🧩 RELIABLE EXECUTION

What We Do

🧩 EFFECTIVE ENGINEERING

At Sustech Engineering, we deliver practical, high-quality engineering and project management solutions across the full Project Lifecycle. From concept and design through to execution, operations, and asset integrity, we specialise in small to medium greenfield developments and complex brownfield or shutdown projects. With a multidisciplinary team and a track record across oil & gas, renewables, minerals, and utilities, we are your trusted partner for delivering results where it matters most.

🧩 PRACTICAL SOLUTIONS

Why Choose Sustech?

✅ Chartered & Experienced Multidisciplinary Team

✅ Local Expertise + Global Delivery Standards

✅ Agile, Client-Centric Approach

✅ Proven Project Track Record

✅ Integrated Engineering + Digital Capabilities

OWNER’S ENGINEERING

    • Concept study

    • Option screening study

    • Pre-feasibility study

    • Feasibility study

    • Pre-FEED

    • FEED Study

    • Technical due diligence study

    • Material selection study

    • Technical analysis for economic feasibility study

    • Project development and costing

    • Project oversight for ownership

    • Project regulatory approval support

    • Scope development and management

    • Vendor assessment and package management

    • Construction work pack preparation

    • Commissioning and decommissioning support

    • Technical writing

    • Secondment of capable engineers and project managers

    • Technical and quality assurance design review

    • Assessment of existing assets for fitness for purpose, optimum functioning and safe operations

    • Scoping modification projects aligned to existing plant operations

    • Design services and review of designed deliverables

    • Litigation support providing independent expert technical perspective

ASSET MANAGEMENT 

    • Systems engineering

    • Shutdown planning

    • Asset life cycle planning

    • Tender preparation and evaluation

    • Loss prevention review

    • Expedited fit for purpose solutions

    • Piping and pipeline reliability-integrity engineering health study

    • Residual life estimation for existing assets

    • Forensic engineering study

    • Structural analysis in Space Gass and STAADPro

    • Asset integrity, API 579, AS 3788 fitness for service engineering & study

    • Risk Based Inspection/Assessment

    • Structural Modification Engineering Design

    • Structure modelling and drafting

    • Review of existing systems and practices for gap analysis

    • Assessments using robust data collection system procedure, that can be adjusted for your specific policy and procedure:

      ·         Structural

      ·         Tank

      ·         Piping

      ·         Pressure vessels

    • Guideline and standard development for site governance

    • Remediation design and engineering support for non-compliance

    • Fitness for Service to API 579

    • Piping and pipeline reliability-integrity engineering health study including steam piping.

    • Estimation of residual life of atmospheric storage tanks

    • Structural integrity study

    • Condition monitoring

      ·         Data collection

      ·         Vibrational analysis

      ·         Maintenance notifications

      ·         Oil reports

    • Development of maintenance strategies and plan for plant and equipment

    • Systems and software tools developed to:

    • Improve efficiency

    • Reduce human error from data entry

    • Strategy development and management for:

    • Optimisation of spare holding as per risk-based management

    • Spare Criticality Identification

    • Alignment with contract strategy and optimized holding cost

    • Internal software tool systems to enable efficient management of data from ERP systems

    • Data Integrity Management

    • Data Validation/ Verification

    • Data Corrections

    • Engineering Technical Support

    • Blueprint Management

    • Engineering Documentation Stock take

    • Document Rectification/ As built

    • Change Management Procedure development

COMPLIANCE

    • Type B appliance modification regulatory gas inspection and approval management to AS 3814 

    • Gas distribution network technical safety compliance audit 

    • Design and MDR verification as per: 

      ·         Work Health and Safety (Petroleum and Geothermal Energy Operations) Regulations 2022 

      ·         Petroleum Pipelines Act 1969 

    • Regulatory technical audits for: 

      ·         Oil & gas 

      ·         Chemicals 

      ·         Mining 

      ·         Power 

      ·         Water installations 

    • Safety & risk assessment 

    • Process safety assessment 

    • Mechanical installation safety assessment 

    • Pipeline safety & risk assessment 

    • Hazardous area classification 

    • Facilitation of risk assessment, HAZID, HAZOP workshops

    • Technical & code compliance verification audits to ASME, ASCE, and AS for the following industries: 

