Dividing Breeching with Control for Fire Brigade Use -Specification

IS 5131: Scope and Key Specifications

• Scope:
  IS 5131 covers the dimensions, materials, and requirements for dividing breechings used in fire protection systems.

• Units:
  All dimensions are expressed in millimetres (mm) (Clause 11.30).

• Rounding Off:
  Final values from tests or calculations must be rounded as per IS 2:1960, retaining the same number of significant digits as the specified value.

• Key Components:

  • Dividing Breeching with Control: Details as per Fig. 1 (includes threaded G22 minimum 12 mm length as per IS 2643).
  • Female Outlet: As per IS 5290.
  • Male Inlet: As per IS 903.

• Conformity Checks:
  Each fitting must be checked against the standard's requirements (Clause 9).

• References:
  Annex A lists Indian Standards referenced, which should be the latest editions.

Summary Table of Dimensions (Example from Fig. 1 & 2)

flowchart LR
  A[Dividing Breeching] --> B[Threaded G22 (IS 2643)]
  A --> C[Female Outlet (IS 5290)]
  A --> D[Male Inlet (IS 903)]

For detailed dimensions, refer to IS 5131 figures and tables directly.

IS 5131: Key References and Specifications Summary

• Referenced Standards:

  • IS 2:1960 — Rules for rounding off numerical values
  • IS 2643 — Thread specifications (e.g., THD. G 22 min.)
  • IS 5290 — Female outlet dimensions
  • IS 903 — Male instrument inlet dimensions

• Rounding Off:
  Follow IS 2:1960 for rounding test or calculated values, retaining the same significant figures as specified.

• Dimensions:
  All dimensions are in millimetres (Clause 11.30).

• Conformity:
  Each fitting must be checked against the standard’s requirements (Clause 9).

• Figures:

  • Fig. 1: Dividing Breeching with Control (includes threaded connections per IS 2643, IS 5290, IS 903)
  • Fig. 2: Dividing Breeching Type 'B' details

• Revision Notes:
  The 1986 revision updated dimensions, materials, and aligned with related IS standards.

Example: Thread Specification (per IS 2643)

flowchart LR
    A[IS 5131 Standard] --> B[Dimensions in mm]
    A --> C[References]
    C --> D[IS 2:1960 (Rounding)]
    C --> E[IS 2643 (Thread)]
    C --> F[IS 5290 (Female Outlet)]
    C --> G[IS 903 (Male Inlet)]
    A --> H[Conformity Checks]

For detailed dimensions and tables, refer to the respective IS codes annexed in IS 5131.

IS 5131: Terminology & Key Specifications

• Dimensions: All dimensions are in millimetres (mm) as per Clause 11.30.
• Threading:
  • Minimum thread gauge: G 22 min, 12 mm length as per IS 2643.
  • Female outlet conforms to IS 5290.
  • Male instrument inlet as per IS 903.
• Rounding Off: Values are rounded following IS 2:1960 rules, retaining the same number of significant digits as the specified value.
• Conformity: Each fitting must be checked for compliance as per the standard's requirements.
• References: Annex A lists related Indian Standards which are integral to IS 5131 and should be reviewed for the latest editions.

Summary Table: Key Standards Referenced

flowchart TD
    A[IS 5131 Terminology] --> B[Dimensions in mm]
    A --> C[Threading per IS 2643]
    A --> D[Female Outlet per IS 5290]
    A --> E[Male Inlet per IS 903]
    A --> F[Rounding per IS 2:1960]
    A --> G[Conformity Checks]

This ensures standardization and compatibility across fittings and components.

IS 5131 - Materials Specifications Summary

• Stainless Steel:

  • Must conform to IS 6603 (Clause 4.9).
  • Grades as per IS 3444: Grade I or IV for parts like body, revolving sleeves, connectors, and handles (Clause 4.1).

• Bronze:

  • Leaded Tin Bronze, Grade LTB 2 as per IS 318 (Clause 4.1).

• Aluminium Alloy:

  • Designations 4225, 4450, 4600 as per IS 617 (Clause 4.1).

• Rounding Off Values:

  • Follow IS 2:1960 for rounding test/analysis results, retaining the same number of significant figures as specified values.

