Specification for Revolving Branch Pipe For Fire Fighting

IS 906: Scope Summary & Key Specifications

• Scope: Covers copper alloy castings/forgings for specific engineering applications (Clause 3.1).
• Material Standards:
  • Sand Grade LTB 2 per IS 318-1981
  • Castings Grade HTB 1 per IS 304-1981
• Dimensional Tolerances: ±0.5 mm unless otherwise specified (Clause 4.1).
• Nozzle Orientation:
  • Nozzles A, B, C: On circumference, inclined 60° to tangent
  • Nozzles D, E, F: Upper half, 45° to vertical upwards
  • Nozzles G, H, J: Lower half, 45° to vertical downwards (Clause 4.1)
• Rounding off: Final test/analysis values rounded per IS 2-1960 maintaining significant figures (Clause 0.3).
• Conformity: Each branch must meet all standard requirements (Clause 8.1).

Important Notes:

Typical Nozzle Orientation Diagram (Simplified):

circleDiagram
    title Nozzle Orientation (IS 906)
    circle
    A((A)):::nozzleA
    B((B)):::nozzleA
    C((C)):::nozzleA
    D((D)):::nozzleD
    E((E)):::nozzleD
    F((F)):::nozzleD
    G((G)):::nozzleG
    H((H)):::nozzleG
    J((J)):::nozzleG

    classDef nozzleA fill:#f96,stroke:#333,stroke-width:2px;
    classDef nozzleD fill:#69f,stroke:#333,stroke-width:2px;
    classDef nozzleG fill:#6f9,stroke:#333,stroke-width:2px;

For detailed dimensions, refer to Fig. 1 in IS

IS 906: Key Material Specifications & References

1. Copper Alloys (Clause 3.1)

• Sand Grade: LTB 2 per IS 318:1981 (Loaded Tin Bronze ingots & castings)
• Castings Grade: HTB 1 per IS 304:1981 (High Tensile Brass ingots & castings)
• Other referenced IS codes for copper alloys include:
  • Loaded Brass ingots & castings
  • Naval Brass rods & sections
  • Brass gravity die castings, ingots & castings

2. Aluminium Alloys (Clause 3.2)

• Aluminium castings must conform to IS designations:
  • IS 4450, 4225, 4600 of IS 617:1975

3. General Notes

• Material properties and test results are to be rounded off as per IS 2:1960.
• Steel for balls, rollers, and bearing races follows carbon-chromium steel specs (first revision).

Summary Table of Material Standards

This ensures compliance with mechanical and chemical properties for castings and forgings in IS 906.

IS 906: Components and Construction - Key Points

1. Materials (Clause 3.1)

• Copper Alloys for castings/forgings must conform to:
  • Sand Grade LTB 2 (IS:318-1981) — Loaded Tin Bronze
  • Castings Grade HTB 1 (IS:304-1981) — High Tensile Brass
• Other referenced specs include:
  • Brass ingots, naval brass rods, aluminium alloys, carbon-chromium steel for bearing components.

2. Dimensions and Construction (Clause 4.1)

• General shape & dimensions: As per Fig. 1 (not provided here).
• Tolerance: ± 0.5 mm unless otherwise specified.
• Nozzle Orientation:
  • Nozzles A, B, C: On circumference, inclined 60° to tangent.
  • Nozzles D, E, F: Upper half center, inclined 45° to vertical (pointing upwards).
  • Nozzles G, H, J: Lower half center, inclined 45° to vertical (pointing downwards).

3. Finish and Quality (Clause 5.1)

• All parts must be smooth, burr-free.
• Castings must be clean, sound, free from plugging, welding, or repairs.

Summary Table: Nozzle Orientation

If you need specific dimensional data or performance test methods, please refer to the full IS 906 document or Ministry of Defence guidelines.

IS 906: Dimensions and Shape of Revolving Branch Pipe

Key Specifications (Clause 4.1)

• General shape & principal dimensions: As per Fig. 1 (Revolving Branch Pipe).
• Tolerance: ± 0.5 mm unless otherwise specified.
• Nozzle orientation:
  • Nozzles A, B, C: On circumference, inclined 60° to tangent of circular plane.
  • Nozzles D, E, F: Center of upper half, inclined 45° to vertical (pointing upwards).
  • Nozzles G, H, J: Lower half, inclined 45° to vertical (pointing downwards).

Material Specifications (Clause 3.1)

• Copper alloys must conform to:
  • IS 318-1981 (Sand Grade LTB 2)
  • IS 304-1981 (Castings Grade HTB 1)
• Other alloys and steels as per related IS standards for castings and forgings.

