The vent tee is installed on pressure pipelines. Through a reserved dedicated vent branch interface, it is used together with vent valves, drain valves, purge connectors, or pressure gauges, helping the pipeline discharge accumulated air, release residual pressure, and drain accumulated liquid and residual liquid during startup, shutdown, and maintenance. We use one-piece forging or seamless pressing processes for forming, with smooth flow channels, reducing blind areas where gas and liquid accumulate, uniform pressure bearing, and stable sealing performance. The product structures include straight T-type, 45° inclined, and Y-type vent structures. Connection methods cover butt welding, flange, threaded, and socket welding, and can adapt to permanent main pipeline networks and detachable maintenance pipelines. In terms of materials, carbon steel models can be selected for normal-temperature and low-pressure water and gas pipeline networks, stainless steel models for corrosive media, and alloy steel thickened models for high-temperature and high-pressure steam and oil-gas working conditions. Specifications cover DN15–DN600, and support customization of non-standard pipe diameters, special branch angles, and irregular eccentric structures according to drawings, samples, or technical agreements.
Overview
The vent tee is a safety pressure-relief branch pipe fitting specially used in pressure piping systems. It is installed on pipelines and connects to vent valves, drain valves, purge connectors, or pressure gauges through the reserved vent branch interface. Its main function is to discharge accumulated air and mixed gases inside the pipeline during pipeline startup, shutdown, and maintenance, release residual pressure, drain accumulated liquid and residual liquid, and avoid air lock, air blockage, pipeline vibration, and unstable transportation. During daily operation, it can assist in exhausting air and stabilizing pressure, reducing cavitation and negative pressure fluctuations. The vent tees we produce are formed by integrated forging or seamless pressing processes, with smooth flow channels, uniform pressure bearing, and stable sealing performance, suitable for industrial pipeline networks such as petrochemical, gas and heating, power and energy, and municipal pressure pipelines.
Key Features
The vent tee is designed around three aspects: exhaust and pressure relief, drainage and purging, and convenient maintenance. The integrated forming process makes the flow channel smooth, reduces blind areas for accumulated gas and liquid, provides fast pressure relief and exhaust speed, and thorough drainage. The branch angle and diameter can be matched as needed to vent valves, drain valves, and purge connectors, adapting to various safety supporting equipment. The product covers the full diameter range from DN15 to DN600 and provides three material systems: carbon steel, stainless steel, and alloy steel. For normal-temperature and low-pressure water and gas pipeline networks, the carbon steel version can be selected; for corrosive gases and liquids, the stainless steel version can be selected; for high-temperature and high-pressure steam, oil, and gas, the alloy steel thickened version can be selected. Connection methods include butt welding, flange, thread, and socket, offering flexible installation positions and adapting to permanent main pipeline networks and detachable maintenance pipelines.
Applications
The vent tee is suitable for industrial pipeline networks that require exhaust and pressure stabilization, drainage and liquid discharge, pipeline purging, and maintenance pressure relief. In petrochemical scenarios, it is used for pressure relief and explosion prevention and emptying residual materials in oil and gas transportation and chemical process gas pipelines. In gas and heating scenarios, it is used for exhaust and pressure stabilization in natural gas, steam, and heating pipeline networks, eliminating pipeline pressure buildup and vibration. In power and energy scenarios, it is used for exhaust and cavitation prevention in power plant water and steam, circulating water, and compressed air pipeline networks, protecting pumps and valve equipment. In municipal pipeline network scenarios, it is used to empty air inside water supply and municipal pressure pipelines, reducing abnormal noise during water flow and unstable water flow. In equipment supporting scenarios, it is used for auxiliary pressure relief and drainage in inlet and outlet pipelines of storage tanks, pressure vessels, and heat exchangers. In industrial purging scenarios, it connects to purge interfaces to complete the cleaning of pipeline impurities, accumulated water, and oil stains.
