Requirements for chlorination equipment, Part 4: Gravity feed type gaseous chlorinators

IS 10553 Part 4 (1983) - Scope Key Points

Scope Summary:

• Applies to tubes used in chlorination plants.
• Materials:
  • Phosphorus deoxidised non-arsenical copper (IS:191 Part 8-1980)
  • Phosphorus deoxidised arsenical copper (IS:191 Part 10-1980)
  • Carbon steel (IS:1030-1974)

Minimum Wall Thickness for Tubes:

Chlorine Solubility in Water (wt/wt %):

Important Notes:

• Final test/analysis values must be rounded per IS:2-1960.
• The number of significant figures in results should match those in the standard.
• Material and dimensional tolerances ensure safety and compatibility in chlorination plants.

flowchart TD
    A[Tubes in Chlorination Plant] --> B{Material}
    B --> C[Phosphorus Deoxidised Non-Arsenical Copper]
    B --> D[Phosphorus Deoxidised Arsenical Copper]

IS 10553 Part 4: Types of Chlorinators

Types of Chlorinators (Clause 2.1)

• Wall Mounted: Fixed on walls, suitable for compact installations.
• Pedestal Mounted: Stand-alone units on pedestals, allowing easy maintenance.
• Cylinder Mounted: Directly mounted on chlorine cylinders for portability.

Key Specifications

• Chlorinators must ensure accurate dosing and safe handling of chlorine gas.
• Vacuum feed type chlorinators (Part 2) are preferred for safety and precise control.

Important Table (Solubility of Chlorine Gas in Water) - from Clause 4.1.1

Use this table for designing the solutionizer tower for chlorine dissolution.

Chlorination Requirement (General)

• Chlorine dosage depends on water quality and demand.
• Ensure vacuum feed chlorinators to avoid gas leaks.

flowchart LR
    A[Chlorine Cylinder] --> B[Chlorinator Type]
    B --> C{Mounting Type}
    C -->|Wall Mounted| D[Fixed Installation]
    C -->|Pedestal Mounted| E[Stand-alone Unit]
    C -->|Cylinder Mounted| F[Portable Unit]
    B --> G[Vacuum Feed Mechanism]
    G --> H[Safe & Accurate Dosing]

This summary aligns with IS 10553 Part 4 and related clauses for chlorinator selection and design.

IS 10553 Part 4 - Materials and Components Key Specifications

1. Tubes (Clause 3.3)

• Material:

  • Phosphorus deoxidized non-arsenical copper (IS:191 Part 8-1980)
  • Phosphorus deoxidized arsenical copper (IS:191 Part 10-1980)
  • Carbon steel (IS:1030-1974)

• Minimum Wall Thickness & Tolerances:

2. Other Components (Clause 3.6)

• Metallic parts in contact with chlorine gas:

  • Silver-plated brass or nickel
  • Stainless steel (only for dry chlorine gas)

• Non-metallic parts:

  • Glass, ebonite, chlorine/acid resistant plastic

3. Nuts, Bolts, and Brackets (Clause 3.4)

• Chromium plated brass or cadmium plated mild steel

4. Chlorine Solubility in Water (Clause 4.1.1)

IS 10553 Part 4: Performance Requirements Summary

Key Specifications:

• Material Requirements (Clause 3.6):

  • Metallic parts contacting chlorine gas: silver-plated brass, nickel, or stainless steel (dry chlorine only).
  • Non-metallic parts: glass, ebonite, chlorine/acid-resistant plastics.

• Test Result Rounding (Clause 0.7):

  • Final test or analysis values must be rounded per IS:2-1960.
  • Retain the same number of significant digits as specified values.

Chlorine Solubility (Clause 4.1.1):

Note: Chlorine solubility decreases with increasing temperature.

Practical Use:

• Use solubility values to calculate chlorine dosage in water treatment.
• Ensure all components meet material resistance and mechanical standards for safety and durability.

flowchart LR
    A[Chlorine Gas] --> B[Pressure Reducing Valve]
    B --> C[Moisture Trap]
    C --> D[Regulating Valve]
    D --> E[Chlorine Injection]
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style E fill:#bbf,stroke:#333,stroke-width:2px

This diagram shows the typical flow of chlorine gas through ancillary components ensuring performance compliance.

