Hot-Dip Galvanizing · Structural Steel · Karachi, Pakistan
Steel That Outlives Corrosion.
Built to International Standards.
Commercial hot-dip galvanizing and heavy structural steel fabrication — a 27 ft molten zinc bath at ~450°C, 24,000 MT of annual throughput, and every batch certified to ASTM A123 / BS EN ISO 1461.
01 — Interactive Engineering Tool
Coating Lifespan & Thickness Calculator
Estimates your zinc coating spec and maintenance-free service life per ASTM A123 and ISO 9223 atmospheric corrosion rates.
Zinc loss rates follow ISO 9223: C2 ≈ 0.7 µm/yr → CX ≈ 8.0 µm/yr.
Indicative estimate — actual life depends on exposure, edge condition and steel surface prep.
02 — Interactive Engineering Tool
Steel Weight & Galvanizing Surface Estimator
Quick structural take-off: weight, zinc requirement and one-click import into the RFQ form.
Section unit weights: I-Beam 30 · Channel 18.5 · Angle 12.2 · Pipe 15.8 kg/m · Plate 78.5 kg/m² per 10mm.
03 — Core Services
One Workshop. The Full Steel Protection Cycle.
From raw fabrication to certified zinc coating — every stage in-house under one roof.
Commercial Hot-Dip Galvanizing
Full immersion in a 27 ft molten zinc bath at ~450°C. Metallurgically bonded zinc coating of 85–120 µm that shrugs off rust, salt air and industrial atmospheres.
- Structures, sections & fabrications up to 27 ft
- Zinc coating 85–120 µm per ASTM A123
- Bath chemistry & temperature logged per batch
Structural Steel Fabrication
Girders, trusses, towers, machine parts and industrial sheds — detailed in CAD, cut on CNC plasma, welded by certified MIG/TIG/arc welders and trial-assembled.
- CAD detailing & CNC plasma cutting
- MIG / TIG / arc welding — certified welders
- Fitting, jigging & trial assembly
Surface Preparation & Quality Assurance
Sandblasting to SA 2.5 and pickling before dipping, then coating thickness verification with magnetic gauges per ASTM E376 — test certificates with every dispatch.
- Sandblasting SA 2.5 & pickling lines
- Magnetic gauge testing — ASTM E376
- Adhesion, visual & thickness records per batch
Pipe & Tubular Dipping
Internal and external zinc protection for pipes, tubes, poles and hollow sections — including racking setups that ensure full drainage and uniform coating.
- Internal & external protective coating
- Venting & drainage racking design
- Threaded fasteners per ASTM A153
04 — Process
The 6-Stage Galvanizing Lifecycle
Select a stage to see what happens to your steel at each step.
1. Degreasing & Alkali Rinse
Steel is cleaned in a hot alkaline bath to remove oils, grease and shop dirt. A clean surface is essential — any contamination here shows up as bare patches in the finished zinc coating. Parts are then rinsed to remove residual alkali before pickling.
05 — Proof
Untreated Steel vs. 25 Years of Hot-Dip Galvanizing
Drag the handle to compare.
06 — Gallery
From Raw Steel to Certified Zinc
Tower structure fabrication
Beams staged for delivery
Zinc spangle after dipping
Molten metal handling
Certified welding
Welding in progress
Heavy pipe fabrication
Pipe coating application
07 — Standards
Technical Standards Matrix
Every batch is processed and certified against internationally recognised specifications.
Specification for zinc (hot-dip galvanized) coatings on iron and steel products — structural shapes, plates and bars.
Hot-dip galvanized coatings on fabricated iron and steel articles — coating thickness, finish and sampling requirements.
Zinc coating (hot-dip) on iron and steel hardware — threaded fasteners, fittings and small parts.
Practice for measuring coating thickness by magnetic-field or eddy-current (electromagnetic) test methods.
08 — What We Process
Most Demanded Steel Products — Galvanized & Fabricated
These are the steel products Pakistani industry searches for most. We fabricate, hot-dip galvanize and deliver every one of them to ASTM A123 / BS EN ISO 1461 — tap any card for a same-day quote.
Steel Grating (Floor Grating)
Serrated & flat-top grating panels for walkways, platforms, trenches and mezzanine decks.
- MS or galvanized, any panel size
- Bearing & cross bars per spec
- Dipped after fabrication — no bare cuts
Chequered Plate / Checker Plate
Anti-slip chequered plates for flooring, ramps, truck beds and stair treads — galvanized after cutting.
