Our capabilities

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 FAT testing. Products run up to 35×7×7 m and 160 tonnes, with full material traceability from mill certificate to delivery note.

01

Sheet metal, heavy fabrication & welding

Eliminate structural weak points with certified precision. Operating across an 18,000 m² workshop area in Tallinn, First In Service delivers heavy fabricated products up to 35×7×7 meters (L×W×H) and 160 tonnes. Quality is rigorously verified through full material traceability and NDT (VT, PT, MT, UT) performed by certified partners. Backed by EN ISO 3834-2 and EN 1090-2 certifications, our highly qualified welders utilise advanced processes including 135/136, TIG, and SAW (up to 100 mm). We specialise in complex materials such as stainless steel, duplex, super duplex, titanium, Inconel, and Hastelloy. Complete surface treatment, from automated shot-blasting to industrial coating systems compliant with extreme anti-corrosion standards (C5-M, NORSOK M-501), ensuring your structures survive the harshest subsea and offshore environments.

EN ISO 3834-2 & EN 1090-2 certified
18,000 m² workshop area
Products up to 35×7×7 m / 160 tonnes
135/136, TIG, SAW (up to 100 mm)
NDT: VT, PT, MT, UT
Surface treatment (C5-M, NORSOK M-501)
Stainless steel, duplex, Inconel, Hastelloy
PED documentation compliance
Sheet metal, heavy fabrication & welding
02

Precision CNC machining & turning

Tolerances down to ±0.02 mm, built to perform flawlessly under extreme stress. Our extensive machine park is built for heavy components, long shafts, and complex geometries. We handle turning and milling of parts up to Ø 2,700 mm, 13,000 mm in length, and 4,500 mm in height. Our capabilities are powered by advanced horizontal and vertical CNC lathes, boring mills, and milling centres — including heavy-duty FERMAT boring mills with X-axis travel up to 13,500 mm and Y-axis up to 4,000 mm, vertical turning lathes accommodating up to Ø 2,700 mm, and horizontal lathes supporting workpieces up to 3,250 mm in length.

Parts up to Ø 2,700 mm
Length up to 13,000 mm
Height up to 4,500 mm
Shafts L 3,250 mm, Ø up to 1,000 mm
Heavy component machining
Complex geometries
Balancing of rotating parts
Precision CNC machining & turning
03

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. Our assembly team plans sequences, tooling requirements, and quality checkpoints for efficient, error-free builds. Comprehensive quality documents: we deliver fully transparent, digitised Manufacturing Data Records (MDR), including material certificates (3.1/3.2), NDT reports, dimensional inspection logs, and FAT protocols, ensuring immediate regulatory compliance.

Complex assemblies
FAT-tested modules
Precision bearing installations
System commissioning
MDR & quality documentation
Ready-to-install delivery
Complex assemblies & mechanical integration
Full specifications

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.

Full spec →

CNC Machining

Ø 2,700 mm, length 13,000 mm, tolerances ±0.02 mm. FERMAT boring mills, VTL, turning centres.

Full spec →

Mechanical Assembly & FAT

Mechanical, electrical, and hydraulic assembly with FAT testing and full MDR documentation.

Full spec →

Pressure Equipment

PED 2014/68/EU certified vessels, tanks, piping modules, and skids.

Full spec →

Bring 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)
Heavy logistics

The last 20 kilometres are the easiest.

A 160-tonne component is only useful if it reaches you. Our Tallinn site sits 20 km from Muuga Harbour and 60 km from Paldiski Port, with direct heavy-haul road access and no urban bottlenecks. Oversized components roll from our floor to roll-on/roll-off vessels without a single permit-critical pinch point, and ship across Europe and the Nordics.

Engineering review

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: weak points flagged, welding sequences optimised, cost drivers identified — before the price is on paper. If the drawing has a problem, you hear about it before the price does.

EU origin

Made in the EU, 20 km from a deep-water port.

First In Service manufactures in Tallinn, Estonia — an EU member state and NATO member. 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.

Second source & overflow capacity

Most buyers don’t want a new supplier. They want to stop depending on one.