IS 10553 Part 4: Chlorination Requirements Summary

1. Chlorine Solubility in Water (Clause 4.1.1)

Solubility of chlorine gas in water varies with temperature, critical for designing the solutionizer tower.

2. Design Guidance

• Use the above solubility values to calculate chlorine dosage and solutionizer tower capacity.
• Chlorine gas absorption efficiency depends on temperature; lower temperatures increase solubility.

3. Key Formula for Chlorine Dose Calculation

[ \text{Chlorine Dose (mg/L)} = \frac{\text{Required Chlorine (mg)}}{\text{Volume of water (L)}} ]

Adjust chlorine feed rate based on solubility and water temperature.

flowchart LR
    A[Chlorine Gas] --> B[Solutionizer Tower]
    B --> C[Water at Temp T]
    C --> D[Chlorine Dissolved (based on solubility %)]
    D --> E[Chlorinated Water Output]

Note: Always refer to the exact IS 10553 Part 4 for detailed equipment specifications and safety requirements.

IS 10553 Part 4 (1983) — Installation and Safety Key Points

1. Installation & Safety Reference

• Follow IS 10553 Part 1 (1983) for chlorination plant installation, handling, storage, and safety of chlorine cylinders/drums.

2. Rate of Chlorine Withdrawal (Table 2)

3. Cylinder Connection (Clause 5.2.2)

• For >3 cylinders, arrange connections in groups.
• Change one complete group at a time to ensure continuous operation and safety.

Summary Diagram: Chlorine Cylinder Group Arrangement

graph LR
A[Cylinder Group 1] -->|Connected| Manifold
B[Cylinder Group 2] -->|Connected| Manifold
C[Cylinder Group 3] -->|Connected| Manifold
Manifold --> Chlorination Plant

Safety Tips:

• Store cylinders upright in well-ventilated, shaded areas.
• Avoid sources of ignition and corrosive environments.
• Use proper PPE and follow emergency protocols per IS 10553 Part 1.

For detailed installation and safety procedures, always refer to IS 10553 Part 1 alongside Part 4.

Ancillary Equipment Specifications (IS 10553 Part 4 - 1983)

• Materials:

  • Metallic parts in contact with chlorine gas: silver-plated brass or nickel.
  • For dry chlorine gas: stainless steel allowed.
  • Non-metallic parts: glass, ebonite, chlorine/acid-resistant plastics.

• Components Include:

  • Chlorine gas filter
  • Pressure reducing valves
  • Manometer or discharge rate meter
  • Regulating valve
  • Moisture trap
  • Chlorine pressure gauge
  • Stop valve

Key Table: Rate of Chlorine Withdrawal (kg/day)

Installation & Safety Reference:

• Follow IS 10553 Part 1 (1983) for handling, storage, and safety of chlorine cylinders and drums.

flowchart LR
    A[Chlorine Gas Cylinder] --> B[Pressure Reducing Valve]
    B --> C[Moisture Trap]
    C --> D[Filter]
    D --> E[Regulating Valve]
    E --> F[Discharge Meter / Manometer]
    F --> G[Stop Valve]
    G --> H[Chlorine Application Point]

This flow ensures controlled, safe chlorine gas delivery with ancillary equipment per IS 10553 Part 4.

Control Panel Specifications (IS 10553 Part 4)

• Material:
  • Fibre glass with moisture, chlorine, and acid resistance plastics, or
  • Mild steel with 3 coats of epoxy paint for corrosion protection (Clause 3.1).

Key Tables:

Table 1: Solubility of Chlorine in Water (wt/wt %)

Chlorine solubility decreases with temperature (Clause 4.1.1).

Table 2: Rate of Chlorine Withdrawal from Containers (kg/day)

Important for sizing control panel and safety systems (Clause 6.1).

