For every item that requires blasting and cleaning, there is usually a requirement to apply a protective coating.
Application of specialist coatings or linings will increase the longevity of parts and components, as well as reducing the number of overhauls in the equipment life-span.
Some processes involve high temperatures and extreme chemical or erosive / corrosive conditions – Protective Linings put a barrier between the initial substrate and the process duty. Please speak to our Technical Team at Impact to discuss the correct selection and specification for your specific process.
A heat exchanger is a device that allows heat from a fluid (a liquid or a gas) to pass to a second fluid (another liquid or gas) without the two fluids having to mix together or come into direct contact.
You see heat exchangers in all kinds of places, ie, in power generation, large process facilities, chemical plants, petroleum refineries & marine are just a few examples. A heat exchanger is generally installed to ensure the capture of any wasted energy and divert it back into the process, or recycle it to somewhere useful, such as hot water supply or general heating.
They can also be used the other way round, so used in cooler or chiller situations, such as HVAC systems.
A shell and tube heat exchanger consists of a series of tubes situated within an outer cylindrical body (or shell), which contain fluid that must be either heated or cooled. A second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required.
Typically the ends of each tube are connected to plenums (or otherwise called water boxes) through holes in tubesheets.
Unfortunately, heat exchangers are prone to corrosion and erosion if not closely monitored and maintained, due to their constant contact with fluids, high pressure and temperatures.
Fluid velocity or turbulance causes erosion within the water boxes and on tube sheet surfaces.
If corrosion is already present on the water boxes or tube sheet, the erosion is substantially accelerated, leaving large pitted areas of metal loss which destroys dividers and seal faces, creating pressure and fluid leaks.
Grade 2 IMPACT were called by one of our marine clients to see if we could repair and protect a set of their shell and tube water boxes suffering corrosion/erosion.
In this instance the items were transported from the vessel to our workshop facility, where they could be carefully re-built and protected using ceramic composite materials.
The client was extremely satisfied with the repair, saved huge costs of new purchase and extended downtime due to lead times from the supplier.
The repair offered outstanding duty protection from corrosion/erosion for years to come.
A heat exchanger is a device that allows heat from a fluid (a liquid or a gas) to pass to a second fluid (another liquid or gas) without the two fluids having to mix together or come into direct contact.
The two most common kinds of heat exchanger are the shell-and-tube and plate/fin types.
In shell and tube heat exchangers, one fluid flows through a set of metal tubes while the second fluid passes through a sealed shell that surrounds them.
Plate/fin heat exchangers have lots of thin metal plates or fins with a large surface area (because that exchanges more heat quicker); heat exchangers in gas furnaces (gas boilers) work this way.
You see heat exchangers in all kinds of places, ie, in power generation, large process facilities, chemical plants, petroleum refineries & marine are just a few examples. A heat exchanger is generally installed to ensure the capture of any wasted energy and divert it back into the process, or recycle it to somewhere useful, such as hot water supply or general heating.
Unfortunately, heat exchangers are prone to corrosion and erosion if not closely monitored and maintained, due to their constant contact with fluids. Plus excess fluid velocity or turbulance causes erosion as metal wears from the tube sheet surfaces near to the tube entrances.
If corrosion is already present on the tube sheet, the erosion is substantially accelerated, leaving large pitted areas which can undermine the tubes, destroy dividers and seal faces, creating extended downtime and large replacement costs.
Grade 2 IMPACT were called by one of our marine clients to see if we could repair and protect one of their shell and tube seawater heat exchangers suffering tube sheet corrosion/erosion.
In this instance the ship only had limited dry dock time, so we had to carefully plan the repair over 24/7 shifts to ensure downtime was minimised and works were completed prior to leaving date.
The client was extremely satisfied with the repair, which was completed ahead of expectation, saved massive costs of new purchase and engineering replacement, plus offers outstanding duty protection from corrosion/erosion for years to come.
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