Technologies
Steel tube fabrication is the process of cutting, forming, bending, and welding steel tubes to exact dimensional specifications for structural, mechanical, or fluid-transfer applications. Common proce
Steel tube fabrication is the process of cutting, forming, bending, and welding steel tubes to exact dimensional specifications for structural, mechanical, or fluid-transfer applications. Common processes include laser tube cutting, CNC roll bending, and TIG or MIG welding, applied to grades such as
Steel tube fabrication is the process of cutting, forming, bending, and welding steel tubes to exact dimensional specifications for structural, mechanical, or fluid-transfer applications. Common processes include laser tube cutting, CNC roll bending, and TIG or MIG welding, applied to grades such as S235, S355, and 304 stainless steel.
Steel tube fabrication follows a defined workflow from raw stock to finished assembly. Engineers across Cairo, Alexandria, Jeddah, and Riyadh depend on these steps to deliver parts on time and to tolerance:
Material Selection — Specify the tube grade (S235 for general structural work per EN 10219, S355 for higher strength applications, or 304/316 stainless for corrosive environments) and confirm wall thickness and outer diameter against your design requirements.
Laser Tube Cutting — Fiber laser cutting removes scrap and creates precise cut profiles, notches, and holes. At Entag, laser tube cutting holds ±0.1 mm on cut length and ±0.5° on bevel angle, eliminating secondary deburring for most applications.
CNC Roll Bending — Curved sections and complex profiles are formed using CNC-controlled mandrel bending. Wall thinning remains within the 15% structural code maximum, ensuring integrity under load.
TIG/MIG Welding — Tubes are joined and assembled to full penetration. All welds meet ISO 5817 Quality Level B — the standard recognised by Egyptian EPCs and Saudi Aramco supply-chain vendors — verified by visual and dimensional inspection on every batch.
Finishing & Inspection — Parts receive surface treatment (powder coat, zinc plating, or stainless passivation) and dimensional verification before shipment to Cairo, Jeddah, Riyadh, or Dammam.
The grade you choose determines cost, strength, and corrosion resistance. S235 and S355 structural steel (EN 10219 and EN 10210 cold-formed and hot-formed hollow sections) are the market standards in Egypt and Saudi Arabia. S235 suits general frameworks and HVAC ductwork; S355 is specified where higher yield strength is critical — multi-storey frames, heavy piping, bridge components. For environments exposed to salt spray or moisture, 304 or 316 stainless steel (ASTM A554) eliminates rust and maintenance burden. Galvanised mild steel is cost-effective for outdoor infrastructure when corrosion protection is secondary. Entag maintains stock of S235, S355, and 304 stainless in round, square, and rectangular profiles; special grades are sourced on request with 5–7 day lead time.
Laser tube cutting and CNC roll bending are the two processes engineers evaluate most often when specifying fabricated assemblies. The table below compares their key decision factors:
| Feature | Laser Tube Cutting | CNC Roll Bending |
|---|---|---|
| Best for | Complex profiles, notches, holes, miters | Curved sections, handrails, frames |
| Typical tolerance | ±0.1 mm cut length | ±0.5° bend angle |
| Compatible tube sections | Round, square, rectangular, angle | Round, square, rectangular |
| Lead time advantage | No tooling — same-day setup | Minimal tooling cost |
TIG welding suits structural and pressure-vessel applications where full penetration and aesthetic finish matter. MIG welding is faster for high-volume production and shop fabrication. Both processes are qualified to ISO 5817 at Entag. For more advanced geometric requirements, explore our tube fabrication services and complementary CNC machining services in Egypt.
Structural steel tube fabrication supports construction frames in Cairo and Riyadh, HVAC ductwork systems, industrial handrails and guardrails, and process piping for refineries and manufacturing plants. Oil and gas support structures in Dammam and Jeddah demand precision tube assemblies that withstand vibration and corrosion. For projects requiring both tube and sheet components, our sheet metal fabrication in Egypt services complement tube work seamlessly.
What is the difference between steel tube and steel pipe fabrication?
Tubes are specified by outer diameter (OD) and wall thickness and used primarily in structural and mechanical applications. Pipes are specified by nominal pipe size (NPS) for fluid transfer and internal flow rates. Fabrication processes overlap significantly, but tube fabrication typically demands tighter dimensional tolerances (±0.1 mm on cut length) and a cleaner surface finish than pipe fabrication, which prioritises pressure-tight sealing over dimensional precision.
What steel grades are used in structural tube fabrication?
S235 and S355 (per EN 10219/EN 10210) are the most widely specified structural grades in Egypt and Saudi Arabia. S235 suits general frameworks and HVAC ductwork; S355 is used where higher yield strength and load-bearing capacity are required in multi-storey structures. For corrosive or hygienic environments, 304 or 316 stainless steel (ASTM A554) is the standard choice and eliminates rust maintenance over the component lifetime.
What tolerances can you hold on fabricated steel tubes?
At Entag, laser tube cutting holds ±0.1 mm on cut length and ±0.5° on bevel or miter angles, meeting ISO 2768-m precision standards. CNC roll bending achieves wall-thinning within the 15% structural code limit and bending angle repeatability of ±0.5°. All tolerances are validated through dimensional inspection on every batch before delivery, with a full dimensional report provided on request.
How long does steel tube fabrication take?
Lead time depends on complexity and quantity. Simple laser-cut tube parts with no secondary operations typically ship within 3–5 business days. Assemblies requiring bending, welding, and finishing generally take 7–12 business days. Entag provides a confirmed timeline with every quote, and expedited schedules are available for urgent projects.
What file formats do I need to submit for tube fabrication?
For laser tube cutting, submit STEP, IGES, or DXF files that include tube profile, wall thickness, and cut geometry. For bent or welded assemblies, a 3D STEP file with full assembly detail and material specifications is preferred. Entag's engineering team will review your files for design-for-manufacturability (DFM) and flag any conflicts with ISO 5817 weld standards or cutting tolerances before production begins.
Does Entag supply steel tubes or do I need to provide material?
Entag operates on a supply-and-fabricate model — we source raw tube stock and deliver finished fabricated parts. We stock common structural grades (S235, S355) and standard stainless sections, and can source special grades on request. This simplifies procurement for engineering teams across Egypt, Jeddah, Riyadh, and Dammam who need a single-vendor solution.
Ready to start your project? Request a quote on Entag — upload your CAD file and get a price in 24 hours.