      ·         Oil & gas 

      ·         Chemicals 

      ·         Mining 

      ·         Power 

      ·         Water installations 

    • Lift study and review

    • Pipeline re-lifing study as per AS2885 

    • Assessment of WPS/WQR as per ASME Section IX, AS 2885.2, B31.1, B31.3 

    • Pipelines as per AS 2885 

    • Power & process piping as per AS 1210/ASME Sec VIII 

    • Boiler parts as per AS 1228 

    • Storage tanks as per API 650, API 620, AS 1940, AS 1692 

    • 3rd party inspection of manufactured products, workshop fabrication, site fabrication and installation by qualified inspectors 

    • Inspection and remediation solutions for piping, pipelines, pressure vessels, storage tanks, FRP piping, and vessels 

NICHE ENGINEERING

    • Concept exploration 

    • Scale up economics assessment 

    • Evaluation of pilot results 

    • Design for compliance systems i.e environmental, waste, safety, etc 

    • Development of testing regimes to optimize larger scale success 

    • Hydrogen Generation Plant 

    • Waste to energy Plant 

    • Compressed Air Energy Storage 

    • Carbon Capture

    • Project support for provided design, procurement, and management of installation.

    • PSA to ASMEB31.1, B31.3, B31.4, AS4041, ISO14692, ASME Sec VIII 

    • Pipe stress analysis for all common materials as well as niche selections like GRE and FRP 

    • High pressure and high temperature critical power piping 

    • Complete capability of stress analysis for different process fluids (water, ammonia etc.) 

    • Full Engineering and modelling/ drafting for support & piping modification design 

    • Electrical local grid analysis & main grid connectivity analysis & troubleshooting

    • Power system modelling (i.e ETAP, DIgSilent)

    • Power system studies

    • Arc flash

    • Protection & Coordination

    • Short Circuit Calculations

    • Load Flow

    • Network/Grid reliability analysis

    • Structural analysis in Space Gass and STAADPro

    • Asset integrity, API 579, AS 3788 fitness for service engineering & study

    • Risk Based Inspection/Assessment

    • Structural Modification Engineering Design

    • Structure modelling and drafting

    • Assessment of historical operational documentation 

      ·         O&M Records

      ·         Failure records

      ·         Previous Equipment Performance assessments

    • Assessment of :

      ·         End Of Physical Life 

      ·         End Of Capacity Life

    • Integrity Assessment of Equipment for identification of replacement, upgrade or retrofitting for components

    • Residual life extension planning and scoping:

      ·         Procedures for repair/ retrofitting

      ·         Equipment selection

    • Testing regime planning (NDE, visual, etc)

    • Incident investigation

    • Program development

    • Cause mapping

    • Corrective action identification

    • Engineering for custom made solutions

    • Finite element analysis (FEA) of equipment, structures, components in NozzlePro, Solidworks, ANSYS 

      ·         Modal analysis 

      ·         Buckling Analysis 

      ·         Fatigue Analysis 

      ·         Dynamic Analysis 

      ·         Static Analysis 

    • Static equipment analysis 

      ·         Heat Exchangers 

      ·         Pressure Vessels 

      ·         Distillation Column 

      ·         Boilers 

      ·         Filters 

      ·         Heaters 

      ·         Pig receivers 

      ·         Piping 

    • Valves 

    • Reformer tube coil review, connected external steam & hot air piping, support analysis and troubleshooting

    • Turbine tripping solutions, exhaust piping and support analysis

    • Synthesis gas starts up heater analysis, spring selection, operation start up methodology development and troubleshooting

    • Hydraulic cylinder mounting bolt failure analysis

    • Mechanical equipment package engineering

DESIGN & ENGINEERING  

  • ENERGY AND GAS  

    • Gas gathering, processing, transmission, laterals, metering, pressure reduction and distribution systems design

