Recently, the XM-19 seamless steel pipe independently developed by Zhongda New Materials has successfully passed the testing links of China Special Equipment Testing and Research Institute, and obtained the special equipment type test certificate issued by it. The acquisition of this certificate indicates that Zhongda New Material's new products have met the requirements of the safety performance of pressure piping components of special equipment, and has the ability to produce pressure piping components of special equipment, laying a solid foundation for Zhongda New Materials in the field of seamless steel pipes.

The type test is an activity of reviewing the technical data, safety performance inspection and testing of XM-19 seamless steel pipe products manufactured by the new materials on whether the XM-19 seamless steel pipe products manufactured by the new materials meet the safety technical specifications on the basis of the qualified quality inspection and test of Zhongda New Materials, and verifying the safety and reliability of the ex-factory products. The certificate obtained through the type test is not only a new product certification of new material innovation, but also indicates that the company has the ability to produce such steel specifications.

In order to successfully pass the certification of the "Special Equipment Type Test Certificate" for pressure piping components, Zhongda New Materials has organized quality assurance centers, marketing centers, technology centers, manufacturing centers, etc. to hold quality special meetings for many times to make full preparations for the successful passage of the type test and ensure the smooth acquisition of the certificate.

In the existing hydrogen refueling station, low-strength stainless steel such as SUS316 and SUS316L with good hydrogen embrittlement performance are generally used in compressors, pressure accumulators, pipes and joints of high-pressure hydrogen refueling parts, but in order to improve the hydrogenation efficiency, the thick-walled equipment is inevitable, and high-strength materials need to be used in order to control the thickness of the equipment. HRX-19 stainless steel is a high-grade stainless steel material for hydrogen refueling stations developed by Nippon Steel & Sumitomo Metal, corresponding to SA 213M XM-19 in ASME standard, and its hydrogen embrittlement resistance is not less than 316L, but the strength is 1.5 times that of 316L, which can achieve 40% downgauging and reduce the construction cost of hydrogen refueling stations; At the same time, HRX-19 also has good weldability, the traditional 316L stainless steel pipe needs to be connected with a threaded joint and a valve, a hydrogen station needs hundreds of joints, and the XM-19 welded joint has the same level of strength and hydrogen embrittlement resistance as the base metal, which can reduce the use of threaded joints and valves, and reduce construction and maintenance costs. At present, China's Sinopec future 70MPa hydrogen refueling station has determined to use HRX-19 stainless steel to manufacture high-pressure hydrogen components, and the market prospect is very broad.

Zhongda New Materials meets the relevant standards of products in all aspects of quality control and calibration of stainless steel cold-rolled (drawn) seamless steel pipe products, production process control, etc., which ensures the stable and reliable product quality while ensuring the actual needs of users, reducing costs for users and improving sustainable income. The successful acquisition of the special equipment type test certificate is another important milestone on the road of quality-oriented and standardized development of Zhongda New Materials.