As pipe specifications are continuously improving as per user needs -- thereby becoming more demanding in terms of quality and efficiency -- seamless pipes rolling technologies have become more sophisticated by incorporating innovative design.
Jesco’s Rolling Line is built on the best available technology – Retained Mandrel Mill (RMM) with three-adjustable rolls stands with five rolling passes.
The Rolling Line consists of a billets cutting saws, a Rotary Heart Furnace for billets with a diameter of 30 m, a cone-type cross roll piercer, five rolling passes with three rolls RMM, a walking beam reheating furnace, a sizing mill with up to 10 passes with three rolls, last stand positions with adjustable rolls, a cooling bed, a straightening machine and pipe cutting saws. The maximum productivity depending on size and steel grade is 120 tonnes/hour. The yearly output for the rolling line is 400,000 tonnes of pipes
The state-of-the-art seamless pipe mill will cover a size range from 139.7 mm till 406.4 mm for OD, with wall thickness starting from 6 mm up to 30 mm. The regional market demands mainly oil country tubular goods (OCTG) pipes and line pipes. Therefore Jesco’s process flow is designed to accomplish API standards requirements as well as supplemental requirements from various oil companies located in Mena.
A heat treatment capacity of 200,000 tonnes per year will allow Jesco to achieve high-strength steel grades, as well as steel grades designed for sour services, considering API 5CT and API 5L all steel grades can be manufactured by Jesco.
Finishing operations are done in two dedicated lines consisting in threading machines, MPI ,Screw make up machine, hydro testing units, coating units and specific controls for threaded and coupled pipes. One of the two finishing lines has the capability to cut premium connections and to apply phosphate on pins. Non-destructive tests are performed in two quality assurance lines including EMI and UT test (electromagnetic and ultrasonic). In-house laboratories able to perform all standard tests as well as dedicated tests (high-collapse and sour-service) will certify the compliance of Jesco’s products. The storages are designed to fit with various process stages purposes, each crane being supplied with wireless terminals. Danieli’s level three software will allow Jesco to optimise all its manufacturing processes, integrating with the purchasing and sales functions. All equipments are manufactured by reputed suppliers as Danieli, Kocks, PMC, Colinet, Bronx and others.
Various automatic control devices are foreseen along the manufacturing lines in order to allow better process control and accurate corrections.
|Physical Tests||Tensile Test ISO 6892 and/or ASTM A 370|
|Grain Size determination McQuaid-Ehn Test or others as specified in ISO 643 and/or
ASTM E 112
|Hardenability - grades C 90 and T 95|
|Hydrostatic Test (including alternative test pressure)|
|Dimensional Measurements (OD, Wt, Length, Thread)|
|Non-DestructiveExamination (NDE) - EMI,UT, MPI|
|Special Tests||Sulfide stresscracking-test; grades C 90 and T 95 ANSI-NACE Test Method TM 0177-96|