Category: Corrosion

Posted on by

Case Study: Pipe Capping of Decommissioned Underground Drainage System at Landfill Site

A pipe stub undergoes encapsulation at a landfill site in Cardiff after capping

Limiting leachate from landfill – a pipe stub undergoes encapsulation to further reinforce it after capping

A landfill site in Wales encapsulates a pipe stub and flange plate after capping to protect it against corrosion and a potential future failure, ensuring a decommissioned drainage system could not release toxic leachate into the environment.

Case Study Data

Site
Landfill site
Location
South Wales
Repair Type
Encapsulation of pipe stub
Defect
Reinforcement of stub and flange plate after pipe capping

Products Used

Liquid Metal Epoxy Coating
Brushable epoxy coated onto pipes and structures to create a metallic surface which protects the original metalwork from corrosion

SylWrap HD Pipe Repair Bandage
Composite repair wrap with a water activated resin which sets in minutes to form a rock hard protective shell

Case Study PDF

Download

Case Study Details

A series of underground drainage pumps were found to not be working at the landfill site in South Wales. Drainage is vital on landfill as it is important that rainwater does not flood, gather or pool on the site unchecked to mix with other fluids, which will often be toxic.

Rainwater that does mix with landfill to dissolve environmentally harmful substances is known as leachate. Leachate must be collected and managed properly. If it is allowed to escape into soil, groundwater or surface water, it can have an acute and chronic impact on the environment, causing serious pollution.

Rather than carrying out a complicated and expensive repair of the pumps, it was decided to decommission and replace them with an entirely new drainage system. The old system needed all pipes to be capped off at the start of the network as part of the decommissioning process.

To further reinforce after capping, the landfill site wanted to protect and encapsulate the main pipe stub and its flange plate. This would save it from corrosion and a possible failure in the future, which could lead to the release of leachate.

Despite the pipe stub’s location in a difficult to access area, Liquid Metal was successfully applied

The stub was protruding around 300mm from a concrete wall, located towards the bottom of a chamber. There was very little space to manoeuvre within the chamber and various metal structures above the stub made access more difficult still. The flange plate itself had seven bolts and a tap which needed to be tightly sealed around.

Arch Services were appointed by the site to find a solution. Arch are a Sylmasta approved contractor for major projects and after consultation with Sylmasta technicians, a method for reinforcing the pipe stub after capping was formulated.

Liquid Metal Epoxy Coating used to encapsulate a pipe which had undergone capping to prevent the escape of leachate
Liquid Metal created a new corrosion resistant shield for the flange plate and stub

Liquid Metal Epoxy Coating was first used to protect the pipe stub and flange plate. Liquid Metal is a brushable epoxy which cures to form a new metallic surface when painted over pipework and other structures. It offers excellent protection against corrosion and chemicals by acting as an external shield.

Several coatings of Liquid Metal were painted all over the pipe stub and flange plate. Whilst the final coating had gelled but remained a little tacky, the stub was then encapsulated with SylWrap HD Pipe Repair Bandage.

SylWrap applied to a pipe stub for encapsulation after a pipe undergoes capping
The entire stub was encapsulated with SylWrap HD Pipe Repair Bandage to complete the repair

A SYL633HD bandage was used. The resin was activated with water and the bandage wrapped around the stub and smothered over the plate. More water was applied to smooth the wrap, which cured to form a rock-hard, impact resistant covering of the stub.

Arch said after the successful completion of the application: “Given the protruding bolts and cramped application position, this was not a ‘pretty’ repair. But it absolutely did the job!” The site now had full confidence that the capped pipe would not fail in future.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Reinforcement of Heavily Corroded Steel Pipe to Avoid Future Leak Repair

A heavily corroded pipe in Saudi Arabia undergoes repair and reinforcement using epoxy putty

Rebuild after rust – a heavily corroded steel pipe undergoes repair and reinforcement before the line was breached

An industrial site in Saudi Arabia use two stages of the Sylmasta Pipe Refurbishment System to reinforce a 2 metre long section of heavily corroded steel pipe before the line was breached and required a complex leak repair.

