Portable Fire Extinguishers Water Type (Stored Pressure) -Specification

IS 6234: Scope & Key Specifications for Portable Water Type (Stored Pressure) Fire Extinguishers

Scope:

• Covers principle, capacity, material, shape, design, construction, anti-corrosive treatment, and tests for portable water-type stored pressure fire extinguishers.
• Suitable for Class A fires (wood, textiles, paper).
• Maintenance guidelines per IS 2190:1992.

Key Marking Requirements (Clause 12.1)

Each extinguisher must be permanently marked with:

Material & Construction Highlights

• Body: Good finish, free from burrs/sharp edges.
• Metallic parts coating: No mercury, lead, cadmium, chromium VI compounds (max 0.1% natural impurities).
• Stainless steel per IS 6913 allowed.
• Burst pressure of components: ≥ 50 kgf/cm².

Referenced Standards (Annex A)

• IS 2190:1992 - Selection, installation, maintenance of fire extinguishers.
• IS 6913 - Stainless steel specifications.
• IS 14933 - Burst pressure requirements.

Physical Requirements for Plastic Parts (Annex B)

This concise summary covers the scope, marking, material, and key physical requirements for water-type stored pressure extinguishers per IS 6234. For detailed design and

IS 6234: References Summary

IS 6234 references several Indian Standards essential for design, materials, testing, and marking of water-type (stored pressure) portable fire extinguishers.

Key Referenced IS Codes (Annex A):

Marking Requirements (Clause 12.1):

Each extinguisher must be permanently marked with:

• Manufacturer's name/trademark
• Operation method
• "Water type (Stored pressure)"
• Capacity in litres
• "Recharge after use"
• Tested pressure declaration (30 kgf/cm²)
• "Keep this end up"
• Fire class suitability letter
• Year of manufacture and serial number

Physical Properties for Plastic Components (Annex B):

Environmental Considerations:

• Lists of Ozone Depleting Substances (Annex C)
• Atmospheric lifetime of gas agents (Annex D)
• Global Warming Potential (Annex E)

Usage Note:

Refer to IS 2190 for detailed installation and maintenance guidelines.

flowchart LR
    A[IS 6234] --> B[Material Specs (IS 2062, IS 6911)]
    A --> C[Testing Methods (IS 5762, IS 8543)]
    A --> D[Marking & Identification]
    A --> E[Environmental Compliance (Annex C, D, E)]
    A --> F[Maintenance

IS 6234: Principle and Design - Key Points

1. Principle:

• Portable water-type fire extinguishers operate on stored pressure.
• Suitable for Class A fires (wood, textiles, paper).
• Extinguishing agent: water under pressure.

2. Design Specifications (Clause 12.1 & 12.2):

• Body: Smooth finish, free of burrs and sharp edges.
• Markings (Clause 12.1):
  • Manufacturer/trademark
  • Operation method
  • "Water type (Stored pressure)"
  • Capacity in litres
  • "Recharge after use"
  • Tested pressure: 30 kgf/cm²
  • "Keep this end up"
  • Fire class suitability letter
  • Year of manufacture and serial number

3. Materials:

• Metallic parts must be free from mercury, lead, cadmium, chromium VI pigments (max 0.1% natural impurities allowed).
• Plastic nozzle and valve body must meet physical tests (Annex B):

4. Testing:

• Body tested at 30 kgf/cm² pressure.
• Compliance with IS 2:1960 for rounding numerical values.

Summary Table: Marking Requirements

This concise framework ensures safety, operability, and compliance with IS

IS 6234: Materials of Construction - Key Points

1. Material Specifications (Table 1, Clause 5)

2. Minimum Thickness for Austenitic Steel Bodies (Clause 7.1.2)

[ S = \max \left(0.64, , 0.30 \times D \right) \quad \text{(thickness in mm)} ]

• (D) = external diameter (mm)
• Minimum thickness = 0.64 mm (including tolerances)

3. Thickness of Top and Bottom (Clause 7.1.3)

• Thickness after forming ≥ minimum wall thickness of cylinder
• For integral dome/bottom, cylinder thickness ≤ 1

IS 6234: Construction Requirements Summary

1. General Requirements (Clause 12.1 & 7.1.3)

• Cylinder thickness: Top & bottom thickness after forming ≥ minimum wall thickness of the cylinder.
• For integral domes/bottoms, cylinder thickness ≤ 115% of dome/bottom thickness.
• Thickness substitution: Replace '300' with '600' in relevant clauses.

