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

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

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

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

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

Application Scenario

Oil and natural gas transmission pipelines

Cleaning ball receiver and sender tubes (also known as: ball receiver and sender)

A variety of filters and filter separators

Boosted Kettle, Sulfurizing Pot