Solution provider since 2009
Advancing industries through materials technology
Our development and manufacturing of advanced stainless steels and special alloys is world-leading. It’s what we’ve been doing for over 160 years, and it’s still our reason to exist.
Fueled by our desire to care, deliver and evolve, we benefit our customers, our people, and the future we share. And it’s how we relentlessly push products and processes to be more efficient, more profitable, and more sustainable.
We are a leading manufacturer of high value-added products in advanced stainless steels and special alloys, as well as products for industrial heating. With close and long-standing customer partnerships, we advance processes and applications in some of the most demanding industries imaginable.
Our offering and in-depth expertise in materials technology, metallurgy, and industrial processes enable customers to become more efficient, profitable, sustainable, and safer.
Since the 1970’s Alleima has supplied quality products for high pressure urea service.
The best recognition for outstanding quality are that most plants in the world use our products and that the longest service record has been set with Alleima 2RE69.
The modern large scale urea plants are very efficient, in spite of the highly corrosive environments in the critical equipment. The high pressure and temperature in combination with toxic ammonia calls for best special stainless steel as Alleima 3R60 Urea Grade, Alleima 2RE69, Bimetallic tubes or Alleima Safurex.
The high standstill cost easily motivate the use of special material for longer and safer service.
We manufacture and stock tubes, pipes, fittings, bar, plates and welding consumables. The products conform to the specifications from leading licensees like Stamicarbon and Snamprogetti.
SAFUREX: The super duplex steel developed for service in the Stamicarbon urea process
+ Higher strength
+ Similar thermal expansion to carbon steel
+ Improved corrosion resistance in oxygen free urea solution
+ Welding properties
Safurex is superior to Alleima 2RE69, which has the longest service life to date in urea strippers. It is because Safurex can operate at lower oxygen levels in carbamate solutions than 2RE69. At normal oxygen levels the corrosion resistance of Safurex is same as for 2RE69 and the higher strength of Safurex also contributes to longer service life.
Safurex has improved resistance against stress corrosion cracking if exposed to chlorides, which can occur with 316L Urea Grade and 2RE69 if chloride content is higher than recommended on the steam side in H.P. carbamate condenser. In practical terms, stress corrosion cracking is not a problem when using Safurex in the H.P. carbamate condenser.
Safurex is a better choice than 316L Urea Grade and 2RE69 for usage in strippers, H.P. condensers, scrubbers, high-pressure piping and reactors. Tube, pipe, fittings, plate, bar and welding consumables are available for fabrication of new or replacement units.
The improved corrosion resistance means the oxygen addition can be reduced, which makes it possible for Stamicarbon to offer new and more cost effective plants. The operation becomes easier and more flexible and the capital cost is reduced compared with the older design.
Mr. Jari. Ponsiluoma
Product Manager Heat Exchanger and Fertilizer Tube EMEA
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