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| Since 1960, ATB manufactured more than 1000 pressure vessels. The annual production in terms of number of pressure vessels and weight is shown in the following diagrams. |
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Pressure vessels families manufactured by ATB: |
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Reactors and Separators for “hydro-processing” applications |
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Ammonia shell converters and auxiliary vessels |
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Reactors for Urea production plant |
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Separators for gas treatment plants |
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High pressure Vessels |
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CCR reactors |
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LNG cryogenic vessels 9%Ni material |
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Columns (heavy weight) |
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FCCU reactors/ Regenerators |
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IGCC Gasifier vessels |
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LDPE/HDPE separators |
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Polyethylene /polypropylene reactors |
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Acrilonitrile reactors |
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Coke drums |
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Steam Drums |
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Due to the continuous increase of refineries and petrochemical plants productivity, in the last years thickness, diameter and weight of reactors/vessels supplied increased up to the limits of the current manufacturing technology.
ATB policy is to focus on the most challenging jobs. Very powerful facilities and skilled workers made it possible for ATB to specialize in the manufacturing of pressure vessels of exceptional characteristics.
For reference, it has to be considered that up to now ATB has delivered equipment up to 358 mm thickness and maximum weight in one single piece of 1350 tons. The main data can be summarized as per table below: |
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| Thickness: |
Chevron LG process HCK reactor 358 mm |
| Weight: |
LC Fining Reactor of 1350 tons |
| Length: |
C2 Splitter Column of 90 m |
| Temperature: |
CCR Reactor capable to bear 650° C - Columns capable to bear – 196° C |
| Pressure: |
Vessel capable to bear 46 MPa |
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All qualities of steel produced to ASTM, DIN, British standards and to all western European standards are widely used by the company in the fabrication of pressure vessels, and namely: carbon steel, carbon steel with HIC properties, carbon steel for Low Temperature applications, all the qualities of low alloy steels (1/2Mo, 1Cr 1/2Mo up to 2 1/4Cr 1Mo including the last developments of the materials with enhanced properties and Vanadium modified chemical composition), steels for cryogenic service 9% Ni, stainless steel. |
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| The diagram point out the wide variety of materials that can be handled by ATB and is the demonstration of ATB capacity to adapt to client’s request over the years. |
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Hydroprocessing Reactors |
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In today’s market ATB is worldwide well known as leading manufacturer of heavy weight and high thickness reactors for hydro-processing applications.
During the more than 40 years experience, ATB has been able to adapt their fabrication technology to follow the customer’s reactors demand either in term of increasing dimensions, thickness and weight and upgrading materials requirements |
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| The evolution of thickness and weight involved in reactors manufactured by ATB since 1967 is shown in the following diagrams. |
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In today’s market, Hydrocracker Reactors standard manufacturing technology is from forged rings. However a special attention shall be paid to ATB’s capability to manufacture high thickness reactors from both rolled plates and forged ring technology.
ATB is today operating one of the most powerful rolling machine which is enabling us to roll in metallurgical cold conditions plates up to 260mm thickness. The above peculiarity provides to the various engineering companies and end users an higher manufacturing flexibility that in today’s market is a greatest added value to the traditional manufacturing capabilities. |
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| The following diagram shows the evolution of the materials in use in the factory since 1960. |
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| Hydroprocessing Reactors & Separators
manufactured by ATB from 1960 to 2004 |
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It has to be outlined that in the early sixties ATB was the first company welding 2 1/4Cr 1Mo material and that in the last years, ATB also developed the welding engineering relevant to last generation of Vanadium modified materials such as 3Cr 1Mo 1/4V and 2 1/4Cr 1Mo 1/4V.
ATB is now one of the few companies qualified in the world capable to work extensively this V modified materials. For your information ATB, up today end of Q1- 2007, has already delivered 23nr reactors made with this material while other 28nr are currently on order / under fabrications. |
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Site assembly |
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The combination of continuously increasing vessels size/weight with the location of refineries and petrochemical plants makes today more difficult to transport heavy and large equipment to the destination plant.
Therefore it is today a common situation to be requested to manufacture the reactors/vessels in sections in shop for an assembly to be made at site
In consideration of the above need but without having a dedicated site works divisions, ATB is today one of the company experienced in making such site assembly of pressure vessels.
To this purpose we point out our experience made in the 90’s in supervising site assembly of several Acrilonitrile Reactors in Chine for Tecnimont and of FCC Reactor/Regenerator unit in ExxonMobil Sriracha, Thailand refinery.
The above experience has further improved in the recent years and in 2002 ATB made the site assembly of a V modified material hydro-processing reactor at PEMEX. Tula refinery, Mexico,.
The challenge is today continuing as we are currently involved in two major projects that requires reactors assembly at AGIP S.Nazzaro Refinery, Italy and Flying J Inc. Refinery Bakersfield Ca, Usa.
However the above business shall be considered an appendix to the reactors shop fabrication only and therefore all details conditions shall be carefully agreed so that maximum support shall be provided at site by end users and engineering companies |
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| © Copyright 2007 - ATB Riva Calzoni SpA - All rights reserved |
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