Case Study Data

Site
Industrial site
Location
Saudi Arabia
Repair Type
Pipeline reinforcement and protection
Defect
Heavy corrosion to a 600mm section causing a serious weakening of the line

Products Used

Sylmasta AB Original Epoxy Putty
Two part epoxy putty offering excellent protection against corrosion and chemical attack used to rebuild the weakened area

SylWrap CR Pipe Repair Bandage
Composite repair wrap specially formulated to prevent corrosion and strengthen pipes in aggressive environments

Case Study PDF

Download

Case Study Details

The steel pipe was suffering from a 600mm patch of very heavy corrosion to its external surface. It was only a matter of time until the pipe was breached, at which point the site would have been forced to shut off the line whilst either the leak was sealed or a new section was installed.

To avoid this, it was decided to rebuild and strengthen the line before corrosion could eat all the way through the metalwork. The first stage of repair involved rebuilding the area weakened by corrosion, bringing it back up to full specification.

Heavily corroded section of pipe before undergoing repair using the Sylmasta Pipe Refurbishment System
Heavy corrosion to the pipe looked like to breach the line in the near future

Because the corrosion was impacting only a relatively small area of pipe, it was decided to use Sylmasta AB Original Epoxy Putty to fill in the damage and restore the integrity of the line. Had the damage been on a much larger scale, an epoxy paste like Industrial Metal would have been applied using a hand tool.

Sylmasta AB is a super strength putty filled with ceramic to make it harder wearing. A two hour work time means it is more suitable for warmer climates like Saudi Arabia, where the cure is often accelerated by the natural temperature.

AB Original offers excellent protection against corrosion and chemical attack. In chemically aggressive environments, it can be used as a sacrificial layer to protect pipes and metalwork.

Heavily corroded section of steel pipe having undergone repair with Sylmasta AB Original Epoxy Putty
Sylmasta AB was applied across the entire corroded section, restoring the integrity of the line

The two parts of the putty were mixed by hand in equal measures. It was then pushed down onto the pipe, where it cured to strengthen the heavily corroded areas by increasing the thickness of the pipe back towards its original specification.

Once the putty had cured, SylWrap CR Corrosion Protection Wrap was applied over the top to further protect the repair. SylWrap CR is a black-coloured composite repair bandage incorporated with highly effective corrosion inhibitors.

It has been specially formulated to protect pipes, metalwork and other structures in harsh and aggressive environments against corrosion. SylWrap CR was activated with water and then wrapped and smoothed along a 2 metre section of the pipeline.

The pipe was reinforced with SylWrap CR to complete the repair

Within minutes, it began to cure rock hard. Once set, SylWrap CR formed an impact resistant shell around the pipe to further strengthen it from future attack and remove the prospect of a breach in the line.

Completing the repair from the first kneading of Sylmasta AB to the finished application of SylWrap CR took half a day. The line remained in operation throughout, meaning there was no disruption to the site and the reinforcement cost a fraction of a future leak repair or replacement of an entire section of the line.

The site were therefore very pleased that they opted for strengthening the steel pipe before their corrosion problem could develop into a much bigger issue.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Repair & Refurbishment of Corroded 20 Metre Long Porth Pipe Bridge

The repair and refurbishment of a pipe bridge crossing the Rhonda River made using the Sylmasta Pipe Refurbishment System

Troubled bridge over water – the repair and refurbishment of a dilapidated steel pipe bridge crossing the Rhonda River

Sylmasta and Arch Services repair and refurbish a dilapidated 20-metre long pipe bridge crossing the Rhonda River in Porth, South Wales, helping to save Dwr Cymru Welsh Water from an expensive replacement of the heavily corroded structure.

Case Study Data

Site
Pipe bridge
Location
Porth, South Wales
Repair Type
300mm steel pipe bridge repair
Defect
Significant cracking and weakening of line caused by corrosion

Products Used

Liquid Metal Epoxy Coating
Brush applied to coat pipes and structures with an ultra-smooth, hard wearing, metallic surface

SylWrap CR Pipe Repair Bandage
Composite repair wrap specially formulated to prevent corrosion and strengthen pipes in aggressive environments

Case Study

Download

Case Study Details

Sylmasta were contacted by Dwr Cymru Welsh Water for advice on repairing and extending the lifespan of a dilapidated pipe bridge crossing the Rhonda River in Porth, South Wales. The bridge was gravity fed and made up of a 300mm diameter, 20-metre long steel pipe rested inside an angle-iron structure for support and protection.

For such a complex project, it was recommended that the four-stage Sylmasta Pipe Refurbishment System be used as a starting point. A final decision on the repair elements required would be decided once the pipe had been fully inspected.

