INDUSTRY COMPONENT

Cylindrical Shell

Cylindrical shell is the primary structural component of reactors and pressure vessels, designed to contain fluids under high pressure and temperature conditions.

Component Specifications

Definition
A cylindrical shell is a hollow, circular cross-section structural element that forms the main body of reactors, pressure vessels, and storage tanks. It is engineered to withstand internal pressure, external loads, and thermal stresses while maintaining structural integrity and preventing leakage. The shell's geometry provides optimal stress distribution and efficient use of materials for pressure containment applications.
Working Principle
The cylindrical shell operates on the principle of membrane theory, where internal pressure creates hoop stress (circumferential) and longitudinal stress (axial) in the shell wall. The uniform curvature distributes stresses evenly, allowing the structure to contain pressure with minimal material thickness. The shell transfers loads through its curved surface to supporting structures while maintaining a sealed environment for chemical reactions or storage.
Materials
Carbon steel (SA-516 Gr.70), Stainless steel (304/316L), Alloy steel (SA-387 Gr.11/22), Nickel alloys (Inconel 625), Titanium, Duplex stainless steels (2205), Clad materials (explosion-bonded or roll-bonded)
Technical Parameters
  • Length 1000-30000 mm
  • Diameter 500-10000 mm
  • Thickness 6-150 mm
  • Straightness 1 mm per meter
  • Surface Finish Ra 0.8-3.2 μm
  • Design Pressure Up to 300 bar
  • Design Temperature -50°C to 500°C
  • Roundness Tolerance ±0.1% of diameter
Standards
ISO 16528, ASME BPVC Section VIII, EN 13445, PED 2014/68/EU

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cylindrical Shell.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Stress corrosion cracking in chloride environments
  • Hydrogen embrittlement in high-strength steels
  • Creep deformation at elevated temperatures
  • Brittle fracture at low temperatures
  • Fatigue failure from cyclic loading
FMEA Triads
Trigger: Inadequate corrosion allowance
Failure: Wall thinning and eventual rupture
Mitigation: Specify proper corrosion allowance based on service environment and implement regular thickness monitoring
Trigger: Poor weld quality at longitudinal seams
Failure: Crack propagation and catastrophic failure
Mitigation: Implement strict weld procedure qualifications, 100% radiographic testing, and post-weld heat treatment
Trigger: Thermal cycling beyond design limits
Failure: Thermal fatigue cracking
Mitigation: Design for thermal stress relief, use expansion joints, and control heating/cooling rates during operation

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Diameter tolerance: ±0.25% of nominal diameter or ±3 mm (whichever is greater), Thickness tolerance: +10%/-0% of specified thickness
Test Method
Hydrostatic test at 1.3x design pressure, Pneumatic test at 1.1x design pressure, Non-destructive examination per ASME Section V

Buyer Feedback

★★★★☆ 4.9 / 5.0 (8 reviews)

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

"Reliable performance in harsh Chemical Manufacturing environments. No issues with the Cylindrical Shell so far."

"Testing the Cylindrical Shell now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

What are the main failure modes of cylindrical shells?

Primary failure modes include buckling under external pressure, fatigue cracking at weld joints, corrosion-induced thinning, stress corrosion cracking, and plastic collapse from overpressure.

How is shell thickness determined for pressure vessels?

Thickness is calculated using ASME BPVC formulas considering design pressure, material allowable stress, joint efficiency, corrosion allowance, and minimum required thickness for structural stability.

What inspection methods ensure shell integrity?

Ultrasonic testing (UT) for thickness measurement, radiographic testing (RT) for weld quality, magnetic particle testing (MT) for surface cracks, and hydrostatic pressure testing for leak verification.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Crystalline Form Demister Pad / Mesh