    • Fuel transportation, storage, and distribution systems design

    • Design and specification of process equipment packages

    • Single and multiphase liquid and gas pipe flow simulation

    • Single and multiphase line sizing

    • Gas pipeline flow and thermal modelling

    • Centrifugal gas compressor and pump modelling

    • Gas expander/compressor selection, modelling and simulation

    • Gas storage reservoir modelling

    • LPG straddle plant pipeline shrinkage model

    • Vertical gas scrubber sizing

    • Gas turbine selection

    • Gas heater and air cooler design

    • Vent stack design

    • Air compressor package design

    • Constructability and operability review

    • Heat transfer modelling and piping design

    • Multicomponent gas mixture thermodynamic and transport properties

    • Engineering for compressible orifice flows at high differential pressures

    • PSV sizing calculations as per AS, ASME, and API

    • PSV, PRV, TRV calculation and selection

    • Facility and pipeline blowdown thermodynamics

    AMMONIA

    • Steam systems

    • Natural Gas System

    • Air systems

    • Nitrogen system

    • Syn gas system

    • Hydrogen system

    • Amine system

    • Carbon dioxide system

    • Sea water system

    • Fresh water system

    • Desalination system

    • Cooling water system

    • Waste water system

    • Sulphuric acid system

    • Ammonium nitrate system

    • LPG/NG Flare system

    • Ammonia refrigeration system

    • Ammonia pipeline and boil off system

    • Ammonia jetty, loading

    Sustech can take up any fluid process and mineral process systems e.g.

    BIOCHAR & BIOFUELS

    COMPRESSED AIR ENERGY STORAGE

    LITHIUM, GOLD, COPPER, IRON ORE & OTHER METALS

    • Thickness calculation

    • MAOP, fracture control, energy discharge, penetration, road/rail crossing, buoyancy, upheaval, pipe stress, flow simulation, low temperature calculations

    • Network design and route selection in existing residential areas or new developments

    • Pipeline alignment sheet and pipeline assemblies drawing

    • Pipeline heat transfer model for conductive, convective, and radiant modes

    • Pipeline pigging system design

    • Pipeline design, engineering & analysis of natural gas & liquid hydrocarbon to AS 2885, EN 13480, ISO 14692, ASME 31.4, 31.8

    • Consumer requirement determination, location classification and provision for high consequence areas

    • Iro ore and other Slurry pipelines engineering and design

    • Water pipelines engineering and design

    • Bulk material handling

    • Design and specification of rotating machinery package

    • Start air receiver sizing

    • Orifice flow measurement using Crane and AGA 3 methods

    • Engineering for coil springs, transmission shafts and explosion vents

    • Rolling contact stress, plate stress, triaxial stress calculations

    • Heat transfer through flat and tubular plates calculation

    • Engineering for skid lifting and sea fastening, centre of gravity, clevis, padeye

    • Jack up, FPSO, fixed leg offshore equipment and facilities engineering

    • Tank farm design to AS 1940, tank design and remediation to API 653

    • Double-skinned self-containing tanks for combustible and hazardous fluids as per AS 1692, UL 142Rotating Equipment & Static Equipment Design

    • Materials & Welding

    • Mechanical Handling Systems

    • Static equipment analysis

      ·         Heat Exchangers

      ·         Pressure Vessels

      ·         Distillation Column

      ·         Boilers

      ·         Filters

      ·         Heaters

      ·         Pig receivers

    • Mechanical equipment package engineering

    • Item description Assessment of existing process, plant and equipment design and operations

    • Site Surveys & Data Capture

    • Engineering to cater owner’s goals and business cases

    • Check compatibility with existing plant

    • Retrofit & Replacement Design

    • Modular design for minimum site work during shutdown

    • Design for facilitating maximising offline fabrication

    • Shutdown & Turnaround Support

    • Operational Readiness

    • Master data entry

    • Life Extension & Integrity of impacted part of existing plant

    • Greenfield and Brownfield Piping engineering design for all fluid systems

    • Engineering of Piping, pipe supports, valves, specialty item specifications and rationalization

    • Engineering for piping blinds & spades, flange pressure/temperature rating, flange bolting by torque and water hammer calculations; pressure drop calculations

    • Writing piping specifications

    • Material selections for new fluids

    • Full Engineering and modelling/ drafting for support & piping modification design

    • Design of wellhead skid, city gate station, field regulating station, isolation, compressor station, scrapper station, laterals, custody transfer metering station, pressure reduction station

    • Low pressure distribution

    • Design and analysis of structures as per AS 4100, AS 3600, supported in Space Gass and STAADPro

    • Design and analysis of various power/process plant buildings and utility builds (workshop, warehouse, storage shed etc.)

