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

IS 8442: Scope & Key Specifications for Foam-cum-Water Monitor

Scope:
IS 8442 covers design, materials, construction, testing, and performance of foam-cum-water monitors used in firefighting systems.

Key Performance Requirements (Clause 9.2)

• Test Pressure: 0.7 N/mm² at nozzle end.
• Test Angle: 30° from horizontal in still air.
• Minimum Discharge Capacity & Horizontal Throw: (Table 4)

Construction Details (Clause 5.2)

• Joints: Welded, screwed, or flanged.
• Screwed joints (except nozzle) must have minimum 20 mm threading length with epoxy sealant.
• Outlet barrel external threads as per IS 2643 Class A.
• Nozzle orifice diameters minimum:
  • 63 mm size: 32 mm
  • 75 mm size: 38 mm
  • 100 mm size: 45 mm
• Nozzle length (L) to ensure performance.

Flange Dimensions (Table 1, Clause 3.1)

Materials (Table 2)

• **Base flange

IS 8442 Key References & Specifications Summary

1. Standards Referenced (Annex A):

• Provisions of referenced standards are integral to IS 8442.
• Always check for the latest editions.

2. Rounding Off (IS 2:1960):

• Final test/analysis values rounded per IS 2 rules.
• Retain significant figures as per specified values.

Foam-cum-Water Monitor (Clause 9.2)

• Test pressure: 0.7 N/mm² at nozzle end
• Angle: 30° from horizontal in still air
• Performance Requirements (Table 4):

Water Monitor (Clause 9.1)

• Test pressure: 0.7 N/mm² at nozzle end
• Angle: 30° from horizontal
• Performance (Table 3):

Key Notes:

• Orifice diameters for 63, 75, 100 mm sizes: 32 mm, 38 mm, 45 mm respectively.
• Nozzle length (L) designed to meet performance criteria.
• Leakage and type tests mandatory.

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

IS 8442: Size and Designation of Water Monitors

Size Denotation (Clause 3.1)

• Size is denoted by the waterway dimension (nominal bore of inlet flange).
• Sizes per Table 1 (Flange Dimensions):

Threads & Nozzle (Clause 5.2)

• Screwed joints (except nozzle) have min 20 mm thread length.
• Outlet barrel threads: External threads as per IS 2643 Class A tolerance.
• Nozzle orifice sizes (Fig. 3):
  • 63 mm monitor → 32 mm orifice
  • 75 mm monitor → 38 mm orifice
  • 100 mm monitor → 45 mm orifice

Performance (Clause 9.1 & 9.2)

Material Specifications (Table 2)

• Mild Steel, Copper Alloy, Stainless Steel options for components.
• E.g., Base flange: IS 6392 (carbon steel) or IS 318 (copper alloy) or IS 6911 (stainless steel).

Summary Diagram: Size Design

IS 8442: Materials - Key Specifications & Tables

1. Materials of Construction (Table 2)

2.

IS 8442 - Key Construction Specifications & Tables

1. Construction (Clause 5.2)

• Monitor construction: welded, screwed, or flanged.
• Screwed joints (except nozzle): min. 20 mm threading length + epoxy sealant + permanent thread lock.
• Barrel outlet threads: External, IS 2643 Class A tolerance.
• Nozzle: standard orifice size (Fig. 3-5), internal threads to suit barrel, external hexagon for tightening.

2. Flange Dimensions (Table 1, Clause 3.1)

(Refer full table for variations)

3. Material Specifications (Table 2, Clause 4)

4. Performance Requirements (

IS 8442: Workmanship and Finish (Clause 6)

• Assembly: Must exhibit good workmanship and finish.
• Surface: Free from burrs and sharp edges.
• Waterway: Should have a smooth finish to ensure unobstructed flow.

Key Specifications Related to Workmanship and Finish

Flange Dimensions (Table 1, Clause 3.1)

Materials (Table 2)

• Mild Steel Construction: IS 6392 / IS 2062 for base flange, IS 11428 for pipe fittings.
• Copper Alloy Construction: IS 318 / IS 304 grades.
• Stainless Steel Construction: IS 6911 plates/sheets, IS 6603 for swivel joints.

Summary Diagram of Workmanship Requirements

flowchart TD
    A[Complete Assembly] --> B[Good Workmanship & Finish]
    B --> C[No Burrs or Sharp Edges]
    B --> D[Smooth Waterway Surface]
    D --> E[Ensures Unobstructed Flow]
    B -->

Anti-Corrosive Treatment per IS 8442 (Clause 7)

• Steel Components (subject to direct water contact):
  Hot dip galvanized after fabrication with a minimum zinc coating thickness of 0.03 mm.
  Thickness measured using a suitable thickness meter.

• Aluminium Components (subject to direct water contact):
  Hard anodized with a minimum thickness of 0.015 mm.

• Painting:
  Final painting with fire red or post office red color conforming to IS 5 (Shade No. 536 or 538).
  Paint shall conform to IS 2932.

Summary Table: Anti-Corrosive Treatment

Key Notes:

• Hot dip galvanizing protects steel from corrosion by zinc sacrificial coating.
• Hard anodizing improves corrosion resistance and surface hardness of aluminium.
• Paint finish ensures additional protection 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[Final Anti-Corrosive Protection]

This treatment ensures durability and corrosion resistance for monitors exposed to water.

IS 8442: Marking & BIS Certification Key Points

Clause 12.2 - BIS Certification Marking:

• Monitors may bear the BIS Standard Mark.
• Use of the Standard Mark is regulated by the Bureau of Indian Standards Act, 1986.
• License conditions for use of the Standard Mark are available from BIS.

