Code of practice for fire safety of industrial buildings: Cotton textile mills

IS 3079: Scope Summary

• Scope: Covers specifications and requirements for electrical transformers used in textile mills.
• Definitions: Clauses 3.1 to 3.7 define key terms; also refer to SP 45: 1988 for additional definitions.
• Related Standards: Annex A lists Indian Standards necessary for complementary reference.
• Transformer Types: Includes drawing frame transformers, which must comply with IS 1646:1982.
• Minimum Illumination for Fire Fighting (Clause 12.1):

This ensures safety and operational efficiency in mill environments.

For detailed design and testing, consult the full IS 3079 and referenced standards like IS 1646 and SP 45.

IS 3079: Definitions (Clause 3.0)

• Scope of Definitions:
  Definitions in Clauses 3.1 to 3.7 of IS 3079 apply, supplemented by SP 45:1988 (Handbook on Glossary of Textile Terms).

• Referenced Standards (Annex A, Clause 2.1):
  These Indian Standards provide essential adjunct definitions and practices related to fire safety and equipment:

  IS No.	Title
  908 : 1975	Fire hydrant, stand post type
  1642 : 1988	Fire safety of buildings - construction details
  1644 : 1988	Fire safety of buildings - exit requirements
  1646 : 1982	Fire safety of buildings - electrical installations
  2190 : 1979	Portable fire extinguisher selection & maintenance
  3844 : 1966	Internal hydrants and hose-reel installation
  5290 : 1983	Landing valves
  9668 : 1980	Water supplies and fire fighting
  12459 : 1988	Fire protection in cable runs
  SP 45 : 1988	Textile terms glossary

• Key Notes:

  • Definitions are aligned with fire safety and textile industry terminology.
  • For transformer-related terms, IS 1646:1982 applies (Clause 10.10).
  • Use of the Standard Mark is regulated by BIS under the BIS Act, 1986.

Summary Diagram: Definition Sources in IS 3079

graph LR
  IS3079["IS 3079 Definitions (3.1-3.7)"]
  SP45["SP 45:1988 Textile Glossary"]
  AnnexA["Annex A: Related IS Standards"]
  IS1646["IS 1646:1982 (Transformers)"]
  
  IS3079 --> SP45
  IS3079 --> AnnexA
  AnnexA --> IS1646

For detailed definitions, refer directly to Clauses 3.1-3.7 and SP 45:1988.

IS 3079: Site and Compound Layout - Key Specifications

• Compound Area (Clause 5.1):
  Must be sufficient to accommodate manufacturing, processing, storage, and utility buildings with minimum spacing as per IS 3079 requirements (specific distances depend on hazardous material stored).

• Building Construction (Clause 6.1):
  All buildings must comply with IS 1642:1988 for fire safety construction.

• Main Gate (Clause 5.3):

  • Clear width: 6 m
  • Headroom: 5 m
  • At least one additional gate of same size at a suitable location for emergencies
  • Turning circle in front of main gate: minimum 9 m diameter for fire appliance maneuvering

• Internal Roads (Clause 13.1.1):

  • Roads must be motorable and kept clear
  • Minimum clear headroom: 6 m for fire engine passage

Summary Table

flowchart LR
    A[Compound Area] --> B[Manufacturing Building]
    A --> C[Storage Building]
    A --> D[Utility Building]
    A --> E[Processing Building]
    B ---|Spacing as per IS 3079| C
    C ---|Spacing as per IS 3079| D
    D ---|Spacing as per IS 3079| E
    A --> F[Main Gate (6m x 5m)]
    A --> G[Additional Gate (6m x 5m)]
    F --> H[Turning Circle (9m diameter)]
    A --> I[Internal Roads (Clear headroom 6m)]

This layout ensures safe access, emergency evacuation, and fire-fighting operations as per IS 3079.

IS 3079: Building Construction Requirements (Summary)

1. Reference Standard:

• All building construction must comply with IS 1642:1988 (Fire Protection in Cotton Textile Industry).

2. Main Gate Specifications (Clause 5.3):

• Clear width: Minimum 6 m
• Headroom: Minimum 5 m
• Additional gate: At least one more gate with same dimensions for emergency exit
• Turning circle: Minimum 9 m radius in front of main gate for fire appliances

3. Building Types & Fire Resistance (Clause 6):

• Buildings for spinning, preparatory processes, raising, singeing:
  • Fire resistance not less than Type I as per IS 1642
• Utility buildings:
  • Should be Type II as per IS 1642

Quick Reference: Fire Resistance Types (IS 1642:1988)

Diagram: Gate & Turning Circle Layout

graph LR
  A[Main Gate (6m wide, 5m headroom)] --> B[Turning Circle (9m radius)]
  A --> C[Additional Emergency Gate (6m wide)]

Summary: Ensure all buildings meet IS 1642 fire resistance; provide minimum gate sizes and turning circle for fire safety access.

