Yantai Manoir has imported a complete production line for centrifugally cast tubes for which the key equipments are the same than Manoir France. Thus, Yantai Manoir has been able to easier maintain the specificities of Manoir know-how and procedures:

- More than ten France imported centrifugal spinning machines, performing high rotation speed and limited vibrations thanks to the unique foundation and mold designs, can lead to more sound tube structure and longer cast length. Moreover, mold pre-heating automatically infrared controlling temperature units generate the defined thermal gradient on molds, so that the homogeneous solidification and structure on full tube length as well as the required columnar/equiaxe ratios can be guaranteed.

- The brand new plant is equipped with quite a few Italy imported pull-boring machines to replace the push-boring machines, to ensure higher machining surface finish and has minimized the eccentricities of machined tubes. The whole tube loading/unloading systems of these boring machines are now automatic, which helps to achieve a boring capacity of 180-200 tube sections per day, the push-boring machines allow to bore diameters till 400mm.

- France imported CNC controlled automatic TIG welding machines for root passes + automatic MIG machines for filler passes which is used to all long tubes, has secured and made the welding operation reproducible, and make the productivity reach to 50 long tubes per day. It also has minimized the instabilities of welds, and led to the class I RT qualification rate over 99%. In addition, automatic TIG self-fusion of base metal with no filler wires on root passes has also resulted in higher weld properties and more similarities of welds to the base metal.

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