Shandong Mengshun Machinery Technology Co., Ltd.
Introduction to Quick-Opening Blind Flanges
Release date:
Sep 02,2025
Source:
Widely used on oil and natural gas gathering pipelines, these quick-connect end caps for pig launchers/receivers and filters are also suitable for frequent-shut-off applications in pipelines or vessels required in the petroleum, chemical, light industry, and water supply & drainage sectors.
Our company’s quick-opening blind plates boast advanced technology, exceptional safety and reliability, a straightforward design, and convenient operation—making them ideal for high-pressure applications with large-diameter requirements. They are widely favored by customers across various industries. These plates are extensively used in oil and natural gas gathering and transmission pipelines, as well as on end caps of receiving and shipping cylinders and filters that demand rapid opening and closing. Additionally, they’re suitable for pipelines or vessels in the petroleum, chemical, light industry, and water supply & drainage sectors where frequent switching is necessary.
A quick-opening blind flange is a mechanical device designed for use on circular openings in pressurized pipelines or pressure vessels, enabling rapid opening and closing. In China, these are typically categorized into two types: toggle-type and locking-ring (three-lobed) designs. For nominal diameters ranging from DN100 to DN350, the toggle-type quick-opening blind flange is generally preferred due to its convenient operation—easy to open and close with minimal effort. For larger sizes—from DN400 to DN1600—we recommend the locking-ring type, which requires less force for both opening and closing, making it even simpler to operate. Our company’s production range includes the following specifications: Nominal diameter (DN): DN150 – DN1400 Service media: oil, gas, water Operating temperature: -19°C to 80°C
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