- 1.6 mm – 10 mm thickness
- Cut, drilled & edge-dressed
- Full 85–120 µm zinc coating
MS Angle, Channel & Beam
Structural sections — angles, channels, I-beams and H-beams — fabricated and galvanized to length.
- Sections up to 27 ft in one dip
- Holes drilled before dipping
- Bolt-assembly friendly venting
MS / GI Pipe & Tube
Round, square and rectangular pipes, tubes, poles and hollow sections — internal and external zinc protection.
- Internal & external coating
- Venting & drainage racking
- Threaded fasteners per ASTM A153
Expanded Metal Mesh
Expanded metal sheets for fencing, partitions, machine guards and walkways — galvanized for outdoor life.
- Diamond or square pattern
- Sheets cut to size
- Coastal-grade corrosion proofing
Welded Wire Mesh & Grills
Welded mesh panels, window grills and partition screens — plain or powder-coated over galvanizing.
- Panel or roll sizes
- Edge frames welded on request
- Double protection: zinc + paint
Handrails & Railings
MS, stainless and galvanized handrails, balustrades and guard rails — fabricated and dipped as complete sets.
- Industrial or architectural finish
- Flanges & brackets included
- Site-measured to fit
Mezzanine Floor Structures
Complete mezzanine packages — columns, beams, grating or chequered decking, stairs and handrails.
- Design & load calculation included
- All members galvanized
- Bolt-together site assembly
Steel Staircases & Platforms
Straight, spiral and industrial staircases with anti-slip treads, landings and access platforms.
- Made to your rise & run
- Grating or chequered treads
- Fully galvanized, ready to bolt
Industrial Sheds & Structures
Portal frames, trusses, purlins and complete pre-engineered shed structures — fabricated and galvanized.
- Design-to-erection packages
- All framing hot-dip galvanized
- Cladding & accessories supplied
Solar Mounting Structures
Galvanized solar racking and mounting frames for rooftop and ground-mount plants — built for 25-year outdoor life.
- Wind-load engineered
- Hot-dip galvanized per ASTM A123
- Rooftop or ground-mount kits
Steel Gates, Doors & Frames
Sliding, swing and folding gates, security doors and frames in any size — galvanized before final finish.
- Any size & locking system
- Galvanized + powder-coated
- Hinges & hardware per ASTM A153
09 — FAQ
Galvanizing Questions — Answered
Straight answers on pricing, turnaround, standards and what you can send us.
What is hot-dip galvanizing?
Hot-dip galvanizing immerses prepared steel in a molten zinc bath at ~450°C, creating a metallurgically bonded zinc coating (typically 85–120 µm) that protects against corrosion for decades. It is the world's most widely used corrosion protection for structural steel.
How much does hot-dip galvanizing cost in Pakistan?
Galvanizing is priced per kg and varies by section size, surface condition and order quantity. Our current rate ranges from PKR 180–300 per kg; for quantities above 20 tons, the minimum rate is PKR 180 per kg. Thin sections carry more surface area per kg, so they sit at the upper end of the range. Send your item list and tonnage for an exact same-day quote.
What is the maximum steel length you can galvanize?
Our kettle accepts sections up to 27 ft (8.2 m) in a single dip — no splices. Longer assemblies can be designed in two pieces and bolted after dipping.
How long does galvanizing take?
Standard galvanizing jobs are completed in 24–48 hours after receipt. Fabrication plus galvanizing turnkey packages typically run 1–3 weeks depending on complexity.
Do you fabricate steel before galvanizing?
Yes. CAD detailing, CNC plasma cutting, certified MIG/TIG/arc welding, trial assembly and then hot-dip galvanizing — the full cycle is done in-house under one roof.
Which standards do you certify to?
ASTM A123 and BS EN ISO 1461 for zinc coatings, ASTM A153 for hardware and fasteners, and ASTM E376 for coating thickness measurement. Test certificates are issued with every dispatch.
Can you re-galvanize existing or rusty steel?
Yes. We sandblast existing steel to SA 2.5, re-galvanize it, and touch up damaged coatings. We also service and repair galvanized structures in the field.
Do you deliver outside Karachi?
Yes. We arrange transport across Pakistan — including Lahore, Islamabad, Hyderabad, Sukkur and all major industrial zones.
10 — Get a Quote
Instant RFQ — Direct to WhatsApp
Fill the form and it opens a pre-formatted WhatsApp message to our engineers. Response within working hours.