Zhejiang Kangxin Steel Pipe Co., Ltd., founded in 1994, has established rigorous hydrostatic testing as a cornerstone of its quality control system for stainless steel seamless tubes . Following cold drawing, cold rolling, and heat treatment processes, each tube undergoes individual hydrostatic testing to verify its pressure integrity and leak-tightness . The company’s testing equipment applies specified pressure with adequate holding time to ensure tubes meet the demanding requirements of petrochemical, boiler, heat exchanger, and pressure vessel applications . This testing is integrated with eddy current and ultrasonic inspections, supported by a complete physical and chemical laboratory, to form a comprehensive quality assurance framework . With production capabilities covering outer diameters from 6mm to 720mm and wall thicknesses from 1mm to 50mm, Kangxin aligns its hydrostatic testing procedures with GB, ASTM, ASME, DIN, and JIS standards . This systematic approach reflects the company’s practical, quality-first manufacturing philosophy and its commitment to delivering reliable stainless steel tubes for critical industrial environments.