Offshore Temporary Steelwork
A large offshore temporary-steelwork programme associated with the offshore gas development, involving 120+ tonnes of fabricated steel. This is presented as affiliated group experience, see the note below for how Costro’s role is defined.
Project Facts
This offshore scope reflects collective, affiliated group management experience delivered with our partners through our sister company, Rais Naser. It is presented as group experience and does not represent a direct contract held by Costro Projects Management LLC. Within offshore temporary steelwork, Costro’s role is limited to fabrication, procurement and quality only.
Delivered Across Multiple Disciplines
Within this group programme, the work attributable to Costro’s disciplines centred on fabrication, procurement and quality.
Temporary Steelwork Fabrication
Fabrication of offshore temporary steelwork and transport supports, totalling 120+ tonnes.
Padeyes & Lifting Points
Fabrication of padeyes and lifting attachments to issued engineering drawings.
Procurement
Procurement of steel, consumables and certified materials for the fabrication scope.
Quality · ITP & NDT
Inspection and Test Plans, NDT and documented quality control throughout fabrication.
Material Traceability
Full material traceability and certification records maintained for the steel package.
Clear Responsibilities
What Costro Provides
- Fabrication of temporary steelwork
- Procurement of materials & consumables
- Quality assurance · ITP, NDT, traceability
- Workshop fit-up & preparation
What Costro Does Not Provide
- Engineering & structural design
- Transport, lifting & sea-fastening calculations
- Marine / naval engineering
- Offshore installation & marine spread
Project Detail
Scope of Work
- Fabrication of temporary offshore steelwork
- Fabrication and supply of heavy transport beams (HEB 400)
- Material procurement
- In-house QA and inspection control
Technical Details
- 120+ tonnes fabricated steel
- Beam section: HEB 400
- Beam lengths: 5 m & 8 m
- Beam width: 600 mm
Materials & Specifications
- Material grade: S355JR
- Coating: epoxy primer ≈100µm
- Joint type: single-bevel groove
- Full material traceability maintained through to delivery
Engineering Approach
Fabrication and procurement were run in parallel against the programme's fixed offshore mobilisation window. Welding was carried out by qualified welders using SMAW & FCAW processes, following approved procedures (WPS/PQR) in accordance with AWS D1.1.
Quality & Inspection
- QA managed in-house across fabrication and procurement
- Third-party controlled inspection
Results & Outcome
More than 120 tonnes of temporary offshore steelwork and heavy transport beams fabricated and delivered to schedule and specification for a major offshore gas development.