Heavy fabrication, CNC machining and assembly in Tallinn. 160 tonnes. 35 metres. 20 km to the ship.
First In Service OÜ is an Estonian contract manufacturer in Tallinn that delivers heavy fabrication, precision CNC machining to ±0.02 mm and mechanical assembly under a single contract. In one 18,000 m² workshop we build welded and machined products up to 35 × 7 × 7 m and 160 tonnes, certified to EN 1090-2, EN ISO 3834-2 and PED 2014/68/EU. One supplier is responsible for the finished geometry and for the documentation that proves it.
What we do
A simpler supply chain: we plan production capacity around your delivery dates and run three core disciplines under one roof, taking a project from raw material to a fully commissioned system, ready to install.
Scale changes what precision means. A ±0.02 mm tolerance held across a Ø 2,700 mm turned face is a deviation of roughly 0.0007% of the diameter, and the parts carrying it range from 10 kg balanced rotors to 50,000 kg welded marine structures — a delivered weight span of more than 5,000:1. Keeping both ends of that range inside one 18,000 m² building removes the transport, re-fixturing and re-inspection steps that normally sit between a fabricator, a machine shop and a coating hall.
Services
Sheet metal, heavy fabrication & welding
We build heavy fabricated products up to 35 × 7 × 7 m (L×W×H) and 160 tonnes in our 18,000 m² workshop. Every product has full material traceability, and welds are verified by NDT (VT, PT, MT, UT) carried out by certified partners. Welding is certified to EN ISO 3834-2 and EN 1090-2, and our welders use processes including 135/136, TIG and SAW (up to 100 mm).
Precision CNC machining & turning
Tolerances down to ±0.02 mm on heavy components, long shafts and complex geometries. First In Service's machine park turns and mills parts up to Ø 2,700 mm, 13,000 mm long and 4,500 mm high, using heavy-duty FERMAT boring mills (X: 13,500 mm, Y: 4,000 mm), vertical turning lathes (up to Ø 2,700 mm) and horizontal lathes (up to 3,250 mm).
Complex assemblies & mechanical integration
We hand over working systems, ready to install. First In Service builds complex assemblies and fully FAT-tested modules for demanding industrial applications, from precision bearing installations to fully commissioned units, and we assemble, verify and deliver each one with full documentation.
Delivered work, sector by sector
We deliver heavy welded and machined structures to industries worldwide. The sectors below are our core focus, but the same capabilities serve any sector that needs certified precision manufacturing. Figures shown are delivered scope; facility capacity extends to 35 × 7 × 7 m and 160 tonnes.
Marine, offshore & subsea
We machine and fabricate parts for high pressures and corrosive marine conditions, from podded propulsion components to structural elements for offshore platforms. Fabrication, machining and corrosion protection are all done in-house, so the coating is never handed to a third party.
Oil & gas / process equipment
We manufacture certified pressure vessels, tanks, piping modules and skids in strict compliance with PED and international safety standards.
Rotating equipment & energy
Components made to drawing for energy and power generation: dynamically balanced impellers, casings, rotors and shaft systems, plus critical fan and blower components.
Pulp & paper machinery
Precision spare parts and critical process components for mills in continuous production. Our priority is fast, reliable manufacturing that keeps your downtime short.
Built to the tolerance on the drawing, and documented to prove it.
Late deliveries cost revenue and a failed part can stop a plant, so a supplier's claims should be specific enough to check.
We name the standard editions we work to, because they are checkable. Welding quality follows EN ISO 3834-2, currently in its 2021 edition, and structural steel execution follows EN 1090-2. Pressure equipment is designed to EN 13445 under the Pressure Equipment Directive 2014/68/EU, where equipment above the Article 4 category thresholds cannot be CE-marked on a manufacturer's declaration alone. Offshore coating follows NORSOK M-501, in its seventh edition since 2022, which according to Standards Norway targets the ISO 12944-1 very high (VH) durability range — more than 25 years to first major maintenance — and requires Sa 2½ surface preparation with soluble salt contamination below 20 mg/m².
Where a project requires it, work is carried out to classification society requirements — DNV, Lloyd's Register, Bureau Veritas and RINA — with the inspection and documentation scope agreed before the first cut.
Why buyers choose us
Proven in demanding sectors
We are a specialised contract manufacturer and heavy engineering subcontractor delivering precision-welded, machined, and assembled products for demanding industrial applications.
Early DFM review
Before we build to print, our production engineers carry out a Design for Manufacturability (DFM) review to find potential failure points, optimise welding sequences and reduce your overall manufacturing cost.
Certified quality systems
Our operations are certified to ISO 9001, ISO 14001, EN ISO 3834-2 and EN 1090-2, and our documentation complies with PED.
Full material traceability
We guarantee full material traceability from prototype to series production. Weld integrity is verified by NDT (VT, PT, MT, UT) carried out by certified partners.
Scale and lifting capacity
With 18,000 m² of floor space and lifting capacity up to 160 tonnes, we can scale resources to your project timeline and handle very large components.
Heavy-haul port access
Our Tallinn site is 20 km from Muuga Harbour and 60 km from Paldiski Port, with direct heavy-haul road access that avoids city traffic. Oversized components up to 160 tonnes ship roll-on/roll-off to Europe and the Nordics.
Environmental responsibility
Waste, chemical safety and emissions are actively managed as part of our ISO 14001-certified operations.
Standards we operate by
Our certifications keep quality consistent and qualify us for work in regulated industries.
Quality management
Systematic quality across all operations
Environmental management
Minimising environmental impact
Welding quality
Comprehensive quality requirements for fusion welding
Structural steel
Execution of steel structures and aluminium components
Pressure equipment
EU conformity for pressure components
Latest updates
Company news, new capabilities, and project milestones.
News
Digital waybill integration with Planlogi
We have completed integration with the Planlogi e-waybill platform, digitalising all freight documentation. The project was supported by the EU NextGenerationEU Recovery Fund.
Company newsRead more →First In Service at ONS 2026, Stavanger
We exhibited at ONS 2026 in Stavanger, Norway, 24–27 August 2026, at the Estonian Pavilion. Thank you to everyone who visited the stand. Send us your drawings and we will pick up where we left off.
Trade showBring us your toughest tolerances.
Share your technical requirements with our engineers. We will send a firm quote within five working days.
Start your projectDownload capability overview (PDF)Get in touch
First In Service OÜ
Valukoja 12, 11415 Tallinn, Estonia
Key contacts
Contacts
Send us your drawings
Quotes come back faster when the first email is complete. Send what you have directly to either of us: an engineer replies within one working day, and a firm quote follows within five working days.
What to include
- Drawings or a 3D model — PDF, STEP, DWG, DXF, IGES
- Quantity and whether this is a one-off, batch or series
- Material and grade, or the standard it must meet
- Tolerance-critical dimensions, if any
- Required certification: EN 1090-2, PED, class approval, NORSOK
- Target delivery date and destination port
Working under NDA is routine. Ask and we will sign yours before you send anything.
Files too large to email? Say so and we will send a transfer link.
