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NDT INTEGRITY & INSPECTION SERVICES


CONCRETE INSPECTION & CORE SAMPLING


Deterioration of concrete structures can become a real challenge for the owners and cost significant amounts in remediation and repair if not identified and dealt with early. Abseil Access provides comprehensive inspection of concrete structures providing detailed reports to enable our clients to proactively manage the integrity of their asset or structure.

When combined with the group’s inspection pedigree, access services, and maintenance capabilities, Abseil Access can provide safe, high-quality, and cost-effective inspection solutions for structural concrete across a range of assets such as bridges, tunnels, civil infrastructure, and hydroelectric power plants. Our services include:


  • Project Planning & Management
  • Specialist & Rope Access Services
  • Unmanned Aerial Vehicle (UAV) Inspection
  • Concrete Inspection and Testing
  • Concrete Core Sampling
  • Bridge Structural Inspections
  • Damn and Spillway Concrete Inspection
  • Post Event Inspection
  • Dust Samples for Carbonation Analysis

COATING & CORROSION INSPECTION


Coatings are comprised of a complex mixture of raw materials applied to various substrates, to provide protection from the elements and other environmental factors that breakdown the substrates integrity causing corrosion and degradation. The Abseil Access coating inspection and maintenance services help ensure the continued protection of your asset and enable remediation campaigns to prolong the life of your asset to save cost and improve safety. Some of the Abseil Access coating inspection and complimentary services include:


  • Specialist & Rope Access Inspection
  • Unmanned Aerial Vehicle (UAV) Inspection
  • Coating Condition Surveying
  • Corrosion Assessment & Surveying
  • Dry Film (Coating) Thickness Testing
  • Holiday Testing
  • RH, Dewpoint & Temperature Testing
  • Non-Destructive Testing (NDT)
  • Remote Digital Visual Inspection (RDVI)

HEIGHT SAFETY SYSTEM INSPECTION


Investigations by the Ministry of Business, Innovation and Employment into falls while working at height show that more than 50 percent of falls are from less than three meters and approximately 70 percent of falls are from ladders and roofs. The cost of these falls is estimated to be on average, $24 million a year. Abseil Access provide inspection, servicing and certification of fall protection solutions and height safety equipment, including fall arrest systems, static lines, roof guardrails, access ladders, roof walkway systems, walkway systems and grating to ensure the highest standards in the protection of our customers staff and contractors.


  • Rope Access and Specialist Access
  • Area Inspections & Consultancy
  • Fall Protection System Inspection & Certification
  • Eyebolt Installation and Testing
  • Static Line Inspection
  • Fall Arrest Equipment Inspection
  • Access System Inspection (Ladders & Guardrails)
  • Non Destructive Testing (NDT)

NON-DESTRUCTIVE TESTING (NDT)

Safety, reliability, environmental requirements, and regulations all mean that companies across most sectors have a responsibility to maintain the integrity of their equipment. Abseil Access and our sister company Vertech NZ specialise in the delivery of a wide array of conventional NDT methods from planning campaigns, advising clients on NDT methods, and providing recommendation & solutions to ensure code compliance to both international and NZ Standards. Some of our group’s NDT and complimentary services include:


  • Ultrasonic Inspection (UT)
  • Magnetic Particle Inspection (MPI)
  • Dye Penetrant Inspection (DPI)
  • Eddy Current Inspection (ECI)
  • Corrosion Mapping (C-Scan)
  • Time of Flight Diffraction (TOFD)
  • Phased Array Inspection (PA)
  • Pulsed Eddy Current (PEC)
  • Positive Material Identification (PMI)
  • Rope Access NDT Services

REMOTE DIGITAL VISUAL INSPECTION (RDVI)

RDVI is the use and application of Remote Digital Visual Inspection systems to inspect equipment without the need for Confined Space Entry (CSE) or working at height. RDVI methods are ideal for in-service inspections, conditional assessment, process efficiency assessments, and the removal or retrieval of debris & foreign objects in a variety of systems.

