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August 2017
AFRICAN FUSION
1
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
Bedfordview 2008
Tel:
(011) 622 4770
Fax:
(011) 615 6108
Editor:
Peter Middleton
E-mail:
peterm@crown.co.zaAdvertising:
Helen Couvaras
E-mail:
helencou@crown.co.zaPublisher:
Karen Grant
Deputy publisher:
Wilhelm du Plessis
Cover design:
Afrox
Production & layout:
Darryl James
Circulation:
Karen Smith
Printed by:
Tandym Print, Cape
August 2017
Contents
www.africanfusionmagazine.co.zaNew 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
4
10
16
32
22
FEATURES
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. 10 High-quality electroslag strip cladding for alloy 625 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. 28 Cost-effective welding solutions: a tiered approach 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