Polyurethane Insulated Knock-Out Drums

A polyurethane insulated knock-out drum is a pressure vessel designed to separate entrained liquids from gas streams while maintaining controlled temperatures through integrated polyurethane foam insulation. These drums protect downstream equipment such as compressors, turbines, and instruments from liquid damage while preventing condensation or temperature-related separation issues.

Why are Polyurethane Insulated Knock-Out Drums Needed?

Polyurethane insulated knock-out drums are essential for gas processing applications where temperature affects liquid separation efficiency and prevents unwanted condensation. Maintaining optimal temperatures ensures effective liquid removal, protects downstream equipment, and prevents hydrate formation or other temperature-related operating problems.

Polyurethane Insulated Knock-Out Drums Applications

Common applications include:

• Compressor suction drums
• Fuel gas knock-out drums
• Flare knock-out drums
• Inlet separators
• Gas dehydration inlet drums
• Turbine fuel gas separators

Polyurethane Insulated Knock-Out Drums Specifications

At Roben, Mfg, Inc., we offer comprehensive options including:

• Horizontal and vertical configurations
• Volumes from 100 gallons to 50,000+ gallons
• Design pressures from vacuum to 1,500 psig
• Internal mist eliminators and demisters
• Automatic liquid drain systems

Certifications and Standards

Our polyurethane insulated pressure vessels are designed and manufactured in accordance with stringent industry standards:

• ASME Section VIII Division 1 & 2: Pressure vessel design and fabrication standards
• ASME Section IX: Welding procedures and qualifications
• NBIC: National Board Inspection Code compliance
• CRN: Canadian Registration Number for Canadian installations
• PED: Pressure Equipment Directive for European Union market
• U Stamp & R Stamp: ASME certification for new construction and repairs

Polyurethane Insulated Knock-Out Drums Frequently Asked Questions (FAQs)

Why insulate knock-out drums?

Insulation prevents heat loss that could cause additional condensation in the gas stream or temperature-related issues such as hydrate formation. Maintaining gas temperature above the dew point ensures efficient separation and prevents operational problems. Insulation also protects personnel from hot surfaces and reduces ambient heat load.

What mist elimination options are available for insulated knock-out drums?

We offer multiple mist elimination technologies including wire mesh pads, vane-type demisters, coalescing elements, and cyclonic separators. The optimal technology depends on your droplet size distribution, gas velocity, and separation efficiency requirements. Our engineering team will recommend the best solution for your application.

Can knock-out drums be designed for sour gas service?

Yes, Roben Mfg, Inc. fabricates polyurethane insulated knock-out drums for sour gas service with appropriate material selection, design considerations, and NACE compliance. The vessel design accounts for hydrogen sulfide exposure, and materials are selected to prevent sulfide stress cracking and other corrosion mechanisms.

Contact Roben, Mfg, Inc.

For more information about our polyurethane insulated pressure vessel solutions or to request a quote, please contact Roben, Mfg, Inc. today. Our experienced engineering team is ready to assist you in developing the perfect solution for your unique application requirements.

Phone: (732) 364-6000 | Email: sales@robenmfg.com

760 Vassar Ave, Lakewood, NJ 08701