2. Materials of Construction (Table 1, Clause 5)

3. Chemical Resistance

• 2.5 cm sample dipped in 20% H₂SO₄ & 5

IS 6234 - Anti-Corrosive Treatment Key Points

• Internal & External Surfaces:

  • Must be epoxy powder coated with a minimum thickness of 0.050 mm (Clause 8.1).
  • Thickness measurement as per IS 3203 (Method for measuring dry film thickness).
  • Alternative for internal surface: plastic/rubber lining with minimum thickness 0.5 mm.

• Phosphating (Alternate Treatment):

  • External surface may be phosphated as per IS 3618 (Clause 8.3).

• Acid Resistance Test:

  • Sample submerged in 10% HCl for 72 hours at 27 ± 3°C (Clause 3.2).
  • No discoloration, distortion, or deterioration allowed.

Summary Table

flowchart TD
    A[Body Surface] --> B[Epoxy Powder Coating]
    A --> C[Plastic/Rubber Lining (Internal)]
    A --> D[Phosphating (External, Alternate)]
    B --> E[Thickness ≥ 0.050 mm]
    C --> F[Thickness ≥ 0.5 mm]
    D --> G[As per IS 3618]
    H[Acid Resistance Test] --> I[10% HCl, 72h, 27±3°C]
    I --> J[No discoloration/distortion]

This ensures durability and corrosion resistance for fire extinguisher bodies per IS 6234.

Valve and Discharge Fittings (IS 6234: Clause 7.5)

• Discharge Hose & Nozzle (7.5.1):

  • Hose length: 0.6 m
  • Hose screwed to valve body.
  • Nozzle design must meet performance per Clause 10.5 (flow & spray pattern).

• Syphon Tube (7.5.3):

  • Fitted by press fit, soldering, brazing, or threads per IS 2643 (Part 2).
  • Must not disengage fully during use.
  • Notched or secured to prevent unintended discharge restriction.

Key Specifications for Plastic Nozzle and Valve Body (Annex B, Table 1)

Marking Requirements (Clause 12.1)

• Manufacturer name/trademark
• Operation method
• "Water Type (Stored Pressure)"
• Capacity in litres
• "Recharge after use"
• Tested pressure: 30 kgt/cm²
• "Keep this end up"
• Fire class suitability letter
• Year of manufacture and serial number

Summary Diagram: Valve Assembly Components

graph LR
A[Valve Body] -- Screw --> B[Discharge Hose (0.6m)]
B --> C[Nozzle (per Clause 10.5)]
A -- Press fit / Solder / Thread --> D[Syphon Tube]
D -. Notched / Secured .-> A

For detailed thread dimensions, refer IS 2643 (Part 2).

This ensures compliance with IS 6234 for reliable and safe fire extinguisher discharge fittings.

IS 6234 - Performance Test Key Points (Clause 10.5):

• Test Conditions:

  • Temperature: 27 ± 5 ℃
  • Wind-free environment
  • Stream direction: Horizontal

• Performance Requirements:

  • Effective throw of water jet ≥ 6 meters
  • Duration of effective throw ≥ 45 seconds
  • Water discharge: ≥ 95% of total capacity within 120 seconds

Summary Table: Performance Test Criteria

Additional Relevant Specifications:

• Marking (Clause 12.1): Extinguishers must be permanently marked with manufacturer, operation method, capacity (litres), pressure test declaration (30 kgt/cm²), and suitability for fire classes.

• Workmanship (Clause 11): Smooth finish, free from burrs and sharp edges.

flowchart LR
    A[Start Performance Test] --> B{Set extinguisher at 27 ± 5 ℃}
    B --> C[Operate nozzle horizontally in wind-free condition]
    C --> D{Measure water jet throw}
    D -->|≥ 6 m| E[Check duration ≥ 45 s]
    E -->|≥ 45 s| F[Check water discharged ≥ 95% in 120 s]
    F -->|Pass| G[Extinguisher passes performance test]
    D -->|< 6 m| H[Fail Test]
    E -->|< 45 s| H
    F -->|< 95%| H

This ensures reliable firefighting performance under standard conditions per IS 6234.

