Zhangquan Hardware Products (Kunshan) Co., Ltd., founded in 1998, specializes in the R&D and production of hot-formed welded pipes, precision welded tubes, high-strength steel pipes, heavy machinery fittings, and shock absorber tubes. Backed by our Taiwan HQ's mature tech and strict QC, we utilize fully automated lines for ERW welding, precision forming, weld seam annealing, and non-destructive testing. We mass-produce high-precision, high-strength, fatigue-resistant tubes ideal for automotive, construction machinery, new energy, specialized equipment, and sports gear.