IS 3079: Separating Walls & Fire Compartments Key Points

1. Plinth Area Limits (Clause 6.9)

• Max plinth area per building or compartment: 2,500 m².
• Spinning departments must be divided into two or more compartments by separating walls.

2. Purpose of Separating Walls (Clause 7.1 & 7.3)

• To segregate hazardous or fire-prone sections such as:
  • Cotton storage, willowing, mixing, spinning, dyeing, gas generating, waste plants.
  • Fire pump house, boiler house, transformer house, electric generating station.

3. Separating Walls Between Godowns (Clause 7.2)

• Required between:
  • Cotton (pressed bales) godown
  • Loose cotton/clean waste godown
  • Oily waste godown
  • Oil godown (must be isolated building)
  • Stores for non-hazardous goods

4. Specifications Summary

5. General Design Notes

• Separating walls should be fire-resistant and extend from foundation to roof.
• Compartmentalization limits fire spread and aids firefighting.
• Use materials and thickness as per fire resistance ratings (consult IS 1642 or IS 1643 for fire walls).

flowchart LR
    A[Mill Sections] -->|Separated by| B[Separating Walls]
    B --> C{Compartments}
    C --> D[Spinning Dept. (≥2 Compartments)]
    C --> E[Storage Areas]
    C --> F[Fire Pump House]
    C --> G[Boiler House]
    C --> H[Transformer House]
    C --> I[Electric Generating Station]

For detailed fire resistance ratings and wall thickness, refer to IS 1642 (Fire Resistance Tests) and IS 1643 (Fire Walls).

IS 3079: Spacing Between Buildings and Sections

Key Specifications:

• Plinth Area Limit (Clause 6.9):

  • Max plinth area per building or compartment: 2,500 m²
  • Spinning departments must be subdivided by separating walls into smaller compartments.

• Minimum Spacing (Clause 8.5):

  • Fire pump house, boiler house, transformer house, and electric generating station must be spaced ≥ 15 m from manufacturing and storage sections.

• Utility Buildings (Clause 6.5):

  • Should conform to Type II construction as per IS 1642:1988.

• Machinery Spacing (Clause 9.9):

  • Follow Factories Act, 1948 and related rules for machinery spacing.

Summary Table:

Visual Concept of Spacing:

graph LR
  A[Manufacturing Section] ---|≥15 m| B[Fire Pump House]
  A ---|≥15 m| C[Boiler House]
  A ---|≥15 m| D[Transformer House]
  A ---|≥15 m| E[Electric Generating Station]

Note: Always cross-check with local regulations and the Factories Act for machinery and other spacing details.

IS 3079: Machinery and Process Safety - Key Points

IS 3079 primarily references external regulations for machinery spacing and safety:

• Clause 9.9: Machinery spacing must comply with the Factories Act, 1948, and its rules. This governs safe distances to prevent hazards and allow safe operation and maintenance.

• Fire Safety Illumination (Clause 12.1, Table 12): Minimum illumination levels for fire safety in industrial buildings like cotton textile mills:

Additional Safety Guidelines (General Engineering Practice):

• Machinery Spacing: Maintain clearances for access, ventilation, and emergency egress, typically minimum 1.2 to 1.5 m between machines.
• Fire Safety: Use fire-resistant materials, automatic detection, and suppression systems.
• Process Safety: Follow hazard identification (HAZOP), risk assessment, and emergency planning.

flowchart TD
    A[Factories Act, 1948] --> B[Machinery Spacing]
    B --> C[Safe Operation & Maintenance]
    A --> D[Fire Safety Regulations]
    D --> E[Minimum Illumination]
    E --> F[Working Blocks: 150 Lux]
    E --> G[Godowns: 50 Lux]
    E --> H[Open Compound: 20 Lux]

For detailed machinery spacing and safety, consult the Factories Act and relevant fire safety codes.

IS 3079: Electrical Equipment and Lighting – Key Points

Illumination Requirements (Clause 12.1)

• These lux levels ensure adequate visibility for firefighting and safe operations.

Emergency Lighting (Clause 12.2)

• Emergency lighting systems must be installed to provide illumination during power failures, ensuring safe evacuation and firefighting.