Specifications
The specifications of the vent tee cover DN15–DN600, adapting to pipeline network working conditions across low-pressure, medium-pressure, and high-pressure full pressure ratings. Materials are divided into three major systems: carbon steel, stainless steel, and alloy steel. Structures include straight T-type, inclined 45°, and Y-type vent structures. Connection methods include butt welding, flange, thread, and socket. The products are manufactured in accordance with domestic and international pipeline standards such as GB/T12459, GB12237, ANSI B16.34, and API598. For specific diameter, wall thickness, branch angle, pressure rating, and material requirements, please contact us to confirm. We will assist with selection according to your pipeline network medium, pressure, temperature, and usage scenario.
Purchase & Delivery
The vent tee is a standard component for pipeline safety supporting. We have set relaxed tiered minimum order rules, adapting to pipeline network point additions, safety technical upgrades, engineering supporting, and foreign trade project distribution. For DN15–DN100 conventional carbon steel and stainless steel standard stock specifications, the minimum order quantity is relatively low. For specific MOQ, please contact us to confirm. We keep standard stock inventory of small and medium-diameter carbon steel and stainless steel vent tees. For DN15–DN100 conventional low-pressure and medium-pressure standard stock styles, after order confirmation, pressure re-inspection, anti-rust protection, and reinforced packaging can be completed within 24–48 hours. Packaging adopts a plan against impact, deformation, thread scratching, moisture, and rust. Welding bevels, flange sealing surfaces, and threaded ports are covered with protective film and equipped with anti-collision protective rings. Small and medium specifications are individually wrapped in shock-absorbing pearl cotton and then packed into moisture-proof thickened cartons. Medium and large diameters are externally wrapped with waterproof stretch film and rainproof woven fabric. Extra-large diameters are equipped with solid wood load-bearing bases. Full-container foreign trade shipments are uniformly stacked on fumigation-free solid wood pallets and reinforced with high-strength steel straps. Customized English shipping marks, specification batches, and customer LOGOs are supported.
Service & Support
We provide full-process after-sales service for energy and chemical and foreign trade customers purchasing vent tees. Products undergo appearance fine inspection, dimension re-measurement, hydrostatic pressure test, non-destructive testing, and port precision verification before leaving the factory. The pre-sales technical team can assist in matching vent tee models and branch solutions according to pipeline network medium, pressure, temperature, and usage scenario. After-sales service provides answers on installation of pipeline vent points, operation and maintenance specifications, and safety commissioning, full-process logistics tracking, and assistance for overseas customers with customs clearance. The product warranty period is 18 months, with 7×24-hour response. If you need to confirm specific configurations or request a quotation, please contact us.
FAQ
What is the main function of the vent tee?
The vent tee is mainly used for pipeline exhaust and pressure relief, drainage and liquid discharge, pipeline purging, and maintenance pressure relief. During equipment startup, it discharges accumulated air and mixed gases inside the pipeline, avoiding air lock, air blockage, and pipeline vibration; during shutdown and maintenance, it releases residual pressure in the pipeline and empties accumulated liquid and residual liquid, ensuring the safety of disassembly and assembly construction; during daily operation, it assists in exhaust and pressure stabilization, reducing cavitation and negative pressure fluctuations.
How to select models for different working conditions?
For normal-temperature low-pressure water and gas pipeline networks, carbon steel models can be selected; for corrosive gases and liquids, stainless steel models can be selected; for high-temperature and high-pressure steam, oil, and gas, alloy steel thickened models can be selected. The specific diameter, wall thickness, branch angle, and pressure rating need to be confirmed based on the pipeline network medium, pressure, temperature, and usage scenario. Please contact us for assistance with model selection.
Can vent branches be matched with valves?
The branch diameters across the entire series are standardized and can directly connect to national standard and American standard vent valves, drain valves, and purge connectors. If you have special interface requirements, we can customize according to drawings or samples.
Will high-pressure working conditions cause leakage or deformation?
The vent tee adopts an integrated forging and thickening process, with a stable structure and precise sealing. The products undergo hydrostatic pressure testing and non-destructive testing before leaving the factory. For the specific pressure resistance rating, please contact us to confirm according to the working conditions.
How are the minimum order quantity and delivery time confirmed?
For DN15–DN100 conventional carbon steel and stainless steel standard in-stock specifications, the minimum order quantity is relatively low. After order confirmation, pressure re-inspection, anti-rust protection, and reinforced packaging can be completed within 24–48 hours. For the specific MOQ and delivery time, please contact us to confirm.