The common reasons companies contact us are not dissatisfaction with an incumbent. They 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 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
At a glance

First In Service in numbers

Experience: Manufacturing since 2002, First In Service OÜ registered 2010
Facility: 18,000 m² single-site workshop, Valukoja 12, Tallinn, Estonia
Maximum product: 35 × 7 × 7 m (L×W×H), 160 tonnes
CNC envelope: Ø 2,700 mm, length 13,000 mm, tolerance ±0.02 mm
Welding: 135/136, TIG, SAW up to 100 mm — EN ISO 3834-2, EN 1090-2
Certifications: ISO 9001, ISO 14001, EN ISO 3834-2, EN 1090-2, PED 2014/68/EU
Surface treatment: Shot-blasting and coating to NORSOK M-501, C5-M
Logistics: Muuga Harbour 20 km, Paldiski Port 60 km, heavy-haul road access
Response: Reply within 1 business day, firm quote within 5 working days
FAQ

Questions buyers ask

What services does First In Service provide?

Heavy fabrication and certified welding, precision CNC machining, and complex mechanical assembly with FAT testing — deliverable separately or as one integrated contract from a single Tallinn facility.

Can First In Service handle a complete contract from raw plate to commissioned unit?

Yes. Fabrication, machining, surface treatment, assembly, and Factory Acceptance Testing all happen in one 18,000 m² facility under one contract and one quality system.

What welding processes and certifications does First In Service use?

Processes 135/136 (MIG/MAG), TIG, and SAW with penetration welding up to 100 mm, certified to EN ISO 3834-2 and EN 1090-2.

What is the CNC machining envelope?

Parts up to Ø 2,700 mm diameter and 13,000 mm length, with tolerances down to ±0.02 mm.

Does First In Service provide surface treatment?

Yes — automated shot-blasting and industrial coating systems compliant with NORSOK M-501 and C5-M anti-corrosion standards.

What documentation ships with a delivery?

A Manufacturing Data Record: EN 10204 3.1 material certificates (3.2 on request), NDT reports, dimensional inspection logs, and FAT protocols where scope requires.

In brief

160 tonnes. 35 metres. 20 km to the ship. Heavy fabrication, precision machining and mechanical assembly under one accountable scope. One supplier owns the finished geometry — and the documentation that proves it.

At a glance

Sectors served

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. Weight: 100 kg – 50,000 kg. Envelope: Up to 25 × 5 × 5 m (L×W×H). Materials: Marine-grade steels, carbon steel, stainless steel, duplex / super duplex. Surface treatment: NORSOK M-501 and C5-M, applied in-house. Class approvals: DNV, Lloyd's Register, Bureau Veritas, RINA — scope per project. Inspection: VT, PT, MT, RT.
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. Design: EN 13445 / PED 2014/68/EU. Weight: 200 kg – 25,000 kg. Envelope: Up to 25 × 5 × 5 m (L×W×H). Materials: Carbon steel, stainless steel, duplex, super duplex. Inspection: VT, PT, MT, RT.
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. Weight: 10 kg – 5,000 kg. Envelope: Ø500 – Ø4,000 mm. Balancing: Up to Ø4,000 mm. Materials: Carbon steel, stainless steel, duplex / super duplex, titanium. Inspection: VT, PT, MT, RT.
Pulp & paper machinery
Precision spare parts and critical processing components for continuous production environments. Our priority is minimising your downtime through rapid, reliable manufacturing. Design: EN 13445 / PED 2014/68/EU. Weight: 200 kg – 25,000 kg. Envelope: Up to 25 × 5 × 5 m (L×W×H). Materials: Carbon steel, stainless steel, duplex. Inspection: VT, PT, MT, RT.
Mining & machine building
Heavy-duty machine building assemblies engineered for extreme conditions, using wear-resistant materials precision-machined to withstand high-impact, abrasive environments in the mining sector. Components: Machine assemblies, structural frames, conveyor elements. Materials: Hardened and wear-resistant steels. Conditions: High-impact, abrasive environments. Inspection: VT, PT, MT.
Defence
Precision manufacturing of highly regulated, mission-critical components for the defence sector. Full traceability, strict quality control, and compliance with defence industry specifications. Focus: Mission-critical precision components. Requirements: Full traceability, strict QC, defence specifications. Capabilities: Welding, machining, assembly to military standards.

Why buyers choose us