GB 50041-2020 Boiler Room Design Standard

General Provisions

• 第 1.0.3 条Boiler room design shall follow the principles of safety and reliability, advanced technology, economic ratio…
• 第 1.0.4 条The boiler room design should meet the functional requirements of the hotel building, including heating, dome…
• 第 1.0.5 条The boiler room design shall adopt effective measures to reduce the impact of waste gas, wastewater, waste re…
• 第 1.0.6 条The boiler room design should select high efficiency, energy saving, and low emission boilers and auxiliary e…
• 第 1.0.7 条The boiler room design shall meet fire protection, safety and labor protection requirements, with necessary s…
• 第 1.0.8 条The boiler room design should be coordinated with the overall site layout of the hotel building, with the boi…

Terminology

• 第 2.0.1 条Boiler room: A building or structure used for the installation of boilers and their auxiliary equipment, incl…
• 第 2.0.2 条Boiler room: the room where the boiler unit is installed.
• 第 2.0.3 条Auxiliary room: a room for installing auxiliary equipment such as water pumps, water treatment, fans, and con…
• 第 2.0.4 条Staff room: rooms such as changing rooms, rest areas, and toilets for operators.
• 第 2.0.5 条Oil fired boiler room: a boiler room that uses oil as fuel.
• 第 2.0.6 条Gas boiler room: a boiler room using natural gas, liquefied petroleum gas, etc. as fuel.
• 第 2.0.7 条Boiler room equipment room: a room used to house boiler auxiliary equipment, such as a fan room, water pump r…
• 第 2.0.8 条Boiler room control room: a room used for centralized monitoring of boiler operating parameters.
• 第 2.0.9 条Boiler room pressure relief area: the opening area used for pressure relief during an explosion, such as pres…
• 第 2.0.10 条Boiler room safety valve discharge pipe: a pipe that directs steam or hot water discharged from the safety va…

Boiler room layout

• 第 4.1.3 条The boiler room should preferably be located in a dedicated room outside the building or in a standalone buil…
• 第 4.1.5 条Oil fired and gas fired boiler rooms shall be located on the ground floor or in the basement level adjacent t…
• 第 4.2.1 条Equipment layout in the boiler room shall ensure convenient operation, maintenance, and passage. The distance…
• 第 4.2.3 条The boiler room should have adequate natural ventilation or mechanical ventilation. For gas fired boiler room…
• 第 4.2.5 条Doors from the boiler room to the outdoors shall open outward; doors from workrooms, oil storage rooms, etc. …
• 第 4.2.6 条The boiler room shall be provided with facilities to prevent liquid spread (such as a threshold or ramp), esp…
• 第 4.2.7 条Facilities unrelated to boiler operation (such as hotel laundry rooms, staff dormitories, etc.) shall not be …
• 第 4.2.9 条The floor in the boiler room shall be made of non combustible materials, level and slip resistant, and shall …
• 第 4.3.1 条Rooms with explosion hazards such as the pressure regulating device room and gas metering room of a gas boile…
• 第 4.3.3 条Gas and fuel oil pipelines in the boiler room shall be provided with emergency shut off valves located in eas…

Fuel system

• 第 6.1.3 条Gas boiler rooms should use low pressure gas (≤0.01MPa), and gas leak alarms and emergency shut off valves sh…
• 第 6.1.5 条Gas piping in a gas boiler room shall be provided with vent pipes led to a safe outdoor location, and the ven…
• 第 6.1.6 条Manual quick shut off valves and automatic shut off valves shall be installed on gas piping and shall be loca…
• 第 6.2.2 条The total capacity of oil storage tanks in a fuel oil boiler room (e.g., hotel standby oil) shall not exceed …
• 第 6.2.5 条Fuel oil pipes should be provided with heat tracing and insulation measures (for heavy oil), and light diesel…
• 第 6.2.6 条The fuel oil system shall be provided with fuel filters and instrumentation for monitoring oil level, oil pre…
• 第 6.3.1 条Gas and fuel oil pipelines shall be provided with electrostatic grounding, and flanged connections shall be p…
• 第 6.3.3 条Fuel pipes shall not pass through non production rooms in the boiler room, such as the electrical distributio…
• 第 6.3.4 条Fuel pipes shall be seamless steel pipes with welded connections; threaded connections are strictly prohibite…

Boiler system

• 第 4.1.3 条The number of boilers should not be less than 2; when one boiler is out of service, the remaining boilers sho…
• 第 4.1.5 条Gas fired or oil fired boilers should be selected for hotel boilers; when coal fired boilers are used, reliab…
• 第 4.2.1 条The rated thermal efficiency of the boiler shall not be lower than the Grade 2 energy efficiency value specif…
• 第 4.2.3 条For boilers used in hotel domestic hot water systems, the outlet water temperature shall be determined accord…
• 第 4.3.2 条Boiler feed pumps shall include a standby pump; when one pump stops operating, the total flow of the remainin…
• 第 4.4.1 条The boiler room shall be equipped with the necessary thermal instrumentation, including steam or hot water ou…
• 第 4.4.4 条The hotel boiler system should be equipped with automatic control devices that automatically adjust the numbe…
• 第 4.5.2 条The boiler blowdown system shall be provided with a blowdown cooling tank or heat exchanger; blowdown water m…
• 第 4.6.1 条The boiler chimney outlet shall be at least 2 m above the roof, and shall be kept away from fresh air intakes…

