INDUSTRY COMPONENT

Header Shell

Header shell is the outer casing component of tube sheets/headers in heat exchangers and pressure vessels, providing structural integrity and containment.

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Component Specifications

Definition
A header shell is a cylindrical or rectangular structural component that encloses the tube sheet assembly in heat exchangers, boilers, condensers, and pressure vessels. It serves as the primary pressure boundary, containing the fluid medium while providing support for internal components like tubes, baffles, and partitions. The shell is designed to withstand operational pressures, thermal stresses, and mechanical loads while maintaining leak-tight integrity.
Working Principle
The header shell operates as a pressure vessel component that contains fluid under pressure or vacuum conditions. It distributes mechanical stresses evenly through its geometry, transfers thermal energy between internal and external environments, and provides mounting surfaces for nozzles, flanges, and support structures. The shell's design ensures proper fluid distribution across tube bundles while maintaining structural stability under cyclic loading.
Materials
Carbon steel (ASTM A516 Gr.70), Stainless steel (304/316L), Duplex stainless steel (2205), Nickel alloys (Inconel 625), Titanium (Grade 2), Aluminum alloys (6061-T6) with material thickness ranging from 6mm to 50mm depending on pressure rating.
Technical Parameters
  • Length Range 500-6000 mm
  • Weld Quality 100% radiographic testing
  • Diameter Range 200-2000 mm
  • Surface Finish Ra 3.2 μm minimum
  • Pressure Rating 150-3000 PSI
  • Temperature Range -50°C to 450°C
  • Flatness Tolerance ±1.5 mm/m
Standards
ISO 16812, DIN EN 13445, ASME BPVC Section VIII

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Header Shell.

header shell tube sheet casing heat exchanger components pressure vessel parts industrial headers boiler shells condenser housings Header Shell in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Tube Sheets/Headers

Structural components in economizers that secure heat exchanger tubes and distribute/collect working fluids.

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Engineering Analysis

Risks & Mitigation
  • Stress corrosion cracking
  • Thermal fatigue failure
  • Weld defect propagation
  • Creep deformation at high temperatures
  • Erosion-corrosion in aggressive media
FMEA Triads
Trigger: Inadequate material selection for corrosive service
Failure: Premature wall thinning and leakage
Mitigation: Implement corrosion allowance calculations and select appropriate corrosion-resistant alloys based on fluid analysis
Trigger: Improper welding procedures
Failure: Weld cracking under thermal cycling
Mitigation: Follow qualified welding procedures (WPS/PQR), perform post-weld heat treatment, and conduct NDT verification

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% on diameter, ±1.0% on length, ±0.2° on nozzle alignment
Test Method
Hydrostatic pressure test per ASME BPVC Section VIII Div.1, PMI verification, dimensional inspection per ISO 2768-mK

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between header shell and pressure vessel shell?

Header shells are specifically designed for tube sheet/header assemblies in heat exchangers, featuring precise nozzle alignments and internal baffle attachments, while general pressure vessel shells have broader applications with simpler internal configurations.

How are header shells tested for quality assurance?

Header shells undergo hydrostatic testing at 1.5x design pressure, radiographic weld examination, ultrasonic thickness testing, dimensional verification, and surface inspection per ASME and ISO standards.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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