Loading Winsko Serves Limited

03Services · 09

All services

Mechanical Engineering Construction/Fabrication

Roads, civil & mechanical. Roads and civil engineering construction on land and at the waterside, and mechanical construction and fabrication in Winsko's own covered workshop.

Get a quote Get in touch

The service

Fabricated under cover, erected on site.

Winsko's fabrication workshop sits on its base at Trans-Woji, Port Harcourt: a roofed bay with a 50-ton overhead crane, a 75-ton hydraulic press, welding, cutting, blasting and painting equipment.

It builds steelwork and piping for the oil and gas jobs, from platform decks, drain platforms and helipad mesh to manifolds, skids, spools and flow station piping. It has also built Winsko's own tug boats, house boats and barges, and the company profile lists more under construction.

Clients lease the workshop to carry out their own fabrication, and it is often busy with both. Finished work goes straight from the bay to the jetty and onto Winsko's barges.

Inside the fabrication workshop: a yellow overhead travelling crane spans the bay above welding generators
Fabrication workshopPhotograph

Where it sits in the project lifecycle

  1. 01Engineering / Design
  2. 02Procurement & Logistics
  3. 03Fabrication
  4. 04Construction / Roads / Erection / Installation
  5. 05Testing / Pre-Commissioning
  6. 06Commissioning
  7. 07Operation, Maintenance & Handover

By the numbers

50 t
Overhead crane
Spanning the fabrication bay
75 t
Hydraulic shop press
For bending, pressing and straightening
27
Welding machines
Lincoln, Miller and Daewoo, 220 to 600 A
34
Electric cutters
From 2-inch to 9-inch, with oxy-acetylene sets

Scope of work · 06 work packages

What the work covers.

  • 01

    Structural steel

    Platform decks, drain platforms, walkways, ladders, helipad structures and mesh.

  • 02

    Piping, spools and skids

    Spools, manifolds, headers, metering and equipment skids and flow station piping, welded to procedure.

  • 03

    Mechanical erection

    Equipment, piping and manifolds set and connected on site, tanks and their appurtenances erected, and scaffolding put up to reach the work.

  • 04

    Vessels and boats

    Barges, tug boats and house boats, built in Winsko's own yard.

  • 05

    Surface preparation and painting

    Blast cleaning and airless spraying of protective coatings.

  • 06

    Workshop hire

    The workshop and its crane leased to clients for their own fabrication.

Method · 06 stages

From the drawing to the jetty.

How a fabrication job runs through the workshop, with the checks that close each stage.

  1. 01

    Drawings and cutting list

    Shop drawings are checked against the design, and a cutting list is drawn up with the material grades and the welding procedures each joint will use.

    • Drawings approved
    • Material grades confirmed
    • Welding procedures assigned
  2. 02

    Cutting and preparation

    Plate, section and pipe are cut, bevelled and cleaned, and every piece is marked so it can be traced back to its certificate.

    • Cut sizes checked
    • Bevels to the procedure
    • Heat numbers transferred to each piece
  3. 03

    Fit-up and welding

    Pieces are fitted, tacked and checked before welding by qualified welders, under the overhead crane for the heavy assemblies.

    • Fit-up checked before welding
    • Preheat and consumables controlled
    • Welds logged to the welder
    Fabricator grinding the flange of an upright pipe spool in a steel shed, sparks in the air
    Spool fabricationIllustration
  4. 04

    Inspection

    Welds and dimensions are inspected, and any repairs are made and inspected again before the piece moves on.

    • Visual and NDT as specified
    • Dimensions against the drawing
    • Repairs re-inspected
  5. 05

    Blasting and painting

    Steel is blast-cleaned and coated with airless spray to the paint system the client specifies.

    • Surface profile and cleanliness checked
    • Coating thickness measured
    • Cure before handling
    Fabrication workshop bay with overhead crane and welding generators
    Workshop bayPhotograph
  6. 06

    Load-out

    The finished work is lifted out of the bay and taken to the jetty for loading onto the barge, or collected by the client.

    • Lift plan for heavy pieces
    • Protection for coated surfaces
    • Records handed over with the steel
    Two workers handling a fabricated steel frame on the deck of a barge, the river behind
    Fabricated steel on a barge deckPhotograph

Plant and equipment

What is in the workshop.

Workshop plant from Winsko's equipment register.

