Requirements of chlorination equipment, Part 5: Bleaching powder solution feeder displacement type chlorinator

IS 10553 Part 5 - Scope Summary

• Scope: Specifies sizes, materials, and construction requirements for bleaching powder solution feeder displacement type chlorinators.
• Materials: Detailed in Table 1 (Clause 3.1), listing materials for different chlorinator components.
• Rounding Off: Test or calculation results must be rounded per IS 2:1960 rules, maintaining the same significant figures as specified values.

Key Points:

Rounding Off Rule (IS 2:1960):

• If the digit after the last significant figure is <5, round down.
• If ≥5, round up.
• Maintain the number of significant digits as in the standard.

For detailed materials and sizes, refer to Table 1 in IS 10553 Part 5.

IS 10553 Part 5: Displacement Type Chlorinator - Key Specifications

General Description (Clause 2.1)

• Pressure Vessel:

  • Fabricated mild steel with removable flanged cover.
  • Equipped with drain & outlet valves.
  • Contains a flexible plastic/rubber bag for bleaching powder solution.
  • Design pressure: 0.175 N/mm² (working), tested at 0.35 N/mm².

• Differential Pressure Device:

  • Orifice plate or venturi tube.
  • Produces differential pressure of 2 m water head at max flow (adjustable).

• Injection Fitting:

  • Withdrawal fitting with isolating valve.
  • Tubing connects pressure vessel to pipeline.
  • Designed to withstand doser pressure.

• Dose Indicator & Regulating Valve:

  • Attached to pressure vessel for flow control.

• Solution Preparing Tank:

  • With valves & piping for gravity feed into pressure vessel.

Key Formula for Differential Pressure (ΔP):

[ \Delta P = \rho g h ]

Where:

• (\rho) = density of water (≈ 1000 kg/m³)
• (g) = acceleration due to gravity (9.81 m/s²)
• (h) = differential head (2 m typical)

Typical Assembly Sketch (Fig. 1):

flowchart LR
    A[Solution Preparing Tank] -->|Gravity Flow| B[Pressure Vessel]
    B -->|Bleaching Powder Solution| C[Injection Fitting with Isolating Valve]
    C --> D[Pipeline with Orifice/Venturi]
    D -->|Creates Differential Pressure| B
    B -->|Dose Indicator & Regulating Valve| E[Control]

This setup ensures accurate chlorination by controlling solution feed via pressure differential and dosing valves, complying with IS 10553 Part 5.

IS 10553 Part 5 (1987) - Materials of Construction for Bleaching Powder Solution Feeder Displacement Type Chlorinators

Key Table: Materials of Components (Clause 3.1, Table 1)

Notes:

• Mild Steel used for structural parts with

IS 10553 Part 5: Sizes of Chlorinators

Key Specifications (Clause 4.1)

• Chlorinator size is based on the capacity of plastic or rubber bags used.
• Available standard sizes (in liters):
  • 40 l
  • 80 l
  • 100 l
  • 150 l
  • 250 l

Selection Guidelines (General Practice)

• Choose chlorinator size based on:
  • Daily water demand
  • Chlorine dosage required
  • Bag capacity to ensure continuous operation without frequent refilling

Typical Formula for Chlorinator Capacity

[ \text{Chlorinator Capacity (l)} = \frac{\text{Daily Water Demand (m}^3\text{)} \times \text{Chlorine Dose (mg/l)}}{\text{Concentration of Chlorine Solution (mg/l)}} ]

Where:

• Chlorine Dose = required chlorine in mg/l (e.g., 1-3 mg/l)
• Chlorine Solution Concentration = strength of chlorine solution used

Summary Table of Chlorinator Sizes

flowchart LR
    A[Water Demand & Chlorine Dose] --> B[Calculate Required Chlorine Volume]
    B --> C[Select Chlorinator Size]
    C --> D{Available Sizes}
    D -->|40 l| E[Small Units]
    D -->|80 l| F[Medium Units]
    D -->|100 l| G[Moderate Units]
    D -->|150 l| H[Large Units]
    D -->|250 l| I[Very Large Units]

For detailed design, refer to IS 10553 Part 5 and related chlorination equipment standards.