Dwr Cymru official contractors appointed Arch Services of Porth to carry out the work, and it was agreed that Sylmasta would keep in close communication throughout the project to deal with any questions that might arise.

A heavily corroded pipe bridge prior to undergoing repair by Sylmasta
The steel pipe was covered in corrosion, which had eaten through in places

On inspection, the pipe was discovered to be totally covered in corrosion. This had eaten completely through the steel in several places along the top of the pipe, leaving large holes in the brittle surface.

As these holes were too large or delicate to be repaired with epoxy putty, Arch decided to use fibreglass patches layered over the cracked sections of pipe to seal the leaks. The entire pipe was then coated with Liquid Metal Epoxy Coating.

Liquid Metal is a metal-filled, brushable epoxy. After being coated onto the pipe, it cured to form a smooth, metallic, hard-wearing surface. Several layers of Liquid Metal were used to create an impermeable skin around the original pipe, preventing any further corrosion to the steel and ensuring fluids could no longer escape.

Liquid Metal Epoxy Coating applied to pipe bridge in South Wales to rebuild the corroded outer layer of the pipe
Liquid Metal created an ultra-smooth, hard-wearing metallic surface around the pipe

The 90-minute gel time of Liquid Metal allowed significant amounts of epoxy to be mixed without the threat of premature curing. Arch Services used a roller to apply each coating to a 1mm – 2mm thickness, also painting with Liquid Metal the corroded steel hoops and beams which held the pipe in place.

To further reinforce the pipe and reinstate its integral strength, it was wrapped with four layers of SylWrap CR Corrosion Protection Wrap. SylWrap CR is a composite repair bandage incorporated with highly effective corrosion inhibitors.

SylWrap CR was carefully applied along the length of the pipe, further reinforcing the repair

It has been specially formulated for the prevention of corrosion and the protection and strengthening of pipes, metalwork, and other structures in harsh and aggressive environments.

SylWrap CR was applied to the pipe whilst the final coating of Liquid Metal remained tacky. The resin in SylWrap CR was activated with water and the bandage tightly wrapped and smoothed around the pipe.

SylWrap CR Corrosion Protection Wrap used to reinforce and repair a pipe bridge in Porth, South Wales
The completed repair along the 20 metre length of the pipe

Within minutes, SylWrap CR cured to form a rock-hard, impact resistant shell around the pipe. Arch Services were particularly careful in ensuring that no area of the pipe was left without SylWrap CR. This required precision application close to the steel hoops.

The final result was a very smart pipe bridge now well protected from future corrosion and reinforced against breaches by Liquid Metal and SylWrap CR. Arch Services have subsequently become Sylmasta’s approved contractor for similar projects after their excellent documentation of the process and attention to detail.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Water Treatment Plant in Puerto Rico Repair Worn Pump Extracting from a Well

Ceramic Brushable Green Epoxy Coating used to repair a worn water well pump at a treatment plant in Puerto Rico

Pump it up – the repair which allowed a water treatment plant to keep pumping water from their below ground well

Sylmasta provide a long-term repair solution for a water treatment plant in Puerto Rico, whose pump extracting from a below ground well had become heavily worn due to minerals and sediment in the water.

Case Study Data

Site
Water treatment plant
Location
Puerto Rico
Repair Type
Damage repair
Defect
Heavily worn pump extracting water from a well

Products Used

Ceramic Brushable
Brushable epoxy coating used to refurbish and repair the worn pump, restore it to original thickness

Case Study PDF

Download

Case Study Details

The large water pump was used by the water treatment plant to extract water from a well. The water was then distributed around the entire site for various purposes, making the pump central to operations.

This natural groundwater contained minerals, sediments and impurities which caused deterioration to the pump. Over time, the pump became so worn and degraded that there was a substantial risk of bursting.

A burst would have been a disaster for the plant. Operations would have needed to be shut down and a replacement pump fitted. This would have been a costly and time-consuming exercise, potentially involving the fabrication of a new pump and its shipping to Puerto Rico.

Before the water well pump reached the stage whereby it needed to be replaced, the treatment plant decided to repair and reinforce the system using a hard-wearing, abrasion resistant coating.

Ceramic Brushable Green Epoxy Coating was used for the application. Ceramic Brushable is reinforced with silicon carbide, giving it a toughened, ultra-smooth finish.

