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Pipe freezing is method to freeze the content of a section of pipe by applying cryogenic (i.e. very low temperature) freezing agent in a controlled manner. when the ice plugs are formed maturely, maintenance works to the pipe can be carried out between the ice plug without draining massive amount of pipe fluid.

This technique has been used on cross-country pipeline, process plants and pipelines containing water, sewage and a wide range of oils and other fluids.

When it is needed?

You are often faced with the following problems during alteration  works:
Perform maintenance and repair works on pipelines with non-functional valves.
Repair works on leaking pipelines.
Replacing valves or flanges in pipelines with no zone valves.
Insertion of branch in pipelines with no zone valves.
Pipe freezing  Process
Preparation Works           Pipe Freezing Process        Pipe  Alteration Works                Hot Works

We provide pipe freezing service with the following advantages:

We are capable of providing pipe freezing service for
Convenient - No need for massive draining of fluid
Flexible - No need to shut system down
Time Saving - Shorten system downtime
Money Saving - Minimize labour required and loss of fluid / resources
Hassle Free - No need to purge air or refill fluid after work is completed
Reliable - Certainty in project time
Quick - No extra workload
At Alstern Technologies, our certified technicians will provide on-site solutions with efficiency and safety as their priority. These services are executed in line with our company’s objective to instil confidence that Alstern Technologies delivers cost effective solution to our customers’ piping system requirements.
Freezing of horizontal, vertical and inclined pipes
Freezing of chilled water, condenser water, sea water
Freezing of oil-based, hydrocarbon-based fluid and sludge
Freezing of fluid with glycol (anti-freeze) and most chemicals
Freezing of leaking pipes
Freezing of metal, cement-lining, PVC and other plastic pipes
Freezing of pipe diameters up to 48"
At Alstern Technologies, we believe in providing on-site pipeline solutions efficiently and safely. Our certified technicians will deliver cost effective solutions to our customer’s piping system requirements. In addition to the pipeline services, Alstern Technologies also provides turnkey service operations and tie-in projects.
(A Member of Alstern Technologies Group)