Heavy fabrication, CNC machining & assembly services
First In Service delivers three manufacturing disciplines under one contract from a single 18,000 m² site in Tallinn: heavy fabrication and welding to EN 1090-2 and EN ISO 3834-2, precision CNC machining to ±0.02 mm, and mechanical assembly with factory acceptance testing (FAT). Products run up to 35 × 7 × 7 m and 160 tonnes, with full material traceability from mill certificate to delivery note.
Sheet metal, heavy fabrication & welding
In an 18,000 m² workshop in Tallinn, First In Service builds heavy fabricated products up to 35 × 7 × 7 metres (L×W×H) and 160 tonnes. 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 qualified welders use processes including 135/136, TIG and SAW (up to 100 mm). We specialise in demanding materials such as stainless steel, duplex, super duplex, titanium, Inconel and Hastelloy. Surface treatment is handled in full, from automated shot-blasting to industrial coating systems that meet C5-M and NORSOK M-501, for structures in subsea and offshore service.
Precision CNC machining & turning
Tolerances down to ±0.02 mm on heavy components, shafts and complex geometries. We turn and mill parts up to Ø 2,700 mm, 13,000 mm long and 4,500 mm high on horizontal and vertical CNC lathes, boring mills and milling centres. The machine park includes heavy-duty FERMAT boring mills with up to 13,500 mm of X-axis travel and 4,000 mm of Y-axis travel, vertical turning lathes for diameters up to Ø 2,700 mm and horizontal lathes for workpieces up to 3,250 mm long.
Complex assemblies & mechanical integration
First In Service delivers complex assemblies and fully FAT-tested modules ready to install. From precision bearing installations to fully commissioned units, we assemble, verify and deliver with full documentation. Our assembly team plans sequences, tooling and quality checkpoints in advance so that builds run efficiently and without errors. Every delivery comes with a digital Manufacturing Data Record (MDR) containing material certificates (3.1/3.2), NDT reports, dimensional inspection logs and FAT protocols, so the evidence for regulatory compliance is there from day one.
Dedicated capability pages
Heavy fabrication & welding
Up to 35 × 7 × 7 m and 160 tonnes. EN ISO 3834-2, EN 1090-2, NORSOK M-501 surface treatment.
Heavy fabrication →CNC machining
Ø 2,700 mm, length 13,000 mm, tolerances ±0.02 mm. FERMAT boring mills, VTL, turning centres.
CNC machining →Mechanical assembly & FAT
Mechanical, electrical and hydraulic assembly with factory acceptance testing (FAT) and a full MDR.
Mechanical assembly →Pressure equipment
PED 2014/68/EU certified vessels, tanks, piping modules, and skids.
Pressure equipment →Bring 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)The last 20 kilometres are the easiest.
A 160-tonne component is only useful if it reaches you. Our Tallinn site is 20 km from Muuga Harbour and 60 km from Paldiski Port, with direct heavy-haul road access and no urban bottlenecks. Oversized components go from our shop floor onto roll-on/roll-off vessels without a single permit-critical pinch point, and ship across Europe and the Nordics.
An engineer reads your drawing before anyone quotes it.
We read drawings critically. Every RFQ gets a Design for Manufacturability review by a production engineer, who flags weak points, optimises welding sequences and identifies cost drivers. If the drawing has a problem, you hear about it before you see a price.
Made in the EU, 20 km from a deep-water port.
First In Service manufactures in Tallinn, Estonia, an EU and NATO member state. For buyers rebalancing supply chains away from distant or single-source regions, that means EU origin documentation, no customs complexity inside the single market, short and predictable transit to Nordic and Central European sites, and a facility you can audit in a single day trip.
Nearshoring is not only about politics. A 40-tonne weldment made 400 km from your plant behaves differently in a schedule than the same weldment made 8,000 km away: in lead time, in freight cost and in how quickly a problem gets fixed.
Most buyers don’t want a new supplier. They want to stop depending on one.
Companies rarely contact us because they are unhappy with an incumbent. The usual reasons are single-supplier risk on a critical component, a capacity ceiling during a peak, a supplier qualification programme that needs a second approved vendor, or a part that is chronically late or badly priced.
All four are straightforward to test. Send one to three drawings, ideally of a part that is late, expensive or hard to place. You get a firm number within 5 working days and a clear answer on fit. No qualification audit required to find out whether we are worth qualifying.
Send a pilot RFQ