Specification for galvanized mild steel fire bucket

IS 2546: Scope - Key Specifications & Tables

1. Scope Overview

IS 2546 covers specifications for fire buckets including materials, painting, dimensions, sampling, and marking.

2. Paint Specifications (Clause 2.4, Table 1)

• *White paint: Ready mixed, semi-gloss, interior
• +Red paint: Semi-gloss, Indian Standard colours
• §Black paint: Semi-gloss, ready mixed

3. Sampling & Conformity (Clause 8.2, Table 2)

• Criterion: Lot passes if defective buckets ≤ permissible number.

4. Marking (Clause 5.3.1)

• The word "FIRE" painted in black on the outside.
• Letter height: 75 mm
• Letter thickness: 12 mm

This summary ensures compliance with IS 2546 for fire buckets regarding materials, painting, sampling, and marking.

IS 2546: Key Material Specifications for Fire Buckets

1. Paints (Clause 2.4 & Table 1)

• *IS 641: Ready mixed white paint, brushing, semi-gloss, interior use.
• +IS 2932: Ready mixed semi-gloss enamel paint.
• §IS 128: Ready mixed black paint, brushing, semi-gloss.

2. Mild Steel Materials

• Body Sheet: Mild steel black sheets, Grade St 34 or St 42 as per IS 1079:1968.
• Handles: Mild steel rods conforming to IS 226:1969.
• Wiring: Mild steel wire for beading as per IS standards.

3. Dimensions & Fabrication (Clause 4.1)

• Body thickness: 1 mm.
• Beading wire diameter: 3.55 mm.
• Construction: Two halves joined by butt welding; top rim wired and uniformly beaded without gaps.
• Handles: 10 mm diameter rod, free to lie along bucket edge.

flowchart LR
    A[Body: 1 mm thick steel sheet] --> B[Two halves butt welded]
    B --> C[Top rim wired & beaded (3.55 mm wire)]
    C --> D[Handles: 10 mm dia mild steel rods]
    D --> E[Paint: Inside white, Outside red, Handles black]

Summary: Use specified IS paints for durability and visibility. Steel grades and thickness ensure strength. Welding and beading details maintain structural integrity.

IS 2546: Fire Bucket - Shape and Essential Dimensions

Key Specifications:

• Body Thickness: 1.00 mm thick sheet steel (Clause 1.00, 4.1)
• Body Construction: Two halves joined by butt welding (Clause 4.1)
• Top Rim: Wired and uniformly beaded with 3.55 mm diameter wire; beading fully formed without gaps (Clause 4.1)
• Handle: Free to move and lie along the edge of the bucket (Clause 4.1)
• Stop Pieces: 2 pieces, 10 mm diameter, welded (Fig. 1 detail)

Paint Specifications (Clause 2.4, Table 1):

* White paint for interior semi-gloss

• Semi-gloss enamel paint
  § Black paint for general purposes

Summary Diagram (Bucket Cross-Section):

graph TD
    A[Body: 1 mm thick sheet] --> B[Two halves joined by butt welding]
    B --> C[Top rim wired & beaded (3.55 mm wire)]
    C --> D[Handle free to lie along edge]
    A --> E[Stop pieces: 2 pcs, 10 mm dia welded]

This ensures compliance with IS 2546 for fire bucket shape, dimensions, and finishes. For exact dimensions, refer to Fig. 1 in the standard.

IS 2546: Manufacture and Construction of Galvanized Mild Steel Fire Buckets

Key Specifications:

• Body Construction (Clause 4.1):

  • Made of two halves joined by butt welding.
  • Top rim: wired and uniformly beaded.
  • Beading wire diameter: 3.55 mm.
  • Body sheet thickness: 1 mm.
  • Handle: Free, lies along bucket edge; welded with 10 mm diameter stop pieces.

• Paints for Fire Buckets (Clause 2.4, Table 1):

Quality Control:

• Criterion for Conformity (Clause 8.4):
  • Lot accepted if defective buckets ≤ limits in Table 2 (not provided here).
  • Ensures consistent manufacturing quality.

Summary Diagram: Fire Bucket Assembly

graph TD
  A[Body Half 1] -->|Butt Weld| B[Body Half 2]
  B --> C[Top Rim Beading (3.55 mm wire)]
  C --> D[Handle (Free, welded with 10 mm stop pieces)]
  D --> E[Paint: Inside White, Outside Red, Handles Black]

This standard ensures fire buckets are robust, properly coated, and conform to dimensional and quality requirements for effective firefighting use.

