Stand post type water and foam monitor for fire fighting -Specification
2008 Edition

Overview of IS 8442: Specifications for Foam and Water Monitors

Scope:
This standard governs the design, materials, fabrication, testing, and performance criteria of foam-cum-water monitors used in firefighting systems.

Performance Requirements (Clause 9.2)

• Test Pressure: 0.7 N/mm² at the nozzle outlet.
• Test Angle: 30° above horizontal in calm air conditions.
• Minimum Flow and Reach (Table 4):

Construction Guidelines (Clause 5.2)

• Joints may be welded, threaded, or flanged.
• Threaded joints (excluding nozzles) require a minimum thread engagement of 20 mm with epoxy sealing.
• External threads on barrel outlets must comply with IS 2643 Class A.
• Minimum nozzle orifice diameters are:
  • 63 mm size: 32 mm
  • 75 mm size: 38 mm
  • 100 mm size: 45 mm
• Nozzle length is designed to ensure required performance.

Flange Specifications (Table 1, Clause 3.1)

Materials Summary (Table 2)

• Base flange and other components' material specifications are detailed in the standard.

IS 8442: Essential References and Notes

1. Referenced Standards (Annex A):

• Compliance with referenced Indian Standards is mandatory.
• Always verify the most recent versions.

2. Rounding Guidelines (IS 2:1960):

• Final measurement and test results must be rounded as per IS 2.
• Maintain significant digits in accordance with specified requirements.

Performance Testing Details for Foam-cum-Water Monitors (Clause 9.2)

• Test pressure set at 0.7 N/mm² at the nozzle.
• Discharge angle fixed at 30° from horizontal.
• Performance metrics outlined in Table 4:

Performance Testing Details for Water Monitors (Clause 9.1)

• Test pressure: 0.7 N/mm²
• Angle: 30° from horizontal
• Performance values from Table 3:

Additional Information:

• Orifice minimum diameters for 63, 75, and 100 mm monitors are 32, 38, and 45 mm respectively.
• Nozzle length is critical for meeting performance.
• Both leakage and type tests are mandatory.

flowchart LR
    A[Test Setup] --> B[Apply Pressure 0.7 N/mm²]
    B --> C[Set Discharge Angle at 30°]
    C --> D{Monitor Type}
    D -->|Water Monitor| E[Refer Table 3]
    D -->|Foam-cum-Water Monitor| F[Refer Table 4]

IS 8442: Designation and Dimensions of Water Monitors

Size Identification (Clause 3.1)

• The nominal bore of the inlet flange defines the monitor's size.
• Dimensions are listed in Table 1:

Threads and Nozzle Details (Clause 5.2)

• Threaded joints excluding nozzle require a minimum engagement length of 20 mm.
• Barrel outlet threads adhere to IS 2643 Class A tolerances.
• Minimum nozzle orifice diameters:
  • 63 mm monitor: 32 mm
  • 75 mm monitor: 38 mm
  • 100 mm monitor: 45 mm

Performance Parameters (Clauses 9.1 & 9.2)

Material Options (Table 2)

• Components may be constructed from Mild Steel, Copper Alloy, or Stainless Steel.
• Example: Base flange materials include IS 6392 carbon steel, IS 318 copper alloy, or IS 6911 stainless steel.

Diagrammatic Summary: Monitor Sizes and Designations

IS 8442: Material Specifications Overview

1. Construction Materials (Table 2)

2.

IS 8442: Assembly and Construction Requirements

1. Construction Methods (Clause 5.2)

• Monitor bodies may be fabricated using welding, threading, or flanging.
• Threaded connections, apart from nozzles, require at least 20 mm thread length, sealed with epoxy and permanently locked.
• Outlet barrel threads must be external and conform to IS 2643 Class A tolerances.
• Nozzle design includes standard orifice sizes with internal threads compatible with the barrel, plus an external hexagonal shape for tightening.

