IS 9222:2000 (Part 1) is the Indian Standard (BIS) for recommendations for handling and dosing devices for chemicals for water treatment, part i: coagulants. This standard provides recommendations for the selection, handling, and operation of equipment used for dosing coagulants in water treatment plants. It covers both dry feeding and solution feeding systems, including guidance on storage, solution preparation, equipment types, and materials of construction to ensure accurate and reliable chemical application.
Recommendations for handling and dosing devices for chemicals for water treatment, Part I: Coagulants
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Accuracy of Gravimetric Dry Feeder | Should be within ± 1 percent by weight. | Weigh-belt feeders shall be accurate to within 1 to 2 percent of the set feed rate. | Ten States Standards (2022) |
| Liquid Coagulant Storage Capacity | A minimum of 15 days storage capacity should be provided in at least two tanks. | Minimum bulk storage capacity of 1.5 times the maximum monthly usage or one truckload, whichever is larger. | AWWA B301-18 |
| Day Tank (Solution Tank) Capacity | Should hold at least 8 hours supply at maximum withdrawal rate. | Day tanks shall have a minimum capacity to ensure uninterrupted operation, typically 8-24 hours at the design feed rate. | Ten States Standards (2022) |
| Materials for Liquid Alum Piping | SS 316, Polyethylene, PVC, FRP. | Schedule 80 PVC, CPVC, Polyethylene (PE), or Fiberglass-Reinforced Plastic (FRP). | AWWA B301-18 |
| Anti-Siphon Device on Discharge Line | Recommends installation of a siphon breaker. | Feed lines shall be equipped with an anti-siphon device when the point of discharge is lower than the solution tank level. | Ten States Standards (2022) |
| Dry Feeder Hopper Slope | Not less than 60 degrees to the horizontal. | Hopper walls should be sloped at least 60 degrees from the horizontal. | General design principle in AWWA/Ten States guidance. |
| Requirement for Agitator in Solution Tank | Recommends mechanical agitators with specified power calculation. | Mechanical mixers shall be provided for all dissolving tanks. | Ten States Standards (2022) |