The 2004 edition of IS 2878 outlines comprehensive criteria for portable and trolley-mounted carbon dioxide (CO2) fire extinguishers employed across India. It details the specifications for design, manufacture, testing, performance, labeling, and marking to guarantee dependable and effective firefighting performance, especially for Class B fires. This code is intended for manufacturers, quality assurance personnel, and fire safety engineers involved in the production and certification of CO2 extinguishers.
Overview
The 2004 edition of IS 2878 outlines comprehensive criteria for portable and trolley-mounted carbon dioxide (CO2) fire extinguishers employed across India. It details the specifications for design, manufacture, testing, performance, labeling, and marking to guarantee dependable and effective firefighting performance, especially for Class B fires. This code is intended for manufacturers, quality assurance personnel, and fire safety engineers involved in the production and certification of CO2 extinguishers.
Audience
Contents
Structure
Overview of nominal sizes, discharge durations, and fire ratings. Includes mechanical properties of mild steel bodies and dimensions for different CO2 capacities. Details materials for discharge valves, safety devices, syphon tubes, and discharge horns.
Lists applicable Indian Standards for components such as valves, safety devices, and materials. Contains chemical composition details of aluminium alloys and water compressibility factors relevant to extinguisher design.
Clarifies terms related to water compressibility, body weights, and fire test tray dimensions used in performance assessments.
Specifies mechanical property thresholds including tensile strength, proof stress, bend tests, and hardness values. Describes materials used for various extinguisher components.
Details cylinder dimensions, thicknesses, and design requirements for both portable and trolley-mounted extinguishers. Specifies materials for discharge fittings and restrictions on metal discharge horns.
Explains heat treatment cycles for aluminium alloys including solution treatment, quenching, and artificial aging. Addresses furnace control and metallurgical standards.
Outlines mandatory mechanical tests such as tensile, bend, and hardness tests, along with testing intervals based on production volume. Includes procedures for retesting after material changes or production breaks.
Summarizes mechanical and operational performance requirements, including minimum strength values and paint specifications conforming to IS 2932.
Specifies mandatory markings such as manufacturer identification, operational instructions, 'CARBON DIOXIDE TYPE' label, manufacture and refill dates, and fire class indicators with prescribed sizes and colors.
Details packaging requirements emphasizing recyclability and biodegradability. Discusses environmental restrictions on extinguishing media, including prohibition of ozone-depleting substances and long atmospheric lifetime gases.
Provides sampling percentages based on lot size and criteria for lot acceptance, requiring all tested samples to meet specified standards.
Describes tensile, bend, thickness, and hydraulic tests specific to aluminium cylinders. Includes inspection criteria for neck folds and surface defects.
Details mechanical property requirements, test frequencies, and hardness testing methods. Provides guidance on test pressure design and sample testing flow.
Describes procedures for measuring total and permanent volumetric expansion using water jacket and burette methods, with acceptance limits.
Explains ultrasonic testing techniques for seamless containers, including scanning methods and equipment specifications to ensure wall thickness compliance.
Summarizes statistical sampling plans and acceptance conditions for lots, ensuring consistent quality control.
Frequently Asked
IS 2878 (2004) specifies that portable CO2 extinguishers with mild steel bodies are available in 2 kg and 3 kg capacities, both requiring an 8B fire rating test. Trolley-mounted extinguishers commonly come in 6.5 kg, 9 kg, and 22.5 kg sizes, with defined wheel dimensions for ease of mobility. These extinguishers must perform effectively across temperature ranges from -30°C to +55°C, ensuring continuous discharge within stipulated times.
Cylinder bodies must be certified by the Chief Controller of Explosives. Aluminium alloy bodies are manufactured from specified alloys such as AA 5283, AA 6061, AA 6082, AA 6351, and AA 7060, each conforming to IS 2878 chemical composition requirements. Other components include discharge valves per IS 3224, safety devices as per IS 5903, syphon tubes made from brass (IS 407 Alloy No. 2), copper (IS 1545), or aluminium (IS 738), and discharge horns fabricated from non-conductive materials like polyethylene or fiberglass to ensure safety, especially around electrical fires.
Performance testing includes the horn strength test, which requires the extinguisher horn to withstand a 25 kg static load for 5 minutes immediately after full discharge, after conditioning at 55°C for 18 hours. Coatings on metallic parts must be free from hazardous substances such as mercury, lead, cadmium, and chromium VI pigments. The extinguisher’s construction, shape, and materials are evaluated to confirm compliance with mechanical robustness and operational safety standards.
Discharge duration is measured by ensuring at least 95% of the extinguisher’s contents are expelled continuously within the minimum time specified in Table 1 at 27 ± 2°C, with the extinguisher valve operated at a maximum angle of 45° from vertical. The Class B rating is assigned based on the volume of extinguishing agent required to extinguish the maximum fire size during testing, with minimum values prescribed for various CO2 capacities. Fire size and rating assessments conform to Clause 3.5 and Table 1 of IS 2878.
IS 2878 prohibits the use of ozone-depleting substances (ODS) such as Halon 1211, Halon 1301, chlorofluorocarbons (CFCs), and methyl bromide in fire extinguishers. Extinguishing gases must have an atmospheric lifetime of one year or less, restricting agents with longer persistence like Halon 1301. Coatings on metallic parts must exclude mercury, lead, cadmium, and chromium VI pigments except for trace natural impurities. CO2 is permitted as a substitute agent pending the development of more environmentally friendly alternatives.
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