Summary:

• Use fiberglass or epoxy-coated mild steel panels for durability.
• Design must consider chlorine solubility vs. temperature for dosing.
• Follow IS 10553 Part 1 for installation and safety of chlorine equipment.
• Rate of chlorine withdrawal guides control panel capacity and safety.

flowchart LR
  A[Chlorine Cylinder] --> B[Control Panel]
  B --> C[Chlorine Dose Control]
  B --> D[Safety Systems]
  C --> E[Water Chlorination

IS 10553 Part 4: Solutionizer Tower Design - Key Points

Materials (Clause 3.2)

• Tower body: glazed porcelain, PVC, or rubber-lined mild steel plates.
• Packing: round, water-worn pebbles or pumicestone, porcelain, or acid-resistant plastic rashing rings.

Design Considerations

• Water feed: Constant head supply (Clause 3.2.1).
• Outlet design: Must allow maximum flow to water channel (Clause 3.2.2).

Packing Specifications

General Formula for Flow (for outlet design)

[ Q = A \times v ]

• Q: Flow rate (m³/s)
• A: Cross-sectional area of outlet (m²)
• v: Velocity of water (m/s)

Design outlet area and shape to ensure maximum flow without causing excessive velocity or turbulence.

flowchart TD
    A[Water Feed: Constant Head] --> B[Solutionizer Tower]
    B --> C[Packing: Pebbles / Rings]
    C --> D[Outlet: Max Flow Design]
    D --> E[Water Channel]

Summary: Use corrosion-resistant materials, packed with proper media, maintain constant head, and design outlet for max flow per IS 10553 Part 4.

Manometer Tube Specifications (IS 10553 Part 4 - 1983)

Material:

• Phosphorus deoxidised non-arsenical copper (IS:191 Part 8)
• Phosphorus deoxidised arsenical copper (IS:191 Part 10)
• Carbon steel (IS:1030-1974)

Minimum Wall Thickness & Tolerances

Key Notes:

• Tubes must conform to specified IS standards for material quality.
• Thickness is critical to withstand pressure and avoid rupture.
• Use copper tubes primarily for corrosion resistance in chlorination plants.
• Carbon steel tubes are used where higher mechanical strength is required.

Basic Manometer Pressure Formula:

[ P = \rho g h ]

Where:

• (P) = pressure difference (Pa)
• (\rho) = density of manometer fluid (kg/m³)
• (g) = acceleration due to gravity (9.81 m/s²)
• (h) = height difference of fluid column (m)

flowchart TD
    A[Pressure Source] --> B[Manometer Tube]
    B --> C[Fluid Column Height (h)]
    C --> D[Pressure Calculation: P = ρgh]

For detailed design, always verify tube dimensions and materials per IS code tables and intended pressure range.

IS 10553 Part 4: Moisture Seal - Key Points

The code does not provide a direct clause or formula for the moisture seal but highlights related components and material specifications relevant to moisture sealing in chlorine gas systems.

Key Specifications:

• Materials for Moisture Seal Components:
  • Metallic parts in contact with chlorine gas: silver-plated brass, nickel, or stainless steel (for dry chlorine only).
  • Non-metallic parts: glass, ebonite, or chlorine/acid-resistant plastics.
• Moisture seal is part of the ancillary components including moisture traps, pressure reducing valves, and regulating valves.

Related Table: Chlorine Solubility in Water (wt/wt %)

This solubility data affects moisture seal design to prevent chlorine gas moisture contamination.

Practical Notes:

• Moisture seals prevent water ingress into chlorine gas lines.
• Use moisture traps with materials resistant to chlorine and acid.
• Ensure all metallic parts are corrosion-resistant as per clause 3.6.
• Follow IS 2-1960 for rounding off test results.

flowchart LR
    A[Chlorine Gas Source] --> B[Pressure Reducing Valve]
    B --> C[Moisture Seal / Moisture Trap]
    C --> D[Regulating Valve]
    D --> E[Chlorine Gas Outlet]
    style C fill:#f9f,stroke:#333,stroke-width:2px

This diagram highlights the moisture seal's position in the chlorine gas system.

IS 10553 Part 4: Water at Constant Head

Key Points:

• Water feeding in the solutionizer tower must be maintained at a constant head (Clause 3.2.1) to ensure consistent flow and process stability.
• Maintaining a maximum water level is essential for operational control (Clause None).

