TPT July 2007

P lastic & C omposite T ube: P roducts & M anufacture

material is transported via an agitator and a special twin-screw feed into the stuffing unit above the extruder feed throat. The parallel twin-screw extruders in Krauss- Maffei’s 36D range are designed for optimal processing of PVC. They are capable of combining very high output with maximum protection for the mechanical properties of the product. The 36D extruders have internally heated screws and air-cooled barrels. They are offered in four sizes: KMD 75-36, KMD 90-36, KMD 114-36 and KMD 133-36. The rheological design of Krauss- Maffei’s spider-type pipeheads ensures a homogenous melt and ensures perfect fusing of the melt downstream of the spider legs. Hakan Plastik AS, Turkey, specialises in manufacturing highly-filled PVC pipe. The company already operates five Krauss- Maffei extrusion lines for this application, and has ordered two more lines which went into operation earlier this year. Krauss-Maffei Kunststofftechnik GmbH – Germany Fax : +49 8988 99 2206 Website : www.krauss-maffei.de Hillinger+Partner, Germany, has announced the completion of a 1,000+ page market study, titled Plastic Pressure Piping Products (PPPP) – World Market. The study, which is available in both German and English language versions, contains deep analysis, and quantitative and qualitative descriptions of the world market of valves, fittings, pipes, flow measuring and control, and plastics including ABS, PB, PE, PP, PFA, PVC, and PVDF. The study contains 500 images and illustrations, 220 pages of concise tables, and clear definitions with more than 100 market segments and target groups. Also included are 100 double-sided competitor profiles with turnovers, employees, essential information about the company, and strengths and weaknesses, and a listing of more than 3,700 main customers along with their purchasing potential. Major industry study into plastic pressure piping

Higher filler content saves costs in PVC pipe production

Manufacturers can significantly reduce feedstock costs for PVC pipe by increasing filler content. The engineering challenge is to guarantee a stable process and consistently good product quality, even for highly filled pipe. Krauss-Maffei, Germany, manufactures 36D twin-screw extruders that have proved successful in processing highly-

filled formulations. For PVC wastewater pipe, filler content of up to 65 parts (approximately 40 per cent) chalk (CaCO 3 ) is feasible. Highly filled pipes with diameters between 50mm and 500mm are used for transporting wastewater. To facilitate processing of highly filled formulations, the extruders have special material feed, weighing and metering systems. The PVC dryblend and the CaCO 3 are transported from the storage

fi The twin-screw extruders in Krauss-Maffei’s 36D series are engineered specifically for processing PVC

container to the hopper of the gravimetric metering unit with the help of a spiral feed screw. The hopper is fitted with shakers and agitators to prevent bridging. In addition, all metering unit surfaces in contact with the material have a special coating to guarantee unimpeded material flow. From the metering unit, the

Loose aluminium flanges for PE/PVC plastic pipes Fonderia Fazzini Srl, Italy, produces loose aluminium flanges for PE and PVC plastic pipes, branded FF-PL and FF-PV. Loose aluminium flanges are an alternative to those

made from other materials as they benefit from aluminium characteristics including light, hard, corrosion resistance, and cost efficiency. The inside diameter of these flanges is qualified for plastic pipes according to UNI-DIN standard. The mating dimensions are in accordance with the EN 1092-1 PN10/16 standard. The aluminium flanges can be supplied blank, sand-blasted or coated, and are manufactured from EN AC-47000 aluminium alloy. With 40 years of experience in aluminium flanges, the company produces a wide range, not only for plastic pipes, but also for steel pipes.

› The loose aluminium flanges for use with PE/PVC plastic pipes

Fonderia Fazzini Srl – Italy Fax : +39 0331 263025 Email : info@fonderiafazzini.it Website : www.fonderiafazzini.it

Hillinger+Partner – Germany Fax : +49 7231 70457

Email : hillinger@hillinger-partner.com Website : www.hillinger-partner.com

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J uly /A ugust 2007