Three National Standards of 《hydraulic fluid power—quick-action couplings》drafted by Zhejiang Songqiao Company have recently been published on the “National Standard Information Public Service Platform” and will be implemented on May 1,2022.

GB/T 40565.2-2021：Connections for hydraulic fluid power—Quick-action couplings—Part 2: Flush- face type at 20MPa to 31.5MPa

GB/T 40565.3-2021：Connections for hydraulic fluid power—Quick-action couplings—Part 3: Screw connection type for general type

GB/T 40565.4-2021：Connections for hydraulic fluid power—Quick-action couplings—Part 4: Screw connection type for 72MPa

Zhejiang Songqiao Hydraulic and Pneumatic Co., Ltd. has been established for more than 30 years, always adhere to product innovation and technical standardization as the primary productive force for enterprise development, has always attached great importance to the establishment and implementation of standards and actively participated in the formulation of national and industrial standards. The release of three national standards of 《hydraulic fluid power-Quick-action couplings》has played a positive role in improving the technical standardization and standardization of products in the hydraulic quick coupling industry and the integration of my country’s hydraulic quick coupling industry with the international industry.