Industrial Fabrication Company in India | Heavy Steel Fabrication | NPEC
Heavy fabrication for tunnel, bridge & industrial projects across Northeast India, Sikkim & Bhutan.
NPEC designs, fabricates and delivers Hydraulic Tunnel Gantry systems, Steel Bridges, and Pre-Engineered Buildings — with 18+ years serving EPC contractors and infrastructure developers in the Northeast, Sikkim, Bhutan, and pan-India.
Not catalogue.
Why NPEC?
With a focus in tunneling formworks and large span truss, we provide quality work under strict time schedules.
Our Verticals
Hydraulic Tunnel Gantry
Specialist manufacturer of hydraulic tunnel gantry systems for NATM, railway, irrigation, hydropower and ventilation tunnels. Every gantry engineered to project specification.
NATM Tunnel Gantry
New Austrian Tunnelling Method gantries for lining installation in metro, railway and highway tunnels.
Railway Tunnel Gantry
Dedicated gantry systems for railway tunnel projects — matched to track alignment and IR specifications.
Irrigation Tunnel Gantry
Long-lining irrigation tunnels with continuous pour cycles. Delivered for major irrigation projects across India.
Hydropower Tunnel Gantry
Headrace, tailrace, diversion tunnels. Multiple installations across NE India, Sikkim and Bhutan hydro projects.
Ventilation Tunnel Gantry
Hydraulic ventilation tunnel formwork — including 8.5m × 9m ventilation gantry delivered for the Gwalior project.
D-Shape & Custom Gantry
Non-circular tunnel profiles. Custom shapes engineered from project drawings — 5m D-shape delivered to Sikkim.
Supply & Fabrication of Hydraulic Tunnel Gantry
Full gantry system for the Lakhwar hydropower project, end-to-end.
5m D-Shape Gantry (5m × 6m × 4.5m)
D-shape hydraulic gantry for Sikkim tunnel project. Custom hydraulic actuation.
8.5m × 9m Hydraulic Ventilation Gantry
Ventilation tunnel gantry — 8.5m width × 9m length for the Gwalior project.
Steel Bridge Fabrication
Design, fabrication and supply of steel bridges for highways, railways and cross-border infrastructure. Deep experience in Northeast India, Sikkim and Bhutan bridge projects.
Highway Steel Bridges
Steel bridges for NHAI, state highway, and district road projects. Engineered to load spec and terrain constraints.
Railway Steel Bridges
Bridge structures for Indian Railways and metro projects — including railway truss bridges up to 42.5m span delivered.
Cross-Border Bridges
Cross-border infrastructure — including 50m steel bridges delivered to Bhutan. Handling of cross-border logistics.
Launching Nose & Girders
Launching nose fabrication and deck girder supply for bridge erection projects across India.
Modular Steel Bridges
Modular bridge components for rapid deployment — well-suited for Northeast terrain and remote projects.
Foot & Pedestrian Bridges
Steel foot bridges and pedestrian overbridges for urban and infrastructure use.
50m Steel Bridge — 2 Nos + 18m Bridge
Supply and fabrication of two 50-meter span steel bridges for infrastructure projects in Bhutan.
42.5m Steel Truss Bridge
Drawing, supply and fabrication of a 42.5-meter steel truss bridge for the Malana project.
Fabrication & Mockup of Launching Nose
Launching nose fabrication and full mockup assembly for bridge erection.
Pre-Engineered Buildings (PEB)
Pre-engineered steel buildings for industrial, warehousing and logistics use — designed and fabricated end-to-end. Serving Northeast India, Sikkim and Bhutan industrial developers.
Industrial PEB
PEB structures for manufacturing units, industrial workshops, and processing plants.
Warehouse PEB
Large-span warehouse buildings — up to 23,982 sq ft PEB/truss sheds delivered.
Logistics & Distribution
Distribution centres and logistics hubs — engineered for fast deployment and long-term durability.
Cold Storage & Specialised
Specialised PEB for cold storage, food processing, and controlled-environment applications.
Structural Steel Sheds
Custom structural steel sheds and truss buildings for varied industrial requirements.
Airport & Infrastructure
PEB and structural steel work for airport hangars, cargo terminals, and public infrastructure.
PEB / Truss Shed — 23,982 Sq Ft
Supply and fabrication of PEB/truss shed — total building size 23,982 sq ft.
100 MT Cement Silo — Teesta III Hydro
Fabrication of 100 MT capacity cement silo for the Teesta III Hydro Electric Project.
Cutting Edge Dia 8000mm
Supply, fabrication and painting of a cutting edge, diameter 8000mm, for Assam project.
Six differences that matter to the engineer running your project.
In-house design
Every project is designed in-house. No outsourced engineering, no delays, no design-fabrication mismatches.
18+ years of fabrication
Established 2007. Subsidiary of National Commerce House (1941). Deep experience across every heavy fabrication category.
Northeast & Bhutan expertise
Delivered across Sikkim, Assam, Meghalaya, Arunachal, Bhutan. Terrain and logistics we understand firsthand.
2,75,000 sq ft workshop
Manufacturing at scale — 8,000 MT annual production capacity across Siliguri, Jaipur and Visakhapatnam facilities.