It is painted onto surfaces which have suffered heavy damage or been weakened by corrosion and abrasion, restoring their strength and protecting the original part from further damage.

Ceramic Brushable Green Epoxy Coating used to repair a well water pump which had become extremely worn at a treatment plant in Puerto Rico
The well pump repaired and strengthened with Ceramic Brushable Green

The two parts of the epoxy coating were mixed in the prescribed ratios and then brushed onto the pump. The 90 minute gel time of Ceramic Brushable enabled more epoxy to be mixed and applied without the threat of premature curing.

Four coatings were used, each between 1mm and 2mm thick. This built up a substantial, reinforced shell around the worn pump to restore the weakened metalwork to its original thickness.

With a recoat time of around four hours, it took two days to complete the repair. The application took place overnight whilst the site was shut down to limit disruption and the cost was insignificant compared to fitting a new pump.

The treatment plant now monitors the pump on a regular basis for future wear caused by corrosion and erosion. When there are concerns that it is becoming too weak, further coatings of Ceramic Brushable are added to restore integrity.

Speaking about the process, the maintenance manager at the plant said: “The pump deteriorates very soon but coating it in Ceramic Brushable helps a lot.” In this way, Sylmasta have provided a cost-effective and long-term solution.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Superfast Steel Epoxy Putty Used to Fix Rust Holes on a Classic Car

Superfast Steel Epoxy Putty used to fix rust holes in the metal frame of a steel car

How to fix rust holes on a classic car in a repair time (nearly) as quick as a lap of Silverstone

When rust holes developed on a classic car, the owner turned to Superfast Steel Epoxy Putty as a cost-effective, quick and easy way to permanently fix the problem.

Case Study Data

Repair Type
Metal filler repair
Defect
Rust holes in classic car

Products Used

Superfast Steel Epoxy Putty Stick
Metal repair putty used to permanently fill rust holes and help prevent further corrosion

Case Study PDF

Download

Case Study Details

The classic car had developed a rust hole. Corrosion had eaten away at a section of the inside car door where the window mechanism was anchored, causing it to fail.

As a DIY enthusiast, the car owner wanted to find a quick, cost-effective and easy method to permanently fix the rust hole. The owner required a lightweight, metal filler material which would offer resistance to water, temperature extremes and future corrosion.

Heavy corrosion had caused significant rusting to the inside door of the car

They decided to use Superfast Steel Epoxy Putty Stick for the application. Superfast Steel sets in under 10 minutes and makes permanent repairs to damage in steel, iron and other ferrous metals.

Before the repair began, the metalwork was cleaned and prepared as best as it could be. Dirt, grime, and rust were removed. Moisture repellant spray was used to drive moisture and grease out from the crack and leave a fine lubricating film to protect against corrosion.

The area was cleaned prior to repair

Once preparation was completed, the required amount of Superfast Steel Epoxy Putty was cut from the 114g stick and kneaded by hand. Whilst soft, the putty was pushed into the hole in the metalwork, where it was shaped and moulded around the screw.

Within 10 minutes, the putty had begun to harden into a material sharing the look and feel of steel. Maximum properties were reached after an hour, leaving the hole filled and the damage caused by corrosion repaired.

Superfast Steel Epoxy Putty used as a metal filler in the fix of rust holes on a classic car
Superfast Steel filled the hole. Once fully cured, it was painted red to match the car

Once cured, the putty was filed and painted red to appear uniform with the rest of the metal frame. The total cost of the rust hole repair was less than £20, including delivery of the Superfast Steel Stick.

The Superfast and Sylmasta AB ranges of epoxy putties are used frequently across various sections of the motoring industry, including classic car repairs such as this one and in Formula One.

Lightweight yet robust repair materials which are straightforward to use and effective quickly provide the sort of speedy repairs required when it comes to fixing damage on cars.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Reinforcement of 6 Metres of Corroded Steel Pipe in a Fire Station Pumping House

A steel water pipe suffering from heavy corrosion undergoes repair and refubishment in a protection application carried out using SylWrap HD Pipe Repair Bandage

Pump it up – the SylWrap reinforcement of a corroded steel water pipe which kept a fire station pumping water

A six metre long section of steel pipe – which included two 90 degree elbow bends – operating in a water pumping house at a fire station in Saudi Arabia required urgent reinforcement before the heavy corrosion the pipe was suffering from breached the line.

