Specification for fire extinguisher 50-litre capacity wheel mounted water type (Gas Cartridge)
1992 Edition

Overview of 50-Litre Wheel-Mounted Water Fire Extinguisher (Gas Cartridge Type)

• Capacity: Holds 50 litres, filled to specified level.
• Operation: Positioned upright; gas cartridge activated by plunger to release water.
• Build Quality: Smooth finish, no sharp edges or burrs.
• Material Standards: As listed in Table 1 (e.g., nozzle made from Leaded Tin Bronze Gr LTB2 per IS 318).
• Carriage Tolerance: ±10 mm for the wheeled frame.
• Referenced Standards: Includes IS 318, IS 319, IS 7328, IS 1239, IS 2190, IS 4984, IS 7328, and others (detailed in Annex A).
• Marking: Permits application of the Standard Mark (Clause 11.1.1).
• Sampling & Compliance: Defined in Annex B to assure product reliability.

Material Sample from Table 1:

Operating Principle Flowchart

flowchart TD
    A[Gas Cartridge] -->|Activated by plunger| B[Gas Released]
    B --> C[Pressurizes Water]
    C --> D[Water Ejected via Nozzle]
    D --> E[Extinguishes Fire]

For comprehensive design, materials, and test details, consult the full IS 13385 document and annexes.

Indian Standards Referenced in IS 13385

IS 13385 incorporates multiple Indian Standards critical for the materials and components of these extinguishers, including:

Key Points:

• Individual components must comply with relevant standards if manufacturer certifications are missing (Clause 1.2.6).
• Usage of the Standard Mark is governed by BIS regulations under the BIS Act, 1986.
• Sampling and conformity protocols are detailed in Annex B.
• Extinguisher capacity is fixed at 50 litres (liquid volume).
• Wheeled carriage dimensional tolerance is ±10 mm (Clause 7.13).

Component Compliance Flowchart

(Refer to annex documentation for visual guidance)

Construction Materials per IS 13385 with Standards

Minimum Wall Thickness for Carbon Steel Body (Clause 7.2)

• Calculated based on internal pressure and material yield strength.

(Refer to IS 13385 for detailed formulas and tables)

Construction Requirements as per IS 13385

Welding Guidelines (Clause 7.2.1)

• Spot welding: Only for attaching fittings; must conform to IS 819:1957.
• Metal arc welding: For principal welds, must follow IS 9595:1980.

Painting (Clause 9.4)

• Protective coatings to comply with IS 2932:1974.

Testing (Clauses 1.2.5 & 10.2)

• Mandatory bursting pressure test (one type test per batch).
• Must meet pressure and safety standards as defined.

Summary Table of Construction Specs

Bursting Pressure Calculation

[ P_b = \frac{2 t \sigma_y}{D} ]

Where:

• (P_b): Bursting pressure
• (t): Wall thickness
• (\sigma_y): Yield strength of material
• (D): Diameter of the component

flowchart TD
    A[Start Construction] --> B{Welding Method?}
    B -->|Spot Welding| C[Follow IS 819:1957]
    B -->|Metal Arc Welding| D[Follow IS 9595:1980]
    C & D --> E[Apply Paint]
    E --> F[IS 2932:1974 Compliance]
    F --> G[Conduct Burst Test]
    G --> H{Pass Burst Test?}
    H -->|Yes| I[Complete Construction]
    H -->|No| J[Rework or Reject]

Ensure all welding, painting, and testing adhere strictly to IS 13385 for safety and compliance.

Anti-Corrosion Treatments as Specified in IS 13385

• Internal Coating (Clause 8.1):

  • Apply lead-tin alloy coating containing at least 10% tin.
  • Methods include electrolytic plating or hot dipping.
  • Minimum coating thickness: 0.012 mm.
  • Thickness measurements conducted per IS 3203:1982.
  • No uncoated areas visible inside or out.

• External Surface Treatment (Clauses 8.1.1 & 8.2):

  • Either the same lead-tin alloy coating as internal surfaces.
  • Or phosphating treatment conforming to IS 3618:1966.

Anti-Corrosion Treatment Summary

Process Flowchart

flowchart LR
    A[Extinguisher Body] --> B[Internal Surface]
    A --> C[External Surface]

    B --> D[Lead-Tin Alloy Coating]
    D --> E[Thickness ≥ 0.012 mm]
    D --> F[Measured as per IS 3203]

    C --> G{Treatment Options}
    G --> H[Lead-Tin Alloy Coating]
    G --> I[Phosphating per IS 3618]

    H --> J[Thickness ≥ 0.012 mm]
    I --> K[Phosphate Layer as per IS 3618]

This treatment regimen ensures the extinguisher’s durability and resistance to corrosion.

