TPi May 2014

products & developments

Large diameter seamless pipes Interpipe has begun production of large diameter seamless pipes according to GOST and EN standards. The pipes are developed at Interpipe NTRP, where the previous maximum range was limited to 377mm. according to GOST standard for the 32XA steel grade. These were developed for Polish consumers. Finally, in the third quarter of 2013 Interpipe produced and delivered to German consumers pipes of 406.4mm in diameter with 10 to 70mm wall thickness in accordance with European standards EN 10210- 1, 2 and EN 10297-1 in steel grades S355J2H/E355. In October 2012 experimental pipes of 426mm in diameter with 10mm wall thickness were produced for Belorussian consumers. In January 2013 a new size of 406.4mm in diameter with wall thicknesses of 50 and 68mm was made Ivan Mazanka, regional sales director for Europe at Interpipe, said, “Big diameter

seamless pipes are currently in high demand globally; however, the number of suppliers for these products is limited. For this reason manufacturing pipes with diameters of 406.4 and 426mm is a very good opportunity for us to meet these needs by delivering high quality products in accordance with our European customers’ requirements.”

Interpipe – Ukraine sales.eu@interpipe.biz www.interpipe.biz

Longitudinally welded stainless steel tubes for heavy-duty service

Brake lines are safety-critical equipment. Therefore, the customer had defined exacting specifications for the mechanical and chemical properties, the tolerances and the surface quality. Schoeller Werk met these specifications. The new tubes are made of the same material as those used in the past: grade 1.4301 with an elevated nickel content. With a weld strength reduction factor of 1.0, the Schoeller tubes feature the same strength value as seamless tubes of identical dimensions. The contract provides for the supply of ten different sizes with outside diameters between 6 and 28mm. Schoeller Werk is able to make the complete size range in its own production plant. Stefan Brilling, manager industrial sales at Schoeller Werk, commented, “Many engineers still consider seamless tubes as ‘sacred cows’. Yet, our longitudinally welded tubes have already proved to be successful in many applications, including highly demanding and safety- critical ones. But this recent order speaks for itself. Featuring a weld strength reduction factor of 1.0, our tubes can be installed without having to make any changes to the design. Tubes of the same dimensions provide the same strength but cost much less.”

for this application. As prices are lower and lead times shorter, the customer will change to welded tubulars as transmission pipes in braking systems. Schoeller Werk had conducted comprehensive tests on 5km of sample tubes at the customer’s facilities. In these tests, the company proved that longitudinally welded tubes are equal to seamless tubes in terms of mechanical properties and surface quality. The result is a multi-year supply agreement.

Welded tubesmanufacturedbySchoeller Werk have passed approval tests as transmission in railway applications. With these tubes, the customer will get products with the same hardness specifications but at around 50 per cent lower costs, according to the manufacturer. The company has received the first order for longitudinally welded tubes to be used as transmission in trains. In the past, only seamless tubes were used

Stainless steel tubes on their way to the heat treatment section

Schoeller Werk GmbH & Co KG – Germany

info@schoellerwerk.de www.schoellerwerk.de

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Tube Products International May 2014

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