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)


October 2007


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