INDUSTRY COMPONENT

Heads

Hemispherical or elliptical end closures for reflux drums in distillation systems.

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Component Specifications

Definition
Heads are the end closures of a reflux drum, designed to withstand internal pressure and temperature variations in distillation processes. They provide structural integrity and facilitate fluid distribution within the drum, typically featuring nozzles for inlet/outlet connections and manways for maintenance access.
Working Principle
Heads distribute mechanical stress evenly across their curved surfaces to contain process fluids under pressure. In reflux drums, they help maintain vapor-liquid equilibrium by allowing proper phase separation and flow distribution, with shapes optimized for pressure resistance and minimal stress concentration.
Materials
Carbon steel (SA-516 Gr.70), stainless steel (SA-240 Type 316L), clad materials for corrosive services, with thickness ranging from 6mm to 50mm depending on design pressure.
Technical Parameters
  • Head Type Ellipsoidal (2:1) or Hemispherical
  • Surface Finish Ra ≤ 3.2 μm for internal surfaces
  • Design Pressure Up to 50 bar
  • Design Temperature -29°C to 400°C
  • Connection Standards ASME B16.5
Standards
ASME BPVC Section VIII, EN 13445, ISO 28300

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Heads.

reflux drum heads pressure vessel heads distillation equipment ASME heads elliptical heads hemispherical heads chemical manufacturing components Heads Heads in Chemical Manufacturing

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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Mud Drum

A pressure vessel in waste heat boilers that collects and removes solid impurities (mud) from boiler water.

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Engineering Analysis

Risks & Mitigation
  • Stress corrosion cracking in chloride environments
  • Fatigue failure from cyclic pressure/temperature changes
  • Improper installation causing leakage at seams
FMEA Triads
Trigger: Corrosive process fluids
Failure: Wall thinning and eventual rupture
Mitigation: Regular thickness monitoring and material upgrade to corrosion-resistant alloys
Trigger: Thermal cycling
Failure: Fatigue cracks at nozzle junctions
Mitigation: Design with reinforced openings and controlled heating/cooling rates

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerance per ASME B16.9: ±1.6mm on diameter, ±0.8mm on nozzle alignment
Test Method
Hydrostatic testing at 1.5x design pressure, radiographic examination of welds, liquid penetrant testing for critical seams

Buyer Feedback

★★★★☆ 4.7 / 5.0 (14 reviews)

"The Heads we sourced perfectly fits our Chemical Manufacturing production line requirements."

"Found 26+ suppliers for Heads on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Heads is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What are the main types of heads used in reflux drums?

Ellipsoidal (2:1 ratio) heads are most common for standard pressure applications, while hemispherical heads are used for higher pressure services due to better stress distribution.

How do material choices affect head performance?

Carbon steel offers cost-effectiveness for non-corrosive services, while stainless steel or clad materials provide corrosion resistance for acidic or high-purity applications in chemical manufacturing.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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