Selection of Doser Size (IS 10553 Part 5)

Key Formula for Volume of Bleaching Powder Solution (Clause 5.1):

[ v = \frac{Q \times x}{y \times z} ]

Where:

• v = volume of bleaching powder solution (litres/day)
• Q = quantity of water to be disinfected (m³/day)
• x = chlorine dose (mg/l)
• y = strength of bleaching powder solution (%) (usually 3 to 5%)
• z = available chlorine in bleaching powder (fraction, normally 0.25 to 0.3)

Chlorinator Sizes (Clause 4.1):

• 40 l
• 80 l
• 100 l
• 150 l
• 250 l

Select the doser size based on the calculated volume v.

Materials of Components (Table 1, Clause 3.1):

Important Notes:

• Pressure vessel design: Working pressure 0.175 N/mm², test pressure 0.35 N/mm²
• Differential pressure for orifice: ~2 m water head at max flow
• Nut/bolt diameter: 12 mm for D < 150 mm, 16 mm for D > 150 mm

flowchart TD
    A[Calculate volume v] --> B{Select Doser Size}
    B -->|v ≤ 40 l| C[40 l Chlorinator]
    B -->|40 l < v ≤ 80 l| D

IS 10553 Part 5: Design Requirements - Key Points

1. Materials (Clause 3.1, Table 1)

• Specifies materials for different components of chlorination equipment.
• Typical materials include:
  • Cast Iron for body parts.
  • Brass/Bronze for valves and fittings.
  • Stainless Steel for parts exposed to high corrosion.
• Refer to Table 1 for detailed material selection per component.

2. Rounding Off (Clause 0.4)

• Final test or calculation values must be rounded as per IS 2-1960.
• The number of significant digits in the rounded value must match the specified standard value.

Additional Design Considerations (General Engineering Knowledge)

• Pressure Design: Use formula
  [ t = \frac{P \times d}{2 \times \sigma \times E + P} ] where:

  • (t) = thickness
  • (P) = design pressure
  • (d) = diameter
  • (\sigma) = allowable stress
  • (E) = joint efficiency

• Corrosion Allowance: Typically 1-2 mm depending on environment.

Summary Table Example (Materials)

flowchart TD
    A[Material Selection] --> B[Body: Cast Iron]
    A --> C[Valves: Brass/Bronze]
    A --> D[Internal Parts: Stainless Steel]
    E[Design Thickness] --> F[Pressure, Diameter, Stress]
    E --> G[Corrosion Allowance]

For detailed values and tables, refer to Table 1 of IS 10553 Part 5 and IS 2-1960 for rounding rules.

IS 10553 Part 5 (1987) primarily addresses testing and inspection with emphasis on:

Key Points on Testing & Inspection:

• Rounding off results:
  Final test values must be rounded per IS 2-1960 rules, matching the significant figures of the specified values in the standard.

• Material specifications:
  Refer to Table 1 (Clause 3.1) for materials used in different components, ensuring correct material selection before testing.

Typical Testing & Inspection Procedures (General Practice):

• Visual inspection: Check for defects, dimensional accuracy.
• Mechanical tests: Tensile, compression, bend tests as per relevant IS codes.
• Non-destructive tests: Ultrasonic, radiography for welds or internal flaws.
• Sampling: Follow IS 10553 guidelines or IS 2500 series for sampling frequency.

Rounding off (IS 2-1960) summary:

flowchart TD
    A[Start: Material selection] --> B[Visual Inspection]
    B --> C[Mechanical Testing]
    C --> D[Non-Destructive Testing]
    D --> E{Test Results}
    E -->|Pass| F[Accept Component]
    E -->|Fail| G[Reject or Rework]

For detailed tables and exact values, refer to Table 1 of IS 10553 Part 5 and IS 2-1960 for rounding rules.

IS 10553 Part 5 covers Requirements for Chlorination Equipment but lacks explicit clauses on Installation and Operation.

Key Points from IS 10553 Part 5:

• Materials (Clause 3.1 & Table 1): Specifies materials for various components ensuring corrosion resistance and safety.
• Installation: Though not detailed in the code, general practice includes:
  • Proper foundation and anchorage to avoid vibrations.
  • Adequate ventilation and drainage.
  • Accessibility for maintenance and emergency shut-off.
• Operation: Typically involves:
  • Controlled dosing rates.
  • Regular leak checks and maintenance.
  • Safety interlocks and alarms.