IS 6234: Marking and Labeling of Fire Extinguishers (Clause 12.1)

Each extinguisher must be clearly and permanently marked with:

• Manufacturer's name or trademark
• Method of operation (prominent letters)
• "Water type (Stored pressure)"
• Capacity in litres
• "Recharge after use"
• Declaration of body tested to pressure of 30 kgf/cm²
• "Keep this end up" during use
• Letter indicating fire class suitability (e.g., A for Class A fires)
• Year of manufacture and Serial Number

Fire Class Letter Marking (Clause 9.3)

• Letter A for Class A fires
• Letter height: 2.5 ± 0.5 cm
• Painted black inside an equilateral triangle
• Triangle side: 5.0 ± 0.5 cm
• Triangle color: Golden yellow

Related Physical Requirements for Plastic Parts (Annex B, Table 1)

Summary Diagram: Marking Layout

graph TD
A[Manufacturer Name] --> B[Operation Method]
B --> C[Water Type (Stored Pressure)]
C --> D[Capacity (Litres)]
D --> E[Recharge After Use]
E --> F[Pressure Test Declaration (30 kgf/cm²)]
F --> G[Keep This End Up]
G --> H[Fire Class Letter (e.g., A)]
H --> I[Year & Serial Number]

This ensures clear identification, safe use, and traceability of extinguishers per IS 6234.

IS 6234 - Test Requirements Summary

1. Marking Requirements (Clause 12.1)

Each extinguisher must be permanently marked with:

• Manufacturer/trade mark
• Operation method
• "Water type (Stored pressure)"
• Capacity (litres)
• "Recharge after use"
• Tested pressure declaration: 30 kgt/cm²
• "Keep this end up"
• Fire class suitability letter
• Year of manufacture & serial number

2. Physical Tests for Plastic Nozzle and Valve Body (Annex B, Table 1)

3. UV Exposure Test (Clause 3.4)

• Expose sample to 27 ± 3 °C xenon-arc UV for 100 min
• Followed by 60 ± 5% RH at 62 ± 5 °C for 20 min
• Repeat cycle 60 times
• Post-test, the cap must withstand specified internal hydrostatic pressure.

Key Pressure Test Formula

• Test Pressure = 30 kgt/cm² (approx. 2.94 MPa)

Visual Summary

flowchart TD
    A[Extinguisher] --> B[Marking as per Clause 12.1]
    A --> C[Physical Tests on Plastic Parts]
    C --> D[Specific Gravity: 1.25 ± 0.02]
    C --> E[Melting Point: 215-225 °C]
    C --> F[Ash Content: 15 ± 1%]
    A --> G[UV Exposure Test]
    G --> H[Cycle: UV + Humidity + Heat x 60]
    H --> I[Hydrostatic Pressure Test]

For detailed test procedures, refer to IS 6234 clauses 12.1, 12.2, Annex B, and referenced IS standards (IS 8543, IS 576

IS 6234: Workmanship and Finish - Key Points & Specifications

Clause 11: Workmanship and Finish

• All extinguisher components must have a smooth finish.
• Must be free from burrs, sharp or jagged edges, and any visual defects.
• Finish should not be injurious or detrimental to users.

Clause 9.1 (Amendment No. 3):

• The body of the extinguisher shall have good finish, clear of burrs and sharp edges.

Coating & Material Requirements:

• Phosphating treatment per IS 3618 may be applied on the external surface (Clause 8.3).
• Metallic coatings must be free from mercury, lead, cadmium, chromium VI pigments (Clause 12.2.5).
• Plastic nozzle and valve body must meet physical test requirements (Annex B):

Marking Requirements (Clause 12.1):

• Manufacturer's name/trademark
• Operation method
• "Water type (Stored pressure)"
• Capacity in litres
• "Recharge after use"
• Pressure test declaration (30 kgt/cm²)
• "Keep this end up"
• Fire class suitability letter
• Year of manufacture and serial number

flowchart TD
    A[Extinguisher Components] --> B[Smooth Finish]
    B --> C[No Burrs or Sharp Edges]
    C --> D[Safe & User-friendly]
    A --> E[Coating: Phosphating (IS 3618)]
    A --> F[Metallic Coating Free from Hg, Pb, Cd, Cr VI]
    A --> G[Plastic Parts Meet IS Physical Tests]

Summary: IS 6234 mandates smooth, defect-free finishes with strict coating and marking standards to ensure safety, durability, and user clarity.

IS 6234: Additional Requirements for ECO Mark

• Eligibility:

  • Any fire extinguisher with BIS Standard Mark qualifies for ECO Mark consideration (Clause 12.1.1).

