Vapor Outlet Nozzle: Nominal Size DN50 to DN300

Component Specifications

Definition

The vapor outlet nozzle is a flanged or welded connection point on a reflux drum designed to handle the controlled discharge of vapor-phase materials. It serves as the interface between the drum's vapor space and downstream equipment like condensers or vapor lines, ensuring proper flow distribution, pressure management, and phase separation. Typically positioned at the top of the drum, it prevents liquid carryover and maintains process efficiency in distillation, absorption, or stripping operations.

Working Principle

The nozzle operates by providing a dedicated flow path for vapor exiting the reflux drum. As vapor accumulates in the drum's upper section due to density differences, it flows through the nozzle, which is sized to maintain optimal velocity—preventing re-entrainment of liquid droplets while minimizing pressure drop. Its design often includes features like vortex breakers or anti-swirl devices to ensure smooth, stratified vapor flow without disrupting the liquid level below.

Materials

Common materials include carbon steel (ASTM A105, A216 WCB), stainless steel (ASTM A182 F304/316), duplex steels, or nickel alloys for corrosive services. Selection depends on process temperature, pressure, and fluid compatibility (e.g., H2S resistance).

Technical Parameters

Parameter	Typical range	Notes & selection driver
Orientation	Top-mounted, tangential
Nominal Size	DN50 to DN300
Nozzle Length	As per ASME B16.9
Connection Type	Flanged (ASME B16.5), Welded
Pressure Rating	PN10 to PN100

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 6708, ASME B31.3, DIN 2615

Parent Products

This component is used in the following industrial products

Reflux Drum

A vessel in a distillation column system that collects condensed overhead vapor and returns a portion as reflux to the column.

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Vapor-Liquid Separator

A device that separates vapor from liquid phases in a vacuum evaporation system.

View Product Details

Engineering Analysis

Risks & Mitigation

Liquid carryover leading to downstream equipment damage
Erosion-corrosion at high velocities
Flange leakage under thermal cycling

FMEA Triads

Trigger: Inadequate nozzle sizing or high vapor velocity
Failure: Liquid entrainment in vapor stream
Mitigation: Design per API 12J guidelines; install mesh pads or demisters upstream.

Trigger: Corrosive process fluids
Failure: Nozzle wall thinning or pitting
Mitigation: Use corrosion-resistant alloys; implement regular thickness monitoring.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ASME B16.25; pressure ratings as per design code.

Test Method

Hydrostatic testing at 1.5x design pressure; NDE (RT/UT) for weld joints.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Vapor Outlet Nozzle

Manufacturer profiles associated with Vapor Outlet Nozzle.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What is the primary function of a vapor outlet nozzle?

To safely and efficiently discharge vapor or gas from a reflux drum while preventing liquid carryover and maintaining process stability.

How do you select the material for a vapor outlet nozzle?

Based on process conditions: pressure, temperature, and fluid corrosivity. Common choices include carbon steel for non-corrosive services and stainless steel for corrosive or high-purity applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Vapor Outlet Nozzle