Many of the problems associated with Heating and Chilled Water Systems are due to corrosion of pipework and fittings, or to deposits introduced into the systems during the period of construction.

Pre-Commission cleaning 'The Contractors Flush is not enough'

Many of the problems associated with Heating and Chilled Water Systems are due to corrosion of pipework and fittings, or to deposits introduced into the systems during the period of construction.

The Pre-Commission Cleaning operation is designed to remove unwanted contaminants from the pipework installation. If allowed to remain within the system, these contaminants will make the system prone to blockages at strainers, control valves and within small bore heat exchangers. They may also assist in promoting corrosion and microbiological activity within the system.

We normally specify a three stage cleaning operation based on water flush with measured velocities to ensure the complete removal of loose debris, followed by a chemical clean to loosen and dissolve surface oxides. A final flush and passivation will conclude the operation.

There is potential for a chemical clean to do more harm than good if it is not carried out correctly, in particular, the success is dependant upon being able to carry out thorough flushing of the system at all stages of the work. The clean must be carried out as one continuous operation, without any undue delay, this will prevent further corrosion developing.

As the success of the operation relies mainly on the quality of the flushing, and to carry out flushing correctly, valve manipulation is necessary. Unrestricted access to all parts of the system is required throughout the operation.

Pre-connection sterilisation of new mains and domestic water pipework

This is required for all multi occupancy dwellings. It must be carried out in accordance with BS6700. The disinfection of tanks together with hot and cold down services supplies is strongly recommended.

We have the technical expertise and product range to facilitate pre-commisssion cleaning on all types of systems in accordance with CIBSE and BSIRA guidelines.

Please send us your drawings and specifications by email and we will quote you to undertake this work.