Zhejiang Company’s 100 mm-thick cross-shaped column has been successfully shipped from the factory.

Release Date:

2015-12-21 19:58

On December 19, 2015, the first batch of components for a key Beijing project, manufactured under contract by Zhejiang Company, successfully left the factory. This batch presented significant fabrication challenges: the components were cross-shaped columns with both flange and web thicknesses of 100 mm (dimensions: 1000 × 1000 × 100 × 100 mm), each weighing as much as 33.6 tonnes.

The project has a tight schedule and involves components with challenging welds; preheating is required before welding, interpass temperature must be carefully controlled during the process, and post‑weld heat treatment is essential. Inadequate control throughout these steps can lead to defects such as cold cracks. As Zhejiang Company was undertaking the fabrication of this type of product for the first time, all employees placed great emphasis on the task, working overtime to meet the deadline and rigorously managing welding parameters. The company successfully completed the initial shipment plan, achieving a first‑pass weld‑quality rate of 99.6%. Prior to delivery, the client conducted dimensional inspections and nondestructive testing of the welds at the factory, offering high praise and approving the products for release. The successful fabrication of the first batch of components marks a significant milestone for Zhejiang Company in the heavy‑steel sector, laying a solid foundation for future heavy‑steel projects.