Qatar Gas 3 & 4 Onshore Project Storage Tanks Works in Ras Laffan


Qatar Liquefied Natural Gas Company Limited (3), Qatar Petroleum & Shell Gas-Power Development B.V

Role of BUTEC

Subcontractor to Chiyoda / Technip J.V. (CTJV)

Commencement Date

October 2007

Completion Date

April 2010

Scope of Work

EPC contract for the construction of 25 steel tanks for the storage of chemical products with diameters up to 21.4 m and heights up to 25.5 m

Project Description

  • Full and detailed tank design according to API 650 addendum 4 and Qatar Gas special requirements
  • Design, fabrication, and installation of internal and external steam heating coils for several tanks
  • Welding procedures specification and procedures qualification records
  • Quality plan
  • Procurement and inspection of materials (plates CS & SS, structural profiles, shell & roof nozzles, internal piping CS & SS, PV vents, insulation and painting)
  •  Fabrication, testing, packing, transportation and handling
  • Erection and non destructive testing including ladders, platforms, pipe supports & spiral staircases
  • Insulation and external and internal surface treatment works
  • Pre-commissioning and commissioning