IS 2546: Finish Specifications for Fire Buckets

Clause 2.4 - Paints:

• IS 641-1964: Ready mixed white paint, semi-gloss, interior.
• IS 120-1962: Ready mixed red paint, semi-gloss.
• IS 2932-1964: Enamel paint for red finish.
• IS 128-1962: Ready mixed black paint, semi-gloss.

Clause 5.3.1 - Lettering:

• The word "FIRE" must be painted centrally on the outside.
• Letter dimensions: 75 mm height, 12 mm thickness.
• Paint color for letters: Black.

Summary:

• Use specified IS paints for inside (white), outside (red), and markings (black).
• Finish must be durable, semi-gloss.
• Markings must be clear and standardized in size.

flowchart TD
    A[Fire Bucket Surface] --> B[Inside: White Paint (IS 641-1964)]
    A --> C[Outside: Red Paint (IS 120-1962 / IS 2932-1964)]
    A --> D[Handles/Ears/Letters: Black Paint (IS 128-1962)]
    D --> E["FIRE" Letters: 75mm height, 12mm thick]

This ensures visibility, durability, and compliance with IS 2546 finish requirements.

IS 2546 - Performance Requirements Summary

1. Marking (Clause 5.3.1)

• The word "FIRE" must be painted black, centrally on the outside.
• Letter size: 75 mm height, 12 mm thickness.

2. Paint Specifications (Clause 2.4 & Table 1)

Notes:

• IS 641-1964: White interior paint
• IS 120-1962: Red paint
• IS 2932-1964: Red enamel paint
• IS 128-1962: Black paint

3. Sampling & Conformity (Clause 8.2 & 8.4, Table 2)

• Conformity Criterion: Lot passes if defective buckets ≤ permissible number.

Summary Diagram

flowchart TD
    A[Fire Bucket] --> B[Paint: Inside White (IS 641)]
    A --> C[Paint: Outside Red (IS 120 / IS 2932)]
    A --> D[Paint: Handles

IS 2546: Inspection & Manufacturer's Certificate - Key Points

1. Inspection (Clause 7.1)

• Purchaser's right: The purchaser or their representative may inspect finished fire buckets at the manufacturer's works before dispatch.
• Purpose: Ensures compliance with specifications and quality.

2. Manufacturer's Certificate

• Must accompany the delivery, certifying conformity to IS 2546 requirements.

3. Air Bubble Test (Clause 6.1.2.1)

• Test: Submerge bucket top-down in water without agitation.
• Pass criteria: No air bubbles should escape.
• Failure: Presence of air bubbles indicates leakage.

4. Paint Specifications (Clause 2.4 and Table 1)

* White paint for interior semi-gloss

• Semi-gloss enamel for general purposes
  § Black paint semi-gloss for general purposes

5. Criterion for Conformity (Clause 8.4)

• Lot acceptance based on maximum allowable defective buckets per Table 2.
• If defects exceed limit → Lot rejected.

Summary Diagram: Inspection & Conformity Flow

flowchart TD
    A[Manufacture Fire Buckets] --> B[Air Bubble Test]
    B -->|Pass| C[Paint Application as per IS 2546]
    B -->|Fail| D[Reject Bucket]
    C --> E[Inspection by Purchaser]
    E -->|Accept| F[Manufacturer's Certificate Issued]
    E -->|Reject| D
    F --> G[Dispatch]

Use this checklist to ensure compliance with IS 2546 during manufacturing and inspection.

IS 2546: Scale of Sampling and Criterion for Conformity

Sampling Plan (Clause 8.2)

• Select buckets randomly from at least 10% of packages, minimum 3 packages.
• Equal number of buckets from each package.
• If packages < 3, select buckets from all.

Table 2: Sample Size & Permissible Defects

Criterion for Conformity (Clause 8.4)

• Accept lot if defective buckets ≤ permissible number.
• Reject lot if defective buckets exceed permissible number.

Notes

• Sampling plan targets ≤ 2.5% defective acceptance.
• Inspection can be done at manufacturer's works (Clause 7.1).

This ensures quality control by balancing inspection effort and defect tolerance.

IS 2546: Marking and Packing Key Points

1. Sampling & Conformity (Clauses 8.2 & 8.4)

• Sample Size & Defect Limits depend on lot size (Table 2):

• Buckets are selected randomly from at least 10% of packages (minimum 3 packages).

2. Marking (Clause 9.1)

• Each bucket must be stamped/embossed on the side with:
  • Manufacturer's name/trademark
  • Year of manufacture
  • Capacity
• Embossing depth must ensure legibility after galvanizing.

3. Painting (Clause 2.4, Table 1)

• Paints must conform to IS standards:

This ensures quality, durability, and traceability of fire buckets per IS 2546.