Selected single client projects carried out for the upstream sector of the Oil, Gas and Chemicals industries

Safety, reliability and inspection
Consultancy support and failure investigations
Design, fabrication and repair

Safety, reliability and inspection

• Engineering critical assessment of SCR girth welds
• Fatigue performance of girth welded SCRs
• Probabilistic fatigue assessment of girth welded SCRs
• Inspection reliability of SCRs
• Fatigue of super duplex riser
• Fatigue performance of clad risers
• Variable amplitude fatigue of girth welded SCRs
• 18 Inch risers fatigue qualification testing
• Fatigue evaluation of girth welds
• Re-evaluation of fatigue curves for flush ground girth welds
• Assessment of girth welds for S-Lay
• Engineering critical assessment of failed well casing hangar
• Engineering critical assessment of racking pinions
• Engineering critical assessment of pipeline girth welds
• Analysis of socket welds
• Engineering critical assessment of riser ESD valve
• Engineering critical assessment of a girth weld in an export line
• Inspection of jack-up rig
• Qualification of welded duplex tube using digital radiography
• Engineering critical assessment of pipeline with repair grooves
• Property assessment of bolts
• Fitness for purpose of titanium alloy clamps
• Mooring support structure connection review
• Fatigue testing of coated steel pipes
• Guidelines for implementing best industry practice for NDT. Evaluation in the petroleum industry
• Engineering critical assessment of pipeline girth welds
• Analysis of cracking risk in flowlines
• Fracture and fatigue assessment of FPSO hull
• A probabilistic method for assessing brittle fracture in pressure vessels
• Engineering critical assessment of laybarge girth welds
• Engineering critical assessment of Ti riser
• Risk analysis of flowline cracking
• Re-use of flowlines by re-reeling
• Engineering critical assessment of gas choke valve
• Engineering critical assessment of cracked column in semi-submersible rig
• FE analysis and burst pressure test of pipe
• Effect of prestrain on fatigue of SCRs
• Assessment of corroded nozzles
• Instrumentation and monitoring of a pig-receiver
• Engineering critical assessment of upheaval buckles in subsea pipeline
• P-scan inspection of riser welds
• Ultrasonic NDT procedure for super duplex pipe
• Fatigue performance of GRE caissons
• Engineering critical assessment of co-axial pipework
• Engineering critical assessment of pipeline during local freezing
• Toughness of 22%Cr duplex SS water injection riser
• Effect of sigma phase in super-duplex stainless steel pipe welds
• Flaw analysis for pipeline manifold
• Flaw acceptance criteria for hyperbaric welds
• In situ ultrasonic testing of bolts
• Fitness for purpose assessment of separator vessel
• Monitoring fatigue crack growth in crane pedestal
• Fatigue analysis of caisson
• Assessment of the integrity of an anchor chain
• Fracture toughness of hyperbaric welds
• Fitness for purpose analysis of Aleyaska pipeline

Consultancy support and failure investigations

• Fatigue of threaded couplings
• Course on fatigue of pipe girth welds
• Examination of supermartensitic stainless steel coupling
• Assessment of cracking in a submerged arc weld in ABS grade A steel
• Investigation of freshwater pitting corrosion of copper pipework
• Bolt failure analysis
• Examination of fractured chain link
• X80 pipe girth weld micro tensile tests
• Underwater cutting process & recovery
• Weld repair of offshore platform
• Failure investigation of flame sprayed aluminium coating in process specific sulphur removal unit
• Expert witness support
• Investigation of failed impellor
• Investigation of failed winch wire
• Pipeline remnant life assessment
• Failure of anchor chain
• Corrosion of duplex stainless steel firewater pipe
• Leaks in superduplex stainless steel umbilical
• Cracking of crane slewing ring bolts
• Weld metal hydrogen cracking in gas plant piping
• Jack-up barge leg failure
• Failure of condensate pump stud bolts
• Corrosion of C steel in sweet service
• Hydrogen cracking due to CP of duplex SS forged manifold
• Hydrophone failure analysis
• Cracking in horizontal braces of semi-submersible rig
• Platform abandonement
• Life extension of jack-ups
• Consultancy on FPSO subsea development
• Fatigue life extension of floating structures
• Failure investigation on the thermoplastic layer of flexible riser
• Material selection for thermoplastic liner on water injection line
• Fracture of fret wires from a flexible riser
• Life extension of semi-submersible drilling units
• Titanium for offshore applications - material characterisation
• Engineering critical assessment of damaged pipelines
• Assessment of failed aluminium gangway
• Materials characterisation for TLP tethers
• Corrosion failure of flexible hose
• Fire pump riser spool failure
• Corrosion failures of feed water valve studs
• 3rd party assessment of pipeline welds
• Cracking in a pipe flange joint
• Failure analysis of drill pipe
• Pitting/crevice corrosion in alloy 625 and alloy 825 cladding
• Corrosion of welds in low alloy steels
• Fatigue assessment of free span in gas pipeline
• Fatigue analysis of cracked pipeline welds
• Spud can/chord cracking in jack-up rig
• Review of specifications for a TLP
• Acceptability of weld metals containing nickel
• Failure stresses in badly pitted tubes
• Failure of lattice boom crane
• Sulphide stress corrosion cracking in seamless pipe
• Failure in a flare stack
• Preferential weld metal corrosion in flowline
• Examination of wet underwater welds

Design, fabrication and repair

• HIC testing of spiral welded line pipe
• Bend testing of alloy 718 tubing hanger material
• Investigation of variable weld metal toughness
• ECA of reeled pipeline girth welds
• Fracture toughness testing of ship plate
• Materials testing and ECA of reeled and S-lay pipeline girth welds
• Weldability testing of X65 linepipe and bend materials
• Weldability testing of X60 linepipe
• Weldability testing of 13Cr X80 supermartensitic stainless steel linepipe using a manual GTAW procedure and matching filler metal
• Manufacture of girth welds with copper contamination defects
• Weldability testing of line pipe (several projects)
• Production and qualification testing of automatic GMA welds in weldable 13G sour grade 12 inch pipe
• The welding of 100ksi yield strength plate materials
• Repair of semi-submersible production unit
• Laser welding of drill casings
• EB welding system for offshore pipelining
• Offshore pipeline welding qualification
• Recommendations for welding pipelines for sour service
• PWHT and hardness of riser elbow
• Welding processes for gas pipeline repair
• Avoidance of PWHT in process pipework
• Semi-submersible rig conversion
• Prototype EB welding system for J configuration pipe-lay
• Underwater repair by friction stitch welding
• Mechanical testing of GRE pipes
• High-productivity welding of polyethylene gas pipe
• Repair of water injection manifolds
• Mechanical properties of GRE caissons
• Weld procedure assessment for butt fusion welds
• Simulation of a hot tap weld
• Fatigue design of tether for a TLP
• Topside process system weld checks
• Radial friction welding of down hole tubulars
• Pitting in ferric chloride of 25%Cr duplex stainless steel
• Cracking in hyperbaric repair welds
• Butt fusion welding of polyethylene pipe
• Weldability of new polyethylene pipe
• Economic feasibility of thermoplastic lined steel pipe
• Mechanised MIG welding of C and duplex SS pipelines
• Friction stud welding onto pressurised pipes
• ERW pipe for offshore use, tests and specification
• Review of pig trap welding standards
• Friction stitch repair of window closure welds
• Consultancy and repair of sub-sea pipeline
• Underwater friction welding trials