Quick opening blank flanges are mechanical devices used on circular openings of pressure pipes or pressure vessels. They typically consist of components such as cylinder flanges, head covers, hooks or clamps, sealing rings, safety interlock mechanisms, opening and closing mechanisms, swivel arms, and stubs (if required).

Quick-opening blank 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 blank flanges are categorized into typical structures such as tooth-type, clamp-type, snap-type, locking ring-type, expanding ring-type, and fixed pressure ring-type, mainly operated manually.

Our quick-opening blind flange is designed according to ASME Section VIII Div.1, with finite element stress analysis and structural design. All major pressure components are manufactured from integral forgings, utilizing 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 laws and 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 transmission pipelines

Ball Receiving and Emitting Cylinder (commonly referred to as Ball Receiving and Emitting Tube)

A variety of filters and filter separators

Boosted Pressure Vessel, Sulfurizing Pot