Quick-opening blind plates are widely used as pressure components in pressure vessels, pressure pipelines, and related equipment, enabling rapid opening for maintenance, internal component replacement, and repairs. In the natural gas industry, they are commonly applied to devices requiring intermittent operation, such as gas filters, gas filter separators, and pig launcher/receiver units. They can replace pressure vessel manholes, quick-opening doors for pigging systems, filter(separator) units, and vulcanizing tanks.

TSG21-2016 "Code for Safety Engineering Supervision of Stationary Pressure Containers", GB 150.1-150.4-2011 "Pressure Vessel", JB4732-1995 "Steel Pressure Vessels-Design by Analysis", Manufacturer's Standard, good sealing performance, flexible operation, integral structure, safe and reliable, compact structure, small size, easy installation, equipped with safety interlocking device. Applicable Medium: Low-sulfur natural gas, manufactured gas, liquefied petroleum gas (LPG) and other non-corrosive gases. Design Temperature: -40℃ to 80℃. Pressure Rating: Class150, Class300, Class600, Class900. Nominal Diameter: DN300 to DN1200. Main Materials: Neck Flange: A105 / A350 / 16Mn III; Cover: A105 / A350 / 16Mn III. Sealing Ring: Fluororubber (FKM) / Nitrile Rubber (NBR). Pig Launcher/Receiver, design and manufacturing comply with GB/T 150 "Pressure Vessel" and TSG 21 "Code for Safety Engineering Supervision of Stationary Pressure Containers". The pigging system mainly consists of pig (pipeline cleaning tool with interference fit to inner wall), launcher (installed at pipeline start point), receiver (installed at pipeline end point), and electronic tracking system (including transmitter, receiver, and pig indicator). The pig is propelled by air pressure to push accumulated scale and debris out of the pipeline. The electronic tracking system monitors pig movement and provides precise location if stuck. The launcher/receiver typically features quick-opening blind plate (for rapid operation), pig indicator (for process monitoring), and compact design (suitable for routine maintenance). Applicable for natural gas, crude oil, and refined petroleum products.

The U-tube heat exchanger is designed and manufactured in compliance with the requirements of GB/T 151 Heat Exchangers, GB/T 150 Pressure Vessels, and TSG 21 Safety Technical Supervision Regulation for Stationary Pressure Vessels. The U-tube heat exchanger features a single tube sheet with fewer sealing surfaces, ensuring reliable operation. Both ends of the tubes are fixed to the same tube sheet, allowing free expansion and eliminating thermal stress caused by temperature differences between the tube and shell. It offers excellent thermal compensation performance. With a double-tube pass design, it provides a longer flow path, higher velocity, and superior heat transfer efficiency. Suitable for high-temperature and high-pressure applications, it exhibits strong pressure-bearing capacity. The tube bundle can be extracted from the shell for easy maintenance and cleaning, and its simple structure makes it cost-effective.

The cyclone separator is designed and manufactured in compliance with the requirements of GB/T 150 Pressure Vessels and TSG 21 Safety Technical Supervision Regulation for Stationary Pressure Vessels. Natural gas enters the cyclone separation zone through the equipment inlet. When the gas containing impurities enters the cyclone component axially, the airflow is strongly rotated by the guiding effect of the guide vanes, spiraling downward along the cylinder into the cyclone body. Large-density liquid droplets and dust particles are thrown toward the cylinder wall by centrifugal force and, under gravity, flow downward along the cylinder wall to the dust outlet of the cyclone tube, reaching the liquid storage area at the bottom of the equipment, and finally exiting through the bottom outlet. The rotating airflow contracts toward the center of the cylinder, forming a secondary vortex that flows upward through the guide tube into the purified natural gas chamber, then exits through the top outlet of the equipment.

The filter separator is designed and manufactured in compliance with the requirements of GB/T 150 Pressure Vessels and TSG 21 Safety Technical Supervision Regulation for Stationary Pressure Vessels. The GLF-type filter separator consists of a cylinder, head, quick-opening blind flange, filter element bundle, separation element, liquid collection chamber, level gauge, and saddle support. The filter separator typically adopts a quick-opening blind flange structure, enabling simple and fast operation. It can be configured in either vertical or horizontal designs. Multiple filter elements made of stainless steel mesh or polyester fiber form a filter bundle to simultaneously process the medium, allowing for higher flow rates and lower pressure loss. A stainless steel vane-type mist eliminator at the end removes liquid droplets from the medium. Impurities filtered out by the filter elements are collected in the liquid collection chamber at the bottom of the filter separator, and the need for drainage can be determined by observing the externally mounted level gauge. Customers can assess filter element blockage by monitoring the differential pressure gauge reading. The filter separator operates based on the screening effect, deep filtration effect, and electrostatic effect of dry-type separators, along with the mist eliminator's water removal principle, to eliminate solid impurities and moisture from gases. The specially treated filter elements also provide some separation capability for small amounts of liquid impurities.

The filter is designed and manufactured to comply with GB/T36051 Gas Filters, GB/T150 Pressure Vessels, and TSG21 Safety Technical Supervision Regulation for Stationary Pressure Vessels. It consists of a pressure vessel body, filter element, flange head or quick-opening blind plate head, differential pressure gauge, and drain valve. The filter features easy installation and maintenance, with stainless steel mesh or non-woven fabric filter elements that provide large filtration area and low pressure drop. Filtered particles are concentrated at the bottom for discharge. The stainless steel mesh filter element is reusable after cleaning, and the filter's clogging status can be determined by the differential pressure gauge reading.