Case Study Data

Site
Fire station pump house
Location
Saudi Arabia
Repair Type
Pipe reinforcement
Defect
Six metre long section of steel pipe suffering from heavy corrosion

Products Used

SylWrap HD Pipe Repair Bandage
Composite repair wrap which was wrapped and moulded around the pipe, forming an impact resistant protective sleeve

Case Study PDF

Download

Case Study Details

The 150mm steel pipe brought water from a reservoir on the lower levels of the pumping house up to the top levels, where it was required for different operations at the fire station.

After many years of service, the pipe was suffering from heavy corrosion. The damage was particularly bad on the section of pipe beneath the surface of the reservoir, where it was exposed to constant contact with water.

The pipe was suffering from heavy corrosion, particularly towards the bottom of the line

Although the pipe had not yet been breached, the metalwork had been weakened to the point where it was only a matter of time before corrosion caused cracks and holes to appear. Replacing the six metre section after this happened would have been difficult because of the shape of the pipe.

There were two 90 degree elbow bends in the pipe. The first changed the pipe direction from running vertically up and out of the reservoir to horizontally at the point where the line reached the upper levels of the building. The second was some 50cm further along, taking the pipe off to the right to connect with valves and equipment.

A steel pipe suffering from corrosion prior to undergoing reinforcement using SylWrap HD Pipe Repair Bandage
Two 90 degree bends in the pipe meant replacing the damaged section would be difficult

The complex shape meant that replacing the line would require specially fabricated parts at considerable expense. Not only was the cost prohibitive, but there was the possibility the station might be decomissioned in several years time.

With resources stretched, spending money on the expensive installation of a replacement pipe only for the pump house to be taken out of service within a decade would not have been a good use of funds.

The station therefore sought to carry out pipe reinforcement of the existing steel line instead, strengthening it and protecting it against further corrosion. This would extend the lifespan of the line until a decision was made about the future of the pump house and the station.

SylWrap HD is applied to a steel pipe at a fire station as part of a reinforcement application
SylWrap HD could be easily moulded around the complex shape of the pipe

It was decided to wrap the entire six metre section in SylWrap HD Pipe Repair Bandage. SylWrap HD is a composite wrap with a water activated resin which sets in minutes to provide an impact resistant protective sleeve around pipes and structures.

Starting from the upper level of the pump house, SylWrap HD was applied to the pipe with a 50 percent overlay. More water was used to smooth the bandage as it was wrapped, moulding it tightly to the line and around both of the bends.

The reinforcement of a steel pipe at a Saudi Arabia fire station made using SylWrap HD Repair Bandage
Completed reinforcement of the top level of the pipe
Completed reinforcement of the bottom level, including the underwater section

The repair continued in this manner as the line headed down to the lower levels of the pump house, including when the pipe went beneath the surface of the reservoir.

SylWrap can be applied and sets underwater, enabling every part of the pipe to be refurbished. Once fully cured, the bandage formed a rock hard shell encompassing the entire line and offering new strength to the pipe.

Within two hours, the repair had been completed and the entire line reinforced. The SylWrap sleeve surrounding the pipe prevented further external corrosion attacking the exterior and weakening the line, reducing the chances of future failure.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Refurbishment & Repair of Power Plant Condenser Unit Deformed by Corrosion

A cast iron face deformed by corrosion in a power station condenser unit undergoes repair and refurbishment using Sylmasta Ceramic Supergrade Abrasion Resistant Epoxy Paste

Putting a new face on it – the cast iron face of a turbine cooler condenser unit deformed by corrosion undergoes repair and refurbishment

Replacing a turbine cooler condenser unit because of a cast iron face deformed by heavy corrosion was not a cost-effective solution for a power plant in Puerto Rico, so they instead turned to Sylmasta for a repair and refurbishment method.

Case Study Data

Site
Electrical Power Plant
Location
Puerto Rico
Repair Type
Metal repair & corrosion resistance
Defect
Turbine cooler condenser unit deformed by corrosion

Products Used

Ceramic Supergrade
Epoxy paste used to rebuild the deformed cast iron face via the creation of a new corrosion and abrasion resistant surface

Case Study PDF

Download

Case Study Details

The condenser was part of the turbine cooler at the electrical power plant operated by the Puerto Rico Power Authority. It was used to condense steam back into water and had been in operation for approximately 20 years.

There were two components of the condenser. The tubes were made from bronze and the face was made from cast iron. Having been exposed to steam and water for over two decades, the cast iron face had become heavily corroded and deformed.

