TPT May 2023

TECHNOLOGY

Improving tube quality and reducing claims ONE of the main challenges when manufacturing galvanised pipes and profiles is to avoid white rust formation during storage and transportation to the stockist or end customer.

White rust is a white, powdery substance that can form on the surface of galvanised products. This corrosion forms under certain conditions when zinc is in an environment together with hydrogen and oxygen. White rust is particularly likely to form on pipes/tubes and profiles that are packed in bundles for storage with no surface protection. Commonly the emulsion from the mill will be the catalyst of this corrosion due to the fact that it is predominantly water based. Even if the surface of the product is dry at the packing stage it will not be protected due to the fact that condensation can form due to changes in ambient temperature and/or humidity. Both will result in white rust. It is possible to prevent this and to provide protection against oxidation by applying a protective lubricant in a uniform way, covering the whole surface homogeneously. In this regard, and for 20 years, DieTronic is specialised in the production of spray systems for the automatic and controlled application of Rust Preventive Oil (RPO) on the surfaces of tubes, pipes and profiles. For tube producers the risk of product being rejected by the end customer can

Antirust spray technology and saw blade lubrication unit

be extremely costly, not to mention the damage to the reputation of a supplier. In this respect, the DieTronic Antirust product range cover different types of tube shapes (round, square, rectangular, and special profiles) and dimensions, to make the system suitable for any need. The greatest advantage of DieTronic’s solutions are that the devices are able to spray the right amount of RPO in a controlled, constant and homogenous way, covering the whole tube surface and adjusting the quantity to apply in g/ m 2 automatically and proportionally to the line speed. In this way, an effective and optimised application quality means not only a full product protection against rusting, but also a consistent saving of

trigger control and Arc Dynamics (a control to fine tune arc characterics for a crisp/stiff arc when welding carbon steel or a smooth/soft arc when welding stainless steel). Users can also program, store and recall five sets of parameters using Quick Job buttons on the front of the machine. Rustler users include those in general and industrial fabrication, structural steel fabrication, repair and maintenance applications who want a compact, integrated system that offers easy mobility around a shop environment. The machines are assembled at ESAB’s facility in Opole, Poland. RPO, which can be applied precisely and in the recommended dosages. As explained by Giovanni Amato, sales director and Founder of DieTronic Srl: “Our technology brings not only a considerable saving, which is obviously important as the reduction of wastes as well of oil used mean less costs, but also a prominent impact on the environmental side. A reduced use of rust prevention oil can be beneficial also for the working environment in tube manufacturing plants, which results in a safer place for the operators working on the machinery.” DieTronic Srl www.prodotti.dietronic.eu/wp/antirust

ESAB launches easy-to-use welders ESAB ® has introduced the first three models of its Rustler™ series of compact MIG/MAG and flux cored welders, which feature inverter technology and digital controls to improve productivity, boost quality and simplify training in industrial fabrication applications. Rustler enables users to weld with wire diameters from 0.6 to 1.6mm using the short circuit, globular and spray transfer processes, satisfying process requirements for thin and thick metals. benefits of synergy control, which saves set-up time, promotes consistency and helps less experienced welders produce optimal welds. With its modern inverter design that improves welding results and operator comfort, Rustler also meets EU Ecodesign Directives and offers customers an energy efficiency of 86 per cent to lower utility bills. Rustler replaces ESAB’s Origo™ MIG Compact welding power sources, one of the most successful MIG products in Europe for the last two decades.

The Rustler EM 280C PRO offers a MIG welding output of 280A at 40 per cent duty cycle and the Rustler EM 350C PRO offers a welding output of 350A at 40 per cent duty cycle. The Rustler EM 350C PRO Synergic also provides a 350A output and adds the

Rustler’s operator interface features two 14-segment digital displays on the front panel and advanced control functions such as spot welding mode, gas pre- and post-flow, creep start, wire burnback control, crater fill, 2T/4T

ESAB www.esab.com

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MAY 2023