(1) During extrusion, the temperature of the inner lining of the
spiral welded steel pipe continuously increases with the extrusion process. At the end of extrusion, the temperature in the area near the extrusion die on the inner wall of the lining is relatively high, reaching 631℃. The temperature of the intermediate lining and outer cylinder does not change significantly.
(2) In the non-working state, the maximum equivalent stress of the spiral welded steel pipe is 243MPa, mainly concentrated on the inner wall of the spiral welded steel pipe. In the preheated state, its maximum value is 286MPa, distributed in the middle part of the inner wall surface of the lining. In the working state, its maximum equivalent stress is 952MPa, mainly distributed in the high-temperature area at the upper end of the inner wall of the spiral welded steel pipe. The stress concentration area inside the spiral welded steel pipe is mainly distributed in the high-temperature area, and its distribution is basically the same as the temperature distribution. The thermal stress generated by the temperature difference has a significant impact on the stress distribution inside the spiral welded steel pipe.
(3) The radial stress on the spiral steel pipe: In the non-working state, the spiral steel pipe is mainly subjected to the prestress provided by the external prestress, and the radial stress of the spiral steel pipe is in a compressive stress state, with the largest value being 113 MPa, distributed on the outer wall of the spiral steel pipe. In the preheated state, its largest radial pressure is 124 MPa, mainly concentrated at the upper and lower end faces. In the working state, its largest radial pressure is 337 MPa, mainly concentrated in the upper part of the spiral steel pipe.
Threeway Steel is known as a professional supplier engaged in manufacturing and distributing a wide range of steel pipe, and our headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
Threeway Steel is known as a professional supplier engaged in designing, manufacturing and distribution of a wide range of steel products with the headquarter located the central part of China – Hunan and six associated factories throughout China.