    • Design of jetty and marine structures

    • Design of ship loaders

    • Design of offshore skid

    • Design and analysis of plant structures, technological platforms, pipe racks and supports

    • Design of communication and transmission towers

    • Design of substation, including transformer bunds, fire walls, switchyard structures

    • Design and engineering of temporary structures

    • 3D model development

    • Specification and work pack development

    • Virtual anchor calculation

    • Rail anchor bolt & foundation concrete assessment

    • Modularization studies

    • Engineering Design and remediation design

    • Earthworks

    • Drainage Systems

    • Roadworks

    • Bridges

    • Culverts

    • Storm water management design

    • Design of thrust blocks and anchor blocks

    • Design of foundations for reactors, equipment, and tank farms

    • Design of water tanks, pits

    • Design of guard walls

    • Retaining Wall Structures

    • Design for integration of power station in remote areas i.e solar, diesel, etc

    • Power System Modelling (DigSILENT, ETAP, PSSCAD, PSS/E, etc)

    • Building power and earthing requirements to AS 3000

    • Substation design

    • Transmission and distribution network planning and design i.e above ground 33kV or below ground power lines

    • Detail design of circuits and connections for HV, MV and LV switchgear

    • Detail cable design i.e routing underground and aboveground, rating, and pulling calculations

    • Detail earthing design, layouts and calculations

    • Lightning protection design and calculations

    • Electrical Drafting i.e Single-line diagrams

    • Electrical Design Studies

    • Short Circuit

    • Load Flow

    • Arc Flash

    • Harmonic

    • Protection Coordination

    • Grid Connection

    • Motor Analysis

    • Establish maintenance philosophies for instrumentation systems

    • Designing total instrumentation routine to meet individual requirements

    • Process instrumentation selection

    • Hazardous area equipment design and selection

    • Control and communication architecture

    • PLC I/O listing and component selection

    • Communications network design

    • Point to point wiring checks, function checks and loop checks to final handover of process instrumentation & control system including verification & validation of new and existing installations

    • Instrumentation calibration, loop checking and optimization

    • Diagnostic alarm checks, software modifications, & interlock checks as per the best industry practice for control systems (DCS, ESDS, PLC & SCADA)

    • Calibration & validation as per OEM recommendation for analysers

    • Multidisciplinary proficiency in 2D and 3D drafting:

    • Mechanical

    • Electrical & Instrumentation

    • Civil

    • Structural

    • Process

    • Cross industry i.e. Mining, Process, Power and Utilities, infrastructure etc

    • CAD Database development

    • Development of 3D models

    • Generation of general arrangement drawings

    • Isometric drawings

    • Navis works model and pdf models for viewing and design reviews

    • As-Built Update

    • Transferring plant design data to IBM MAXIMO  BIM module as master data

PROCESS INFRASTRUCTURE

    • EPCM of water and wastewater treatment plants 

    • EPCM of odour and sludge free modular sewage treatment plants 

    • Contract provision for servicing, operation and maintenance of treatment plants 

    • Expertise in different installation types (potable, demineralization, desalination etc.) 

    • Expertise in different installation locations (remote, urban, mine etc.) 

    • Equipment specifications and selection 

    • Water recovery 

    • Energy recovery 

    • Brine disposal design 

    • Due-diligence studies of existing systems 

    • Technical assistance in regulatory approvals 

    • Integration into hydrogen or ammonia production 

    • Open and combined cycle power systems (gas & steam cycle) 

    • Gas and diesel power plants 

    • Solar and wind power plants 

    • Power block 

    • Balance of plants 

NON-PROCESS INFRASTRUCTURE  

    • Design of utility systems (steam, air, water, lube oil, water treatment, ventilation, and others)