Marking Requirements (Clause 7.1)

• Manufacturer's name/trade mark
• Year of manufacture
• Material type

Summary Table: Nozzle Orientation

Diagram: Nozzle Orientation Concept

circle
  title Revolving Branch Pipe Nozzle Layout
  A((A)) -->|60°| Circumference
  B((B)) -->|60°| Circumference
  C((C)) -->|60°| Circumference
  D((D)) -->|45° Up| Upper half center
  E((E)) -->|45° Up| Upper half center
  F((F)) -->|45° Up| Upper half center
  G((G)) -->|45° Down| Lower half center
  H((H)) -->|45° Down| Lower half center
  J((J)) -->|45

IS 906: Finish and Workmanship - Key Points

1. Finish Requirements (Clause 5.1)

• All parts must have a good finish, free from burrs and sharp edges.
• Castings must be clean, sound, and free from:
  • Plugging
  • Welding
  • Repairs of defects

2. Material Specifications (Clause 3.1)

• Copper alloys for castings/forgings should conform to:
  • Sand Grade LTB 2 (IS 318-1981)
  • Castings Grade HTB 1 (IS 304-1981)
• These ensure proper mechanical and chemical properties.

3. Rounding Off Test Values (Clause 0.3)

• Use IS 2-1960 for rounding test results.
• Retain the same number of significant digits as specified in the standard.

Summary Table for Finish & Workmanship

flowchart TD
    A[Start: Casting/Forging] --> B{Check Surface Finish}
    B -- Burrs/Sharp Edges? -->|Yes| C[Reject/Repair]
    B -- No --> D{Castings Clean & Sound?}
    D -- No --> C
    D -- Yes --> E[Material Spec: IS 318 / IS 304]
    E --> F[Perform Tests & Round per IS 2-1960]
    F --> G[Compliant Product]

This ensures compliance with IS 906 for finish and workmanship quality.

IS 906: Performance Requirements Summary

• Material & Finish (Clause 5.1):

  • All parts must have a good finish, free from burrs and sharp edges.
  • Castings must be clean, sound, and free from plugging, welding, or repairs.

• Performance Testing:

  • Tests and material specifications align with Ministry of Defence standards and should be factory-conductible.
  • Final test values must be rounded as per IS 2:1960, maintaining the same significant figures as the specified values.

• Dimensional Tolerances (Clause 4.1):

  • General dimensions per Fig. 1 (not provided here).
  • Tolerance: ±0.5 mm unless otherwise specified.
  • Nozzle orientations:
    • A, B, C: on circumference, inclined 60° to tangent.
    • D, E, F: upper half, inclined 45° upwards to vertical.
    • G, H, J: lower half, inclined 45° downwards to vertical.

Rounding Off (IS 2:1960) Key Point:

• Round final values to the same decimal places as the specified standard values.

Nozzle Orientation Diagram (Conceptual):

circle
    title Nozzle Orientation on Revolving Plane
    A & B & C: on circumference, 60° to tangent
    D & E & F: upper half, 45° upwards
    G & H & J: lower half, 45° downwards

For detailed dimensions, refer to Fig. 1 of IS 906.

IS 906: Marking Requirements Summary

Key Marking Specifications (Clause 7.1)

Each revolving branch pipe must be clearly and permanently marked with:

• Manufacturer's name or trade mark
• Year of manufacture
• Type of material

Standard Mark (Clause 7.1.1)

• The product may bear the BIS Standard Mark, indicating compliance with IS 906.
• Use of the Standard Mark is governed by the BIS Act 1986 and requires a license.
• It assures production under a system of inspection, testing, and quality control supervised by BIS.

Rounding Off (Clause 0.3)

• Final test or analysis values must be rounded as per IS 2:1960.
• The number of significant digits retained should match the specified value in the standard.

Additional Notes:

• Marking must be permanent and legible to ensure traceability.
• Standard Mark usage implies ongoing BIS surveillance for conformity.

flowchart LR
    A[Revolving Branch Pipe] --> B{Marking}
    B --> C[Manufacturer's Name/Trademark]
    B --> D[Year of Manufacture]
    B --> E[Type of Material]
    B --> F[BIS Standard Mark (optional)]

This ensures traceability, quality assurance, and compliance with IS 906.

IS 906: Criteria of Conformity - Key Points

• Clause 8.1: Each branch of the equipment must conform strictly to the requirements of IS 906.
• Conformity Assurance: Products bearing the BIS Standard Mark ensure compliance with IS 906 through:
  • Inspection
  • Testing
  • Quality control supervised by BIS
• Rounding Off Results: As per Clause 0.3, test results should be rounded off following IS 2:1960 rules, retaining the same significant figures as specified values.
• Quality Requirements:
  • All parts must have a good finish, free from burrs and sharp edges (Clause 5.1).
  • Castings should be clean, sound, and free from defects like plugging or repairs.

For detailed licensing and use of Standard Mark, contact BIS offices listed in the standard.

flowchart TD
    A[Manufacturing] --> B[Inspection & Testing]
    B --> C{Conforms to IS 906?}
    C -->|Yes| D[Apply BIS Standard Mark]
    C -->|No| E[Reject or Rework]
    D --> F[Marketed as BIS Certified Product]

This ensures quality and safety compliance per IS 906.