Material traceability
Steel grade and heat numbers are checked against mill test certificates before cutting, so each member can be traced back to the plate or section it was cut from.
Quality Control
Defined checkpoints before shipment release
Materials, fabrication, dimensions, coating and packing are inspected against the approved drawings and the standard specified for each project.
Inspection Flow
Quality steps across fabrication
Each stage is checked before the next one starts, so a problem is found while the member is still in the workshop rather than after it reaches site.
- 1
Material receiving check
Steel grade, heat number and mill test certificates are checked against the approved material list before any plate or section is cut.
- 2
Cutting and drilling check
Component length, hole diameter, hole group position and edge preparation are measured against the approved shop drawings.
- 3
Assembly and welding check
Fit-up, root gap, camber and weld leg size are checked before welding. Weld procedures and welder qualification follow the standard specified for the project.
- 4
Dimensional inspection
Overall length, squareness, member straightness, connection locations and hole groups are measured after welding and before surface treatment.
- 5
Surface treatment check
Shot-blast grade, coating dry film thickness or galvanizing coverage are inspected and recorded against the coating specification.
- 6
Packing inspection
Bundle contents, piece marks, protection of connection faces and the loose-part list are checked against the packing list before loading.
Inspection Methods
How each checkpoint is verified
Inspection is a measurement, not an opinion. Each checkpoint below produces a record that can be matched against the member list.
Weld inspection
All main member welds receive visual inspection. Full-penetration and specified joints are additionally tested by ultrasonic or magnetic particle methods where the project requires it.
Dimensional inspection
Member length, squareness, straightness, camber, connection positions and hole groups are measured after welding and before surface treatment.
Coating inspection
Shot-blast grade is confirmed before coating. Dry film thickness is measured per coat, and galvanizing coverage is checked against the specification.
Non-conformance handling
Members outside tolerance are marked, separated from released stock and corrected or replaced before they re-enter the release flow.
Release records
Inspection records, coating records, the packing list and loading photographs are issued with the shipment so the buyer can match paperwork to delivered components.
Standards & Materials
What the work is measured against
The applicable standard is confirmed during the scope review, so fabrication, welding and coating are inspected against a named specification rather than a general expectation.
- Structural steel
- Q235B and Q355B to GB/T 700 and GB/T 1591, with ASTM A36, ASTM A572 Gr.50, EN 10025 S235JR and S355JR equivalents available on request.
- Welding
- Welding procedures and welder qualification follow the standard specified for the project, with submerged arc welding for main members and CO2 / MAG for secondary and connection details.
- Corrosion protection
- Shot blasting to Sa 2.5 with a primer, intermediate and topcoat system, or hot-dip galvanizing to ISO 1461 / ASTM A123.
- Inspection
- Dimensional checks, weld visual inspection and ultrasonic or magnetic particle testing where specified, recorded against the member list.
Factory Evidence
Photographs from the production and release path
These photographs document the workshop, welding, fabricated components and container dispatch at the fabrication facility.
Welding in progress
Active welding on a structural steel member inside the fabrication workshop.
Component review
Fabricated steel components checked at close range in the workshop.
Fabricated beam
A fabricated steel beam documented inside the production environment.
Container dispatch
Container transport positioned at the fabrication facility before loading.