Procurement of Welding of Production pipe and Demagnetization

Description

The scope of delivery is comprised of: • During removal of the 9 ⅝" (43.5 lb/ft) production string, separate the pipes • Prepare the used 9 ⅝" (43.5 lb/ft) pipe ends with weld seam according to API 5L • Demagnetize pipes for welding • Detailed description of the planned procedure for cutting, prepare and demagnetization of the used pipes • Welding of all connections within 9 ⅝" (43.5 lb/ft) gas production string; depth approx. 1,000 m • All welded pipe connections have to be examined 100% with ultrasonic and x-ray tests. • All C-rings have to be examined 100 % NDT (Magnetic). • The contractor has to deliver a detailed description of the welding procedure of pipes (heat treatment, etc.) and the certificates of the welders prior to starting the work. • A welding supervisor has to be available on site in accordance with DIN EN ISO 14731 (weld-ing coordination - task and responsibilities). • A welding test for the casing including the corresponding destructive examinations has to be performed.