What is the standard hydraulic test pressure for these collecting heads?

They must be tested at a hydraulic pressure of 2.1 MPa (21 kgf/cm2) for at least 2.5 minutes without showing signs of leakage or sweating.

Are vacuum tests mandatory for suction collecting heads?

Yes, because they are used on the suction side of the pump, they must withstand a vacuum of not less than 700 mm of mercury to ensure reliable drafting capability.

What type of couplings are used with these heads?

They typically interface with standard instantaneous fire couplings conforming to IS 901 and suction hose couplings conforming to IS 902.

IS 903

: 1993

Specification for 2-Way And 3-Way Suction Collecting Heads For Fire Fighting Purposes

CurrentSpecializedSpecificationFire Safety · Fire Fighting

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This standard lays down the requirements regarding materials, shape, dimensions, and testing for 2-way and 3-way suction collecting heads used to feed fire pumps from multiple water sources. It is primarily used by fire equipment manufacturers and fire safety engineers for specification and quality control.

Specification for 2-Way And 3-Way Suction Collecting Heads For Fire Fighting Purposes

Quick Reference Values

Hydraulic test pressure2.1 MN/m2 (21 kgf/cm2)

Duration of hydraulic test2.5 minutes

Vacuum test requirementNot less than 700 mm of Hg

Practical Notes

Always ensure the collecting head passes both the positive hydraulic pressure test and the vacuum test to prevent air lock or collapse during suction drafting operations.

For coastal, marine, or corrosive environments, gunmetal or stainless steel variants should be specified over aluminum alloys to ensure longevity.