The client developed an initiative automated welding/subsea pipe laying vessel, the
largest and first of its kind. Capable of operating in all climatic conditions, for
mobilisation around the globe to provide pipeline infrastructure to the oil and gas
industry.
This structure is loaded onto a purpose made barge, secured and then transported
to a location where a hydraulic roof section mechanically opens to enable vast
pipelines to be loaded and fabricated within the vessel before being laid onto the
ocean bed in a truly impressive scale.
Project Brief
Ambient was employed to develop an HVAC system to provide the internal
temperature control, air pressurisation, extraction and dedicated weld fume extract to
support the process and occupancy.
The vessel is constructed to an off shore marine harsh environment standard and
therefore required a comprehensive level of resilient material, mechanical and
electrical conformity.
Solution
Ambient attended multiple meeting with the client’s design team to understand the
process, requirements, standards, space restrictions and electrical/mechanical
requirements.
From the above the design basis was established then modelled in 3D software to
ensure the plant services and distribution met the required performance within the
highly restrictive space constraints whilst meeting spec.
2 no bespoke marine grade AHU with thyristor electrical heating, modulating chilled
water cooling, filtration and high efficiency VSD supply fan and stainless steel
distribution were provided, along with 2 no Atex rated harsh environment extract
fans, bespoke control panel and field devices to control/condition the process area.
The weld fume extract (LEV) was resolved by working with manufacturing to modify
a standard fume extract system to off shore standard.
Stainless steel ductwork and marine grade hoods were also developed to meet the
specification.
The above was successfully realised within limited budget and timescales.
Ambient scope
Process review
Risk assessment
Design basis
System conformity
Quality plan
Design development
3D CAD modelling
Drawing
Mechanical electrical specifications
Controls design / specifications
Installation of mechanical installation and controls System commissioning witnessed validation