2. Flange Dimensions (Table 1, Clause 3.1)

(Refer to complete table for all variations)

3. Material Details (Table 2, Clause 4)

4. Performance Standards (

IS 8442: Standards for Workmanship and Surface Finish (Clause 6)

• Assembly Quality: Components must be assembled with high-quality workmanship.
• Surface Condition: No burrs or sharp edges are allowed.
• Waterways: The internal surfaces must be smooth to facilitate unobstructed flow.

Workmanship and Finish Requirements Summary

Flange Details (Table 1, Clause 3.1)

Material Specifications (Table 2)

• Mild steel: IS 6392 / IS 2062 for base flanges, IS 11428 for pipe fittings.
• Copper alloys: IS 318 / IS 304 grades.
• Stainless steel: IS 6911 plates/sheets, IS 6603 for swivel joints.

Workmanship Summary Diagram

flowchart TD
    A[Complete Assembly] --> B[High-Quality Workmanship]
    B --> C[No Burrs or Sharp Edges]
    B --> D[Smooth Interior Surfaces]
    D --> E[Ensures Unobstructed Fluid Flow]

Corrosion Resistance Treatments as per IS 8442 (Clause 7)

• Steel Parts in Contact with Water:

  • Must undergo hot dip galvanization after manufacturing.
  • Zinc coating thickness must be at least 0.03 mm, measured with a thickness gauge.

• Aluminium Components (Contact with Water):

  • Should be treated with hard anodizing.
  • Minimum anodic layer thickness of 0.015 mm is required.

• Painting Requirements:

  • Final paint coat should be fire red or post office red according to IS 5 (shade numbers 536 or 538).
  • Paint used must comply with IS 2932 standards.

Summary Table for Corrosion Treatments

Important Notes:

• Hot dip galvanizing provides sacrificial zinc coating protecting steel from corrosion.
• Hard anodizing enhances aluminium's corrosion resistance and surface hardness.
• Paint finish improves durability and visibility.

flowchart LR
    A[Steel Components] -->|Hot dip galvanized| B[Zinc Coating ≥ 0.03 mm]
    C[Aluminium Components] -->|Hard anodized| D[Anodic Layer ≥ 0.015 mm]
    B & D --> E[Painted with Fire Red (IS 5)]
    E --> F[Comprehensive Anti-Corrosion Protection]

IS 8442: Marking Requirements and BIS Certification

Clause 12.2 - BIS Standard Mark:

• Monitors may display the BIS Standard Mark to indicate conformity.
• Usage of this mark is regulated under the Bureau of Indian Standards Act, 1986.
• Licensing and conditions for mark usage are available through BIS authorities.

Marking Details:

• Markings must be clear and permanent.
• Include manufacturer's name and trademark.
• Indicate the year of manufacture.
• Display the discharge capacity in liters per minute.
• Paint color must be fire red or post office red as per IS 5 (shade Nos. 536 or 538).
• Paint must meet IS 2932 standards.
• Steel components must be hot dip galvanized (≥ 0.03 mm zinc coating).
• Aluminium parts must be hard anodized (≥ 0.015 mm layer).

Related Indian Standards for Marking and Materials:

Marking Process Flow

flowchart TD
    A[Manufacturing Process] --> B[Apply Anti-Corrosive Treatment]
    B --> C[Paint with IS 2932 Fire Red]
    C --> D[Engrave or Print Markings]
    D --> E[Apply BIS Standard Mark (optional)]
    E --> F[Compliance Verification]

Performance Standards for Firefighting Monitors (IS 8442)

Key Performance Parameters (Clause 9)

• Test Pressure: 0.7 N/mm² measured at the nozzle outlet.
• Discharge Angle: Fixed at 30° above horizontal in still air.
• Parameters Monitored: Minimum flow rate and horizontal discharge distance.

Minimum Flow and Reach Specifications

(Values taken from Table 4, Clause 9.2 for foam-cum-water monitors)

Nozzle Orifice Minimum Diameters

• 63 mm monitor: 32 mm
• 75 mm monitor: 38 mm
• 100 mm monitor: 45 mm

Additional Details

• Nozzle length is engineered to meet performance benchmarks.
• Threaded joints require epoxy sealant and thread locking to avoid loosening during operation (Clause 5.2).
• Measurement results should be rounded in accordance with IS 2:1960.

