GB 35848-2024 Commercial gas-burning appliance
1 Scope
This document specifies the classification and models, requirements, test methods, inspection rules, marking, warning and instructions as well as packaging, transportation and storage of commercial gas-burning appliance (hereinafter referred to as “appliance”).
This document is applicable to appliances that use town gas conforming to GB/T 13611, with the combustion air taken from indoors and the combustion products directly or indirectly discharged to outdoors, including:
a) steam generator type appliance with nominal heat input of not greater than 80kW, steam pressure of not greater than 80kPa, and the design water capacity at normal water level of less than 30L;
b) steaming oven type appliance with nominal heat input of not greater than 80kW and steam pressure in steaming chamber of not greater than 1 200Pa;
c) fryer type appliance with nominal heat input of not greater than 50kW and pressure in chamber of not greater than 80kPa;
d) pasta cooker type appliance with nominal heat input of not greater than 50kW;
e) large cooker type appliance with nominal heat input of not greater than 80kW;
f) Flat head cooker type appliance with nominal heat input of not greater than 50kW;
g) atmospheric pressure boiler type appliance with nominal heat input of not greater than 100kW;
h) rice cooker type appliance with cooking volume of greater than or equal to 6L;
i) dishwasher type appliance with nominal heat input of not greater than 50kW;
j) cooking stove type appliance with nominal heat input of not greater than 60kW;
k) barbecue type appliance with nominal heat input of not greater than 50kW;
l) hot plate type appliance with nominal heat input of not greater than 35kW;
m) oven type appliance with nominal heat input of not greater than 80kW;
n) other commercial gas-burning appliances with nominal heat input of not greater than 100kW;
o) combination of the above products.
Note 1: The above heat input refers to the heat input of a single combustion unit.
Note 2: This document only deals with single-phase power supply with rated voltage not exceeding 250V.
Note 3: Any pressure not specified in this document refers to gauge pressure.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
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 liquid delivery
GB 4208 Degrees of protection provided by enclosure (IP code)
GB 4706.1 Household and similar electrical appliances - Safety - Part 1: General requirements
GB 4806.3 National food safety standard - Ceramic ware
GB 4806.9 National food safety standard - Food contact metal materials and articles
GB 4806.11 National food safety standard - Food contact rubber materials and articles
GB/T 5013.1 Rubber insulated cables of rated voltages up to and including 450/750 V - 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 tubes 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 Standard for safety evaluation of equipment and protective materials in drinking water system
GB/T 23658 Elastomeric seals - Material requirement for seals used in pipes and fittings carrying gaseous fuels and hydricarbon 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/T 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
For the purposes of this document, the terms and definitions given in GB/T 13611, GB/T 16411, GB/T 38603 and the following apply.
3.1
cold state
state where the burner of the appliance is cooled close to room temperature after the appliance has operated normally for a period
3.2
spark restoration
a function that automatically turns the ignition on again without completely cutting off the gas supply when ignition is unsuccessful or the flame is accidentally extinguished
3.3
recycling
automatic control function of cutting off the gas supply immediately and restarting automatically according to the starting program in case of unexpected flame failure of the appliance during operation
3.4
primary flue
a section of continuous flue on the appliance structure
Note: It may be directly connected with the flue of the external smoke exhaust system to exhaust smoke, and may also exhaust smoke through the centralized smoke exhaust system.
3.5
ignition burner
permanent ignition burner used to ignite the main burner
Note: Ignition burner which is maintained ignited when the main burner is ignited or extinguished, and also known as constant open flames.
3.6
condensation type gas appliance
appliance of which the water vapor in the smoke generated by gas combustion is partially condensed with the heat effectively utilized during condensation under the reference conditions
3.7
gas steaming oven
appliance that uses gas as fuel and uses micro-pressure saturated steam made by heating water for food steaming
Note 1: The product is mainly consisting of components such as combustion system, water supply system, water tank or steam generation system, smoke exhaust system, and steaming chamber.
Note 2: The product is divided into water tank gas steaming oven and steam generating gas steaming oven.
— water tank gas steaming oven refers to a oven with water tank. The water in the water tank is heated to boiling in an open manner and provides steam for the steaming chamber of the steaming oven, the steam is directly discharged into the atmosphere through the steaming chamber or vent pipe.
— Steam generating gas steaming oven means a steaming oven containing a steam generating unit in the form of a steam generator structure. The steam passage is not equipped with a pressure accumulator valve, which is different from the combination of steam generator and steam chamber with pressure function.
3.8
fryer
appliance for frying food using gas as fuel and oil as medium
Note: A fryer for frying food under pressure is called a pressure fryer.
3.9
indicated level
the highest (lowest) level indicated on the appliance
3.10
pasta cooker
appliance for cooking food using gas as fuel and water as medium
4 Classification and model
4.1 Classification
4.1.1 According to the types of gas used, the appliances may be classified into: artificial gas appliance (coded as R, rated pressure 1 000 Pa); natural gas appliance (coded as T, rated pressure 1 000 Pa or 2 000 Pa); liquefied petroleum gas appliance (coded as Y, rated pressure 2 800 Pa or 5 000 Pa).
4.1.2 According to the different smoke exhaust modes, the appliances are classified according to Table 1.
4.1.3 According to different combustion modes, the appliances may be classified into: full premixed appliance, atmospheric appliance and diffusion appliance.
4.1.4 According to whether the latent heat of water vapor in the smoke is utilized or not, the appliances are classified into condensation type gas appliance and non-condensation type gas appliance.
Contents
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and model
4.1 Classification
4.2 Model
5 Requirements
5.1 Material
5.2 General structure
5.3 Parts and components of gas system
5.4 Special structure of appliance
5.5 Performance
6 Test methods
6.1 Test conditions
6.2 Inspection and verification
6.3 Gas system tightness test
6.4 Heat input accuracy test
6.5 Combustion condition test
6.6 Test for flame failure device
6.7 Ignition performance test
6.8 Pressurizer performance test
6.9 Pre-cleaning test
6.10 Test for safety device of Type B appliance
6.11 Surface temperature rise test
6.12 Electrical tests
6.13 Auxiliary energy test
6.14 Test for reasonable energy utilization
6.15 Special requirements tests
7 Inspection rules
7.1 Delivery inspection
7.2 Type test
8 Marking, warning and instructions for use
8.1 Marking
8.2 Warning
8.3 Instructions for use
9 Packaging, transportation and storage
9.1 Packaging
9.2 Transportation
9.3 Storage
Annex A (Informative) List of clauses of this document that support the basic requirements of GB 6914-
Bibliography
