ASME Gas Separator & Scrubber Vessel for Process Gas

Yuhong Group Co., Ltd. designs and manufactures a comprehensive range of pressure equipment for global industries. Our core offerings include shell and tube heat exchangers, pressure vessels, air coolers, and process separators – including gas separators, scrubbers, knock-out drums, and two-phase/three-phase separators for oil, gas, and chemical processing. We also supply critical components: finned tube bundles, U-tube bundles, heat exchanger tubesheets, and all related parts – ensuring full support for new projects and maintenance.

Shown in the attached photographs are examples of our gas separators – including a hydrogen/oxygen separator and a natural gas separator – demonstrating our capability to fabricate ASME-coded separation vessels for gas processing, hydrogen production, and refining applications.

A gas separator (also called a scrubber, knock-out drum, or mist eliminator) is a pressure vessel designed to remove entrained liquid droplets, solids, or mist from a gas stream. These vessels are critical in gas processing, hydrogen production, natural gas treatment, and compressor stations to protect downstream equipment from liquid carryover and erosion.

Based on the images, these separators exhibit:

• Configuration: Vertical or horizontal design – optimized for gas/liquid separation
• Material: Carbon steel (ASME SA516 Gr.70) – with optional corrosion-resistant lining or stainless steel
• Construction: ASME Section VIII, Division 1 compliant with U-Stamp certification
• Internal components: Inlet diverter, baffles, demister, level control nozzles
• Applications: Hydrogen/oxygen separation, natural gas dehydration, compressor suction scrubbers

• ASME U-Stamp certified: Full compliance with ASME Section VIII, Division 1 – ensuring global acceptance for safety and regulatory requirements.
• Optimized internal design: Inlet diverter, baffles, and demister are designed to maximize gas/liquid separation efficiency – ensuring clean gas outlet and minimal liquid carryover.
• Custom engineering: Designed to your specific gas flow rates, pressure, temperature, and liquid loading conditions.
• Material flexibility: Carbon steel (SA516 Gr.70), stainless steel (304/316L), clad plate, or nickel alloys – selected based on service gas corrosivity.
• NDE & PWHT: Full NDE (RT, UT, MT, PT) and PWHT as required by ASME code – ensuring weld integrity.
• Hydrostatic testing: Every separator is pressure-tested before shipment – documented with test reports.

1. Inlet Flow: Gas enters through the inlet nozzle, carrying entrained liquid droplets.
2. Inlet Diverter: Gas strikes the inlet diverter/impingement plate – velocity drops, and larger liquid droplets fall to the liquid section.
3. Gravity Separation: As gas flows through the vessel, smaller droplets settle by gravity into the liquid section.
4. Demister / Mist Eliminator: Gas passes through the demister where remaining fine droplets coalesce and fall back to the liquid section.
5. Clean Gas Outlet: Dry gas exits through the top/outlet nozzle – free of liquid carryover.
6. Liquid Drain: Separated liquid accumulates at the bottom and is drained through the liquid outlet with level control.

The demister (or mist eliminator) is one of the most critical components in a gas separator:

• Function: Removes fine liquid droplets (as small as 3-10 microns) from gas streams
• Construction: Typically made of knitted wire mesh (stainless steel, Monel, or other alloys)
• How it works: Gas passes through the mesh; droplets impinge on the wire surface, coalesce, and fall back into the liquid section
• Types: Wire mesh demisters, vane-type mist eliminators, fiber-bed coalescers
• Application: Protects downstream compressors, turbines, and heat exchangers from liquid damage

• ASME U-Stamp certification: Full code compliance – accepted worldwide for regulatory and insurance purposes.
• Complete design & fabrication: From process design to final delivery – all in-house, including internal components.
• Material verification: PMI (Positive Material Identification) on all pressure-retaining components.
• NDE & documentation: Complete NDE reports, hydrostatic test reports, and ASME data reports included.
• Component integration: Vessels supplied with all internals – inlet diverter, baffles, demister – and external accessories.

If your existing gas separator needs replacement parts, we supply individual components without ordering a complete new vessel:

• Inlet diverters / impingement plates – to your dimensions
• Demister / mist eliminator pads – stainless steel, Monel, or alloy
• Baffle plates – carbon steel or stainless steel
• Level control nozzles and instruments – complete assemblies
• Dished heads – formed to your dimensions and thickness
• Nozzles and flanges – SA105, SA182 – any facing type
• Manway covers and gaskets – complete access closure assemblies
• Heat exchanger tubes – for internal heating coils
• Finned tube bundles – for external gas heating/cooling applications
• U-tube bundles – for internal heat exchange

Every gas separator we fabricate includes:

• ASME U-Stamp certification – with Manufacturer’s Data Report
• Material Test Certificates (MTC) per EN 10204 3.1
• NDE reports – RT, UT, MT, PT as required
• PWHT records – time-temperature charts
• Hydrostatic test report – documented and witnessed
• Internal component inspection report – demister, baffles, inlet diverter
• PMI (Positive Material Identification) – 100% verification
• Third-party inspection (SGS, BV, TÜV) – at buyer's request

To quote a gas separator like the ones in your photographs, send the following to jimmy@steelseamlesspipe.com:

• Gas type (hydrogen, natural gas, process gas)
• Flow rate (gas & liquid)
• Inlet conditions (pressure, temperature)
• Liquid loading (amount of liquid to be removed)
• Required outlet gas quality (liquid carryover specification)
• Required material (carbon steel, stainless steel, alloy)
• Any drawing or sketch available

We will respond with a technical proposal, general arrangement drawing, and competitive price – typically within 72 hours.