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 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 include typical structures such as toothed, clamp band, lugged, locking ring, expanding ring, and fixed pressure ring types, primarily operated manually.

Our quick-opening blind flange is designed according to ASME VIII Div.1, and has been analyzed for finite element stress and structure by ANSYS. All major 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 plate fully complies with regulations such as GB150 and adheres to the industry standard SY/T0556-2018 (Technical Specification for Quick-Opening Blind Plates).

Application Scenario

Oil and natural gas transmission pipelines

Cleaning Ball Receiving and Discharging Cylinder (commonly referred to as: Receiving and Discharging Ball Cylinder)

A variety of filters and filter separators

Boosted釜, Sulfurization Tank