The corroded, deformed face of the cast iron condenser prior to repair

Replacing the condenser would have been an extremely costly exercise compared to the value of the turbine cooler as a whole, which itself would need replacing within the next 5 to 10 years.

Parts were no longer made for this particular type of condenser because of its age, and so a replacement face would have had to be specially fabricated and then shipped to Puerto Rico.

Rather than install an expensive new condenser with a lifespan of 20 years for a turbine that would have to be condemned long before that, the Power Authority instead sought a way of keeping the condenser in operation until such time as the whole turbine needed replacing.

Sylmasta recommended the use of Ceramic Supergrade Abrasion Resistant Epoxy Paste for the repair and refurbishment of the condenser, to rebuild the deformed face and offer protection from future corrosion and wear.

Ceramic Supergrade is filled with silicon carbide for ultimate surface hardness and an extremely smooth finish. It is applied to worn or damaged surfaces to rebuild, or to new equipment to protect parts from abrasion, corrosion and chemical attack.

Before the application began, the condenser was cleaned as best it could be, with traces of rust and grime removed. Rods were inserted into every tube hole in the face, covering them so that they did not become inadvertently filled with epoxy paste.

Ceramic Supergrade Epoxy Paste used to rebuild the cast iron face of a condenser unit damaged by heavy corrosion in a repair and refurbishment application
Ceramic Supergrade built a new, ultra-smooth layer with high corrosion and abrasion resistance over the original deformed cast iron face

Ceramic Supergrade was then applied to the face around these rods. The epoxy paste filled in imperfections in the cast iron as it was built up to create a new, waterproof, surface on top of the original deformed face with high resistance to abrasion and corrosion.

The 60 minute work time of Ceramic Supergrade allowed large quantities of the paste to be mixed and applied carefully without the threat of premature curing.

A full cure was achieved in 24 hours, after which the condenser could be returned to the turbine and the system put back into operation following a successful epoxy paste rebuild. The high-wear resistance of Ceramic Supergrade would keep the condenser in service for many more years.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Corroded Tank Repair at a Puerto Rico Pharmaceutical Plant

A heavily corroded tank at a pharmaceutical plant in Puerto Rico undergoes repair using Ceramic Brushable Green Epoxy Coating

Putting a lid on corrosion – the roof of a heavily corroded tank undergoes repair using Ceramic Brushable Green

When rust finally breached the top of an industrial tank at a pharmaceutical plant in Puerto Rico, a repair method was needed to keep the corroded tank operational for several more years before a planned replacement.

Case Study Data

Site
Pharmaceutical plant
Location
Puerto Rico
Repair Type
Corrosion protection
Defect
Heavy corrosion to the top of an industrial sized tank

Products Used

E190 Brushable Epoxy
Brushable epoxy resin coated onto strips of Fibreglass Tape to make composite patch repairs to holes in the tank

Fibreglass Tape
Fibreglass Tape soaked with E190, after which it cured to form a rock hard material covering holes in the tank

Epoxy Composite Repair Kit
E190 Resin and Fibreglass Tape can be purchased in an Epoxy Composite Repair Kit for making complex patch repairs to pipes and tanks

Ceramic Brushable Green
Brushable epoxy coating repaired the top of the tank by creating a hard-wearing surface resistant to corrosion

Case Study PDF

Download

Case Study Details

The tank was suffering from heavy corrosion, especially at the top. The pharmaceutical company responsible for the plant had been determined to try and keep the system operational until the scheduled replacement of the tank.

Unfortunately, the corrosion became so bad that a repair had to be made. The primary consideration was cost; the company did not want to spend thousands of dollars refurbishing a tank, only for it to be condemned within a few years.

A badly corroded tank top at a pharmaceutical plant in Puerto Rico prior to undergoing repair using a Sylmasta brushable epoxy
The top of the tank was suffering from heavy corrosion

It was decided to use Ceramic Brushable Green Epoxy Coating as a cost-effective and convenient means of both repairing the damaged tank roof and protecting it from further corrosion.

Ceramic Brushable Green is reinforced with silicon carbide and painted onto surfaces, structures and machinery to create an ultra-smooth, hard wearing protective layer.

It can be applied to old or new parts made from all metals and most plastics. It seals surfaces and protects against chemical attack, cavitation, erosion and pitting, as well as corrosion.

