In chemical tail gas recovery, oil and gas gathering and transportation, and industrial gas purification systems, the entrainment of free gas and mechanical impurities in gas-liquid two-phase flow is a common cause of decreased efficiency in downstream equipment and increased pipeline vibration. Conventional filters struggle to simultaneously handle pressure fluctuations and continuous degassing requirements. To address this issue, Tianmiao Chemical Machinery Co., Ltd. has independently developed a low-alloy high-strength degassing filter, which has completed factory inspection and been put into engineering application. This equipment has specifications of DN900*12*1500, uses Q345R pressure vessel special plate as the main material, and has a net weight of 2715kg. It integrates high-efficiency degassing and precision filtration, providing a highly reliable equipment solution for media purification.
Low-alloy high-strength degassing filter specifications, design, and material selection
The design of the low-alloy high-strength degassing filter strictly follows GB/T 150 and NB/T 47041 pressure vessel standards. The equipment body has a diameter of 900mm, a cylinder wall thickness of 12mm, a straight section length of 1500mm, and an overall net weight of 2715kg. This specification is primarily designed for large-diameter process pipeline applications, capable of handling large flow rates of gaseous media while maintaining stable filtration accuracy and exhaust efficiency.
Analysis of the Load-Bearing Capacity of the DN900*12*1500 SpecificationThis filter uses 12mm Q345R steel plate.Q345R yields 30% higher strength than Q235B and 20R.This applies when wall thickness stays the same.The DN900 cylinder works safely at 1.6MPa.It keeps a large safety margin in operation.The 1500mm straight section offers enough space.It houses internal degassing parts and filter elements.Sufficient residence time ensures stable degassing.
Comprehensive Performance Advantages of Q345R Main Material
The equipment uses Q345R low-alloy high-strength steel.It meets the GB/T 713 pressure vessel standard.Q345R has higher strength and toughness than ordinary steel.It also keeps excellent weldability.We perform post-weld heat treatment before delivery.This process removes residual stress effectively.It greatly improves fatigue resistance under cyclic loads.
Core Technological Breakthrough of the Low-Alloy High-Strength Degassing Filter
Conventional filters can only intercept solid impurities and are ineffective against gas entrainment. Tianmiao’s R&D team has implemented a systematic structural innovation for the low-alloy high-strength degassing filter, starting from the flow channel organization and gas-liquid separation principle.
Integrated Degassing and Filtration Flow Channel Design
The equipment combines multi-stage baffles and wire mesh demister.Medium enters the cylinder and first expands and slows down.Free bubbles rise to the gas chamber under buoyancy.The top exhaust valve discharges gas automatically.Degassed medium then passes through fine filtration.Filter traps solid particles on its surface.This unit completes degassing and filtration in one body.You no longer need two separate units in series.It greatly saves installation space and investment cost.
Dual Functions of Airflow Equalization and Impurity Interception
Field operation data shows that this low-alloy high-strength degassing filter achieves an interception efficiency of no less than 98% for solid particles larger than 5μm in diameter, and reduces the volume fraction of entrained gas by over 85%. The exhaust valve automatically opens and closes based on the collected gas volume, avoiding the risk of missed venting during manual periodic venting.
High-Rigidity Shell for Impact Conditions
The equipment’s net weight of 2715kg reflects the comprehensive configuration of its shell and reinforcing structure. In piping systems with pressure fluctuations or water hammer risks, this low-alloy high-strength degassing filter, thanks to the high yield strength of Q345R material and the rigidity of the shell, effectively suppresses equipment vibration and prevents weld fatigue cracking.
Typical Application Scenarios of the Low-Alloy High-Strength Degassing Filter
We now run this filter in chemical, oilfield, and LNG stations.Users report much less liquid carryover to downstream compressors.The filter also extends precision element life by 1.5 times.
Suitable for Chemical Waste Gas and Oil & Gas Gathering and Transportation Environments
Chemical waste gas carries condensate and catalyst dust.Oil and gas media contain free water and sediment.We customize filter materials and precision for different media.Our filter supports 316L screens, sintered felt and fiberglass.It delivers stable performance and long service life.
Reduces Overall Lifecycle Maintenance Costs
Ordinary carbon steel filters need frequent replacements and venting. In contrast, our degassing filter features an integrated design. It greatly reduces the frequency of manual inspections. An automatic vent valve works with a differential pressure gauge. It alerts you when the filter element needs replacement. Then you can maintain equipment as per your production plan. As a result, it cuts unplanned downtime by over 60%.
Tianmiao Chemical Machinery focuses on special pressure vessels.In particular, we make high-strength degassing filters.Simply, connect it inline at the media inlet.It keeps your original pipeline layout unchanged.Moreover, it solves gas entrainment and impurity issues.If you face gas interference or short filter life,Just contact our team for customized solutions.