What is the mandatory hydrostatic test pressure for this branch pipe?

It must withstand a hydrostatic pressure of 2.1 MN/m² (or 21 kgf/cm²) for 2.5 minutes without any leakage or structural failure (Clause 6.1).

What are the approved materials for the body of the branch pipe?

The body can be made from either Leaded Tin Bronze (Gunmetal) conforming to IS 318 or Aluminium Alloy conforming to IS 617 (Clause 3.2).

What is the standard inlet connection for this branch pipe?

It must have a 63 mm female instantaneous type coupling that conforms to the requirements of IS 903 (Clause 4.3).

What is the purpose of the extended design?

The extended design (600 mm length) is intended to provide a better and safer grip for the firefighter operating the branch, improving control and accuracy of the water stream.

IS 11101

: 1984

Extended Branch Pipe for Fire Brigade Use

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This standard specifies the requirements for materials, dimensions, construction, workmanship, and performance of extended branch pipes used by fire brigades. It ensures the equipment is robust, reliable, and compatible with standard fire hoses and nozzles.

Extended Branch Pipe for Fire Brigade Use

Quick Reference Values

Hydrostatic test pressure2.1 MN/m² (21 kgf/cm²) for 2.5 minutes

Standard inlet connection size63 mm female instantaneous coupling

Nominal nozzle bore diameter25 mm

Overall length (excluding nozzle)600 mm ± 10 mm

Material for body (option 1)Aluminium alloy as per IS 617 Grade 4600

Material for body (option 2)Leaded tin bronze as per IS 318 Grade LTB2

Practical Notes

The extended length provides firefighters better reach and control over the water jet compared to standard short branch pipes.

Ensure compatibility with 63 mm instantaneous fire hose couplings as per IS 903, which is the standard in India.

Periodically check the rubber washer at the inlet connection for wear and tear to prevent leakage under high pressure.