Large holes appeared in the tank during the surface preparation process

Before the application of Ceramic Brushable Green, the roof of the tank had to be cleaned to remove paint, rust and grime. During this process, several holes appeared in the tank owing to how brittle the metalwork had become.

The holes were bridged using Fibreglass Tape coated with Sylmasta E190 Brushable Epoxy Resin, available to purchase together as part of the Sylmasta Epoxy Composite Repair Kit.

Strips of Fibreglass Tape were cut off, soaked with E190 resin and then layered over each hole to build a composite patch repair. E190 has a work time of 30 minutes, after which the resin-soaked strips cured to form a rock-hard material sealing all holes.

A corroded tank top undergoing repair using a brushable epoxy
Ceramic Brushable Green used to repair a corroded tank top by creating a new hard wearing surface
E190 Epoxy Resin and Fibreglass Tape patch repaired holes. The tank was then coated with Ceramic Brushable Green Epoxy Coating

Once the holes had been path repaired, the entire tank was painted with Ceramic Brushable Green. The 90 minute gel time meant that large quantities of epoxy coating could be mixed without the threat of premature curing.

Three coatings of Ceramic Brushable Green were applied. The re-coat time between layers was around four hours. A full functional cure was achieved 24 hours after the last coating, with the entire application taking a little under two days to complete.

Although only set to be a temporary repair, complications down the line meant that the planned replacement of the tank had to be suspended. Five years later and the tank was still in service, fully functional thanks to Ceramic Brushable Green with no signs of further corrosion.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Reinforcement of Weakened Pipe Elbow Joint on 100mm 22 bar Sulphuric Acid Line

A 100mm pipe elbow undergoes reinforcement after the sulphuric acid line it was part of was found to have degraded by 21mm thickness

Chemical romance – the repair and reinforcement of a sulphuric acid line pipe elbow found to have degraded in thickness by 21mm

A pipe elbow on a 100mm sulphuric acid line operating under 22 bar pressure which had degraded from 22mm thickness to just 1mm undergoes urgent repair and reinforcement in Saudi Arabia.

Case Study Data

Site
Petrochemical Refinery
Location
Saudi Arabia
Repair Type
Pipeline reinforcement
Defect
Weakened elbow joint on a 100mm sulphuric acid line

Products Used

Industrial Metal Epoxy Paste
Applied to the elbow joint to strengthen it via the creation of a shell resistant to corrosion and chemical attack

SylWrap HD Pipe Repair Bandage
Applied over Industrial Metal for further reinforcement by encompassing the elbow with a rock hard protective sleeve and increased hoop strength

Case Study PDF

Download

Case Study Details

The petrochemical refinery produces over 140 million barrels of petroleum products and 5 million tons of petrochemical products every year, including naphtha, kerosene, gasoline, diesel and fuel oil.

During a routine inspection, a 100mm sulphuric acid line operating under 22 bar pressure was found to have degraded to only 1mm thickness from 22mm on an elbow joint. This required urgent attention before the line failed.

The scale of production at the site meant that the petrochemical company were keen not to have to shut down the line to replace the weakened section, as this would severely impacted on output.

They therefore needed a flexible method of reinforcement for making an effective repair to the elbow on the sulphuric acid line which, for example, a pipe repair clamp would not have been capable of.

A pipe elbow in a line carrying sulphuric acid undergoes repair using Sylmasta Industrial Metal Epoxy Paste
The elbow joint was reinforced using Industrial Metal Epoxy Paste

The petrochemical refinery consulted an engineering company with whom Sylmasta work with in the region, and they decided to apply Industrial Metal Epoxy Paste to the elbow to strengthen it.

Industrial Metal is reinforced with corrosion-resistant metal platelets which provide excellent protection against corrosion and chemical attack, creating a tough outer shell around pipes and structures.

Industrial Metal Epoxy Paste is applied to a pipe elbow joint in Saudi Arabia to reinforce a weakened 100mm sulphuric acid line
Industrial Metal applied to the elbow using a putty knife

The epoxy paste was spread over the area requiring reinforcement using a putty knife. The 60 minute work time allowed for a large quantity of paste to be mixed and applied without the threat of premature curing, an especially important consideration given the hot climate.

If the remaining 1mm degraded further and the original line was breached, its contents would now be contained by a casing with high chemical and corrosion resistance surrounding the elbow provided by the cured Industrial Metal.