Overhead crane
50 t
Hydraulic shop press
75 t
Welding machines
27 units, 220 to 600 A
Electric cutters
34, from 2" to 9" (DeWalt)
Blasting machines
Atlas Copco and Basfer Milan
Airless sprayers
2 × Graco
Machine shop
Milling, refacing and sharpening machines
Compressors
Ingersoll-Rand, 600 and 450 CFM
Overhead crane spanning the workshop bay
Overhead cranePhotograph
Workshop bay with welding generators
Workshop bayPhotograph
House boat built in Winsko's yard
Built in the yard: house boatPhotograph

Track record

Fabrication and mechanical works on record.

A selection from the list of jobs in the company profile.

  1. 2023Metal container installed at the loading gantryAjoki
  2. 2019Platform repairs, Well 7Alakiri
  3. 2018Corroded on-plot piping refurbishment, phases A and BCawthorne Channel 3 flow station
  4. 2017Mechanical installation of the gas-lift manifold and piping system at the gas plantCawthorne Channel
  5. 2017Refurbishment of flow station engines, pumps and fan belt guardsCawthorne Channel 1
  6. 2017Replacement of corroded helipad safety meshCawthorne Channel
  7. 2017Utility house platform, drain system and pump generator area refurbishmentKrakama flow station
  8. 2017Inlet manifold ligament piping, skids and associated structureKrakama flow station
  9. 2014FLKO and PDV drain platform deck worksDiebu Creek flow station
  10. 2013Well 11 ligament fabricationNun River

Inspection and testing

Traceable from plate to paint.

Fabricated steel carries its records with it: where the material came from, who welded it, how it was inspected and what it was painted with.

01Material traceabilityEvery piece matches its certificateWhenFrom cutting onwardRecordHeat number transfer log
02Welding proceduresProcedures and welders are qualifiedWhenBefore productionRecordWPS, PQR, welder records
03Fit-up inspectionJoints are aligned and gapped correctly before weldingWhenEvery jointRecordFit-up checks
04Weld inspectionNo rejectable defectsWhenEvery weldRecordVisual and NDT reports
05Dimensional checkThe piece matches the drawingWhenBefore paintingRecordDimensional report
06Coating inspectionSurface preparation and paint thickness meet the systemWhenEach coatRecordCoating report

Codes commonly specified for this work

  • AWS D1.1Structural welding
  • ASME IXWelding qualifications
  • ASME B31.3Process piping
  • ISO 8501-1Blast cleaning grades
  • ISO 12944Protective paint systems
  • ISO 5817Weld quality levels

Health, safety and environment

A busy workshop, kept safe.

Cutting, welding, grinding, lifting and blasting all happen under one roof. Each has its own controls.

  • 01

    Hot work

    Screens around welding bays, fire watch, extinguishers and combustibles cleared away.

  • 02

    Overhead crane

    Trained operators, certified rigging, inspected crane and no one under the load.

  • 03

    Grinding and cutting

    Guards on every tool, face shields and gloves, and sparks directed away from people.

  • 04

    Blasting and painting

    Blast and paint areas kept apart, respiratory protection and ventilation.

  • 05

    Fumes

    Extraction and ventilation in the bay, and gas testers in use.

  • 06

    Manual handling

    Lifting aids, chain blocks and the crane used instead of hands for heavy pieces.

Our HSE approach

FAQ · 04 questions

Questions, answered.

Short answers about mechanical engineering construction/fabrication at Winsko, from the company profile.

01

What does Winsko fabricate?

Platform decks, drain platforms, walkways, helipad structures and mesh, piping spools, manifolds, headers, metering skids and flow station piping, plus barges, tug boats and house boats for its own fleet.

02

Does Winsko carry out mechanical erection on site?

Yes. Winsko has installed a gas-lift manifold and piping system at the Cawthorne Channel gas plant (2017), refurbished flow station engines and pumps, and installed a metal container at a loading gantry (2023).

03

What is in the Winsko fabrication workshop?

A covered bay on the Trans-Woji base in Port Harcourt with a 50-ton overhead crane, a 75-ton hydraulic press, 27 welding machines, 34 electric cutters, oxy-acetylene sets, blasting machines and airless spray units.

04

Can I hire the Winsko workshop?

Yes. Clients lease the workshop and its crane to carry out their own fabrication, and finished work goes straight from the bay to the jetty.

Also in the scope

07Start a project

Winsko Serves Limited

Have a project
to build?

Get a quote

Tell us the scope, the site and the schedule. Flowlines and pipelines, facility maintenance, wellhead platforms, civil or mechanical works, procurement or equipment on lease: our team in Port Harcourt will prepare a quote.

We can do it for you. Try us.

Start with a service

Each one opens the quote form with that service already chosen.

Operational base / jettyElshcon Close, Trans-Woji (Slaughter), Port Harcourt, Rivers State

See it on the map