Quality Is Controlled at Every Stage
At Duct Technology, quality review begins at the initial stage and continues until the work is completed. Our manufacturing process combines material review, consultant approval, laboratory testing, production controls and dimensional inspection to ensure that fabricated ductwork follows the required specifications.
Manufactured to Recognized HVAC Standards
The company profile states that ductwork is fabricated strictly according to recognized international specifications or the consultant's specific requirements:
DW 144
British specification for sheet metal ductwork referenced throughout our manufacturing process.
SMACNA
Sheet Metal and Air Conditioning Contractors' National Association HVAC duct construction standards.
ASHRAE
Referenced standards for HVAC systems, equipment, airflow dynamics, and mechanical performance.
Consultant Specifications
Custom fabrication tailored to the stringent engineering requirements of project consultants.
Material Is Reviewed Before Production
Quality begins with raw materials. The documented project procedure verifies traceability, material certifications, and consultant approvals prior to manufacturing:
- 1Raw material specifications review
- 2Material approval & mill test certificates
- 3Approved supplier selection
- 4Manufactured sample submission to consultant
- 5Independent laboratory testing
- 6Approved material release to production line
Inspection Continues Through Fabrication
Quality control is integrated directly into the manufacturing sequence. The documented fabrication procedure includes dimensional inspection after forming and a second dimensional check after connecting and adding corners.
Material
Raw material specifications and consultant approval verification.
Production
Controlled machine settings, CNC cut verification, and automated forming.
Dimensional Check
First dimensional inspection immediately after forming and seam locking.
Recheck
Second dimensional verification after connecting, assembling, and adding corners.
Handover
Weighing, labeling, protective packing, and final delivery documentation.
Precision Supported by Automated Production
The factory uses automated American and European machinery for seam locking, CNC profile cutting, and duct fabrication. Automated flange cutting is also utilized to achieve accurate flange sizes.
Automation improves consistency. Quality control verifies the result.
A Process That Starts With the Customer
Duct Technology's quality approach begins by listening to customer concerns, analyzing problems, identifying their root causes, and developing robust engineering responses across four core principles:
Understand the requirement
Detailed review of project drawings, consultant specs, and engineering criteria.
Approve the material
Validate raw stock and obtain consultant sample sign-off prior to batch production.
Control fabrication
Continuous monitoring of gauges, seam tolerances, and machine calibration.
Verify before handover
Final multi-point dimensional inspection and project paperwork sign-off.
Built to Meet Project Approval Requirements
Our documented project process includes consultant review and approval of manufactured samples and materials before production proceeds, ensuring seamless site acceptance across major contractors and consultants.