To further reinforce the elbow, SylWrap HD Pipe Repair Bandage was applied over the Industrial Metal. SylWrap HD is a composite repair wrap with a water activated resin which sets rock hard in 30 minutes.

It provided an impact resistant layer of protection over the elbow, increasing the hoop strength of the line until such time as a replacement could be conveniently carried out.

Repair completed with SylWrap HD for increased hoop strength

Whilst the reinforcement took place, the pressure was reduced to 8 bar with only a minor amount of disruption to operations at the site. 24 hours after the repair had been completed, the line was restored to its normal 22 bar pressure..

The petrochemical refinery were delighted with the ease and speed of repair made possible by Sylmasta. Regular inspections of the line showed that there had been little to no decrease in the strength of the repair over two years later.

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com

Posted on by

Case Study: Reinforcement of Weakened 22 Degree Cast Iron Pipe Elbows

Reinforcement of 22 degree elbows on cast iron water mains carried out by Sylmasta

Ending a potentially explosive situation – Sylmasta provide reinforcement for pipe elbows following a blowout in a valve chamber

A blowout in a valve chamber in Grimsby, United Kingdom, alerted a water company to the fact that numerous 22 degree 450mm cast iron pipe elbows were below specification and required urgent reinforcement to prevent further incidents occurring.

Case Study Data

Site
Valve Chamber
Location
Grimsby, United Kingdom
Repair Type
Elbow joint reinforcement
Defect
Below specification 22 degree elbow joints on 450mm cast iron water mains

Products Used

Liquid Metal Epoxy Coating
Offered protection to the pipework from factors such as corrosion and created a PCC-2 compliant load transfer layer with SylWrap HD.

SylWrap HD Pipe Repair Bandage
10 layer application reinforced each elbow joint by providing an impact-resistant protective sleeve.

Case Study PDF

Download

Case Study Details

Numerous large diameter water mains made from cast iron were operated by the water company with most of these approximately 50 years old.

After an incident in a valve chamber in Grimsby where a 22 degree bend on a 450mm main blew apart, analysis of the cast iron showed that the original castings were below specification.

The incident was believed to have occurred when the water main pump from the reservoir to the treatment works stopped and the non-return valve closed, causing a pressure surge which peaked at 10 bar from zero.

Analysis of the cast iron pieces showed no corrosion along the crack lines. The blowout was therefore most likely caused by the low strength of the original casting which had a hardness of only 107.

To prevent similar incidents occurring again, the water company needed to carry out reinforcement of all remaining pipe elbows of the same specification.

  • Pipework in a valve chamber where Sylmasta carried out the reinforcement of 22 degree cast iron pipe elbows
Pipework in the Grimsby valve chamber

The length of the repair area was 350mm between flanges and the application needed to withstand 8 bar operating pressure with fluctuations up to the 10 bar which had caused the original blowout.

Sylmasta advised using Liquid Metal Epoxy Coating and SylWrap HD Pipe Repair Bandage to strengthen the elbow joints against future pressure surges and other factors including corrosion.

Each pipe was cleaned prior to being coated with Liquid Metal, a metal-filled brushable epoxy which sets to a smooth, metallic, hard-wearing surface over pipework.

Coating the elbow joints with Liquid Metal provided corrosion protection and improved adhesion between the pipework and the SylWrap HD Bandage, creating a PCC-2 compliant load-transfer layer.

10 layers of SylWrap HD were then applied over the Liquid Metal. SylWrap HD is a composite repair wrap with a water-activated resin which sets rock hard in minutes, providing reinforcement to pipework pressure resistant to 30bar.

  • Reinforcement of elbow joints in a valve chamber made using Liquid Metal Epoxy Coating and SylWrap HD Pipe Repair Bandage

Each elbow joint could be reinforced in two to three hours and there was no need to turn off the water supply to complete an application. Sylmasta’s repair saved the water company considerable money compared to replacing the below specification pipework and the necessary shutdown of equipment.

After the repair, the strategic water operations manager told Sylmasta: “The wrapping materials have proved central to our project in securing the structural condition of some 22 degree bends found to be in weak condition.”

“The early success of the project in Grimsby has seen it already adopted by other sites in our network, with Hartlepool also happy with it as a preventative measure and more to follow.”

If you have an application you would like to enquire about, then please get in touch

Call: +44 (0)1444 831 459
Email: sales@sylmasta.com