Rectangular ductwork
Auto-folded duct and fittings in all stocked materials and gauges, ticketed for assembly on site.
Ducting & piping contractor
Ductwork and piping, built to exacting tolerance
Rectangular and spiral ductwork, process ventilation, pipe spools, racks and equipment hook-up — fabricated in our own Johor Bahru workshop and installed by our crews onshore and offshore across South East Asia.
80″Max fitting diameter
13Gauge material capacity
6.3tOverhead crane, in-house
8.5kmTo heavy-haulage route
Core discipline one — ducting
HVAC rectangular & spiral ductwork, process ventilation, rooftops
CAD generated drawings and barcode ticketing, so every component is traceable from the shop floor to its position on site.
Auto Fold and CNC machines fabricate up to 13-gauge material, with fittings to 80″ diameter. All materials and gauges held in stock.
Ducting systems we build
From a single fitting to a complete ventilation system
Drawn, cut, formed and labelled in-house, then delivered as a numbered kit — so crews install rather than sort parts.
Spiral ductwork
Spiral duct and fittings up to 80″ diameter, gored and welded on purpose built machines.
Process ventilation
Dust collection makeup air, pneumatic conveying and fans for heat control.
Rooftop HVAC
Crane trucks and crews for new units or change-outs, curb adapters, roofing and start-up.
Core discipline two — piping
Pipe spools, headers and manifolds — fabricated here, installed by our crews
Process and utility piping from isometric to hydrotest — welded in screened bays under the same crane as our ductwork, then erected, tested and handed over by the same company.
Carbon steel through to chrome moly, duplex and SAF, clad plate and exotics, on certified weld procedures for high pressure and temperature applications.
JOVA was awarded the piping fabrication and installation works for RFCC 2 on RAPID P1 Onshore, as piping subcontractor.
Piping work done
Our pipework, in the shop and on site
Spool and manifold fabrication, purge welding, hook-up, racks and below-grade chambers.
Ducting work done
Our ductwork, on site
Rectangular mains, insulated risers, transitions and supports.
Supporting disciplines
Everything around the duct and the pipe, from the same contractor
Steel, insulation, scaffolding and shutdown crews in-house — no sub-let interfaces.
Piping
Spools, headers and manifolds fabricated in our workshop, then erected, tested and handed over by our own crews.
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Structural
Site construction, erection and installation. Plate rolling and heavy wall sections, fan housings and modules.
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Insulation & refractory
Hot and cold, thermal and A60, sound barrier and prefabricated cladding — plus refractory to boilers, incinerators and furnaces.
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Maintenance & shutdown
Certified welding, fitting, machining, rigging, scaffolding, coatings and abseiling — with FPSO and platform hook-up experience.
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Asbestos abatement
Survey, removal, air monitoring, encapsulation, decontamination and disposal. Fully licensed, with a Waste Handlers Licence.
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Facilities management
Total FM for condominiums, commercial and industrial premises — M&E and HVAC plant, plumbing, building fabric, cleaning, security and grounds under one contract.
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Manpower supply
Sourcing, screening, work pass application and onboarding — professional to general workers, onshore and offshore.
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Our facility
Fabrication under our own roof
A workshop at Permas Sentral, Johor Bahru, with CNC plasma cutting, a 6.3 tonne overhead travelling crane, an automated ductwork line and screened pipe spool bays.
A heavy haulage route 8.5 km away carries loads to Johor Port or Singapore. We have barged and shipped work across South East Asia.
Commitment to safety
Complete each job to the client’s satisfaction — and go home safe at the end of every working day.
Our crews work at height, in confined spaces and in extremes of temperature. Risk mitigation is comprehensive and audited, with personnel involved at every level.
Quality assurance
Inspection and testing to a bespoke plan, on every project.
Accredited to ISO 9001 UKAS Management Systems. QC personnel work alongside production against a bespoke inspection and test plan, and a Production Data Record Book is produced for every project.
Strategic partnership
Larger piping and pipeline packages, delivered together
For scopes beyond a single workshop, JOVA works in strategic partnership with Seven Star Hills Sdn Bhd — adding pipeline fabrication, offshore support, rotating and static equipment installation, precision machining and turnkey EPCC delivery.
One enquiry can then cover duct, pipe, structure and equipment, without the client assembling that chain themselves.
Seven Star HillsSdn Bhd
Industrial engineering, fabrication and turnkey project delivery. Established 2005. Masai, Johor.
- Piping & pipeline
- Marine & offshore
- EPCC
- Machining
Send us your drawings
Duct layouts, isometrics or both. Tell us the system, the materials and the programme — we’ll come back with a proposal.