160 tonnes. 35 metres. 20 km to the ship.
First In Service OÜ is an Estonian contract manufacturer in Tallinn delivering heavy fabrication, precision CNC machining to ±0.02 mm and mechanical assembly under one accountable scope. From an 18,000 m² single-site 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 owns the finished geometry — and the documentation that proves it.
What we do
Simplify your supply chain with a flexible, customer-centric manufacturing partner. We adapt our production capacity to your specific timelines, offering three core disciplines under one roof to take your project from raw material to a fully commissioned, ready-to-install system.
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
Eliminate structural weak points with certified precision. Operating across an 18,000 m² workshop area, we deliver heavy fabricated products up to 35×7×7 m (L×W×H) and 160 tonnes. Quality is verified through full material traceability and NDT (VT, PT, MT, UT) by certified partners. Backed by EN ISO 3834-2 and EN 1090-2 certifications, our welders utilise processes including 135/136, TIG, and SAW (up to 100 mm).
Precision CNC machining & turning
Tolerances down to ±0.02 mm, built to perform flawlessly under extreme stress. First In Service's machine park handles heavy components, long shafts, and complex geometries — turning and milling parts up to Ø 2,700 mm, 13,000 mm in length, and 4,500 mm in height. Powered by 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
Plug-and-play delivery. We hand over working systems, not just a box of parts. First In Service delivers complex assemblies and fully FAT-tested modules for demanding industrial applications. From precision bearing installations to fully commissioned units, we assemble, verify, and deliver with full documentation.
Challenges conquered across sectors
Delivering heavy welded and machined structures to global industries where failure is not an option. These are our core focus areas — our capabilities extend far beyond to any sector that demands 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 built to withstand extreme pressures and corrosive marine conditions. From podded propulsion components to structural elements for offshore platforms. Fabrication, machining and corrosion protection are all carried out in-house — the coating is not handed to a third party.
Oil & gas / process equipment
Built to safely contain and control extreme industrial forces. We manufacture certified pressure vessels, tanks, piping modules, and skids, ensuring strict compliance with PED and international safety standards.
Rotating equipment & energy
Custom-manufactured components for the energy and power generation sectors, including dynamically balanced impellers, casings, rotors, and shaft systems, alongside critical fan and blower components.
Pulp & paper machinery
Precision spare parts and critical processing components for continuous production environments. Our priority is minimising your downtime through rapid, reliable manufacturing.
We don't just build components. We build to documented tolerances.
When late deliveries mean lost revenue and failed parts mean catastrophic downtime, you need a manufacturing partner that leaves nothing to chance.
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 high-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.
Proactive DFM engineering
We don't just blindly follow blueprints. Our production engineers conduct rigorous Design for Manufacturability (DFM) reviews to identify potential failures, optimise welding sequences, and reduce your overall manufacturing costs.
Certified quality systems
Our operations strictly adhere to ISO 9001, ISO 14001, EN ISO 3834-2, and EN 1090-2 standards, alongside PED documentation compliance.
Full material traceability
We guarantee full material traceability from prototype to series production. Final weld integrity is ensured via comprehensive NDT (VT, PT, MT, UT) conducted through certified partners.
Scale and lifting capacity
With 18,000 m² of space and lifting capacity up to 160 tonnes, we easily scale resources to fit your project's timeline and massive dimensional requirements.
Seamless heavy logistics
Strategically located in Tallinn just 20 km from Muuga Harbour and 60 km from Paldiski Port. We offer direct, heavy-haul road access without urban bottlenecks, ensuring seamless roll-on/roll-off shipping for oversized 160-tonne components across Europe and the Nordics.
Environmental responsibility
Active waste, chemical safety, and emissions management built into our ISO 14001 certified operations.
Standards we operate by
The highest certifications ensure consistent quality and open doors to 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've completed integration with the Planlogi e-waybill platform, digitalizing all freight documentation. 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 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'll deliver 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 to either of us directly — an engineer replies within one business 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.
