Russian United Metallurgical Company OMK has shipped a batch of 14 bellows expansion joints in December 2021 for the Rooppur nuclear power plant, which is being built by Rosatom in the Republic of Bangladesh. Eight expansion joints were delivered in a non standard design. The products were manufactured at the OMK Belgorod plant, Belenergomash BZEM. The designers of the enterprise have developed for ordering two types of balanced bellows expansion joints, which are used to level the shear displacements of pipelines. The first type of expansion joint, which was developed on the basis of the existing standard design, has a length of 1500 mm.For the second type, it was necessary to reduce the overall length of the finished product to 1000 mm. This problem was solved by abandoning heavy and oversized forgings in favor of blanks from heavy-plate metal rolling, which are used in the design of the finished product. As a result, the length of the expansion joint was reduced by a third up to 1000 mm.To confirm the required characteristics, two samples were made at the plant and tested at the stand of the Test Center for the production of bellows expansion joints of the Belgorod OMK plant. The head samples successfully withstood all loads - cyclic, axial, shear displacements. After tests at the plant, a batch of bellows expansion joints was manufactured, which were handed over to representatives of authorized organizations without any complaints.All expansion joints were covered with green organ silicate enamel. It has high radiation resistance, is resistant to decontamination solutions and is capable of withstanding hot steam with temperatures up to 300 degrees Celsius.
Russian United Metallurgical Company OMK has shipped a batch of 14 bellows expansion joints in December 2021 for the Rooppur nuclear power plant, which is being built by Rosatom in the Republic of Bangladesh. Eight expansion joints were delivered in a non standard design. The products were manufactured at the OMK Belgorod plant, Belenergomash BZEM. The designers of the enterprise have developed for ordering two types of balanced bellows expansion joints, which are used to level the shear displacements of pipelines. The first type of expansion joint, which was developed on the basis of the existing standard design, has a length of 1500 mm.For the second type, it was necessary to reduce the overall length of the finished product to 1000 mm. This problem was solved by abandoning heavy and oversized forgings in favor of blanks from heavy-plate metal rolling, which are used in the design of the finished product. As a result, the length of the expansion joint was reduced by a third up to 1000 mm.To confirm the required characteristics, two samples were made at the plant and tested at the stand of the Test Center for the production of bellows expansion joints of the Belgorod OMK plant. The head samples successfully withstood all loads - cyclic, axial, shear displacements. After tests at the plant, a batch of bellows expansion joints was manufactured, which were handed over to representatives of authorized organizations without any complaints.All expansion joints were covered with green organ silicate enamel. It has high radiation resistance, is resistant to decontamination solutions and is capable of withstanding hot steam with temperatures up to 300 degrees Celsius.
