What is the standard connection type specified in IS 905?

63 mm instantaneous pattern (male and female connections).

What is the required hydraulic test pressure for these breechings?

The assembly must withstand a hydrostatic pressure of 2.1 MPa (21 kgf/cm²) for 2.5 minutes without showing signs of leakage or sweating.

What materials are typically approved for these breechings?

They are generally cast from aluminum alloys, leaded tin bronze, or specific grades of brass depending on the required corrosion resistance and weight.

IS 905

: 1980

Specification for Delivery Breechings, Dividing And Collecting Instantaneous Pattern For Fire Fighting Purposes

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This code specifies the requirements for materials, dimensions, and testing of dividing and collecting delivery breechings with instantaneous pattern connections used in fire fighting. Fire protection engineers and safety officers use this standard for the procurement and quality inspection of fire hose fittings.

Specification for Delivery Breechings, Dividing And Collecting Instantaneous Pattern For Fire Fighting Purposes

Quick Reference Values

standard connection size63 mm instantaneous pattern

hydrostatic test pressure2.1 MPa (21 kgf/cm²)

test duration2.5 minutes

Practical Notes

Dividing breechings divide a single water feed into two lines (1 male inlet to 2 female outlets), while collecting breechings merge two lines into one (2 male inlets to 1 female outlet).

Ensure the instantaneous connections (typically 63mm) strictly comply with IS 901 to guarantee compatibility with standard fire hoses and hydrants.

This specific code covers breechings without control valves. For breechings with control valves, refer to IS 5131.