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IS 10553:2000 (Part 4) is the Indian Standard (BIS) for requirements for chlorination equipment, part 4: gravity feed type gaseous chlorinators. This standard specifies the requirements for displacement-type chlorinators designed to feed a solution of bleaching powder for water disinfection. It covers the materials, construction, performance criteria, and testing methods for these feeders, which are typically used in smaller water supply systems.
Requirements for chlorination equipment, Part 4: Gravity feed type gaseous chlorinators
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Ensure all wetted parts are made of specified corrosion-resistant materials (FRP, PVC, HDPE) to prevent rapid degradation from the chlorine solution.
! These feeders are prone to clogging from insoluble matter in bleaching powder; regular cleaning and use of a settling tank is crucial for reliable operation.
! Ideal for rural or small-scale water schemes where simplicity and low capital cost are more important than high dosing precision.
AWWA B301-16American Water Works Association (AWWA), USA
HighCurrent
Liquid Chlorine
Covers liquid chlorine for water and wastewater treatment, including safe handling, storage, and equipment.
AS/NZS 2927:2001Standards Australia / Standards New Zealand, Australia/New Zealand
HighCurrent
The storage and handling of liquefied chlorine gas
Specifies requirements and recommendations for the safe storage and handling of liquefied chlorine gas in containers.
CI Pamphlet 1The Chlorine Institute (CI), USA
MediumCurrent
Chlorine Basics
Provides fundamental information on chlorine properties, safety, containers, and emergency response, underpinning plant design.
BS EN 937:2015British Standards Institution (BSI) / European Committee for Standardization (CEN), UK/Europe
MediumCurrent
Chemicals used for treatment of water intended for human consumption - Chlorine
Focuses on the purity of chlorine for potable water but includes annexes on safe handling and use.
Key Differences
≠IS 10553 is more prescriptive in certain areas (e.g., 'floor level shall be higher than surrounding ground'), whereas standards like AWWA B301 and CI pamphlets may lean towards performance-based goals (e.g., prevent accumulation of chlorine gas).
≠International standards like AS/NZS 2927 specify a quantitative fire-resistance level for storage rooms (e.g., 4 hours), while IS 10553 gives a more general requirement of 'fire-resistant construction'.
≠IS 10553 does not specify flow rates for emergency showers and eyewash stations, whereas international practice refers to standards like ANSI/ISEA Z358.1 which mandates specific minimum flow rates (e.g., 20 GPM for showers).
≠While IS 10553 recommends a neutralization system for leaks, specialized international documents like CI Pamphlet 90 provide far more detailed engineering guidance on the design and operation of large-scale emergency chlorine absorption (scrubber) systems.
Key Similarities
≈All standards mandate the storage of chlorine containers in a dedicated, locked, and well-ventilated room, segregated from incompatible chemicals, high-traffic areas, and heat sources.
≈The requirement for specific emergency repair kits (universally known as Kit A for cylinders and Kit B for ton containers) and the use of Self-Contained Breathing Apparatus (SCBA) for emergency response is a common principle.
≈All standards emphasize the need for mechanical handling systems (e.g., hoists on monorails) for ton containers and strictly prohibit unsafe manual handling like rolling containers on their edges.
≈The principle of having ventilation exhaust inlets located near the floor level to capture the heavy chlorine gas is a universal safety design requirement found in IS 10553 and its international counterparts.
≈All standards stress the critical importance of comprehensive training for all personnel involved in the handling, operation, and maintenance of chlorination systems.
Parameter Comparison
Parameter
IS Value
International
Source
Emergency Ventilation Rate
One complete air change per minute (60 ACH)
One complete air change in not more than one minute (60 ACH) is a common recommendation.
What is the primary application of this chlorinator type?+
It's used for disinfecting water in small to medium-sized water treatment facilities, particularly in rural water supply schemes where gas chlorination is not feasible.
What are the specified materials for construction?+
The code requires corrosion-resistant materials like Fiber Reinforced Plastic (FRP), PVC, HDPE, or suitable grades of stainless steel to handle the aggressive bleaching powder solution (Clause 4).
What is a major operational challenge with these feeders?+
A common issue is clogging caused by impurities and precipitates from the bleaching powder. This necessitates regular maintenance, cleaning, and preparation of a clear supernatant solution.
What is the rated dosing capacity covered by this standard?+
The standard covers chlorinators with rated capacities of 200, 400, and 1000 g/h of available chlorine.