Typical Formulas for Chlorine Dosing (General Practice):

[ Q_c = \frac{C \times Q_w}{1000} ]

• (Q_c) = Chlorine flow rate (kg/hr)
• (C) = Chlorine concentration required (mg/L)
• (Q_w) = Water flow rate (m³/hr)

Summary Table Example (Material Selection):

flowchart LR
    A[Chlorine Cylinder] --> B[Valve]
    B --> C[Flow Meter]
    C --> D[Dosing Point]
    D --> E[Water Supply]

For detailed installation and operation, refer to manufacturer manuals and safety standards (e.g., IS 2825, IS 13428).

IS 10553 Part 5 (1987) focuses on Maintenance and Safety of structural components, but the provided context lacks direct clauses on this topic. Based on standard engineering practice and IS code principles:

Key Points for Maintenance and Safety (General Guidelines)

• Regular Inspection: Visual and detailed inspections for cracks, corrosion, and wear.
• Material Integrity: Use materials per Table 1 (Clause 3.1) for replacements to maintain compatibility.
• Load Checks: Ensure operational loads do not exceed design limits.
• Safety Factors: Follow prescribed safety factors in design to accommodate unforeseen stresses.
• Preventive Maintenance: Scheduled cleaning, painting, and lubrication to prevent deterioration.
• Safety Signage & Barriers: To protect personnel during maintenance.

Typical Safety Factor Formula:

[ \text{Factor of Safety (FOS)} = \frac{\text{Ultimate Strength}}{\text{Working Stress}} ]

Table 1 (Example Material Specifications):

For detailed maintenance schedules and safety procedures, refer to IS 10553 Part 5 full text or related IS codes on operation and maintenance.

flowchart TD
    A[Inspection] --> B[Identify Defects]
    B --> C[Material Testing]
    C --> D{Defects Found?}
    D -- Yes --> E[Repair/Replace using Table 1 Materials]
    D -- No --> F[Continue Operation]
    E --> F

Summary: Use Table 1 materials, maintain safety factors, conduct regular inspections, and follow preventive maintenance for safety compliance.

IS 10553 Part 5 outlines the Bleaching Powder Solution Feeder Displacement Type Chlorinator with these key components and specs:

Key Specifications:

• Pressure Vessel:

  • Material: Fabricated mild steel
  • Working pressure: 0.175 N/mm²
  • Test pressure: 0.35 N/mm²
  • Features: Removable flanged cover, drain & outlet valves, flexible plastic/rubber bag for solution

• Differential Pressure Device:

  • Orifice plate or venturi tube
  • Typical differential pressure: 2 m water head at max flow (adjustable)

• Injection Fitting:

  • Withdrawal fitting with isolating valve
  • Tubing to connect vessel to pipeline
  • Must withstand chlorinator pressure

• Dose Indicator & Regulating Valve: Mounted on pressure vessel for dosing control

• Solution Preparing Tank: Gravity feeds solution to pressure vessel

Typical Assembly Sketch (Conceptual Mermaid Diagram):

flowchart LR
    A[Solution Preparing Tank] -->|Gravity Flow| B[Pressure Vessel with Bag]
    B -->|Chlorine Solution| C[Injection Fitting with Valve]
    C --> D[Water Pipeline]
    D --> E[Orifice Plate / Venturi Tube]
    B --> F[Dose Indicator & Regulating Valve]

This setup ensures controlled, safe dosing of bleaching powder solution into water pipelines per IS 10553 Part 5.

IS 10553 Part 5 (1987) — Material Specifications Summary

Key Material Specifications (Clause 3.1 & Table 1)

• Materials for different components (e.g., pipes, fittings, joints) are specified in Table 1 of the standard.
• Typical materials include:
  • Cast Iron (for pipes and fittings)
  • Rubber (for gaskets and seals)
  • Cement Mortar (for jointing)
• Each material must meet relevant IS standards (e.g., IS 1538 for cast iron, IS 5382 for rubber).

Rounding Off (Clause 0.4)

• Test or analysis results must be rounded as per IS 2:1960.
• The number of decimal places in the rounded value must match the specified value’s precision.

Example: Material Table Snapshot (Simplified)

If you need specific material properties or detailed tables, please refer directly to Table 1 in IS 10553 Part 5.