METAL SPRAYING WELDING TECHNOLOGY ENGINEERING STEEL CONSTRUCTION. THe Partner for

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1 DMI DRECHSLER GMBH METAL SPRAYING WELDING TECHNOLOGY ENGINEERING STEEL CONSTRUCTION THe Partner for Industry AND SHIPPING

2 Company profile DMI Drechsler Gmbh A RELIABLE PARTNER FOR SHIPPING AND INDUSTRY TWO FACTORIES AT THE EDGE OF THE HAMBURG HARBOUR DMI Drechsler GmbH is a leading company in the field of steel construction and machinery, welding and metal spraying as well as reconditioning of different engine components. We own two factories in a convenient location on the edge of the Hamburg Harbour. Factory 1 for naval technology, steel construction and welding, and factory 2 for metal spraying. With our three business divisions of metal spraying, large engine component maintenance as well as steel construction and welding, we are a reliable partner for a wide range of shipping and industrial companies. This includes naval companies, shipyards, ship dealers, construction companies, building construction and civil engineering, vehicle and machinery manufacturers, operators of factories and industrial plants and many more. SHIPPING PARTNER Within the business division of metal spraying we employ qualified specialist staff with an extensive knowledge in controlled surface coating of machine components, also with respect to special alloys. We developed several metal spraying procedures which have been certified by Germanischer Lloyd. A great number of shipping companies has made use of our extensive range of services for a long time, e.g. for short-notice reconditioning of piston rods of all engine types. If required, we are also able to deliver to you immediately in order to avoid downtimes. METAL SPRAYING WELDING TECHNOLOGY

3 Overview of DMI drechsler The business division of large engine component reconditioning is equipped with extensive machinery for high technical demands. With our reconditioning service for main engines and auxiliary engines, we supply to the worldwide shipping industry. INDUSTRY PARTNER The business division of steel construction and welding provides industrial companies with a diversified offer in reconditioning, new manufacture, repair and welding of different components. We are a certified welding specialist according to DIN class E. The works can be carried out at our factory or, due to our technically perfectly equipped service vehicle, on-site at your location by our certified welders. As an established company with more than 60 years of operating activities, we were able to gather long-term experience. Our customers satisfaction is thereby always most important to us. This is why we only apply innovative and efficient technologies for all our developments and processes, which provide sustainability and a high customer benefit. We are the partner for shipping and industry. Certified welding specialists according to DIN , including: cranes DIN 15018, welded steel road bridges DIN 18809, hydraulic steel constructions DIN 19704, hollow section supporting framework DIN Special welding certificates for highquality steel: certification according to DIN class E, certification even includes fine-grained steel S 690 (major welding certificate) Our welding and metal spraying procedures are certified by Germanischer Lloyd Two factories on the edge of the Hamburg Harbour Exchange warehouse for piston rods Short delivery times and transportation service for piston rods Individual manufacture according to drawings resp. samples Extensive machinery Own vehicle fleet: lorries and service vehicles with technical equipment Flexible on-site fields of application (construction site service) ENGINEERING STEEL CONSTRUCTION

4 Industry / Shipping OUR METAL SPRAYING PLANT WITH CERTIFIED METAL SPRAYING PROCEDURES MAINTENANCE OF PISTON RODS FOR LONG OPERATING LIVES broken piston rod With their procedure, which was licenced by Sulzer in 1993, DMI Drechsler reworked more than piston rods for 2-stroke marine diesel engines and plants. The largest part of the reconditioning work includes different types, such as Sulzer, B & W and Mitsubishi. Within the last two decades we constantly further developed our procedures and we are able to offer reconditioned piston rods with running times of more than 45,000 operating hours without any measurable wear and tear. SHORT DELIVERY TIMES AND TRANSPORTATION SERVICE Different exchange piston rods are available for immediate dispatch. The delivery time for piston rods is 1 week only if required, we also deliver within a few days. We are happy to organise the collection and return of your machine parts with our own service vehicle. COMBUSTION WIRE SPRAYING The wire or rod-shaped spraying additive is continually melted in a fuel gas-oxygen flame and hurled onto the work piece surface by using only the fuel gas resp. with the additional help of spraying gas, such as compressed air or nitrogen. When it impinges and solidifies, mechanical anchoring and diffusion zones are developed. POWDER FLAME SPRAYING During powder flame spraying the continuously added powder-like spraying additive is pre-melted and melted in an acetylene-oxygen flame. It is sprayed onto the prepared work piece surface, accelerated by the expanded fuel gases. This method is applied e.g. for chemical resistance sockets, roller table rolls, bearing seats, ventilators, rotors of extruder screws etc.