Important Specifications for Marking:

• Standard Mark: Indicates conformity to IS 8442.
• Colour for Painting: Fire red or post office red, IS 5 shades No. 536 or 538.
• Paint Specification: Paint must conform to IS 2932.
• Anti-corrosive treatment:
  • Steel parts: Hot dip galvanized with minimum 0.03 mm thickness.
  • Aluminium parts: Hard anodized with minimum 0.015 mm thickness.

Related IS References for Materials & Marking:

Summary Diagram of Marking Flow

flowchart TD
    A[Manufacture Monitor] --> B[Apply Anti-corrosive Treatment]
    B --> C[Paint with IS 2932 Fire Red]
    C --> D[Mark with BIS Standard Mark]
    D --> E[License & Compliance Check by BIS]

Note: For detailed marking dimensions or logo placement, consult the BIS licensing guidelines and IS 8442 Annexures.

IS 8442: Performance Requirements for Monitors

Key Performance Criteria (Clause 9)

• Test Pressure: 0.7 N/mm² at nozzle end
• Test Angle: 30° from horizontal in still air
• Parameters: Minimum discharge capacity & horizontal throw

Minimum Discharge Capacity & Horizontal Throw

(Table 4, Clause 9.2 for Foam-cum-Water Monitor)

Nozzle Orifice Diameter (Minimum)

• 63 mm monitor → 32 mm orifice
• 75 mm monitor → 38 mm orifice
• 100 mm monitor → 45 mm orifice

Additional Notes

• Nozzle length (L) is designed to meet performance.
• Threads and joints must be secured with epoxy sealant and locked to prevent loosening during rotation (Clause 5.2).
• Final test results should be rounded per IS 2:1960.

Summary Diagram of Performance Testing Setup

flowchart LR
    A[Monitor] --> B[Nozzle @ 0.7 N/mm²]
    B --> C[Angle 30° from Horizontal]
    C --> D[Measure Discharge Capacity & Horizontal Throw]
    D --> E{Meets Min. Requirements?}
    E -->|Yes| F[Pass]
    E -->|No| G[Fail]

This ensures monitors meet operational efficiency for firefighting applications.

IS 8442 Leakage Test Summary

Clause 10: Leakage Test

• Test Pressure: 2.3 N/mm² (hydraulic pressure)
• Duration: 5 minutes
• Acceptance Criteria: No leakage allowed in the entire assembly

Related Operational Test (Clause 9.2 Foam-cum-Water Monitor)

• Operative Pressure: 0.7 N/mm² at nozzle end
• Angle: 30° from horizontal in still air
• Minimum Discharge Capacities & Horizontal Throws: (Table 4)

Key Points:

• Leakage test is a type test to ensure hydraulic integrity.
• Test pressure (2.3 N/mm²) is over 3 times the operative pressure (0.7 N/mm²).
• No visible leakage allowed during the 5-minute test.
• Discharge capacity and horizontal throw are verified separately at operative pressure.

Quick Formula for Pressure Testing:

[ P_{test} = 2.3 , \text{N/mm}^2 \quad \text{(constant as per IS 8442)} ]

flowchart LR
    A[Assembly] --> B{Apply Hydraulic Pressure}
    B -- 2.3 N/mm² for 5 min --> C{Check Leakage}
    C -- No Leakage --> D[Pass]
    C -- Leakage --> E[Fail]

This ensures the monitor assembly is leak-tight and performs as per IS 8442 standards.

IS 8442: Type Tests for Monitors (Clause 9.2 Foam-cum-Water Monitor)

Test Conditions:

• Operative pressure: 0.7 N/mm² at nozzle end
• Angle of discharge: 30° from horizontal
• Environment: Still air condition

Key Performance Requirements (Table 4)

• These are minimum values for discharge capacity and horizontal throw.
• This test is a type test to verify monitor performance.

Construction & Threads (Clause 5.2)

• Minimum threading length: 20 mm (except nozzle)
• Threads locked with epoxy sealant to prevent loosening during rotation.
• Nozzle orifice diameters (min):
  • 63 mm size: 32 mm
  • 75 mm size: 38 mm
  • 100 mm size: 45 mm

Summary Diagram

flowchart LR
    A[Operative Pressure 0.7 N/mm²] --> B[Foam-cum-Water Monitor]
    B --> C[Discharge Capacity & Throw Test]
    C --> D{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]

Note: Ensure all materials, threads, and finishes comply with IS 8442 clauses for durability and performance.

IS 8442: BIS Certification Marking Key Points

Clause 12.2 BIS Certification Marking:

• Monitors may be marked with the BIS Standard Mark.
• Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986.
• License for use of the Standard Mark is granted under conditions specified by BIS.

Marking Specifications (Clause 12.1)

Each monitor shall be clearly and permanently marked with:

• Manufacturer's name and trademark
• Year of manufacture
• Discharge capacity (l/min)

Important Notes:

• For compliance, rounding off values should follow IS 2:1960 rules.
• For detailed conditions on Standard Mark usage, manufacturers must contact BIS directly.

Reference Table (Partial List of Related IS Standards)

Summary Diagram

flowchart LR
    A[Monitor] --> B[Marking]
    B --> C[Manufacturer's Name & Trademark]
    B --> D[Year of Manufacture]
    B --> E[Discharge Capacity (l/min)]
    B --> F[BIS Standard Mark (optional)]
    F --> G[License as per BIS Act 1986]

For full licensing details and conditions, contact BIS offices or refer to the Bureau of Indian Standards Act, 1986.