Important Table: Solubility of Chlorine in Water (Clause 4.1.1)

Practical Notes:

• Constant head ensures steady hydraulic pressure, avoiding fluctuations in chlorine solubility and reaction rates.
• Solubility decreases with temperature rise; control water temperature to optimize chlorine dissolution.

Formula for Head (h) related to flow rate (Q) in open channel or tank feeding:

[ Q = A \sqrt{2gh} ]

Where:

• ( Q ) = flow rate (m³/s)
• ( A ) = cross-sectional area (m²)
• ( g ) = acceleration due to gravity (9.81 m/s²)
• ( h ) = head (m)

flowchart TD
    A[Water Source] --> B[Constant Head Tank]
    B --> C[Solutionizer Tower]
    C --> D[Chlorine Dissolution]

Summary: Maintain constant water head for stable chlorine solubility (see table) and process efficiency.

IS 10553 Part 4 (1983) — Chlorine Cylinder Connections: Key Points

1. Rate of Chlorine Withdrawal (Table 2)

2. Material Specifications (Clause 3.6)

• Metallic parts in contact with chlorine gas: Silver-plated brass or nickel.
• Dry chlorine gas contact: Stainless steel allowed.
• Non-metallic parts: Glass, ebonite, or chlorine/acid resistant plastic.

3. Ancillary Components (Clause 3.6)

• Chlorine gas filter
• Pressure reducing valves
• Manometer or discharge rate meter
• Regulating valve
• Moisture trap
• Chlorine pressure gauge
• Stop valve

4. Installation & Safety Reference

• Follow IS 10553 Part 1 (1983) for handling, storage, and safety guidelines of chlorine cylinders and drums.

flowchart LR
    A[Chlorine Cylinder] --> B[Pressure Reducing Valve]
    B --> C[Moisture Trap]
    C --> D[Regulating Valve]
    D --> E[Chlorine Gas Filter]
    E --> F[Discharge Meter / Manometer]
    F --> G[Stop Valve]

This ensures safe, controlled chlorine gas delivery with corrosion-resistant materials and proper flow control.

IS 10553 Part 4 - Rate of Chlorine Withdrawal

Key Specifications (Clause 5.1 & Table 2)

• Rate of chlorine withdrawal depends on container size and ambient temperature.
• Exceeding recommended rates may cause liquid chlorine freezing.

Additional Reference: Solubility of Chlorine in Water (Table 1, Clause 4.1.1)

Important Notes:

• Use Table 2 for safe withdrawal rates to avoid freezing.
• Solubility data helps in designing solutionizer towers for chlorination.
• Follow IS 10553 Part 1 for installation, handling, and safety.

flowchart LR
    A[Chlorine Container Size] --> B[Withdrawal Rate (kg/day)]
    C[Ambient Temperature] --> B
    B --> D{Safe Withdrawal?}
    D -- Yes --> E[Normal Operation]
    D -- No --> F[Risk of Freezing]

This ensures safe and efficient chlorine withdrawal while preventing operational hazards.

IS 10553 Part 4 - Safety & Maintenance Key Points

1. Installation & Safety (Clause 6.1)

• Follow IS 10553 Part 1 (1983) for handling, storage, and safety of chlorine cylinders/drums.
• When using >3 cylinders, arrange connections in groups to allow changing one group at a time (Clause 5.2.2).

2. Rate of Chlorine Withdrawal (Table 2)

3. Safety & Maintenance Guidelines

• Ensure proper ventilation and leak detection systems.
• Regular inspection of valves, regulators, and connections.
• Store cylinders upright, secured against falling.
• Use protective equipment during handling.

flowchart TD
    A[Storage of Chlorine Cylinders] --> B[Arrange in Groups if >3 Cylinders]
    B --> C[Withdraw Chlorine as per Table 2]
    C --> D[Monitor Temperature for Withdrawal Rate]
    D --> E[Regular Inspection & Maintenance]
    E --> F[Ensure Safety Measures & Protective Gear]

Summary: Follow IS 10553 Part 1 for safety protocols, use Table 2 for withdrawal rates by temperature, and maintain grouped cylinder connections for operational safety.