QUAD International
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Partner with Technical Excellence

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From mechanical erection and plant commissioning to high-yield solar PV installations, our senior engineering leads are ready to mobilize.

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QUAD International Logo

Engineering, construction, and trading company based in Dhaka, delivering dependable mechanical, EPC, commissioning, and sustainable solar energy solutions across Bangladesh.

ASME & API Compliant Documented QA/QC

Core Services

  • Mechanical Construction
  • EPC Services
  • Project Erection & Commissioning
  • Solar Energy – Supply & Installation
  • Industrial AC Service & Supply
  • Material Import & Export
  • Project Management & O&M Support

Pages

  • About Company
  • Services Directory
  • Field Track Record
  • Contact & Location

Headquarters

415 Faydabad Dokkhin Para, Faydabad Madrasha, Dokkhinkhan, Dhaka-1230, Bangladesh
+880 1673 789551+880 1828 080970
quadint.bd@gmail.com

Mohammad Saiful Islam

Co-founder & Project Coordinator

© 2026 QUAD International. Dhaka-1230, Bangladesh. All rights reserved.

Industrial photography under Unsplash Editorial License.

Services & Capabilities Directory

Integrated Lifecycle Engineering Services

QUAD International offers an integrated engineering portfolio spanning basic engineering and global procurement through to mechanical erection, systematic commissioning, and long-term facility maintenance.

01Mechanical
Mechanical Construction
Mechanical Construction

QUAD International executes end-to-end mechanical erection and fabrication works adhering to rigorous international standards (ASME B31.3, ASME BPVC). Our skilled crews handle heavy piping, complex structural steel, and critical static/rotating machinery.

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Scope of Work / Deliverables

  • Fabrication and installation of piping systems, pipe racks and supports
  • Installation of static equipment: vessels, columns, heat exchangers, storage tanks
  • Rotating equipment installation and precision alignment: pumps, compressors, turbines
  • Structural steel erection, welding, NDT coordination, hydrotesting and line flushing

Standards & Capabilities

  • ASME BPVC & B31.3 Certified Welding Procedures
  • Laser & Dial-Indicator Rotating Alignment
  • Hydrostatic & Pneumatic Pressure Testing
  • Crane Rigging & Heavy Lift Calculations
02Turnkey
EPC Services
EPC Services

From concept to mechanical completion, we assume full turnkey ownership. We bridge engineering design with localized procurement efficiency and disciplined construction management.

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Scope of Work / Deliverables

  • Basic and detailed engineering support, design review and documentation
  • Vendor selection, global procurement, expediting and quality surveillance
  • Construction management, planning, scheduling and cost control
  • Turnkey and package-based project execution for industrial facilities

Standards & Capabilities

  • P&ID & Detailed Isometric Generation
  • Schedule & Critical Path Management (CPM)
  • Vendor Pre-qualification & Auditing
  • Cost Forecasting & Cash Flow Governance
03Commissioning
Project Erection & Commissioning
Project Erection & Commissioning

We specialize in bridging cold mechanical completion with hot operational startup. Our multidisciplinary engineers execute pre-commissioning checks, loop checks, and client handover dossiers.

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Scope of Work / Deliverables

  • Pre-commissioning: instrument loop checks, chemical cleaning, leak and pressure testing
  • Commissioning support, performance testing and start-up assistance
  • Punch-list categorization, resolution tracking and closeout management
  • As-built documentation and comprehensive handover dossiers

Standards & Capabilities

  • Instrument Loop Calibration & Simulation
  • System Nitrogen Purging & Dew-point Verification
  • Performance Guarantee Run Documentation
  • Operator Training & Handover Manuals
04Renewable
Solar Energy – Supply & Installation
Solar Energy – Supply & Installation

Accelerating Bangladesh’s green transition with tailored rooftop solar solutions for industrial factories, export zones, commercial buildings, and institutional campuses.

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Scope of Work / Deliverables

  • Supply of tier-1 solar panels, grid-tie inverters, battery storage, and mounting structures
  • Site survey, shadow simulation, system sizing and customized electrical design
  • Professional installation, net-metering support, testing and grid synchronization
  • Automated cleaning systems, preventative maintenance, repair and cloud monitoring

Standards & Capabilities

  • Helioscope / PVsyst Yield Modeling
  • BREB & DPDC Net-Metering Compliance
  • Industrial Roof Load Structural Assessment
  • BESS (Battery Energy Storage Systems) Integration
05HVAC
Industrial AC Service & Supply
Industrial AC Service & Supply

Engineered temperature and humidity regulation systems essential for sensitive DCS control rooms, pharmaceutical setups, manufacturing floors, and corporate headquarters.

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Scope of Work / Deliverables

  • Supply and installation of VRF/VRV systems, chillers, and package units
  • Complete AC servicing, chemical coil cleaning, filter decontamination and washing
  • Pipe insulation, vapor barrier wrapping, valves, fittings and installation materials
  • Planned preventive maintenance (PPM) contracts and rapid 24/7 breakdown support

Standards & Capabilities

  • Cleanroom & Control Room CFM Balancing
  • Refrigerant Recovery & Leak Detection
  • Energy Efficiency Optimization Audits
  • Duct Fabrication & Acoustic Insulation
06Trading
Material Import & Export
Material Import & Export

Global supply chain connectivity for critical path refinery, power plant, and petrochemical consumables. We guarantee mill test certificates (MTC) and customs clearance.

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Scope of Work / Deliverables

  • Piping materials: seamless carbon/alloy pipes, flanges, fittings (CS, SS, Alloy)
  • Valves: gate, globe, check, ball, and control valves with full certification
  • Electrical & instrumentation items, transmitters, sensors, and spare parts
  • Supplier identification, price negotiation, third-party inspection, and customs clearance

Standards & Capabilities

  • EN 10204 3.1 & 3.2 Mill Test Verification
  • Ex-works to DDP Bangladesh Logistics
  • API 6D & NACE MR0175 Compliance Checks
  • Expedited Air Freight for Critical Shutdowns
07Management
Project Management & O&M Support
Project Management & O&M Support

QUAD International delivers seasoned field managers and engineering specialists to execute scheduled refinery turnarounds, unscheduled emergency repairs, and technical reporting.

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Scope of Work / Deliverables

  • Project coordination, schedule tracking, progress reporting and stakeholder management
  • Operation and maintenance (O&M) contracts, shutdown and turnaround manpower
  • Engineering consultancy documentation, P&ID updates, and technical audit reporting
  • Equipment health monitoring, vibration analysis, and lube-oil management

Standards & Capabilities

  • Refinery Shutdown & Turnaround (TAR) Planning
  • ASME BPVC Code Calculations & Documentation
  • Root Cause Failure Analysis (RCFA)
  • Maintenance Readiness Reviews