Key Material Table (Summary)

Notes:

• Always verify the latest editions of referenced IS codes.
• Material selection impacts durability, corrosion resistance, and mechanical performance.

flowchart TD
    A[Materials] --> B[Lead Tin Bronze (IS 318 LTB 2)]
    A --> C[Aluminium Alloy (IS 617)]
    A --> D[Stainless Steel (IS 3444 Grades I/IV)]
    A --> E[Stainless Steel (IS 6603)]

IS 5131: Types and Dimensions of Dividing Breeching

Types (Clause 5.1)

• Type A: Bush design (see Fig. 1 or Fig. 2)
• Type B: Ball design (see Fig. 2)

Key Specifications

• Made of stainless steel as per IS 6603 (Clause 4.9)
• All dimensions are in millimetres (Clause 11.30)
• Central chamber: hollow cylinder with removable top, smooth internal surface
• Inlet at one end; two outlets at the other, outlets axes at 45º to inlet axis
• Revolving sleeves: hollow, fit closely in the central chamber, covered on top, pass through gland

Dimensional Highlights (from Fig. 1 & 2)

• Thread: G 22 min. 12 mm LG as per IS 2643
• Female outlet: as per IS 5290
• Male inlet: as per IS 903

Summary Diagram of Type A (Bush Design)

flowchart LR
    A[Inlet] -->|Axis| B[Central Chamber (Hollow Cylinder)]
    B -->|45º| C[Outlet 1]
    B -->|45º| D[Outlet 2]
    B --> E[Revolving Sleeves]
    E --> F[Gland on top]

This standard ensures dimensional compatibility and performance conformity for dividing breeching fittings.

IS 5131: Construction Details for Dividing Breeching with Control

• Dimensions: All in millimetres (Clause 11.30).
• Material: Stainless steel as per IS 6603 (Clause 4.9).
• Threading:
  • Female outlet: IS 5290
  • Male inlet: IS 903
  • Thread size: G 22 min., 12 mm length as per IS 2643
• Hydraulic Test:
  • Pressure: 2.1 MN/m² (21 kgf/cm²)
  • Duration: 150 seconds
  • Condition: Both outlets closed, no leakage (Clause 2.1)
• Workmanship:
  • Free from burrs, sharp edges, plugging, welding, or repaired defects (Clause 8)

Key Specifications Table

flowchart LR
    A[Dividing Breeching] --> B[Male Inlet (IS 903)]
    A --> C[Female Outlet (IS 5290)]
    B --> D[Thread G 22, 12 mm length (IS 2643)]
    C --> D
    A --> E[Hydraulic Test: 2.1 MN/m², 150s, No Leakage]
    A --> F[Material: Stainless Steel (IS 6603)]

This ensures compliance with IS 5131 for fire brigade dividing breeching units.

IS 5131: Performance Requirements Summary

Performance Requirements per IS 5131 focus on:

• Dimensional Accuracy:

  • All dimensions in mm (Clause 11.30).
  • Typical shapes & essential dimensions as per Fig. 1 (Type A) and Fig. 2 (Type B).

• Construction Details:

  • Central chamber: hollow cylinder with removable top, smooth internal surface.
  • Inlet at one end; two outlets at other end, outlets at 45º to inlet axis.
  • Revolving sleeves fit closely, covered on top, passing through gland.

• Testing & Compliance:

  • Results rounded off as per IS 2:1960 rules.
  • Each fitting checked for material, workmanship, finish, and performance.

Key Specifications:

Rounding off values (IS 2:1960)

• Round off final test values to the same number of significant digits as specified in the standard.

flowchart LR
    A[Inlet] --> B[Central Chamber]
    B -->|Two outlets at 45º| C1[Outlet 1]
    B -->|Two outlets at 45º| C2[Outlet 2]
    B --> D[Revolving Sleeves]
    D --> B

For detailed dimensions, refer to Fig. 1 and Fig. 2 in IS 5131.

IS 5131: Workmanship and Finish Key Points

• Hydraulic Test (Clause 2.1):

  • Pressure: 2.1 MN/mm² (21 kgf/cm²)
  • Duration: 150 seconds
  • Condition: Both outlets closed, no leakage allowed through outlets, gland, or casting.

• Workmanship (Clause 8):

  • Parts must be free from burrs, sharp edges.
  • Castings must be clean, sound, without plugging, welding, or repairs.

• Thread Specifications:

  • Female outlet threads: G 22, minimum 12 mm length (IS 2643).
  • Female outlet as per IS 5290.
  • Male inlet as per IS 903.

• Rounding Off (Clause None):

  • Follow IS 2:1960 for rounding numerical values, matching significant figures to specified values.

• Material (Clause 4.9):

  • Stainless steel conforming to IS 6603.