Electrical Installation (Clause 10.1)

• Must comply with IS 1646:1982 for safety and reliability.

Fire Safety Procedure (Clause 11.6)

• Operators and firefighting squad must follow strictly defined procedures during fire emergencies.

Additional Notes:

• Illumination (E) in lux can be calculated by:

[ E = \frac{F \times UF \times MF}{A} ]

Where:

• (F) = Total luminous flux (lumens)
• (UF) = Utilization factor
• (MF) = Maintenance factor
• (A) = Area (m²)

flowchart TD
    A[Electrical Equipment & Lighting] --> B[Illumination Levels]
    B --> C[Working Blocks: 150 lux]
    B --> D[Godowns: 50 lux]
    B --> E[Open Compound: 20 lux]
    A --> F[Emergency Lighting System]
    A --> G[Electrical Installation per IS 1646]
    A --> H[Fire Safety Procedure]

This summary ensures compliance with IS 3079 for safe electrical and lighting design in mills.

IS 3079 Fire Fighting Arrangements - Key Points

• First Aid Fire Fighting:
  Follow IS 2190:1979 for portable fire extinguishers selection, installation, and maintenance.

• Hydrant Systems:

  • Internal hydrants: As per IS 3844:1989
  • External hydrants: As per IS 9668:1980
    These codes specify layout, spacing, pressure, and flow requirements.

• Heavy Cable Protection:
  Follow IS 12459:1988 to protect cables from fire hazards.

• Operational Procedures:
  Clause 11.6 mandates documented fire response procedures for plant operators and fire squads.

• Accessibility:
  Fire equipment (hydrants, hose boxes) must be clearly visible and accessible at all times (Clause 13.1.3).

Typical Hydrant Spacing (from IS 3844:1989)

Fire Extinguisher Selection (IS 2190:1979)

flowchart LR
  A[Fire Detection] --> B[Alert Operators]
  B --> C[Activate Fire Fighting Squad]
  C --> D[Use Hydrants & Extinguishers]
  D --> E[Evacuate if Needed]
  E --> F[Report & Review Procedures]

Summary: IS 3079 refers to other IS codes for detailed firefighting equipment specs. Ensure hydrants, extinguishers, and procedures comply with referenced standards and maintain clear accessibility.

IS 3079 - Illumination Requirements Summary

Key Illumination Levels (Clause 12.1)

Additional Specifications

• Emergency Lighting (Clause 12.2):
  Must be provided to ensure visibility during power failure or fire emergencies.

• Lamp Fittings (Clause 10.4):
  Use dust-tight fittings in dusty areas like willowing, lap breaking, mixing, blow and raising rooms, or wet zones to prevent malfunction.

Practical Notes

• Maintain illumination levels as per the table for effective fire fighting and operational safety.
• Ensure regular maintenance and testing of emergency lighting systems.
• Use appropriate lamp enclosures in dust-prone environments to prolong equipment life and ensure safety.

flowchart LR
    A[Power Supply] --> B[Normal Lighting]
    A --> C[Emergency Lighting System]
    C --> D[Battery Backup]
    D --> E[Emergency Lamps]
    B --> F[Working Blocks (150 Lux)]
    B --> G[Godowns (50 Lux)]
    B --> H[Open Compound (20 Lux)]

This ensures safety and compliance with IS 3079 illumination standards.

IS 3079 – General Safety Provisions: Key Points

• Emergency Lighting (Clause 12.2):
  Emergency lighting systems must be installed to ensure safe evacuation during power failure.

• Heavy Cable Protection (Clause 10.13.5):
  Heavy cables should be protected as per IS 12459:1988, which covers mechanical protection and installation methods.

• Fire Fighting Procedures (Clause 11.6):
  Strictly defined procedures must be followed by plant operators and fire squads during fire emergencies.

• Storage Safety (Clause 13.2.1):
  Material and chemical storage in godowns must comply with relevant IS codes or statutory rules. For new chemicals, follow manufacturer’s safety guidelines.

Additional Notes:

• Emergency Lighting Design:
  Typically, emergency lighting should provide at least 1 lux at floor level along escape routes.

• Cable Protection:
  Use conduits, cable trays, or protective covers to prevent mechanical damage.

flowchart TD
    A[Power Failure] --> B[Emergency Lighting ON]
    B --> C[Safe Evacuation]
    D[Fire Detected] --> E[Operator Action]
    E --> F[Fire Fighting Squad Action]
    F --> G[Fire Controlled]

For detailed cable protection methods, refer to IS 12459:1988.