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Category: Carbon fiber

CS-009 Additional reinforcement of the pipeline diameter of DN530 mm

The operator of the high-pressure crude oil pipeline requested additional protection due to the planned construction of a motorway above this 20-inch line. The pipeline should be strengthened for a length of 40-meters.

Challenge

Wrapping a pipeline of such a diameter for 40 meters is a job that requires good organization. A blasted and clean surface of the pipeline should be wrapped as soon as possible to avoid flash rust. Irregular surfaces will be treated by a Putty, a compressive modulus filler, followed by applying the Primer for an optimal adhesion between the wrap and the pipeline. The process of mixing and setting of these two-component epoxies is irreversible. The surface still needs to be a bit sticky when the impregnated carbon cloth is wrapped around the pipe. The whole process should be performed in steps and the team leader should keep all crew members busy during the installation.

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CS-008 Repairing dents in an underground carbon-steel pipeline

Dents in transmission pipelines are a common problem that need to be fixed as soon as possible. Dents will make the pipeline in that particular area weaker. There is a chance of crack forming or even creation of a hole if the dents are not properly repaired. CTE BV is working with epoxy composites and carbon fiber cloth to save repair the pipeline. Compressive Modular Filler (CMF) is applied to bring back the dent area in it’s normal shape. The carbon fiber cloth in combination with epoxy composites will bring back the integrity of the pipe after curing. The case study explains how to approach a dent defect in your pipeline. The repair is performed according the standard ISO 24817.

Challenge

The repair has to take place under pressure to push out the dent as much as possible before applying the CMF putty and carbon fiber wrap. Often natural gas pipelines are buried and access is only allowed when the installer did receive a confined space training.

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CS-007 Repairing a carbon-steel pipeline 11 meters above the ground

Repairing a tee using composites needs a special training program. During Level-1 training courses applied by CTE BV applicants will be trained according ISO 24817 and/or ASME PCC-2 standards. If applied correctly the number of layers over the defected area should count 4-8 layers. In this case one of the girth welds needed to be strengthen by applying a carbon fiber and epoxy composite repair. This operation is a very common activity that trained installers perform daily.

Challenge

The particular challenge in this case was working at height and with a High Temperature solution. Access to the repair area was complicated due to the lack of being able to bring in aerial platform equipment. Scaffolding was the only possibility for the installers to save repair the tee. Although the cost for scaffolding and other safety precautions did increase operational costs, the composite repair was preferred above replacing this part of the pipe. Finally the high ROI (Return on Investment) did decide management to carry out the repair.

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CS-005 Repairing a massive carbon steel pipe within 24 hours

A small leak under a metal sleeve at a 28” pipe is a problem and requests a fast and proper solution. The size of the sleeve basically would be considered as the defected area which required a repair of a reasonable size. By dropping the pressure in the pipeline the small leak was stopped and contained. Immediately after the leak was stopped the engineered carbon fiber epoxy based system was applied covering the sleeve and surrounding pipe area. The multi-layer carbon fiber solution will last for many years.

Challenge

The timeframe between starting preparation of the 100 kg repair kit, shipping from the Netherlands to Croatia, installing the wrap and curing of the epoxy was roughly 24 hours.

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Carbontech Composites certifies its carbon fiber wrap system Revowrap

Carbon Tech Europe BV proudly announce the certification by TUV of the Carbon Composite Repair Programs Revowrap110™, Revowrap185™ and Revowrap225™. This certificates’ scope include but is not limited to the Gas & Oil Industry, Power Plants, Mining and Transmission Pipelines. With this step we make the wrap program even more complete. We are ready to help our clients in Europe, Earasia and Northern Africa.

Check our TUV ISO 24817 Certificate

CS-003 Proactive corrosion protection for a carbon steel storage tank

Tank repair by applying composites is getting more and more popular. Often the roof of a tank is affected by corrosion. Corrosion due to the medium (might be aggressive) or exposing to the weather conditions. Also the tank wall itself might be exposed to corrosion. Often cracking or degradation of the wall is a problem. In the Netherlands and Belgium we as CTE BV are providing these services by installing carbon patches. The case study below is describing the repair of cooling water tanks suffering from internal corrosion at a steel plant.

Challenge

Cooling water is an important part of the process of making steel. Without proper cooling a plant can come to a standstill. Working inside a tank requires a special training (confined space) on top of the normal installation certificate.

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CS-001 Repairing an active leak at a natural gas carbon steel pipeline

An active leak in a natural gas transmission pipeline is a nightmare for every gas distributor. It creates an environmental undesirable and dangerous situation that needs to be fixed as soon as possible. Stopping the leak was the first step in the process of repairing the pipeline. In this case the girth welds of the pipe were showing weak points and in one particular case there was a small leak. After the leak was stopped by using a low-profile leak sealing solution provided by CTE BV the engineered carbon fiber epoxy based system was wrapped around the repaired area. The particular area was secured for future leakages.

Challenge

Besides stopping an active leak also the winter circumstances did ask for a professional approach towards a successful repair according ISO 24817.

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