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

IS 13385: Scope Summary for 50 Litre Wheel Mounted Water Type Fire Extinguisher (Gas Cartridge)

• Capacity: 50 litres liquid capacity filled to specified level.
• Operation: Upright position; gas cartridge pierced by plunger to discharge water.
• Construction: Good finish, free of burrs/sharp edges.
• Materials: As per Table 1 (e.g., nozzle made of Leaded tin-bronze Gr LTB2 IS 318).
• Wheeled Carriage Tolerance: ±10 mm.
• Referenced IS Codes: Includes IS 318, IS 319, IS 7328, IS 1239, IS 2190, IS 4984, IS 7328, etc. (Annex A).
• Marking: Standard Mark may be applied (Clause 11.1.1).
• Sampling & Conformity: Detailed in Annex B to ensure reliability.

Key Material Specification Example (Table 1 excerpt):

Operational Principle Diagram

flowchart TD
    A[Gas Cartridge] -->|Pierced by plunger| B[Gas Released]
    B --> C[Pressurizes Water]
    C --> D[Water Discharged Through Nozzle]
    D --> E[Fire Extinguishing]

For detailed design, materials, and testing, refer to full IS 13385 standard and its Annexes.

Referenced Indian Standards in IS 13385

IS 13385 references several key Indian Standards essential for components and materials of fire extinguishers. These include:

Key Specifications:

• Components must conform individually if manufacturer’s certificate is absent (Clause 1.2.6).
• Standard Mark usage is governed by BIS under the BIS Act, 1986.
• Sampling and conformity criteria are detailed in Annex B.
• Fire extinguisher body capacity: 50 litres (liquid capacity).
• Tolerance for wheeled carriage: ±10 mm (Clause 7.13).

Summary Diagram: Component Conformity Check

IS 13385: Materials of Construction — Key Specifications & Formulas

Minimum Wall Thickness of Extinguisher Body (Clause 7.2)

• For Carbon Steel Bodies:

  [ t = \frac{P \

IS 13385: Construction Requirements Summary

1. Welding Construction (Clause 7.2.1)

• Spot Welding: For attachment of fittings only, must comply with IS 819:1957.
• Metal Arc Welding: Must comply with IS 9595:1980.

2. Painting (Clause 9.4)

• Paint must conform to IS 2932:1974 for protective coatings.

3. Testing Requirements (Clause 1.2.5 & 10.2)

• Bursting Pressure Test: One type test is mandatory.
• Must meet specified pressure requirements per the standard.

Key Specifications:

Typical Bursting Pressure Formula:

[ P_b = \frac{2 \times t \times \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 Type?}
    B -->|Spot Welding| C[IS 819:1957]
    B -->|Metal Arc Welding| D[IS 9595:1980]
    C & D --> E[Painting]
    E --> F[IS 2932:1974]
    F --> G[Testing]
    G --> H{Bursting Pressure Test}
    H --> I[Conform to Clause 10.2]
    I --> J[Construction Complete]

Ensure all welding, painting, and testing strictly follow the referenced IS codes for compliance and safety.

IS 13385: Anti-Corrosive Treatment Key Points

• Internal Surface Coating (Clause 8.1):

  • Coated with lead-tin alloy (tin ≥ 10%)
  • Application: electrolytic or hot dipping process
  • Minimum thickness: 0.012 mm
  • Thickness measured as per IS 3203:1982
  • No visible uncoated areas internally or externally

• External Surface Coating (Clause 8.1.1 & 8.2):

  • Either lead-tin alloy (same as internal)
  • Or phosphating treatment as per IS 3618:1966

Summary Table for Anti-Corrosive Treatment

Notes:

• Lead-tin alloy coating ensures corrosion resistance inside and outside.
• Phosphating is an alternative external treatment providing a protective phosphate layer.
• Ensure no uncoated areas to maintain corrosion protection integrity.

flowchart LR
    A[Body Surface] --> 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 (IS 3618)]

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

This ensures compliance with IS 13385 anti-corrosive treatment requirements.

IS 13385: Performance Requirements Key Points

• Clause 7.8.4:

  • Nozzle and orifice area must be designed to meet performance criteria ensuring effective discharge.

• Clause 10.3 (10.3.1 - 10.3.2):

  • Specifies detailed performance tests for extinguishers, including discharge rate, spray pattern, and effective range.
  • Tests ensure minimum extinguishing capacity and operational reliability.

• Clause 1.2.4:

  • Performance test is mandatory on one sample per lot.
  • The lot passes only if the sample meets all performance criteria.

• Clause 11.1:

  • Covers general design and construction requirements to ensure performance consistency.

Typical Performance Formulas & Parameters (Based on IS 13385 and general practice):

flowchart LR
    A[Design Nozzle & Orifice] --> B[Calculate Orifice Area]
    B --> C[Ensure Discharge Rate & Spray Pattern]
    C --> D[Conduct Performance Test (Clause 10.3)]
    D --> E{Pass Test?}
    E -- Yes --> F[Lot Conforms]
    E -- No --> G[Reject Lot]

Summary: Design nozzle/orifice per flow and pressure formulas, verify via performance tests (Clause 10.3), and certify lot only if tests pass.

