PRODUCTION • PROCESSING • HANDLING
properties of the product to be transferred, including temperature, pressure and viscosity – as well as the necessary standards and their specific requirements – are all scrutinised under hydrodynamic analysis (static, dynamic or extreme). Tis allows for a detailed comparison report on the limitations of each hose to be developed. As the number of off-loadings will also affect the strain placed on the hose – particularly in more extreme environments – the hoses used in these conditions are also tested against stress and strain databases for fatigue analysis, which is mandatory under API Spec 17K Standard.
CHOOSE THE RIGHT TOOL FOR THE JOB Based on this testing and analysis, suppliers will be able to recommend the most suitable option for each task. Hose selection is too important to adopt a ‘one-size-fits-all’ approach, and different options must be carefully considered. In most cases, the suitable solution for non-harsh, low cost extraction environments will be a single or double carcass nipple hose, such as the Sealine design used by Trelleborg. Te manufacture consists in using binding steel wires fixed on the nipple flange to block the hose body structure made with textile layers and reinforced by a steel helix. Te standard nature of this design means that this type of hose is the most commonly used in today’s market, in both floating and submarine configurations. For extremely challenging
environments or long service life, more specialised solutions may be required. In this case, nippleless technologies such as Trelleborg’s Trelline or Kleline offerings can be used. Te nippleless
Submarine line
It is essential that suppliers support projects to ensure that the highest safety standards are upheld
technology means that there is no stiff metal connector that would reduce flexibility. Tese hoses can be used in both submarine and floating situations in which environments would be too challenging for a nipple hose.
MAINTENANCE Perhaps the most important area that needs collaboration, and something that is vital to upholding the highest safety standards, comes after purchase and installation; maintaining and servicing the equipment. It is essential that suppliers support
Floating hoses connected and ready for final installation
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projects throughout their execution to ensure that the highest safety standards are upheld, as well as guaranteeing the benefits of proper lifecycle management. Tis approach includes on-site inspection and testing for requalification, hose maintenance and inspection programmes, and on-site repairs to ensure that hoses are not only performing correctly but are meeting the required standards in safety and quality. Tis can even extend to undertaking specific investigation programmes. Tese may include inspections, tests on site or in the factory
Installation of a submarine line
such as burst tests, or ageing analysis of the components such as adhesion tests and elastomer property analysis. Suppliers can also choose to engage in training and education programmes, disseminating best practices on storage, transportation and maintenance of hoses. At its most basic level, hose management is risk management. Te process of understanding a transfer environment, determining the most suitable solution and making sure that it works in the long term, is a vital part of underpinning safe, efficient working practices. In the face of continued uncertainty, it remains essential to invest in the relationships that underpin these processes, and cementing a collaborative relationship between customer and supplier. l
Vincent Lagarrigue & Nicolas Landriere are with Trelleborg’s fluid handling solutions operation.
www.trelleborg.com
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