Heating system

• 第 6.1.2 条The boiler room thermal system shall be designed according to the characteristics of the hotel's heating, ste…
• 第 6.1.3 条When the hotel requires both space heating and domestic hot water supply simultaneously, separate heating and…
• 第 6.1.4 条The boiler room thermal system shall be provided with the necessary regulating, monitoring and safety protect…
• 第 6.2.1 条The steam system design shall meet the pressure, temperature and quality requirements of steam using equipmen…
• 第 6.2.3 条Steam pipes should be equipped with steam traps, and the condensate recovery system should be reasonably laid…
• 第 6.3.1 条The design water temperature, working pressure and circulation mode of the hot water system (heating and dome…
• 第 6.3.3 条The domestic hot water system should be equipped with circulation pumps to ensure that hot water reaches all …
• 第 6.3.5 条When boilers are used to supply domestic hot water directly, the water quality shall comply with the current …
• 第 6.4.1 条Condensate should be recovered and reused as much as possible, with a condensate recovery rate of no less tha…
• 第 6.4.3 条Condensate pipes should be provided with necessary venting, drainage, and anti cavitation measures to ensure …
• 第 6.5.2 条The heating system should be equipped with necessary metering devices (such as heat meters and steam flow met…

Water treatment

• 第 11.1.1 条The boiler room design shall determine the water treatment scheme, including raw water quality, boiler type, …
• 第 11.1.2 条The water treatment system shall ensure that the boiler feedwater and boiler water quality comply with the pr…
• 第 11.2.1 条Feedwater for steam boilers or hot water boilers shall use external chemical water treatment. For steam boile…
• 第 11.2.3 条When the raw water hardness is high, ion exchange softening or alkalinity removal treatment should be adopted…
• 第 11.3.1 条Hot water boiler systems should be equipped with deaeration facilities. For pressurized hot water boilers com…
• 第 11.3.2 条Steam boiler feedwater shall be deaerated; boilers with a rated evaporation capacity ≥6 t/h should use therma…
• 第 11.4.1 条The boiler blowdown system should be equipped with continuous blowdown and intermittent blowdown devices, and…
• 第 11.4.2 条The blowdown rate shall be determined by calculation, generally controlled between 5% and 10%; for systems in…
• 第 11.5.1 条When the boiler room also supplies domestic hot water, the domestic hot water system shall be provided with s…
• 第 11.5.2 条Water treatment for the domestic hot water system should use a fully automatic water softener and should be p…
• 第 11.6.1 条The water treatment system should be provided with sampling points for routine testing of hardness, alkalinit…
• 第 11.6.2 条The water treatment room should be equipped with necessary laboratory testing equipment or engage a third par…
• 第 11.5.1 条Note : Hotel buildings require particular attention to (separate domestic hot water treatment) and 11.3.1 (de…

Flue gas emissions

• 第 11.1.1 条The chimney height of the boiler room shall comply with the current national standard "Emission Standard of A…
• 第 11.1.2 条The flue gas temperature at the boiler room chimney outlet shall meet the design requirements and shall not b…
• 第 11.1.3 条The boiler room chimney should be provided with ports for easy sampling and monitoring, and their locations a…
• 第 11.2.1 条Boiler room flue gas emissions shall be equipped with smoke and dust removal, desulfurization and denitrifica…
• 第 11.2.2 条A rain proof and downdraft prevention device shall be installed at the boiler room chimney outlet, and its im…
• 第 11.3.1 条The boiler room flue gas system should be equipped with reliable explosion proof measures, such as explosion …
• 第 11.3.2 条The insulation, anti corrosion and air leakage prevention measures for the boiler room flue and chimney shall…

Control system

• 第 11.1.1 条The boiler room shall be provided with monitoring, control and alarm systems. For civil buildings such as hot…
• 第 11.1.3 条The boiler room control system should provide display and recording functions for the operating status (start…
• 第 11.2.1 条Boilers should be equipped with automatic control devices that automatically adjust fuel input and air supply…
• 第 11.2.3 条Hot water boilers shall be provided with automatic outlet water temperature regulation and over temperature a…
• 第 11.2.4 条Steam boilers shall be provided with automatic steam pressure regulation and overpressure alarm interlock pro…
• 第 11.3.2 条The boiler room shall be equipped with combustible gas (natural gas/liquefied petroleum gas) concentration de…
• 第 11.3.3 条An interlock device for emergency exhaust shall be provided in the boiler room; when the combustible gas conc…
• 第 11.3.5 条The boiler room shall be provided with out of limit alarms and interlock protection for parameters such as wa…
• 第 11.4.2 条For unattended hotel boiler rooms, a remote monitoring system should be provided to transmit key operating pa…
• 第 11.4.4 条The boiler room control system shall be equipped with a manual/automatic switching function to ensure manual …

Safety requirements

• 第 4.1.3 条The boiler room shall be located on the ground floor or the first basement level (adjacent to an exterior wal…
• 第 4.1.5 条Fuel oil or gas boiler rooms shall be provided with an independent ventilation system and explosion proof equ…
• 第 4.2.1 条The boiler room shall be provided with pressure relief facilities (such as pressure relief windows and lightw…
• 第 4.3.2 条The gas boiler room shall be equipped with combustible gas concentration detection and alarm devices, interlo…
• 第 4.4.1 条Fire extinguishing facilities (e.g., fire sandboxes, fire extinguishers) shall be provided in the boiler room…
• 第 4.5.2 条Doors from the boiler room to the outdoors shall open outward and shall not be sliding or roller shutter door…
• 第 4.6.1 条Electrical equipment in the boiler room (e.g., lighting, control cabinets) shall be explosion proof or flamep…
• 第 4.7.3 条The boiler room should be provided with independent emergency drainage facilities (such as a sump pit and dra…

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