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  • GTQ vent pipe

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GTQ vent pipe

GTQ vent pipe

  • Model:GTQ-6P/GTQ-16P/GTQ-6C/GTQ-16C
  • Specification:DN50-DN250
  • Temperature:-35℃~+480℃
  • Medium:oil and gas storage tanks, pipelines.
  • Pressure:0.6~6.4MPa
  • Connection method:flange connection
  • Driving method:automatic
  • Material:cast steel, stainless steel
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GTQ vent pipeOverview

 The GTQ type vent pipe is an air exchange device installed on the top of atmospheric or low-pressure storage tanks, allowing free flow between the tank vapor space and the atmosphere. When the tank is filled or emptied, or when pressure fluctuations occur due to ambient temperature changes, the vent pipe automatically balances the pressure difference between the tank interior and the atmosphere, preventing tank deformation or rupture due to overpressure or vacuum. This vent pipe is typically equipped with a rain cover, insect screen, or flame arrestor. Its core purpose is to provide safe and efficient venting for atmospheric storage tanks such as water tanks, oil tanks, chemical tanks, and food tanks, ensuring that the tank remains at atmospheric pressure during normal operation and environmental changes, thereby protecting tank structural integrity and media quality.

Product Drawing of GTQ vent pipe

GTQ vent pipeCharacteristic

1. Free venting with automatic pressure balance: Straight or elbow structure provides gas inlet/outlet passage, automatically balancing tank pressure without moving parts, ensuring high reliability.

2. Rain and dust protection design: Top rain cover prevents rain, dust, and debris from entering the tank; optional insect screen prevents insects and birds from entering.

3. Optional flame arrestor function: Can be equipped with stainless steel corrugated flame arrestor element to prevent external flames from entering the tank through the vent pipe, meeting fire protection codes.

4. Large venting capacity with low pressure drop: Large flow cross-sectional area minimizes gas flow resistance, meeting venting requirements during rapid filling and discharging.

5. Multiple corrosion-resistant materials: Body available in carbon steel, stainless steel, aluminum alloy, or plastic (UPVC/PP) to suit various media such as water, oil, chemicals, and outdoor environments.

6. Simple structure with easy installation and maintenance: Standard flange or threaded connections for easy installation; removable rain cover and insect screen for convenient cleaning, low maintenance cost.

7. Wide application range: Suitable for vent piping of atmospheric storage tanks in water treatment, petrochemical, food and beverage, environmental protection, and other industries.

GTQ vent pipestructure principle

Structure Diagram of GTQ vent pipe

Component name and material

阀体材料 (Valve Body Material)碳钢WCB、不锈钢304、316、
阻火芯件材料 (Fire Retardant Core Material)不锈钢防爆阻火波纹板
密封件材料 (Sealing Component Material)耐油石棉橡胶、四氟PTFE
环境温度℃ (Ambient Temperature ℃)≤480


GTQ vent pipetechnology parameter

Performance Specification Table

项目Item技术参数Specification
产品型号ModelGTQ type tank top flame arrester breather GTQ罐顶阻火透气管
公称通径Nominal DNDN50、DN80、DN100、DN150、DN200、DN250、DN300、DN350、DN400、DN500
公称压力Nominal PressurePN0.6MPa、PN1.0MPa、PN1.6MPa
设计压力Design Pressure常压通气,开启压力±300Pa;耐压试验0.2MPa水压无渗漏
适用介质Working Medium原油、汽油、柴油、煤油、各类轻质/重质油品、化工易挥发介质
工作温度Working Temp-35℃~+480℃
连接方式Connection法兰连接(HG/GB标准法兰),可选对焊连接
执行标准StandardSY/T0525.4、GB50160石化防火规范
产品用途Function储罐伴压通气、阻火防爆、平衡罐内压力、减少油品挥发损耗,适配固定顶罐/内浮顶罐罐顶安装,可单独使用或配套呼吸阀
阻火性能Fire Resistance阻火芯耐烧阻爆,符合石油储罐阻火安全规范


GTQ vent pipestandard size

GTQ vent pipe of Outline Drawing

Outline dimension table

GB、JB国标法兰连接外形尺寸:


规格model尺 寸size
HLDD1D2nd
DN100273280ф205ф170ф145418
DN150367390ф260ф225ф200818
DN200472510ф315ф280ф255818
DN250572628ф370ф335ф3101218
DN300635660ф395ф435ф4051218