African Fusion June 2016

Contents

June 2016

FEATURES 4 SAIW emerges as a self-sustaining organisation African Fusion summarises the 2015/2016 AGM reports for SAIW and SAIW Certification, which were both presented by current SAIW president, Morris Maroga. 6 Transnet Engineering: the first CL 1-certified rail fabricator in Africa African Fusion visits Transnet Engineering’s EN 15085-certified Durban facility and talks to welding engineers, Rodwell Baloyi (IWE) and Dhurusha Govender, along with Collin Moopanar, the executive manager of R&D mechanical. 14 The alform welding system, a world first This paper, delivered at the 2015 IIW International Conference in Helsinki, Finland last year by specialists fromboth voestalpineBöhlerWelding and voestalpine Stahl, describes a newapproach to base material andwelding consumable development that aims to optimise their combinations for fabrication. 20 High-strength materials – challenges and applications Our second IIW paper for this issue, also delivered in Helsinki, studies the narrow gap gas metal arc welding (GMAW) of S890QL steel. 24 Self-shielded flux-cored wires: the on-site alternative to stick-electrodes African Fusion talks to Renttech’s Johan Bester about self-shielded flux-cored wires, which can be an ideal substitute for shielded metal arc/stick electrode welding for on-site construction projects. 26 Cobalt-based cladding: a local success story Wiehan Zylstra, technical manager with the Welding Alloys South Africa, (WASA) presents a case study on the use of Welding Alloys’ cobalt-based cladding material, STELLOY 6-G, which was welded out of position using Fronius’ TPS synergic pulsed-GMAW equipment. 28 Welding fume extraction and filtration At an SAIWeveningmeeting earlier this year, Jacques Cato talkedaboutwelding fume, filtration technology and the solutions available fromDonaldsonFiltration Solutions in South Africa. REGULARS 3 Sean’s comment 8 SAIW bulletin board 12 Front cover story: SA’s first onshore helium and natural gas field 31 Welding and cutting forum 36 Today’s technology: Polysoude TIG er technology

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Editor: Peter Middleton E-mail: mechanical@crown.co.za Advertising: Norman Welthagen E-mail: normanw@crown.co.za Publisher: Karen Grant Deputy publisher: Wilhelm du Plessis Cover design: Afrox Production & layout: Darryl James Circulation: Karen Pearson Subscriptions: Wendy Charles Printed by: Tandym Print

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On May 4, 2016, The Linde Group; its African subsidiary, Afrox; and alternative energy company Renergen Limited – through its subsidiary TETRA 4 – signed an historic agreement for the commercialisation of the Free State Helium and Natural Gas field. African Fu- sion attends and talks toNazmi Adams Afrox general manager of sales and marketing.

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June 2016

AFRICAN FUSION