Chakan heavy fabrication works
Pune, Maharashtra · Heavy fabrication and assembly
46,000m²
Capacity
14 steam generators per year
Principal equipment
- 250 t EOT cranes ×4
- CNC deep-hole boring (12 m)
- Electron-beam welder
- 28 m stress-relief furnace
ManufacturerNuclear power generation
Kavach Heavy Engineering
ASME III pressure equipment and heavy fabrication for reactor islands.
SupplierVerifiedFeaturedNuclear experience
1994
Founded, Pune
- Team size
- 1,000–2,500
- Turnover
- ₹1,850 cr
- Listings
- 3
- Certifications
- 4
- References
- 3
- Facilities
- 2 · 57,500 m²
Banner: a reactor containment building under construction, ringed by tower cranes — industry photography, not Kavach Heavy Engineering’s own site.
01
About
Kavach fabricates Class 1 and Class 2 pressure equipment for reactor islands — steam generators, pressurisers and primary piping spools — from a single 46,000 m² works outside Pune. The shop holds an N-stamp, runs its own qualified welding school, and has supplied the PHWR fleet continuously since the late nineties.
- Organisation type
- Manufacturer
- Industry sector
- Nuclear power generation
- Headquarters
- Plot 14, Chakan Industrial Area, Phase II, Pune 410501
- Locations
- Pune · Nashik · Mumbai
- Export markets
- United Arab Emirates · France · South Korea · Vietnam
- Annual turnover
- ₹1,850 cr
- On the register since
- 11 Feb 2026
02
Capabilities
How this organisation is classified on the register — and therefore how buyers find it.
Product & service categories
03Capabilities
04Manufacturing processes
0303
Products & services
2 products and 1 service published. Each is searchable on its own.
- 01Product
Vertical steam generator, 180 MWt
Heat exchangers and steam generators
Vertical U-tube steam generator for PHWR and small modular units, fabricated to ASME Section III Class 1 with Inconel 690 tubing and integral moisture separators.
- Thermal duty
- 180 MWt
- Design pressure
- 11.2 MPa primary / 5.4 MPa secondary
- Design temperature
- 343 °C
- Tube material
- Inconel 690 TT
- Tube count
- 3,860
- Dry mass
- 214 t
- Overall length
- 11.4 m
Standards ASME BPVC Section III Division 1 · ASME NQA-1 · RCC-M (on request)
Applications PHWR primary heat transport · Bharat Small Reactor · Research reactor secondary circuit
- 02Product
Primary piping spool assemblies
Piping, spools and fittings
Pre-fabricated primary heat transport spools with integral feeders, supplied hydro-tested, pickled and capped with foreign material exclusion covers fitted.
- Diameter range
- DN 50 to DN 600
- Wall thickness
- Up to 86 mm
- Material
- SA-106 Gr C, SA-312 TP304L/316L
- Bend radius
- 1.5 D minimum, induction bent
- Surface finish
- Pickled and passivated, Ra 1.6 µm
Standards ASME BPVC Section III Division 1 · ASME B31.1 · AERB/SS/CSE-1
Applications Primary heat transport · Feeder replacement · Emergency core cooling
- 03Service
Qualified welding and cladding services
Qualified welding and cladding
Shop and site welding to qualified procedures, including Inconel weld overlay cladding and dissimilar-metal joints, with in-house welder qualification and a procedure library of 340 WPS.
- Processes
- GTAW, SMAW, SAW, narrow-gap orbital
- Qualified procedures
- 340 WPS on file
- Welders
- 180 qualified, ASME IX
- Cladding
- Inconel 600/690 weld overlay
Standards ASME BPVC Section IX · ASME BPVC Section III · ISO 3834-2
Applications Pressure vessel fabrication · Site repair · Overlay cladding
04
Certifications
A lapsed certificate is shown as lapsed rather than passing as valid.
- 01ASME N / NPT certificateIssued by ASMEValid to 31 Mar 2028
- 02ISO 19443Issued by Bureau VeritasValid to 30 Nov 2027
- 03ISO 9001Issued by Bureau VeritasValid to 30 Nov 2027
- 04AERB registrationIssued by AERBValid to 15 Jan 2029
05
Facilities
2 sites, 57,500 m² under roof. This is the section buyers read closest.
Nashik precision machining centre
Nashik, Maharashtra · Precision machining
11,500m²
Capacity
3,200 machined components per year
Principal equipment
- 5-axis horizontal machining ×9
- CMM (2 µm)
- Vacuum heat treatment
06
Nuclear experience
Project references published by the organisation. The strongest thing on any profile.
Bharat Small Reactor demonstrator — module shells
2026Prototype module shell fabrication and qualification coupons
- Country
- India
- Role
- Development partner
Module shellsQualification couponsBarakah O&M spares programme
2024Replacement pressure-retaining components under long-term agreement
- Country
- United Arab Emirates
- Role
- Approved vendor
Heat exchanger bundlesValve bodiesKakrapar Units 3 & 4 — primary heat transport
2021Fabrication, hydro-testing and site delivery of primary piping spools
- Country
- India
- Role
- Tier 1 fabricator
Primary piping spoolsFeeder assemblies
07
Events attended
- India Nuclear Energy Forum 2026Mumbai, India · 29 May 2026Exhibitor
08
Send an enquiry
Enquiries reach Devendra Kulkarni, Head of Nuclear Quality. You need an INF membership to send one — any individual tier, or a company package.
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