The key area of expertise of SAM Stahlturm- & Apparatebau GmbH is the welding-based manufacturing and production of heavy steel construction components such as steel towers for wind energy plants, steel bridges, components for the cement and minerals industry, pressure pipelines, lock gates and other similar component assemblies.

When executing these projects, we use a number of different manual, fully/part-mechanised and automatic welding methods and a variety of welding technologies.

We have passed the welding procedure tests and obtained the necessary certificates in accordance with the applicable standards for all of the welding methods used. Our welders have all achieved the welder and operator qualifications required for our welding methods. You can find evidence of our qualifications here.

Submerged arc welding (SAW) is a high-performance welding method that SAM uses to weld not only longitudinal and circumferential seams but also long and large cross sections. It delivers stable and reproducible welding results in welding positions PA and PB.
For this method, SAW welding machine technology is used with welding gantries, welding manipulators, equipment carriers with motor-driven axis systems or adapted on trolleys. At SAM, our SAW procedures use different processes, namely single, tandem and tandem-single + ICE welding.

In metal active gas welding (MAG), the heat source is a welding arc that burns between a weld material that is continuously fed into the system and the base material and is protected from atmospheric contamination from the ambient air by a shielding gas. MAG welding uses solid wire electrodes (135), flux-cored wire electrodes (136) or flux-cored wire electrodes filled with metallic powders (138) and is suitable for all welding positions. When using MAG welding to weld unalloyed, low-alloy and high-alloy steel, we rely on active shielding gases (CO₂, Ar/CO₂ blends, Ar/O₂ blends and multicomponent gases). The main characteristics of this method are the fact that it is suitable for universal use with many material groups, its high melting deposition rates and its suitability for both mechanised and automated processes.

Metal inert gas welding (MIG / 131) is a metal shielding gas welding process in which non-ferrous metals are welded using inert gases such as argon, helium and blends of the two. At our company, this process is mainly used to join aluminium or aluminium alloys, copper and other non-ferrous metals.

Manual metal arc welding (E/111) is a fusion welding process and is only carried out by hand as metal arc welding with a sheathed rod electrode. This welding process is suitable for a wide range of applications thanks to its large selection of electrodes and the fact that it can be used in all welding positions without complex protective measures, even outdoors. Manual metal arc welding can be used to weld all weldable ferrous materials, nickel and nickel alloys with sheathed rod electrodes. At SAM, this manual process is predominantly used for repair work and welding in tight spaces.

Stud welding is one of the arc pressure welding methods. At SAM, we use arc stud welding with drawn arc number 783. This process is mainly used to weld rod-shaped metal parts (studs) onto metal workpieces by means of drawn arc stud welding. Its primary area of application is steel bridge construction, but it is also suitable for use in special projects.