Diagram of Performance Testing Setup

flowchart LR
    A[Monitor] --> B[Apply 0.7 N/mm² Pressure at Nozzle]
    B --> C[Set Discharge Angle to 30°]
    C --> D[Measure Flow Rate and Horizontal Reach]
    D --> E{Does It Meet Minimum Criteria?}
    E -->|Yes| F[Pass]
    E -->|No| G[Fail]

IS 8442: Leakage Testing Procedure

Clause 10: Leakage Test

• Hydraulic Test Pressure: 2.3 N/mm² (equivalent to 23 bar)
• Test Duration: Minimum of 5 minutes
• Acceptance: Absolutely no leakage throughout the monitor assembly

Related Operational Test for Foam-cum-Water Monitors (Clause 9.2)

• Operating pressure of 0.7 N/mm² at the nozzle.
• Discharge angle maintained at 30° from horizontal.
• Minimum flow and reach parameters as per Table 4:

Key Points:

• Leakage testing is a type test to ensure hydraulic tightness.
• The test pressure is more than three times the working pressure.
• No visible leakage is allowed during the 5-minute test period.
• Flow and reach are validated at the working pressure separately.

Testing Process Flow

flowchart LR
    A[Monitor Assembly] --> B[Apply 2.3 N/mm² Hydraulic Pressure]
    B --> C[Maintain for 5 Minutes]
    C --> D{Leakage Present?}
    D -->|No| E[Pass]
    D -->|Yes| F[Fail]

IS 8442: Type Testing Protocols for Foam-cum-Water Monitors (Clause 9.2)

Testing Conditions:

• Operating pressure: 0.7 N/mm² at nozzle outlet.
• Discharge angle: 30° from horizontal.
• Environment: Still air conditions.

Minimum Performance Criteria (Table 4)

• These values represent the minimum acceptable flow and reach for compliance.
• The type test confirms that monitors perform as specified.

Construction and Threading Details (Clause 5.2)

• Thread length minimum of 20 mm for all threaded joints except nozzles.
• Thread locking with epoxy sealant to prevent loosening from rotation.
• Minimum nozzle orifice diameters:
  • 63 mm size: 32 mm
  • 75 mm size: 38 mm
  • 100 mm size: 45 mm

Testing Sequence Diagram

flowchart LR
    A[Operate at 0.7 N/mm²] --> B[Foam-cum-Water Monitor]
    B --> C[Evaluate Flow Rate & Horizontal Reach]
    C --> D{Monitor Size}
    D -->|63 mm| E[1750 l/min, 53 m water, 45 m foam]
    D -->|75 mm| F[2580 l/min, 60 m water, 50 m foam]
    D -->|100 mm| G[3500 l/min, 64 m water, 55 m foam]

IS 8442: Guidelines for BIS Certification Marking

Clause 12.2 - BIS Marking:

• Fire monitors may be marked with the Bureau of Indian Standards (BIS) Standard Mark.
• The use of this mark is governed by the Bureau of Indian Standards Act, 1986.
• Licenses for mark usage are issued subject to BIS conditions.

Marking Specifications (Clause 12.1)

Monitors shall be permanently and legibly marked with:

• Manufacturer's name and trademark.
• Year of production.
• Discharge capacity in liters per minute.

Additional Notes:

• Rounding of values must conform to IS 2:1960.
• For detailed licensing conditions and mark placement, manufacturers should consult BIS.

Related Indian Standards (Partial List)

Marking Workflow

flowchart LR
    A[Monitor Production] --> B[Apply Markings]
    B --> C[Manufacturer Identification]
    B --> D[Year of Manufacture]
    B --> E[Discharge Capacity]
    B --> F[BIS Standard Mark (if licensed)]
    F --> G[Compliance Verification]