Our sister company Vertech NZ is the leading provider of RDVI services nationally providing the latest generation of Camera systems, Unmanned aerial vehicles (UAV’s) and crawlers. Some of our groups RDVI services include:


  • Operational Planning & Review
  • Specialised Site Execution
  • Foreign Object Search & Retrieval (FOSAR)
  • Conditional Monitoring
  • QA/QC Inspection
  • Coating and Corrosion Surveys
  • Concrete Inspection
  • Unmanned Aerial Vehicle (UAV) Inspection
  • Confined Space Structural Inspections

PROJECT EXAMPLES

CAPE FOULWIND CEMENT PLANT INSPECTION

Abseil Access Ltd were contracted to inspect the 4 cement storage silos, 3 chimneys and 5 water storage silos using rope access and specialist access systems. The chimneys are 50m and the silos up to 40m high. Spall sites were marked, measured, and recorded. Serious concrete deterioration at the top of two of the chimneys resulted in removal of 1.5m of concrete and brick lining. This required installing a temporary upper platform, scaffold and crane lifting operations. The inspection of cement and water storage silos was followed with a full repair programme for all spall sites.

MANAPOURI PENSTOCK INSPECTION

Manapouri hydro-electric power station has seven 200m vertical penstocks to feed the underground turbines. Abseil Access have developed a turnkey access solution to inspecting the penstocks. The 7 penstocks received an initial concrete condition which included core samples and detailed mapping. The work included access and rescue planning, general/close visual inspection, condition reporting, core sampling, concrete condition mapping and erosion monitoring. Abseil Access prides itself in providing the best access and inspection solution to hydroelectricity stations across the country.

BRIDGE 19 INSPECTION & MAINTENANCE

Abseil access were engaged to complete detailed rope access “find and fix” on bridge 19 which is located on the Midland line of the South Island in Springfield. This 6-month campaign included Close Visual Inspection (CVI), treatment, and re-installation of all accessible hold down bolts. The principal maintenance repairs included replacing bolts, damaged structural members, coating touch ups removal of 400m of rail system material from the lower chord, replacement of all loose rivets, corrosion treatment between plates and cleaning and greasing of bridge bearings.

HAWERA DAIRY PLANT SS DRIER INSPECTION

Abseil Access provide rope access services across the dairy industry. NZMP in Hawera had 8 stainless steel driers which required full surface crack detection and weld repairs. The project required strict hygiene requirements, confined space entry (CSE), NDT, welding, and rope access to be delivered within short shut down periods. To achieve full coverage of the 15-meter internal circumference, Abseil Access utilised our aluminium telescopic modular truss boom. Inspectors worked in pairs delivering an exceptional result to all inspection and repairs. Cyclones, ring driers, ducting and silos are also inspected.

MATAHINA DAM CONCRETE CONDITION SURVEY

Abseil Access was engaged to conduct Trustpowers periodic Spillway concrete condition inspection at the Matahina Dam. The work had to be completed in a set timeframe to minimize the exposure risk of any flooding event. The requirement to vacate the spillway within 15min was another challenge that had to be managed. The project consisted of rope access, visual inspection and photographic reporting, assisting Riley Consultant Engineers with access, assisting Southern Geophysical to conduct impulse response testing to detect subsurface defects in the concrete.

TIWAI POINT, CONCRETE STACK INSPECTION

Producing aluminium at 98.98% grade of purity, the 146m main chimney stack at Tiwai Point Invercargill is the centrepiece of the NZ aluminium smelter. The concrete chimney requires regular inspection, and maintenance tasks which can only be performed by rope access. Abseil Access have provided inspection and repairs for NZAS since 2002. This project included rope/specialist access, concrete structure inspection, concrete coverage survey, safe removal of spalling material, concrete repairs and conduit install. Our equipment and methodology minimised weather impacts enabling completion in 10 days.

WHEAO HYDRO STATION COATING INSPECTION

Abseil Access provided a coatings and corrosion survey followed by repairs to the interior steel surface of the twin penstocks.

The penstocks drop 170m down a steep slope to feed the main turbines. Due to operational requirements the project had to be completed within 5 days. All corrosion sites were recorded with adhesion and DFT testing completed. Work began immediately on the corrosion sites working to ST2. All sites had high build epoxy applied to a Altex specification.

MAJESTIC BUILDING SCULPTURE INSPECTION

The “Majestic Earth” sculpture by renowned NZ artist Neil Dawson is suspended above the main atrium of the Majestic Centre, Wellington. Following a failure of the support system in 2010, we have been conducting annual Close Visual Inspections (CVI) of the sculpture and its attachment points, providing an accurate and detailed condition monitoring program of these anchors, cables and fittings The scope includes Developing an access, rescue, and general public access control plan and detailed visual inspection reports for comparable results.