STRUCTURAL STEEL FABRICATION IN VIETNAM

Nam Trung fabricates structural steel components according to approved design documents, shop drawings or drawings provided by the client. Our fabrication scope includes:

Built-up H-beams

Built-up I-beams

Steel columns

Steel rafters

Roof trusses

Portal frames

Bracing systems

Steel platforms

Industrial walkways

Stairs and ladders

Handrails

Pipe racks

Equipment support structures

Heavy welded steel components

Connection plates

Secondary steel components

Fabrication specifications are reviewed according to each project’s:

• Material requirements
• Dimensions and tolerances
• Welding specifications
• Inspection requirements
• Coating systems
• Packing requirements
• Delivery schedule

We can also fabricate components based on client-supplied drawings after technical review and clarification.

To ensure the quality and durability of structural steel, the steel structure fabrication process at the factory must comply with technical requirements. The standard steel structure fabrication process includes the following basic steps:

Step 1: Check input materials

Materials when imported need to be carefully checked from the source of supply to ensure safety and ability to meet the technical requirements of construction materials. The work of checking the quality of input materials includes:

• Checking quality records.
• Checking information against project requirements.
• Checking against current standards.

Step 2: Cutting/discharging steel

Steel plates are cut to the required shape and size in the technical drawing. Steel structure components have 2 common forms:

• Profiled steel: Precast during production, so cutting steel is just the work of removing excess parts to ensure the structure meets the design requirements.
• Composite steel: Cut from steel plates and processed into shapes according to customer requirements. Then, combine individual steel plates to form complete components.

Some modern steel cutting/discharging technologies for steel structure processing include: automatic cutting technology with Laser machines, automatic Plasma & oxygen cutting machines, slitting machines, bending machines, circular saws, band saws, automatic cutting with oxygen machines, etc.

Step 3: Assemble the assembly and process the code plate.

In the steel structure fabrication process, the composite fixture is also known as the steel network. This is a system of parallel steel beams and struts between them, used to create structures in construction works.

This stage includes the process of punching holes for the bracket and using bolts to attach steel structures or connect beams to columns. According to the steel structure design, the flanges and webs of the steel members after cutting will be positioned in positions, then connected by temporary welds.

Step 4: Welding the assembly

After positioning and assembling with temporary welds, the components are put into the automatic welding machine. To ensure the weld is technically correct and of the best quality, the weld surface must be inspected visually first, then the weld quality is checked by ultrasonic or magnetic testing.

Step 5: Adjust the steel structure

During the welding process, high temperatures can cause the components to warp. Therefore, to ensure high precision during assembly, the components need to be adjusted, straightened and checked before moving on to the next steps.

Step 6: Welding the bracket and reinforcing ribs

Once the members are welded and precisely aligned, the reinforcing ribs and flanges are welded. This stage of the steel fabrication process is performed by highly skilled workers to ensure high precision.

Step 7: Surface cleaning and shot blasting

The components after processing need to be surface treated to remove water stains, grease and other dirt. Here, the components will be cleaned by surface rust removal method and treated with shot blasting machine before moving on to the final painting and finishing work.

Step 8: Finishing paint for structural steel

The durability of the structure when processing steel structures and during use depends largely on the protective coating layer that protects the structure from environmental impacts. Normally, the surface of the structure will be painted with 1 layer of anti-rust paint and 2 layers of color paint according to customer requirements.

Some notes on the steel structure processing process

• Raw materials must have a clear certificate of origin, in accordance with ASTM standards and other standards such as BS, JIS.
• The machinery system must meet standards and have high stability to best serve the steel structure processing process.
• The team of engineers and workers must be well-trained in expertise and have many years of experience in the field of steel structure production.
• Quality control (QC) staff must carefully inspect the product to promptly detect errors.

How Does Nam Trung Control Fabrication Quality?

Quality control is carried out throughout the fabrication process, from incoming materials to final inspection.

At Nam Trung, key control points include material identification, dimensional checks, welding inspection, surface preparation and coating inspection. Depending on project requirements, NDT methods such as UT or MT may also be applied.

Inspection records and relevant production documents are maintained as part of the project quality file.

Nam Trung operates under an ISO 9001:2015 quality management system and applies welding quality controls in line with EN ISO 3834-2 requirements.

Typical quality control activities

• Material certificate and traceability checks
• Dimensional inspection
• Welding control and visual inspection
• NDT when required
• Surface preparation inspection
• Dry film thickness measurement
• Final inspection before packing and delivery

Structural Steel Fabrication for Export

Nam Trung provides fabrication services for international customers requiring structural steel manufactured in Vietnam.

Projects can be carried out based on client drawings, approved shop drawings and specific technical requirements. Our scope can cover fabrication, inspection, surface treatment, component marking, packing and delivery coordination.

For export orders, particular attention is given to identification and packing so that components can be handled efficiently during transportation and installation at the destination.

Nam Trung’s production facilities are located in southern Vietnam, with convenient access to the Cai Mep deep-sea port system, supporting international shipment of fabricated steel.

Export fabrication support may include

• Fabrication from client drawings
• Shop drawing coordination
• Material traceability
• Inspection and testing
• Surface treatment and coating
• Trial assembly when required
• Component marking
• Export packing
• Packing lists and shipping documentation
• Delivery coordination to port

Frequently Asked Questions

What types of structural steel can Nam Trung fabricate?

Nam Trung fabricates built-up beams, columns, rafters, trusses, structural frames, platforms, stairs, handrails, pipe racks, equipment support structures and custom steel components based on approved drawings.

Can Nam Trung fabricate structural steel from client drawings?

Yes. Our team can review client drawings, coordinate technical requirements and manufacture components according to approved fabrication documents.

Does Nam Trung provide shop drawing services?

Yes. Our in-house engineering team can support shop drawings, fabrication drawings and connection detailing within the agreed project scope.

Can Nam Trung supply structural steel for export?

Yes. We provide fabrication, inspection, component marking, export packing and delivery coordination for international orders.

What is Nam Trung’s annual fabrication capacity?

Nam Trung operates two fabrication facilities with a combined annual production capacity of more than 30,000 tons.

Can trial assembly be performed before delivery?

Trial assembly can be arranged when required, depending on component size, project specifications and the agreed inspection plan.

What quality inspections are available?

Inspection may include material verification, dimensional inspection, visual welding inspection, ultrasonic testing, magnetic particle testing and coating thickness measurement, depending on project requirements.

How can we request a quotation?

Send us your drawings, estimated steel quantity, specifications, coating requirements and delivery schedule. Our team will review the documents and respond with the next steps.