Performance Specifications According to IS 13385

• Clause 7.8.4:

  • Nozzle and orifice dimensions must enable effective discharge performance.

• Clauses 10.3.1 to 10.3.2:

  • Define tests for discharge flow rate, spray pattern, and operational range.
  • Ensure minimum extinguishing capacity and functional reliability.

• Clause 1.2.4:

  • Performance tests are compulsory on one sample per production lot.
  • Lot is approved only if sample passes all tests.

• Clause 11.1:

  • General design and construction mandates to maintain consistent performance.

Common Performance Parameters & Formulas

Performance Testing Flow

flowchart LR
    A[Design Nozzle & Orifice] --> B[Calculate Orifice Area]
    B --> C[Verify Discharge Rate & Spray]
    C --> D[Conduct Performance Tests (Clause 10.3)]
    D --> E{Test Passed?}
    E -- Yes --> F[Batch Approved]
    E -- No --> G[Batch Rejected]

Summary: Proper nozzle design combined with performance testing ensures compliance and effective firefighting capability.

IS 13385: Testing Protocols & Sampling Procedures

Sampling for Testing (Clause B-1.2.3 & Table 2)

• Samples are randomly selected from the batch.
• Visual inspections cover Clauses 4-7, 9, and 11.
• Tests include:
  • Hydraulic pressure examination (Clause 10.1).
  • Corrosion resistance checks (Clause 8).

Specific Tests

• Bursting Pressure Test (10.2): One mandatory type test per lot.
• Performance Test (10.3.1): One sample tested; lot approval contingent on passing.

Summary

• Adhere to sample sizes as per batch size.
• Conduct visual, hydraulic, corrosion, bursting pressure, and performance tests.
• Lot passes only if all tests are successful.

flowchart TD
    A[Batch Produced] --> B[Random Sampling]
    B --> C{Sample Size per Table 2}
    C --> D[Visual Inspection]
    C --> E[Hydraulic Test]
    C --> F[Corrosion Test]
    A --> G[Bursting Pressure Test (1 Type Test)]
    A --> H[Performance Test (1 Sample)]
    D & E & F & G & H --> I{Pass All?}
    I -->|Yes| J[Batch Accepted]
    I -->|No| K[Batch Rejected]

Labeling Specifications per IS 13385

Clause 11.1 - Required Markings on Extinguishers:

Each unit must be permanently and clearly marked with:

• Manufacturer’s name or trademark
• Operating instructions in legible and bold letters
• The phrase "WATER TYPE (GAS CARTRIDGE)" prominently displayed
• Nominal liquid charge in litres
• The liquid fill level for charging
• Declaration of hydraulic pressure testing: 3.0 MN/m² (30 kgf/cm²)
• Year of manufacture
• Size of the gas cartridge used

Clause 11.1.1:

• Application of the BIS Standard Mark is permitted to certify conformity.

Annex B - Sampling and Compliance:

• Sampling ensures reliability.
• Each component must conform individually if no manufacturer certificate is available.

Marking Overview Table:

flowchart TD
    A[Fire Extinguisher] --> B[Markings]
    B --> C[Manufacturer Name]
    B --> D[Operating Instructions]
    B --> E[Type: WATER TYPE (GAS CARTRIDGE)]
    B --> F[Nominal Charge (litres)]
    B --> G[Liquid Fill Level]
    B --> H[Hydraulic Test Pressure: 3.0 MN/m²]
    B --> I[Year of Manufacture]
    B --> J[Gas Cartridge Size]
    B --> K[Class 'A' Fire Suitability]
    B --> L[Standard Mark (optional)]

These markings guarantee traceability, safety, and compliance with operational standards.

Sampling and Acceptance Criteria as per IS 13385 Annex B

Key Highlights:

• High reliability is critical given the safety role of fire extinguishers.
• Sampling is a quality control measure during manufacture and assembly.

Sampling Plan (Table 2):

• Samples are randomly drawn from the production batch.
• Visual inspection covers Clauses 4-7, 9, and 11.
• Followed by hydraulic pressure testing (Clause 10.1) and corrosion testing (Clause 8).

Acceptance Requirements:

• Lot is accepted only if all sampled units meet the standard’s requirements.
• Failure in any critical test results in rejection or corrective action.

Process Flowchart

flowchart TD
    A[Received Batch] --> B[Random Sample Selection per Table 2]
    B --> C[Visual Inspection]
    C --> D{Pass Visual?}
    D -- Yes --> E[Hydraulic Pressure Test]
    D -- No --> F[Reject Batch]
    E --> G{Pass Hydraulic Test?}
    G -- Yes --> H[Corrosion Test]
    G -- No --> F
    H --> I{Pass Corrosion Test?}
    I -- Yes --> J[Accept Batch]
    I -- No --> F

This sampling strategy ensures statistical confidence while maintaining strict safety standards.

