PIPELINE CONTAMINATION & BLACK POWDER FORMATION
One of the biggest and most prevalent problems affecting the efficient operation of pipelines is commonly known as black powder. In simple terms, it is an accumulation of corrosion which typically forms in gas, oil, petrochemical and aviation fuel pipelines. The resultant financial costs across worldwide industry are enormous. It can form at throughout most stages of the process in either a powder, liquid or a black sludge substance built up from very fine often sub-micron particles.
A combination of the presence of water, oxygen, hydrogen sulfide and carbon dioxide acts as a catalyst for corrosion of ferrous steel pipe. Ultimately this produces black pyrrhotite, more commonly known as black powder. Whilst the formation is gradual black powder can accumulate to several thousand kg in untreated pipelines. Natural erosion from contact from the substance in the pipe with the pipe wall can further add to the accumulation.
WHY IS PIPELINE CONTAMINATION A PROBLEM?
HEALTH & SAFETY
CONTROLLING BLACK POWDER
There are many ways of trying to control black powder accumulation, traditionally membrane or barrier filters such as cyclones, separators, cone or basket strainers are used. However, they are generally limited in terms of particle size they can collect and are prone to reducing flow. They also use consumable filters which can be costly and incur expensive waste disposal costs. Disposing of consumable filters also has an environmental impact adding to pollution and landfill.
More recently, advances in in magnetic technology and enhanced understating of fluid flow dynamics have given rise to the development of high performance magnetic filters such as Ultrafiltrex, which extract sub-micron sized particles and do not rely on consumable components.