ÜMRAN ÇELİK BORU SANAYİİ A.Ş. is a specialist producer of linepipes for oil and gas projects, water trunk pipelines, and offshore piling projects worldwide. Production of steel pipes by Ümran is done using 3 methods: 1. Longitudinally sublerged arc welding (LSAW) 2. High Frequency Induction (HFI) 3. Helical submerged arc welding (HSAW) Umran management systems and facilities are certified to well known international standards in terms of Quality Management, Environmental Management and Occupational Health and Safety Management.