TPT May 2015

Technology News

Bonding of CRA lined pipes CRA lined pipes or CRA clad pipes are corrosion-resistant pipes consisting of a corrosion-resistant inner pipe and a carbon steel outer pipe that can withstand internal and external pressure. between the backing steel pipe and the CRA pipe by use of spring back variation can be performed by means of hydroforming or by a full length pipe expander.

CRA pipe with the company’s full length pipe expander, for which a patent is pending. The company has more than 40 years’ experience in designing and manufacturing full length pipe expanders for the LSAW pipe industry. A special expander head design is used to ensure uniform mechanical bonding of the inner and outer pipe over the complete contact area. The full length pipe expander is equipped with a linear transducer that accurately measures the position of the dies. Fontijne Grotnes Group – Netherlands Email: info@fontijnegrotnes.com Website: www.fontijnegrotnes.com

There is growing demand for CRA lined pipe due to the fact that corrosive conditions are expected to increase as produced fluids contain higher water cuts and greater concentrations of H 2 S and CO 2 . In addition, these increasingly corrosive products need to be transported over longer distances, with higher pressures, and in an environmentally friendly way. Fontijne Grotnes has found a solution to bond the backing steel pipe and the

THE purity of advanced materials, as they are used in medical technology, film extrusion, aerospace and automotive industry as well as the production of extra-high voltage cables, is a decisive characteristic for the quality of the final products. The production or use of entirely clean materials is essential. With the Purity Scanner, Sikora provides a user-orientated system for 100 per cent online inspection and automatic sorting of plastic pellets before they get into the next production process. The Purity Scanner combines X-ray inspection technology with a dual-axis optical inspection system. This allows the detection of metallic and organic impurities as small as 50µm inside the pellet and on its surface. Due to the specially developed X-ray technology, the Purity Scanner inspects even coloured pellets for impurities, and sorts them out automatically. Potential applications for pipes with CRA material are subsea pipelines for sour gas and oil, water reinjection systems, saltwater pipelines, and process pipes in the chemical industry. CRA lined pipes are mainly used as flow-lines, riser pipelines, interfield pipelines and water injection pipelines. There are two methods of bonding the CRA material to carbon steel: metallurgical bond (CRA clad pipes) and mechanical bond (CRA lined pipes). The metallurgical bond between two different metals (bonding of plates) is achieved by hot rolling, co-extrusion, weld overlay or explosive bonding. A disadvantage is the limited number of suppliers due to the demanding and complex manufacturing process of metallurgical bonding the plates, which creates high costs. Mechanical bonding

Full length pipe expander for CRA lined pipes

Contamination detection in plastic pellets

The Purity Scanner also features a unique system for transporting the pellets within the device. The feeding of the pellets is carried out via a stainless steel vibration feeder. The material does not come into contact with dust or other contaminants from the ambient air as the transport system is sealed

The Purity Scanner combines X-ray and optical techniques

concept was developed for customers who run different materials or colours, and want to clean the system when changing the material. In addition to cleaning, it is possible to exchange the complete transport system with a cleaned, sealed system.

and pressurised. This combination ensures that the system sorts out the contaminants without introducing new ones. The transport system is integrated into an encapsulated housing and slightly over pressurised, in order to prevent contamination from entering the system. In the event that cleaning of the system is required, the system can be quickly and easily opened. The cleaning

Sikora AG – Germany Fax: +49 421 48900 90 Email: sales@sikora.net Website: www.sikora.net

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M ay 2015