Quick-opening blind flanges are mechanical devices used on circular openings of pressure pipes or pressure vessels. They typically consist of components such as the cylinder flange, head cover, hook or clamp, seal ring, safety interlock mechanism, opening and closing mechanism, swing arm, and stub section (if required).

Quick-opening blind flanges are a type of quick-opening cover for pressure vessels, widely used on equipment in the natural gas field that requires frequent opening and closing. Common quick-opening blind flanges are available in typical structures such as tooth-type, clamp-type, snap-type, locking ring-type, expanding ring-type, and fixed pressure ring-type, primarily operated manually.

Our quick-opening blind flange is designed according to ASME VIII Div.1, with finite element stress analysis and structural design. All main pressure components are manufactured from integral forgings using low-alloy high-strength carbon steel.

Corrosion-resistant surfacing process, suitable for various operating conditions, and capable of undergoing hydrogen and sulfur resistance tests.

Our quick-opening blind flange fully complies with regulations such as GB150 and adheres to the industry standard SY/T0556-2018 (Technical Specification for Quick-Opening Blind Flanges).

Application Scenario

Oil and natural gas gathering pipelines

Cleaning ball receiver and sender tubes (commonly known as ball receiver and sender tube)

A variety of filters and filter separators

Boosted Kettle, Vulcanizing Vat