Summary Table: Hydraulic Test Parameters

Thread Details (per IS 2643 & IS 5290)

flowchart TD
    A[Assembled Unit] -->|Hydraulic Test 2.1 MN/mm²| B[No Leakage]
    B --> C[Check Outlets, Gland, Casting]
    A --> D[Visual Inspection]
    D --> E[No Burrs, Sharp Edges]
    D --> F[Castings Clean & Sound]
    A --> G[Threads Check]
    G --> H[Female Outlet G22, 12mm length]
    G --> I[Male Inlet IS 903]

This ensures compliance with IS 5131 workmanship and finish

IS 5131 - Criteria for Conformity: Key Points

• Dimensions: All dimensions are in millimetres (Clause 11.30).

• Rounding Off: Final test or calculation values must be rounded per IS 2:1960 rules, retaining the same significant figures as the specified values.

• Referenced Standards: Compliance includes meeting provisions of referenced IS codes, e.g.:

  • IS 2643 (Thread dimensions)
  • IS 5290 (Female outlet)
  • IS 903 (Male inlet)
  • IS 937 (General conformity for fittings, Clause 4.5)

• Testing: Each fitting must be checked against the standard's requirements (Clause 9).

Rounding Off (IS 2:1960) Summary

Typical Dimensioning (from Fig.1 & Fig.2)

• Thread: G 22 min, 12 mm LG as per IS 2643
• Female outlet: per IS 5290
• Male inlet: per IS 903

flowchart LR
    A[Test/Analysis Result] --> B{Round Off per IS 2:1960}
    B --> C[Retain same significant figures]
    C --> D[Compare with Specified Value]
    D --> E{Meets Criteria?}
    E -->|Yes| F[Conforms to IS 5131]
    E -->|No| G[Reject/Retest]

Summary: Conformity requires dimensional accuracy (mm), proper rounding, and compliance with referenced IS codes for threads and fittings.

IS 5131: Marking and Certification Key Points

Clause 10.1: Marking Requirements

• Each fitting must be permanently marked with:
  • Manufacturer's name or trade-mark
  • Year of manufacture

Clause 10.2: BIS Certification Marking

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

Important Notes:

• Rounding off of test results follows IS 2:1960 rules, matching significant digits to the standard's specified values.
• Refer to the list of related IS codes for materials and components specifications (e.g., IS 318, IS 2062, IS 903).

Summary Table: Marking Details

This ensures traceability, quality assurance, and compliance with Indian standards for fire-fighting fittings.

IS 5131: List of Referenced Indian Standards

This standard references multiple Indian Standards (IS) relevant to fire fighting equipment materials and components. Key referenced IS include:

Important Notes:

• These referenced standards govern materials, dimensions, tolerances, and specifications for fire fighting components.
• Always verify the latest editions of these IS as standards are subject to revision.
• Certification and use of the BIS Standard Mark follow the Bureau of Indian Standards Act, 1986 (Clause 10.2.1).

Summary Diagram of Reference Linkage

graph LR
A[IS 5131] --> B[Materials: IS 318, IS 617, IS 2062]
A --> C[Components: IS 903, IS 937, IS 5290]
A --> D[Threads & Wire: IS 2643, IS 6528, IS 7608]
B --> E[Bronze, Aluminium, Steel]
C --> F[Couplings, Nozzles, Washers, Valves]
D --> G[Pipe Threads, Stainless Steel Wire]

This structure helps in understanding the scope of referenced IS for fire fighting equipment design and manufacture.

IS 5131: Committee Composition Summary

Committee: Fire Fighting Sectional Committee, CED 22
Details: Given in Annex B (Foreword) of IS 5131

Key Specifications for Committee Composition:

Full list includes government bodies, research institutes, fire services, industries, and personal experts.

Additional Notes:

• Committee members represent diverse stakeholders ensuring comprehensive standard formulation.
• No direct formulas or tables for committee composition; refer Annex B for full member list.
• Related standards referenced for materials (e.g., stainless steel per IS 6603).

graph TD
    A[IS 5131 Committee] --> B[Ministry of Home Affairs]
    A --> C[Airport Authority of India]
    A --> D[Andhra Pradesh Fire Services]
    A --> E[Bhabha Atomic Research Centre]
    A --> F[Bombay Fire Brigade]
    A --> G[Central Building Research Institute]
    A --> H[Central Industrial Security Force]
    A --> I[Others]

For detailed membership and responsibilities, always refer to Annex B of IS 5131.