Certified quality
ISO 9001:2008 certified. Certified welding processes. Documented QA/QC. Full weld and dimensional traceability.
Engineer-to-engineer contact
You talk to the engineer who will design and build your project. No middlemen, no sales-only intermediaries.
Northeast India, Sikkim & Bhutan — plus pan-India delivery.
Our Siliguri base gives us a transportation advantage for tunnel, bridge and PEB projects across the northeastern states, Sikkim, and cross-border into Bhutan. We also deliver nationally from our Jaipur and Visakhapatnam facilities.
- Sikkim
- Bhutan
- Assam
- Meghalaya
- Arunachal Pradesh
- Manipur
- Mizoram
- Nagaland
- Tripura
- West Bengal
- Bihar & Jharkhand
- Pan-India
From your enquiry to delivery at your site — a sequence, not a promise.
Enquiry
Submit an enquiry with your project details — vertical (HTG / Bridge / PEB), specifications, expected timelines. We acknowledge within 4 business hours.
Engineering Consult
An NPEC engineer discusses your requirement in detail — technical specs, project integration, timeline dependencies.
Design & Proposal
Our in-house design team develops the engineering configuration and submits a formal proposal with drawings, timeline, and commercial quote.
Manufacturing
Fabrication at our Siliguri, Jaipur or Visakhapatnam workshop — whichever is closest to your project site for logistical efficiency.
QA/QC & Testing
Documented weld and dimensional inspection. System testing where applicable. Trial assembly and mockup before dispatch.
Delivery & Installation Support
Transportation to site — including cross-border logistics for Bhutan and Northeast projects. On-site installation support from our engineering team.
Awards and certifications that back the work.
ISO 9001:2008
Quality Management System
India 5000 Best MSME
Awards 2024
RED FM North Bengal
Business Awards 2026
Top 10 Steel Fabrication
Industry Outlook 2022
Pride of Nation
Awards 2022
SSMB Awards 2025
1st Runner-up · Special Structure
The questions engineers ask before an enquiry.
A Hydraulic Tunnel Gantry is a mobile formwork system used to cast the concrete lining inside a tunnel. It has a curved steel shell that matches the tunnel profile, mounted on wheels or rails, with hydraulic cylinders that expand the shell against the tunnel walls during pouring and retract it for repositioning. Used extensively in metro tunnels, railway tunnels, road tunnels (NHAI), hydropower headrace and tailrace tunnels, irrigation tunnels, and ventilation tunnels.
NATM Tunnel Gantry, Railway Tunnel Gantry, Irrigation Tunnel Gantry, Hydropower Tunnel Gantry, Hydraulic Ventilation Tunnel Gantry, D-Shape Gantry, and custom-configuration gantries. Every gantry is engineered to project specification — tunnel diameter, profile, cycle time, and hydraulic requirements match your project's requirements.
Highway bridges, railway bridges, cross-border bridges, launching nose and girder fabrication, modular steel bridges, foot and pedestrian bridges, and truss bridges. Our delivered projects include 50m span bridges to Bhutan and 42.5m steel truss bridge for Malana, among others. Bridges are engineered to load specifications and terrain constraints.
Yes. We have delivered multiple projects to Bhutan, including two 50m span steel bridges and the Entry Gate of Bhutan. Our Siliguri base makes cross-border logistics into Bhutan efficient, and our team is experienced with the documentation and delivery processes required for cross-border project execution.
Industrial PEB, warehouse PEB (up to 23,982 sq ft delivered), logistics and distribution centres, cold storage and specialised buildings, structural steel sheds, and PEB for airport and infrastructure applications. Every PEB is designed and fabricated end-to-end from our workshop — no third-party dependency.
Yes. Our Siliguri workshop is well-positioned to deliver PEB structures across the Northeast — Assam, Meghalaya, Arunachal Pradesh, Manipur, Mizoram, Nagaland, Tripura — as well as Sikkim and Bhutan. We have experience with the logistics, transportation and site conditions specific to these regions.
Lead time depends on the project — HTG typically 8–16 weeks, steel bridges 6–14 weeks, PEB 4–12 weeks — from design finalization to dispatch. We share a detailed timeline as part of our proposal after the engineering consultation. Fast-track options are available for urgent projects.
The fastest way is to submit the enquiry form on this page — it goes directly to our engineering team, and you'll hear back within 4 business hours. You can also WhatsApp us at +91 94340 19992 or call the same number. For detailed project briefs, use the enquiry form and mention which vertical you're enquiring about (HTG / Bridge / PEB) so we can route you to the right engineer.
What clients say — verified Google Reviews.
"Good fabrication within schedule time. We do not face any problem during erection. Good job."
"Good following and having seriousness regarding client requirements with quality. I appreciate your work."
"I highly recommend NPEC for their exceptional professionalism, dedication, and innovative solutions, which are unmatched."
"Quality with assured targeted timelines is USP of NPEC. Had a wonderful experience working with them."
Tell us about your project.
Share your project brief — for tunnel gantry, steel bridges, PEB, or any heavy fabrication requirement. We'll get back within 4 business hours with next steps.
- Direct routing to our engineering team
- Response within 4 business hours (Mon–Sat)
- No sales-only intermediaries
- Free engineering consultation with proposal
- References from delivered projects on request