IS 13385 — Key Testing Specifications & Sampling

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

• Samples are taken randomly from the lot.
• Visual examination covers requirements in Clauses 4-7, 9, 11.
• Tests include hydraulic pressure (Clause 10.1) and corrosion (Clause 8).

Specific Tests & Frequency

• Bursting Pressure Test (10.2): One type test per lot; must meet specification.
• Performance Test (10.3.1): One sample tested; must pass for the entire lot to conform.

Summary

• Follow sampling sizes per lot size.
• Conduct visual, hydraulic, corrosion, bursting pressure, and performance tests as specified.
• Lot conformity depends on passing these tests.

flowchart TD
    A[Lot Produced] --> B[Random Sampling]
    B --> C{Sample Size per Table 2}
    C --> D[Visual Examination]
    C --> E[Hydraulic Pressure 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?}
    I -->|Yes| J[Lot Conforms]
    I -->|No| K[Lot Rejected]

IS 13385 - Marking and Labeling Key Points

Clause 11.1 - Mandatory Markings on Fire Extinguishers:

Every extinguisher must be clearly and permanently marked with:

• Manufacturer's name or trade-mark
• Operating instructions in clear, bold letters
• The words "WATER TYPE (GAS CARTRIDGE)" prominently
• Nominal liquid charge in litres
• Liquid level to which it should be charged
• Declaration of hydraulic pressure test: 3.0 MN/m² (30 kgf/cm²)
• Year of manufacture
• Size of gas cartridge

Clause 11.1.1:

• Extinguishers may also carry the Standard Mark of BIS indicating conformity.

Annex B - Sampling and Conformity:

• Sampling criteria ensure high reliability.
• Each component must meet specifications individually if no manufacturer certificate is provided.

Summary Table of Marking Requirements:

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 Level]
    B --> H[Hydraulic Test Pressure: 3.0 MN/m²]
    B --> I[Year of Manufacture]
    B --> J[Gas Cartridge Size]
    B --> K[Standard Mark (optional)]

This ensures traceability, safe operation, and compliance with IS 13385.

IS 13385: Sampling and Criteria for Conformity (Annex B)

Key Points:

• High reliability is essential due to the critical safety function of fire extinguishers.
• Sampling ensures quality control during manufacture and assembly.

Sampling Plan (Table 2):

• Samples are selected randomly from each lot.
• Samples undergo visual examination (Clauses 4-7, 9, 11).
• Followed by hydraulic pressure test (Clause 10.1) and corrosion test (Clause 8).

Criteria for Conformity:

• The lot is accepted if all sampled items meet the specified requirements.
• Failure in any critical test leads to rejection or rework.

Summary Diagram:

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

This sampling plan ensures statistical confidence in product conformity while maintaining safety standards.

IS 13385: Wheeled Carriage Specifications for 50L Wheel Mounted Water Type Fire Extinguisher

Key Specifications (Clause 7.13)

• Wheel size: 250 mm × 50 mm × 25 mm (rubber tyred wheels)
• Axle: Mild steel rod, minimum diameter 25 mm
• Clearance: Lowest part of extinguisher body ≥ 10 cm above ground (vertical position)
• Tolerance: ±10 mm for wheeled carriage dimensions

Body Dimensions (Clause 3.15)

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

Material (Table 1 - Summary)

Important Notes

• The carriage must ensure stable vertical positioning.
• All edges and burrs must be removed for safety (Clause 9.1).
• The extinguisher capacity is 50 litres.
• The extinguisher operates by piercing the gas cartridge with a plunger.

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 Clearance 10 cm from ground]

This ensures mobility and safe operation of the extinguisher on site.

IS 13385 - Optional Requirements for ECO Mark (Clause 11)

The ECO Mark scheme promotes environmentally friendly products alongside the ISI Mark. Key points:

• Eligibility: Product must have the BIS Standard Mark (ISI Mark) first.
• Additional Requirements: Must meet environment-friendly criteria included as amendments in the relevant standards.
• Consent Clearances: Manufacturer must provide clearances 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 ISI Mark as a single symbol.
• Optional: Manufacturers may opt only for ISI Mark without ECO Mark.

Summary Table

This ensures products are both quality certified and environmentally responsible.

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

IS 13385 Annex A: List of Referred Indian Standards

This annex lists essential Indian Standards referenced for materials, testing, and components related to 50-litre water-type fire extinguishers (gas cartridge operated). Key IS numbers and titles include:

Additional Notes:

• These standards cover materials, dimensions, testing methods, and component specifications critical for manufacturing and quality control.
• Annex B details sampling and conformity criteria for reliability.
• Use of the Standard Mark ensures compliance and quality assurance as per BIS regulations.

Summary Diagram of Reference Relationships:

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 exact clauses, refer to Annex A and B of IS 13385:1992.

IS 13385: Sampling and Criteria for Conformity (Annex B Summary)

Sampling Plan (Table 2 - Clause B-1.2.2)

Testing & Inspection (Clause B-1.2.3)

• Visual examination per Clauses 4-7, 9, 11.
• Hydraulic pressure test (Clause 10.1).
• Corrosion test (Clause 8).

Key Notes:

• Sampling is from lots produced under quality control.
• High reliability is mandatory due to critical safety function.
• Samples must represent the lot and pass all tests to confirm conformity.

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

This ensures stringent quality control and reliability per IS 13385 Annex B.