Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China, offering explosion-proof construction, safety inspections, renovations, project acceptance, and installation services. We are well-versed in explosion-proof construction standards, boasting experienced construction teams and a wealth of practical experience. We have served major corporations such as PetroChina, LG, Hanlan Environment, BOE, and Sinovac Biotech, earning consistent praise and trust from our clients!
Basic Explosion-Proof Design Standards for Hazardous Areas (Shared by Shenzhen Zhongnuo Testing Technology Co., Ltd.)
1. First, conduct an overall explosion protection design
2. Directed release of explosive energy. Around the explosion source, comprehensively utilize anti-explosion and venting technologies, setting anti-explosion walls and windows in the direction of densely populated areas, office zones, and critical equipment; and venting walls and windows in areas with minimal human traffic and no critical equipment.
3. Establish safe distances. Minimize the placement of office areas, residential zones, and critical equipment areas within distances less than the safe limit, unless necessary; if they are set, implement necessary explosion-proof measures.
4. Conversion of non-explosion-proof buildings to explosion-proof structures. Within the range of less than the safe distance, conduct explosion-proof assessment of the buildings and reinforce those that do not meet the explosion-proof requirements: prevent building collapse; prevent the cracking of brittle materials such as bricks, concrete, glass, etc., resulting in debris.
5. Place explosion-proof shelters in hazardous blast areas.

Based on the basic requirements of GB 15577 "Safety Code for Dust Explosion Prevention," the following five major explosion prevention measures can be adopted for explosion-proof construction and modification in explosive dust environments (shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.).
Explosion-resistant
1. Definition: A containment technology that can withstand the high explosion pressure during an explosion inside a sealed container with combustible dust and gaseous oxidizers or air, preventing the container from being destroyed.
2. Objective: By enhancing container wall thickness and improving material, external damage is minimized even in the event of a dust explosion.
3. Basic Requirements:
When producing and handling powdered materials that can cause explosions, if there is no explosion suppression device and no pressure relief measures, all process equipment should be designed to be explosion-proof and capable of withstanding the overpressure generated by internal explosions without bursting.
(2) The connection parts between various process equipment (such as pipes, flanges, etc.) should have the same strength as the equipment itself. For connections between high-strength and low-strength equipment, explosion-proof devices should be installed.
(3) Equipment that is resistant to explosion pressure and explosion pressure impact should comply with the requirements of GB/T 24626.
Explosion Relief
1. Definition: A controlled explosion technology that allows the high temperature, high-pressure combustion products, and unburned materials generated by an explosion inside the containment vessel to be vented through pre-set weak points to a safe direction before the explosion pressure reaches the vessel's limiting strength, thus preventing the containment vessel from being destroyed.
2. Purpose: To reduce explosion losses by installing explosion relief devices.
3. Methods: Two explosion relief methods, namely flammable and non-flammable explosion relief.
4. Basic Requirements:
(1) If the strength of the process equipment is insufficient to withstand the overpressure caused by internal dust explosion under actual working conditions, explosion relief openings should be installed, facing a safe direction, and their sizes should comply with the requirements of GB/T 15605.
(2) Indoor dust explosion hazard process equipment should be vented to a safe outdoor direction through pressure relief ducts. The pressure relief ducts should be as short and straight as possible, with a cross-sectional area not less than that of the relief opening, and their strength should not be less than the strength of the protected equipment container.
(3) Equipment inside the room that cannot vent to the outside through a pressure relief conduit should be fitted with flameless venting caps.
(4) Process equipment with inline piping should be designed to withstand at least 0.1 MPa of internal overpressure.
3. Explosion Suppression
1. Definition: In the initial stage of an explosion, extinguish the flames and suppress (prevent) the development of dust explosion through physical and chemical actions.
2. Purpose: To detect and extinguish fires, as well as suppress explosions in advance through the installation of an explosion suppression device.
3. Basic Requirements:
Process equipment with a risk of dust explosion should be protected with explosion suppression devices.
(2) If a monitoring-type explosion suppression device is used, it should comply with the requirements of GB/T 18154.
(3) Explosion suppression system design and application shall comply with the requirements of GB/T 25445.
Four, Explosion-proof
1. Definition: Technology that prevents the spread of an explosion after its occurrence through physical and chemical actions.
2. Purpose: To prevent the spread of fire through pipelines or other passageways.
3. Basic Requirements:
(3) Equipment and facilities with a dust explosion hazard that are interconnected by pipelines should be equipped with explosion-proof devices on the pipelines.
(2) Equipment and facilities with dust explosion hazards interconnected by pipelines should ideally be equipped with explosion-proof devices. The shutdown direction should align with the direction of explosion propagation.
Five, Inertization
For processes such as crushing, grinding, drying of powders, and pneumatic conveying through pipelines within sealed containers, inert gases like nitrogen, carbon dioxide, halogenated hydrocarbons, argon, helium, and steam, as well as inert dusts such as fire extinguishing powder, chemical dry powder, and mineral rock powder are introduced. This is to dilute combustible components and reduce the oxygen content in the environment.

Shenzhen Zhongnuo Testing Technology Co., Ltd. offers a range of explosion-proof construction services for hazardous explosive areas.
1. Explosion-proof field inspection and consultation
2. Explosion-proof engineering site construction and renovation
3. Explosion-proof Construction Acceptance
4. Explosion-proof electrical installation, maintenance, and renovation
5. Explosion relief walls, doors, and windows installation
6. Dust Removal Equipment Installation and Retrofitting Construction

Shenzhen Zhongnuo Inspection Technology Co., Ltd. offers explosion-proof construction service in the field of:
Explosive gas environments and hazardous areas with explosive or flammable dust exist in various industries and fields, including petrochemicals, metal smelting, fine chemicals, petrochemical ground facilities (gas stations, refueling stations, petrochemical warehousing and transportation), new energy, special equipment, nuclear power, tunnels, grain processing, wood processing, metal component manufacturing, environmental protection engineering, and more. Ensuring explosion-proof safety in these dangerous areas safeguards the prevention of explosions for both our and the national economy's development.
Explosion-proof electrical改造 and on-site explosion-proof construction consulting services for hazardous areas - Shenzhen Zhongnuo Testing Technology Co., Ltd.