5 OUR RANGE OF SERVICES polished piston rod OUR METAL SPRAYING PROCEDURES During metal spraying the melted spray additives are mostly sprayed by using compressed air, but also other spraying gases or gas flow from the heat source. The parts meet the substrate surface with a very high kinetic energy, they are deformed and the material to be sprayed is quickly cooled down on the relatively cold substrate. This results in a layer made of metal, oxides and very small intermediate spaces. ADVANTAGES OF THERMAL SPRAYING Almost any material can be coated/ sprayed The metal to be coated is not thermally changed Almost any component size (independent of the basic material) can be coated Excellent automation of the thermal spraying process Flexible operation High dimension accuracy High quality standard Several elements are contained within the spraying layer and can be combined (e.g. Cr, Ni, carbides etc.) GL CERTIFICATION DMI Drechsler is certified in metal spraying of piston rods by Germanischer Lloyd. Reconditioning of piston rods, spindles, different shaft types Rotors and bearing plates of E-engines and pumps Water guiding jackets HVOF coating of exhaust gas valve stems Ceramic coating of shaft sleeves on stern tube seals Repair of shrunk bearing and sealing as well as various shaft drilling Ceramic coating on E-engines for insulation purposes Hard coating of shaft protection sleeves in pump construction Corrosion-resistant coating of defect or new hydraulic piston rods Wear-resistant coating of rotors and casing on rotary valves Repair of machine parts by restoring the tolerance values Wear protection ARC SPRAYING During arc spraying two wire-shaped spraying additives of the same or different type are melted within an arc. The arc burns solidly between the two wires which are polarised as anode and cathode. The melted metal particles are hurled onto the prepared work piece surface at approx. 120 m/s by using spraying gas. This method is applied e.g. for extensive coating of components, wear and corrosion protection etc. At DMI Drechsler this procedure is also used for wear-resistant coating of piston rods. HIGH-SPEED FLAME SPRAYING (HVOF) During high-speed flame spraying the gas is continuously burned at a high pressure within a combustion chamber. The powder-type spraying additive is axially or radially added to the central axis of this combustion chamber. Due to the pressure of the fuel gas-oxygen mixture created within the combustion chamber, a high flow velocity of more than 750 m/s (supersonic) is developed within the gas jet. With this procedure we achieve extremely thin layers with high dimension accuracy. This method is applied e.g. for sliding surfaces, hydraulic rods, rollers, parts for petrochemical and chemical machines, e.g. pumps, slides, ball valves, mechanical seals, valve stems etc.

6 Shipping OUR RANGE OF SERVICES Reconditioning of cylinder covers for large diesel engines, including restoration of cracks and hardfacing in the area of fuel injectors Reconditioning of exhaust valve spindles and seats Repair of exhaust valve housings Repair of piston crowns for 2 - and 4-stroke engines of cast steel, aluminum and cast iron Repair of piston skirts to renew the BZ-rings and contact surfaces Repair of turbocharger casings Adjustment of liners in their power range Repair of pumps: shafts, wear rings and housing repairs E-Motors: Rotors and shields Machining of propeller hub according to manufacturer specifications RECONDITIONING OF LARGE ENGINE COMPONENTS COMPREHENSIVE SERVICE BY EXPERIENCED TECHNICIANS Our service offer comprises a wide range in the reworking of naval diesel engine components such as piston rods, piston crowns, piston skirts, cylinder covers, exhaust valves and valve seats, valve housings, turbocharger casings etc. Reconditioning OF CYLINDER COVER Equipped with extensive machinery as well as technicians with long-term experience, we are able to provide you with individual suggestions for your repair works after careful inspection. Repair of container gantries Hardfacing of wire shredders

7 Industry Steel engineering and WElding technology We offer extensive services to industrial companies with respect to reconditioning and repair of steel construction and machine parts. We manufacture individual steel constructions according to your wishes based on samples and drawings. We are able to repair deformed steel construction parts using cold and heat straightening, or we produce new parts according to sample. CERTIFIED WELDING SPECIALISTS We are welding specialists certified by the GSI SLV Nord according to DIN and hold special welding certificates for high-quality steel certified according to DIN , class 7, certification even includes fine-grained steel S 690 (major welding certificate). SURFACE WELDING AT THE FACTORY OR ON-SITE We offer wear-resistant deposit welding up to 55 HRC and mechanical processing of various components. Our certified welders will be available to give advice and carry out welding and steel repairs at our factory or on-site at your location with our perfectly equipped workshop vehicles. Take advantage of our extensive on-call service resp. our individually designed service agreements, and profit from the flexibility of deposit welding. Your advantages: Direct cost saving by means of service life extension Reduction of production plant downtime Wear-resistant hard deposit welding for optimisation of machine production, product quality and a longer service life OUR RANGE OF SERVICES Repair of telescopic cranes, construction cranes (also on-site) Repair of high-bay warehouse systems Repair of forklifts, van carriers, read stackers Repair of container gantries Steel construction for the building industry (on-site) Repair of construction vehicles, concrete mixers, semitrailers, swap trailers Repair of drive components in conveying systems (malt houses, grain silos) Wear-resistant hardfacing of wire shredders, granulators and recycling system components Repair of crushing plants (asphalt, concrete, wood industry) New construction of machine components according to drawings and samples Special machinery Repair with mobile drills Low-stress glowing at our own annealing furnace Repair of crane segments Mobile processing

8 METAL SPRAYING PLANT WITH CERTIFIED METAL SPRAYING PROCEDURES Reconditioning OF LARGE ENGINE COMPONENTS Steel engineering and welding technology ENGINEERING: Reconditioning and repair DMI Wolfgang Drechsler GmbH Hohe-Schaar-Straße D Hamburg Phone: +49 (0) Fax: +49 (0) Internet: