Isinyithi Electrical Protection

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Our Projects
INTERFERENCE MITIGATION (AC & DC INTERFERENCE)
Project Description Client Date Value
AC Mitigation for Mavambe to Vuwani Potable Bulk Distribution Pipe Planning assistance, detailed supervision & commissioning of the AC mitigation measures for the steel pipe 800mm dia for 31.6km long installed from Mavambe to Vuwani. The Cahora Bassa DC Powerline is close to this pipeline as well as a few high voltage overhead powerlines, as well as close-by electrical sub-stations. This requires AC mitigation measures for the whole pipeline. Retrofitting some chambers with AC mitigation measures formed part of the project. Dept of Water & Sanitation 2012 - 2013 R1.3m
AC Mitigation for Nandoni Dam Bulk Pipes to Vondo Areas Planning assistance, detailed supervision & commissioning of the AC mitigation measures for the Thohoyandou pipe to NR6 reservoir a 700mm diameter. This pipe crosses an verhead high voltage AC powerline and AC mitigation measures were applied to a short section around this intersecting area. Dept of Water & Sanitation 2012 - 2013 R2.5m
AC Mitigation for Nandoni Pipe Section Vuwani to Valdezia Command Reservoir Planning assistance, detailed supervision & commissioning of the AC mitigation measures for the steel pipe 900mm dia for 30.2km long installed in the Makhado LM area in Vhembe District. Some high voltage overhead wires cross the pipe and also run parallel to the pipe for short distances. Dept of Water & Sanitation 2013 - 2015 R0.9m
AC Mitigation for Piet-se-Kop to Sekuruwe Raw Water Pipeline Planning assistance, tender documentation, detailed supervision & commissioning of AC mitigation system for steel pipe 1000mm dia for 15.2km from Mokopane to Sekuruwe. There are high voltage overhead lines that affect this pipeline and AC mitigation measures are required. The new mining development would require additional overhead high voltage powerlines which were incorporated already in the designs. Cross bonding to two adjacent steel pipes form part of the mitigation measures. Mogalakwena Municipality 2014 - 2017 R3.5m
AC Mitigation for Makhado West Potable Bulk Pipe : Valdezia to Louis Trichardt Planning assistance, tender documentation, detailed supervision & commissioning of an AC mitigation system system for the Valdezia Reservoir to Mowkop Reservoir bulk potable pipe which consists of a steel pipe 800mm dia 17km long and a pumping main 700mm dia 13.1km long. This is an extension of the Nandoni Dam water supply to Mahado and Sinthimule/Kutama areas. Dept of Water & Sanitation 2014 - current TBD
AC Mitigation for Vuwani to Majosi Steel Pipeline Planning, design and implementation of an AC mitigation system for the Vuwani to Majosi bulk potable pipe which is a steel pipe 800mm dia approx 20km long. The pipe runs parallel to and crosses some high voltage overhead pipelines. Vhembe District Municipality 2015 R2.0m
AC Interference Mitigation for Mogalakwena 800mm dia Potable Steel Link Pipe Planning, design and implementation of an AC interference mitigation system for the Mokopane High to Piet-se-Kop 800mm dia steel pipeline 3.6km long. The pipe runs parallel to and crosses an overhead 132 kV electrical powrline. Excessive steady state touch potentials (up to 23 Vac) and very high fault level induced potentials were effectively mitigated with Zinc ribbons and strategically placed Zinc mat grounding. Mogalakwena Local Municipality 2016 - 2018 R1.0m
M12 Steel Pipe ACIM AC interference and mitigation design & specification for the M12 (M2 replacement) Servaas to Nigel 13km large diameter steel pipe. This pipe system is co-located with more than 5 transmission and distribution powerlines requiring mitigation with a continuous zinc ribbon. Rand Water 2018-2020 R0.75m Fees
ACIM for Moretele South Bulk Water Phase 1 Pipe AC interference evaluation and design for the Moretele South Bulk Water Phase 1 pipee. This 750mm dia steel pipe is 6.2km long and co-located with a 132kV powerline. Mitigation measures by sectional zinc ribbon and equipotential planes at structures. Magalies Water 2018-2020 R0.2m Fees
Empangeni Potable Pipe ACIM Nsezi Water Treatment Works to Empangeni potable pipe AC mitigation evaluation, design and specification. The 12km long pipe consists of 800mm to 450mm dia coated steel pipe with more than 11 HV overhead powerlines closely co-located, other CP protected steel pipes, sub-stations and railway lines in the vicinity. Special design measures for 1.2km section situated above ground. Mhlathuze Water 2019-2020 R0.75m Fees
MCWAP Phase 2 ACIM Mokolo Crocodile Water Augmentation Project MCWAP (Phase 2) – steel pipe system 136km long with diameters up to 1600mm. Investigation and design of mitigation systemes for AC induced interference on the pipeline co-located close to numerous 400kV overhead powerlines from Medupi and Matimba power stations. An integrated system with ACIM zinc ribbons and a sacrificial zinc anode system was developed with ICP. TCTA 2019-2021 tbd
Mhlathuze Weir to Nsezi WTW Raw Water ACIM AC interference design for Mhlathuze Weir to Nsezi Water Treatment Works raw water pipe system consisting of 13km 1200mm dia steel pipe with 4km of new 1500mm dia steel pipe. AC mitigation for more than 10 HV closely co-located overhead powerlines, other CP protected steel pipes, sub-stations and railway lines in the vicinity. Mhlathuze Water 2020-2021 R0.8m Fees
ANCILLARY STUDIES / INVESTIGATIONS
Project Description Client Date Value
Insulating and Bonding of the Levubu Govt River Water System (Nandoni Dam) The cathodic protection for the following five welded steel pipes of the Nandoni Dam bulk distribution system required that the pipes are electrically isolated from the pipe/building components that they are connected to (at start and at the end points) and that the steel pipes within the reservoir and pumping station sites are protected. The continuously welded pipes which are connected to pumping stations and reservoirs which have their own earthing systems are: • NN20B 200mm dia steel pie for 10km, • Lambani pipe 250mm dia steel pipe for 8km, • Thohoyandou pipe to NR6 reservoir a 700mm diameter for 19km, • Mavambe to Vuwani pipe 800mm dia for 32km, and • Vuwani to Valdezia pipe 900mm for 30km Dept of Water & Sanitation 2014 R0.5m
Accelerated corrosion investigation Investigation into accelerated corrosion (rust) on a section of steel pipe that is part of the Pilansberg water supply system. Pipe Fittings Inspectorate 2016 -
CP and ACIM Scoping Overview for Lebalelo Water User Association A scoping overview of the current CP system and potential AC interference issues for the bulk water supply pipeline system comprising of 133km of steel pipes. This initial overview is a first step toward the documenting an overview of the CP system and evaluating the likelihood of AC interference issues. Lebalelo Water User Association 2020 R0.03m Fees
CATHODIC PROTECTION
Project Description Client Date Value
CP System of Weenen Groundwater Wellfield Liaison with CP designer and planning assistance for the galvanic anode CP system on the 9.8km 450mm dia steel pipe from Weenen Wellfield to Mokopane Bulk Pipe System. Mogalakwena Municipality 2011 R0.5m
CP System for Mavambe to Vuwani Potable Bulk Distribution Pipe Planning assistance, detailed supervision & commissioning of a Cathodic protection (CP) for a steel pipe 800mm dia for 31.6km long installed in the Makhado and Thulamela LM areas in Vhembe District. An ICCP system was required and is managed by 3x sets of anode goundbed systems. Monitoring points and test posts are supplied. The Cahora Bassa DC Powerline is close to this pipeline as well as a few high voltage overhead powerlines and this requires AC and DC mitigation measures for the whole pipeline. Temporary sacrificial anodes were installed in critical places for CP protection during construction. Dept of Water & Sanitation 2012 - 2013 R2.1m
CP System for Lukalo –Lambani Pipe Planning assistance, tender documentation, detailed supervision & commissioning of a Cathodic protection (CP) system for the Lambani pipe 250mm dia steel pipe for 8km comprising of 1x ICCP system, temporary SACP and monitoring points. Dept of Water & Sanitation 2012 - 2013 R1.2m
CP System for Nandoni Dam Bulk Pipes to Vondo Areas Planning assistance, tender documentation, detailed supervision & commissioning of a Cathodic protection (CP) system for the following two welded steel pipes comprising of 3x ICCP systems, temporary SACP and monitoring points. The two of the systems are bonded together as the pipes run parallel for some distance. The pipe sections are: • NN20B 200mm dia steel pipe for 10km, • Thohoyandou pipe to NR6 reservoir a 700mm diameter for 19km. Dept of Water & Sanitation 2012 - 2014 R2.5m
CP System for Nandoni Pipe Section Vuwani to Valdezia Command Reservoir Planning assistance, detailed supervision & commissioning of a Cathodic protection (CP) system for a steel pipe 900mm dia for 30.2km long installed in the Makhado LM area in Vhembe District. The CP is done by a distributed SACP system with 75x sacrificial anodes all along the vulnerable pert of the pipeline. Monitoring points and test posts are supplied. Dept of Water & Sanitation 2013 - 2015 R1.8m
CP System for Makhado West Potable Bulk Pipe : Valdezia to Louis Trichardt Planning assistance, tender documentation, detailed supervision & commissioning of a Cathodic protection (CP) system for the Valdezia Reservoir to Mowkop Reservoir bulk potable pipe which consists of a steel pipe 800mm dia 17km long and a pumping main 700mm dia 13.1km long. This is an extension of the Nandoni Dam water supply to Mahado and Sinthimule/Kutama areas. Dept of Water & Sanitation 2014 - current TBD
CP System for Piet-se-Kop to Sekuruwe Raw Pipe and Sekuruwe to Fothane Potable Pipeline Planning assistance, tender documentation, detailed supervision & commissioning of a Cathodic protection (CP) system for a welded steel pipe 1000mm dia for 15.2km, 800mm dia for 5.4km, 700mm dia for 3.2km and 400/300mm dia for 6.7km. The CP system comprised of 3x ICCP stations with some temporary sacrificial anodes in areas requiring protection during construction. Mogalakwena Municipality 2014 - current R2.5m
CP System for Vuwani to Majosi Steel Pipeline Planning, design (by ICP) and implementation of a Cathodic protection (CP) system for the Vuwani to Majosi bulk potable pipe which is a steel pipe 800mm dia approx 20km long. The pipe obtains water from the Vuwani Reservoir and ends at the Nkusana Pumpstation. This pipe would form part of an existing CP system as well as a further extension thereof. Vhembe District Municipality 2015 - current TBD
SACP System for Mogalakwena Potable Link Pipe Distributed sacrificial anode system (design by ICP) for cathodic protection by means of 60m long Zinc anodes placed alongside the 800mm dia polyurethane coated steel pipe. Quotation documentation, scheduleing, construction supervision and commissioning of the system. Mogalakwena Local Municipality 2016 - 2018 R1.2m
Ga-Maphopa Pumpline CP Constrcution supervision of a deep well CP system for a 350mm dia steel pipe 3.5km long in Sekhukhune District (the design was done by CTC). Sekhukhune District Muniicpality 2018 - current R1.5m
M2 Replacement Pipe CP Design and specification of an ICCP system for the M12 (M2 replacement) Servaas to Nigel 13km large diameter steel pipe. Rand Water 2019-2020 R0.5m Fees
MONITORING OF OPERATIONAL CP & INTERFERENCE MITIGATION SYSTEMS
Project Description Client Date Value
CP System for Weenen Groundwater Wellfield Monitoring of pipe potentials and ancillary measurements required for maintaining the galvanic anode CP system on the 9.8km 450mm dia steel pipe from Weenen Wellfield to Mokopane Bulk Pipe System. Mogalakwena Municipality 2015 to current -
CP and ACIM System of Mogalakwena Potable Link PIpe Monitoring of Pipe DC and AC potentials as well as AC current drain from the pipe by means of automated loggers with GSM connectivity for viewing data and graphs on the Mokopane High to Piet-se-Kop 800mm dia steel pipe section. Mogalakwena Local Municipality 2018 - current -
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