• Environmental Clearances:

  • Manufacturer must submit consent/clearance as per:
    • Water (Prevention and Control of Pollution) Act, 1974
    • Water Cess Act, 1977
    • Air (Prevention and Control of Pollution) Act, 1981
    • Environment (Protection) Act, 1986 and related rules (Clause 12.1.2).

• Display of ECO Criteria:

  • Products may briefly display criteria based on which ECO Mark is awarded (Clause 12.1.3).

• Labeling:

  • ECO Mark is combined with ISI Mark as a single label indicating environment friendliness.

• Leakage Test (related to quality control):

  • Apply soap solution on joints at 12 kgf/cm² pressure, observe for 10 mins for bubbles (Clause 10.3).

Summary Table for ECO Mark Requirements

This ensures fire extinguishers are not only compliant but environmentally responsible per Indian regulations.

IS 6234 - Referenced Standards & Key Specifications Summary

Referenced Indian Standards (Annex A):
IS 6234 refers to multiple IS codes essential for materials, testing, and components of water-type (stored pressure) fire extinguishers, e.g.:

Key Marking Requirements (Clause 12.1):
Each extinguisher must be permanently marked with:

• Manufacturer's name/trademark
• Operation method (prominent letters)
• "Water type (Stored pressure)"
• Capacity in litres
• "Recharge after use"
• Tested pressure declaration: 30 kgf/cm²
• "Keep this end up"
• Fire class suitability letter
• Year of manufacture and serial number

Material & Physical Properties for Plastic Components (Annex B):

Pressure Testing:
The extinguisher body must be tested to withstand 30 kgf/cm² pressure.

Summary Diagram of Marking Requirements

graph TD
A[Extinguisher Body] --> B[Manufacturer Name/Trademark]
A --> C[Operation Method]
A --> D["Water type (Stored Pressure)"]
A --> E[Capacity (litres)]
A --> F["Recharge after use"]
A --> G[Tested Pressure: 30 kgf/cm²]
A --> H["Keep this end up"]
A --> I[Fire Class Letter]
A --> J[Year & Serial No.]

**Note

Plastic Lining Requirements as per IS 6234

1. Thickness & Coating (Clause 8.1)

• Epoxy powder coating: Minimum thickness = 0.050 mm (internal & external surface).
• Plastic/rubber lining: Minimum thickness = 0.5 mm (alternative to powder coating on internal surface).
• Thickness measurement as per IS 3203.

2. Adhesion Test (Clause 8.2a)

• Subject unfilled extinguisher to 15 kgf/cm² pressure.
• Store for 120 ± 4 hours at 27 ± 5 °C.
• Check internally for:
  • Cracking,
  • Separation or lifting of lining,
  • Bubbles between lining and body.

3. Continuity Test (Clause 8.2b)

• Fill extinguisher to 10 mm below top with 1% m/m NaCl solution + hydrocarbon surfactant (surface tension < 40 MN/m).
• Apply 500 ± 50 MΩ insulation resistance test between metal body and electrode in solution.
• Ensures lining continuity (no leaks or breaks).

Summary Table: Plastic Lining Tests

Notes:

• Refer IS 3203 for coating thickness measurement.
• Surface tension reduction in continuity test ensures proper wetting.
• Plastic lining protects against corrosion and enhances extinguisher life.

flowchart LR
    A[Apply Pressure 15 kgf/cm²] --> B[Store 120 ± 4 h at 27 ± 5 °C]
    B --> C{Examine Lining}
    C -->|No cracks/separation| D[Pass Adhesion Test]
    C -->|Cracks/separation| E[Fail Adhesion Test]
    F[Fill with NaCl solution] --> G[Apply 500 ± 50 MΩ resistance

IS 6234 Key Data on Ozone Depleting Substances (ODS) and Related Specifications

Annex C: List of ODS (Montreal Protocol Controlled)

• Note: ODP values are relative to CFC-11 (assigned 10).

Annex D: Atmospheric Lifetime of Gas-Based Agents

• Requirement: Gas extinguishing agents must have atmospheric life < 1 year.

Annex E: Global Warming Potential (GWP) of Substances (100-year CO₂ Equivalent)

Summary of IS 6234 Clause 12.2 Requirements:

• No ODS in extinguishers (Annex C).
• Gas agents must have atmospheric life < 1 year (Annex D).
• **Chemical