Wheeled Carriage Details for 50-Litre Water Type Fire Extinguisher as per IS 13385

Critical Parameters (Clause 7.13)

• Wheels: Rubber-tyred, dimensions 250 mm × 50 mm × 25 mm
• Axle: Mild steel rod, minimum diameter 25 mm
• Clearance: Minimum 10 cm between lowest extinguisher part and ground when upright
• Dimensional Tolerance: ±10 mm for the carriage

Body Dimensions (Clause 3.15)

• Cylindrical shape
• Outside diameter: 300 ± 25 mm
• Sheet thickness: Minimum 3.15 mm (mild steel)

Material Summary (Refer Table 1)

Important Notes

• Carriage design ensures stable vertical positioning.
• All edges and burrs must be removed to ensure safety (Clause 9.1).
• Extinguisher capacity is 50 litres.
• Operation involves piercing a gas cartridge via a plunger mechanism.

flowchart TB
    A[Extinguisher Body] -->|Mounted On| B[Wheeled Carriage]
    B --> C[Rubber Tyred Wheels (250x50x25 mm)]
    B --> D[Axle: Mild Steel Rod, Ø 25 mm]
    A --> E[Minimum Ground Clearance: 10 cm]

These specifications ensure the extinguisher’s mobility and safe handling in operational environments.

ECO Mark Optional Criteria as per IS 13385 Clause 11

The ECO Mark scheme encourages environmentally sustainable products alongside ISI certification.

• Precondition: Product must first possess the BIS Standard Mark (ISI Mark).
• Additional Requirements: Must fulfill environmental criteria outlined in the relevant amendments.
• Mandatory Clearances: Manufacturer must provide consents under:
  • Water (Prevention and Control of Pollution) Act, 1974
  • Water (Prevention and Control of Pollution) Cess Act, 1977
  • Air (Prevention and Control of Pollution) Act, 1981
  • Environment (Protection) Act, 1986 (if applicable)
• Marking: ECO Mark is combined with the ISI Mark as a single emblem.
• Manufacturer Choice: ECO Mark usage is optional; ISI Mark alone may be chosen.

Summary Table

This initiative promotes both quality assurance and environmental responsibility.

flowchart LR
    A[ISI Marked Product] --> B{Meets Environmental Criteria?}
    B -- Yes --> C[Apply for ECO Mark]
    B -- No --> D[Use ISI Mark Only]
    C --> E[Submit Pollution Clearances]
    E --> F[Receive Combined ISI + ECO Mark]

Annex A of IS 13385: Reference Indian Standards

This annex enumerates Indian Standards crucial for materials, dimensions, testing, and components associated with 50-litre water type fire extinguishers (gas cartridge operated). Selected key IS numbers and titles include:

Notes:

• These standards cover essential aspects such as materials, dimensions, testing methods, and component specifications vital for manufacturing and quality control.
• Annex B provides sampling and conformity guidelines to assure reliability.
• The Standard Mark application confirms compliance and quality assurance through BIS.

Reference Relationship Diagram

graph TD
  A[IS 13385 Fire Extinguisher Spec] --> B[Material Specs (IS 318, 1239)]
  A --> C[Component Specs (IS 4984, 5382)]
  A --> D[Testing & Maintenance (IS 2190, 9595)]
  A --> E[Manufacturing Dimensions (IS 2643)]
  A --> F[Material Properties (IS 5, 7328)]

For detailed tables and clauses, refer to Annex A and Annex B of IS 13385:1992.

Summary of Sampling and Conformity Protocols (Annex B of IS 13385)

Sampling Plan (Table 2 - Clause B-1.2.2)

Inspection and Testing (Clause B-1.2.3)

• Visual assessment as per Clauses 4-7, 9, and 11.
• Hydraulic pressure testing (Clause 10.1).
• Corrosion resistance testing (Clause 8).

Important Notes:

• Sampling is conducted on production batches under quality control.
• High reliability is mandatory due to the critical safety function.
• Samples must be representative and pass all tests for batch acceptance.

Quality Control Flowchart

flowchart TD
    A[Batch of Fire Extinguishers] --> B[Random Sampling per Table 2]
    B --> C{Visual Inspection}
    C -->|Pass| D[Hydraulic Pressure Test]
    C -->|Fail| E[Batch Rejected]
    D -->|Pass| F[Corrosion Test]
    D -->|Fail| E
    F -->|Pass| G[Batch Accepted]
    F -->|Fail| E

This procedure guarantees stringent quality assurance and product reliability in line with IS 13385 Annex B.