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 include typical structures such as spline-type, clamp-type, plug-type, locking ring-type, expanding ring-type, and fixed pressure ring-type, mainly operated manually.

Our quick-opening blind flanges are designed according to ASME Section VIII Division 1, with finite element stress analysis and structure conducted by ANSYS. 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 withstanding 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

Cleaner receiver and sender tubes (also known as: ball receiver and sender tube)

A variety of filters, filter separators

Boosted Kettle, Sulphurizing Vessel