Are you compliant with NHAI tender specs?

Yes. Our process complies with IS 4759, ISO 1461 and ASTM A123/A153. We provide DFT/inspection dossiers with each dispatch.

What are your usual lead times?

Standard: 3–5 working days; Rush: 48–72 hours subject to production slots.

Galvanizing for Highway Projects in Chennai – NHAI Compliant

Q: What coating thickness is typical for crash barriers?

Typical zinc coating is 80–120 μm for barriers and posts per IS 4759 / ISO 1461 / ASTM A123, depending on section thickness.

RR GalvaGlow specializes in galvanizing for highway projects in Chennai, delivering long-lasting corrosion protection for guardrails, crash barriers, lighting poles, and overhead sign gantries. Our hot dip galvanizing process is fully compliant with IS 4759, ISO 1461, and ASTM A123 standards, ensuring reliable zinc coating thickness and uniform coverage across all structural members. With decades of expertise in NHAI and Tamil Nadu infrastructure works, we guarantee fast turnaround times, precision finishing, and lot-wise quality inspection reports. Whether it’s national highways, urban expressways, or state roads, our solutions provide heavy-duty anti-rust protection trusted by EPC contractors, government agencies, and transport authorities.

Technical Specifications

Application	Typical DFT (μm)	Standards Followed	Inspection & Tests
Crash Barriers (W/Thrie-Beam) & Posts	80–120	IS 4759 / ISO 1461 / ASTM A123	DFT mapping, visual, adhesion (sampling)
Lighting Poles & Sign Gantries	~100	ISO 1461 / IS 4759	Magnetic gauge DFT, finish & appearance
Hardware & Accessories	As per class	ASTM A153 / IS 4759	Thread cleaning, passivation (on request)

Our Highway Project Galvanizing Process

We provide galvanizing QC services across:

Surface Preparation & Pickling – Complete degreasing and acid cleaning to remove rust, scale, and contaminants.
Fluxing – Ensures strong zinc adhesion and prevents oxidation before dipping.
Hot Dip Galvanizing – Structural members immersed in molten zinc at ~450°C for uniform coating.
Cooling & Dressing – Smooth finishing, removal of spikes and excess zinc.
Quality Inspection – Lot-wise DFT readings, adhesion tests, and visual checks documented for submission.

Applications

Highway guardrails and crash barriers
Roadside lighting poles and signal posts
Sign gantries and overhead boards
Pedestrian barriers and median dividers
NHAI tender works in Chennai & Tamil Nadu

Project References

NHAI Chennai Bypass Expansion – crash barriers & lighting poles galvanized.
Tamil Nadu State Highways – sign gantries and pedestrian safety rails.
EPC contractors for expressways – end-to-end galvanizing with DFT documentation.

Quality Assurance

ISO 1461, IS 4759, ASTM A123 certified process
Lot-wise DFT reports with magnetic gauge readings
Visual & adhesion testing for every batch
Batch traceability for government tender compliance

Delivery & Turnaround

Standard: 3–5 working days
Priority/Rush: 48–72 hours (slot-dependent)
Pickup/dispatch support across Chennai & Tamil Nadu

Protect Your Highway Projects with ISO-Certified Galvanizing

Get heavy-duty corrosion protection for guardrails, barriers, and gantries. Limited production slots for Q3 Chennai projects – book now.

Call: +91 994 033 2979

Email: sales@rrgalvaglow.com

FAQs

What zinc coating thickness is provided for highway guardrails?

We typically deliver 80–120 μm for barriers and posts per IS 4759 / ISO 1461 / ASTM A123, depending on section thickness.

Do you supply inspection and test reports?

Yes. Each batch comes with DFT reports, visual inspection notes, and acceptance criteria.

Can you handle urgent crash barrier orders in Chennai?

Yes. We offer 48–72 hour turnaround for priority highway projects.

Are your coatings compliant with NHAI tender specifications?

Yes. Our process complies with IS 4759, ISO 1461 and ASTM A123/A153 and is accepted for NHAI and state tenders. DFT/inspection dossiers are provided.

Do you also galvanize lighting poles and sign gantries?

Yes. We galvanize lighting columns, gantries, and overhead boards for highways and expressways.

Request a Quote

Need galvanizing for highway projects in Chennai? Share barrier/pole/gantry drawings—our team will reply with pricing and lead time within 24 hours.

Galvanizing for Highway Projects in Chennai – ISO Certified