    • Water and air distribution system review and modification design

    • Cooling water systems and cooling towers

    • Rail loading, car dumpers, truck loading and unloading station concept design 

    • Rail anchor bolt & foundation concrete assessment 

    • Rail crossing, loop & train load out design 

    • Dust suppression design 

    • Haul & secondary access roads design 

    • Modularization studies 

    • Design and engineering of diesel tank farms as per DSG, AS 1940 and AS 1962 requirements

    • Design & engineering of diesel tank farms as per DSG, AS 1940 and AS 1962 requirements 

    • Double-skinned self-containing tanks for combustible and hazardous fluids as per AS 1692, UL 142 

    • Diesel refueling stations for vehicles 

    • Pipeline/transmission engineering for diesel conveyance 

    • Constructability & operability review 

    • Bund design and engineering 

    • Wash pad design and engineering 

    • Oil water disposal/treatment/collection 

    • Lube oil system design 

    • Tank remediation to API 653 

    • Air quality studies for mine sites 

    • Air quality remediation engineering 

    • Compressed air system sizing and selection 

NET ZERO

    • Operation emission reduction study

    • Net zero roadmap through hybrid and renewable power plants

    • Design of renewable energy utility integration

    • Process optimization to reduce carbon footprint

    • Design of pilot and standard size hydrogen plants

    • Construction and commissioning support for new technology proof of concept plants

    • Carbon capture and storage

    • Energy Efficiency Assessment of current plant 

    • Analysis for heat recovery opportunities 

    • Thermal Insulation Audit 

    • Opportunity for replacement or upgrade 

    • Equipment Optimization i.e Boiler, Steam Turbine or HVAC  

    • Conducted as per AS/NZS 3598 

    • Resource Assessment (PV-Syst) 

    • EPCM For Solar Installations 

    • Commissioning Management 

    • System selection (Hybrid, battery, PV standalone, etc) 

    • Design for integration into the existing grid / interconnection 

    • Design of protection systems 

    • Power Engineering Studies (ETAP) 

    • Short Circuit Analysis 

    • Arc Flash Studies 

    • Coordination Studies 

    • Load Flow Analysis 

    • System Layout 

    • Drafting (SLD’s, Layouts) 

    • Hydrogen technology and process selection

    • Financial modelling

    • Process design and simulation

    • Equipment selection and specification

    • Hydrogen and oxygen handling compliant with safety regulations and codes

    • Gas network grid modifications for hydrogen blending

    • Approval mapping and assistance (regulatory approval technical assistance, council approvals etc.)

    • Simulations to quantify extractable CO2

    • Technology selection

    • Assessing extra technology for additional CO2 sources

    • Concept design development

    • Conveyance of captured CO2 (pipeline design & routing, metallurgy, configuration, safety management, construction support)

    • Investment decision support

MINERAL PROCESSING 

    • Gold Concentrating plant

    • Large copper concentrate plant

    • Nickel ore processing

    • Bauxite ore processing

    • Pyro processing

    • Gravity separation

    • Expertise in SAG and Ball mill

    • Concept study for high-capacity mill

    • Specification preparation and vendor engineering

    • Mill expansion project and retrofitting

    • Mill commissioning assistance and troubleshooting

    • Equipment selection

    • Layout design

    • Hopper design

    • Feed and discharge system design

    • Dust and air pollution control

    • Maintainability enhancement study

    • Vibration and structural stability control

    • Basic design and optimization

    • Conveyor design as per CEMA or ISO 5048 & detail conveyor calculation

    • Conveyor starting & stopping analysis.

    • Conveyor drive system design

    • Design & selection of conveyor components

    • Rail loading station

    • Rail Design review and assessments (i.e. concrete, anchor bolt, mounting bolt)

    • Car dumper station

    • Truck loading and unloading station.

    • Capacity enhancement

    • Transportation optimization study

    • Stockyard capacity and layout selection

    • Reclaim hopper design.

    • Underground tunnels reclaim system design.

    • Stocking and reclaiming method selection

    • Covered stockpile system design.

    • Blending pile & system design

    • Transfer chute design

    • Ship Loader modification for optimization of process

    • Structural integrity assessment

    • Increase of throughput

    • Modular modification design