African Fusion August 2017

Contents

August 2017

FEATURES

Published four times a year and mailed out together with MechChem Africa by: Crown Publications cc Crown House Cnr Theunis and Sovereign Streets Bedford Gardens 2007 PO Box 140

4 SA goes for World Skills Welding gold On August 4 at Lincoln Electric SA’s Weld Tech Centre in Midrand, the Chemical Industries Education and Training Authority (CHIETA) held an event to send off South Africa’s welding champion to the 2017 World Skills International Competition. 6 SAIW’s expanded technical services African Fusion visits SAIW’s Material Testing Laboratory and talks to the Institute’s new technical services manager, Riaan Loots. Global voestalpine Böhler Welding/UTP Maintenance specialists for cladding, petrochemical and chemical processing, M Decherf, R Demuzere and F Ciccomascolo, present an advanced electroslag strip cladding process that enables thin single layer Alloy 625 deposits to be achieved that meet the iron (Fe) content requirements for the oil & gas and chemical processing industries. 16 Welding techniques and quality evaluation on zirconium-steel clad plates for large-scale reactors This paper, from the proceedings of the IIW 2017 International Conference in Shanghai China, describes the development of successful welding techniques for zirconium-clad pressure vessels and reactors. 22 How to hardface: The ten-step approach At an afternoon seminar at SAIW on July 26, Alain Laurent, business developer of consumables for Saf-Fro and Oerlikon, presented the companies hardfacing offering and its ten-steps approach to achieving optimum surface layer characteristics. 26 Creep, cracks and fitness for service Ronald Koenis, principal metallurgical engineer for MegChem, talks about fitness-for-service (FFS) and remaining life assessments (RLAs) of welded components that operate within the creep range and those with crack- like flaws. African Fusion talks to Warwick Hogan and Anthony McGuinness of Brand Weld about welding brand choices and their approach to meeting the needs of the diverse South African market. REGULARS 3 Sean’s comment 9 SAIW News 30 Welding and cutting 32 Today’s technology: PTA for the protection of power components 10 High-quality electroslag strip cladding for alloy 625 28 Cost-effective welding solutions: a tiered approach

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Editor: Peter Middleton E-mail: peterm@crown.co.za Advertising: Helen Couvaras E-mail: helencou@crown.co.za Publisher: Karen Grant Deputy publisher: Wilhelm du Plessis Cover design: Afrox Production & layout: Darryl James Circulation: Karen Smith Printed by: Tandym Print, Cape

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New electroslag strip cladding (ESSC) solutions for the single layer cladding of Alloy 625 have now been developed. They enable the deposition of single layers with reduced thicknessandallowindustry Fe dilution requirements tobemet in one single layer, where two layers would normally be necessary

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August 2017

AFRICAN FUSION