Mudanjiang Jinhuan石化Equipment Co., Ltd. is a domestic professional manufacturer of quick-opening blind flanges. It is a company under the People's Republic of China's petrochemical industry..Industry participant in the gas industry standard SY/T0556-2010 "Technical Specification for Quick-Opening Blank Flanges" and SY/T0556-2018 "Technical Specification for Quick-Opening Blank Flanges," with over 30 years of manufacturing history in quick-opening blank flanges. The company has a certain reputation and influence in the industry and is recognized as a AAA credit-rated enterprise in Heilongjiang Province. The main products include four types of quick-opening blank flanges: expanding ring type, clamp type, plug type, and fixed pressure ring type. In recent years, the products have been upgraded and replaced, with the technical performance and level of the fixed pressure ring type quick-opening blank flange reaching international standards (as seen in the technical evaluation report). The company currently holds multiple patents for quick-opening blank flanges.