Specification for fire rake
1989 Edition

Overview of Fire Rake Specifications

Scope Details:

• Defines criteria for the fire rake tool, used primarily for clearing and cutting small brush during forest fire line construction.
• Supports domestic manufacturing and procurement of standardized equipment.

Key Details & Notes:

• Dimensions & Allowable Deviations:

  • All measurements expressed in millimeters (mm).
  • Unless noted otherwise, dimensional tolerance is set at ±0.5 mm (Clause 1.5).

• Handle Requirements:

  • Must comply with IS 2892:1980 (Wooden handles for picks and beaters).

• Sampling for Quality Control (Clause 6.1.2.2):

• Marking and Licensing:
  • Application of Standard Mark as per BIS Act, 1986.
  • Ongoing BIS monitoring ensures standard conformity.

Process Flow for Fire Rake Specification

flowchart TD
    A[Fire Rake Specification] --> B[Dimensions in mm]
    B --> C[Tolerance ±0.5 mm]
    A --> D[Handle per IS 2892:1980]
    A --> E[Quality Sampling]
    E --> F{Lot Size}
    F -->|Up to 25| G[Sample of 3]
    F -->|26 to 50| H[Sample of 5]
    F -->|51 to 100| I[Sample of 6]
    A --> J[Standard Mark & BIS Licensing]

Note: Refer to the full IS 12796 document for detailed figures such as Fig. 1 illustrating fire rake dimensions.

Material Requirements for Fire Rake Steel Parts under IS 12796

• Steel Composition (Clauses 2.1 & 1.04):

  • Carbon (C): 0.50% to 1.04%
  • Manganese (Mn): 0.30% to 0.50%
  • Hardness: Between 38 and 48 on Rockwell C scale

• Quality Verification (Clause 6.1.2.3):

  • In absence of manufacturer’s certification, samples from each batch must undergo individual testing to confirm compliance.

• Tolerance Levels (Clause 1.5):

  • Dimensional tolerance defaults to ±0.5 mm unless otherwise noted.

Steel Composition Summary Table

This ensures sufficient mechanical strength and wear resistance for fire rake components.

Summary of Dimensions and Tolerances According to IS 12796

• General Dimensional Tolerance: ±0.5 mm unless specified otherwise (Clause 1.5).
• Units of Measurement: All dimensions expressed in millimeters.
• Handle Specification: Must adhere to IS 2892:1980 standards for wooden handles (Clause 2.2).
• Head Assembly: Comprises four precision-machined blades (Clause 3.1).
• Detailed Dimensions: Depicted in Fig. 1 (not included here), outlining exact measurements and allowable deviations.
• Sampling for Quality Control (Clause 6.1.2.2):

Important Points:

• Default to ±0.5 mm tolerance.
• Handles must conform to IS 2892 dimensions.
• Blades are machined for accuracy.
• Refer to Fig. 1 for exact size specifications.
• Sample sizes support effective quality monitoring.

Fig. 1 should be consulted when available for precise blade and assembly dimensions.

Surface and Painting Requirements as per IS 12796

• Clause 4.1:

  • The tool's surfaces must be free from defects such as cracks, laps, burrs, and roughness.
  • The head of the fire rake should be coated with an appropriate protective paint.
  • The blade area should receive a thin application of oil or an equivalent protective layer to prevent rust.

• Dimensional Tolerance: ±0.5 mm unless otherwise specified (Clause 1.5).

• Measurement Units: All in millimeters.

Surface and Coating Summary

Notes:

• Painting safeguards against corrosion and enhances longevity.
• Oiling blades reduces wear and rust during storage and use.

flowchart LR
    A[Tool Surface] --> B{Quality Requirements}
    B -->|Must be free from| C[Cracks, Burrs, Laps]
    A --> D[Head]
    D --> E[Painted for Protection]
    A --> F[Blade Section]
    F --> G[Oiled with light film]

This treatment ensures the fire rake meets durability and functional standards under IS 12796.

Marking Guidelines and Sampling for IS 12796 Fire Rakes

Marking Instructions (Clause 5.1):

• Each fire rake must display markings indicating:
  • The nominal weight
  • The manufacturer’s initials
  • An approved trade-mark

Sampling Table for Quality Assurance (Clause 6.1.2.2)

Additional Details:

• Use of the Standard Mark is governed by the BIS Act, 1986.
• The Standard Mark certifies conformity under BIS supervision.
• BIS conducts ongoing surveillance to ensure compliance.
• Default dimensional tolerance is ±0.5 mm.
• Measurements are in millimeters.
• For rounding off values, refer to IS 2:1960.

flowchart TD
    A[Fire Rake Manufacturing] --> B[Marking]
    B --> C{Mark Details}
    C -->|Nominal Mass| D[Stamped on Tool]
    C -->|Manufacturer Initials| E[Stamped on Tool]
    C -->|Trade-mark| F[Stamped on Tool]
    B --> G[Quality Sampling]
    G --> H[Samples Based on Lot Size]

These markings provide traceability and quality assurance consistent with IS 12796.

Sampling and Compliance Criteria under IS 12796

Sampling Protocol (Clause 6.1.2.2 & Table 1)

• Samples must be randomly selected from each production lot.
• Sample quantity depends on lot size as follows:

Acceptance Standards

• All selected samples must satisfy visual inspections and specified criteria (Clauses 3, 4, 5).
• Failure of any sample results in rejection of the entire lot.
• Marking per Clause 5.1 must include:
  • Nominal weight
  • Manufacturer’s initials
  • Recognized trade-mark

Additional Remarks

• Use of the Standard Mark aligns with the Bureau of Indian Standards Act, 1986.
• BIS continuously monitors quality to ensure adherence.

flowchart TD
    A[Produced Lot] --> B[Random Sampling]
    B --> C{Sample Size}
    C -->|Up to 25| D[3 Samples]
    C -->|26 to 50| E[5 Samples]
    C -->|51 to 100| F[6 Samples]
    D & E & F --> G[Visual & Specification Testing]
    G --> H{Samples Passed?}
    H -->|Yes| I[Lot Accepted]
    H -->|No| J[Lot Rejected]

This approach provides a statistically valid framework for quality control.