 8163, or GB/T 12771.

5.1.2.2 Water pipelines for gas appliances shall be made of corrosion-resistant materials and materials that do not pollute the water.

5.1.2.3 Metal components that may be affected by corrosion (except for corrosion-resistant materials) shall undergo electroplating, painting, or other suitable surface anti-corrosion treatment.

5.1.2.4 Metal materials in contact with steam or food shall conform to the requirements of GB 4806.9.

5.1.2.5 The melting point of welding materials for gas pipelines shall not be lower than 450 °C.

5.1.3 Non-metallic materials

5.1.3.1 Sealing materials in contact with food shall conform to the requirements of GB 4806.11.

5.1.3.2 Enamel materials that may come into contact with food shall conform to the requirements of GB 4806.3.

5.1.3.3 Elastic sealing materials for gas pipelines shall conform to the requirements of […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 86 pages — is available in the English PDF.

Referenced standards

Normative references

GB 4706.1 · GB 4806.3 · GB/T 5013.1 · GB/T 7306 · CJ/T 450

Similar standards

Editions of GB 35848

EditionTitleRevisionStatus
GB 35848-2024Commercial gas-burning appliancesfirst revisionCurrent
GB 35848-2018Commercial gas-burning appliancesfirst issueSuperseded

This page sells the current edition, GB 35848-2024. Earlier editions are listed for reference only.

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