INDUSTRY COMPONENT

Casing

High-pressure containment structure for centrifugal compressors in ammonia synthesis loops

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Component Specifications

Definition
The casing is the primary pressure-retaining component of a centrifugal compressor in high-pressure ammonia synthesis loops, designed to contain the rotating assembly, direct process gas flow through impeller stages, withstand extreme internal pressures (typically 150-350 bar), and provide structural support for bearings and seals while maintaining precise alignment under thermal and mechanical stresses.
Working Principle
Provides a sealed pressure vessel that converts kinetic energy from rotating impellers into pressure energy by containing and directing gas flow through progressively smaller volutes or diffusers, while withstanding cyclic thermal expansion and high-pressure fatigue through engineered stress distribution.
Materials
Forged low-alloy steel (ASTM A350 LF2, A694 F60/F65) with corrosion-resistant cladding (Inconel 625 or 316L stainless steel) on internal surfaces; heat-treated to achieve 450-550 MPa yield strength with Charpy V-notch impact toughness >40J at -46°C.
Technical Parameters
  • Leak Rate < 0.1% of volume per hour
  • Surface Finish Ra ≤ 3.2 μm internally
  • Wall Thickness 80-150 mm nominal
  • Pressure Rating 150-350 bar design pressure
  • Temperature Range -50°C to +200°C
  • Hydrotest Pressure 1.5x design pressure
  • Dimensional Tolerance ±0.1% on bore diameter
Standards
ISO 10440-1, API 617, ASME BPVC Section VIII, DIN EN 13445

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Casing.

compressor casing high-pressure housing ammonia synthesis compressor centrifugal compressor components pressure vessel forged steel casing Casing Casing in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

High-Pressure Ammonia Synthesis Loop Centrifugal Compressor

Centrifugal compressor for circulating ammonia synthesis gas in high-pressure fertilizer production loops

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Process Pump

A mechanical device designed to move chemical fluids through filtration and separation processes by creating flow and pressure.

View Product Details

Sanitary Centrifugal Pump

A hygienic pump designed for transferring liquids in sanitary processing applications using centrifugal force.

View Product Details

Engineering Analysis

Risks & Mitigation
  • Hydrogen embrittlement in high-pressure service
  • Thermal stress cracking during rapid startups
  • Corrosion under insulation
  • Bolt fatigue in flange connections
  • Erosion at gas inlet areas
FMEA Triads
Trigger: Cyclic pressure and thermal stresses
Failure: Fatigue cracking initiating at stress concentrators
Mitigation: Finite element analysis during design, radius optimization at transitions, post-weld heat treatment, regular ultrasonic inspection
Trigger: Wet ammonia corrosion
Failure: Pitting and stress corrosion cracking
Mitigation: Corrosion-resistant cladding, controlled startup procedures to avoid condensation, online corrosion monitoring

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Bore concentricity within 0.05 mm TIR, flange flatness within 0.1 mm/m, wall thickness variation < 5%
Test Method
Hydrostatic pressure testing per ASME BPVC, ultrasonic examination per ASME SA-388, magnetic particle inspection per ASTM E709, dimensional verification with laser scanning

Buyer Feedback

★★★★☆ 4.8 / 5.0 (36 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Casing meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Casing arrived with full certification."

"Great transparency on the Casing components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

Why are casings in ammonia compressors typically forged rather than cast?

Forged construction provides superior grain structure, higher fatigue resistance, better mechanical properties at high pressures, and reduced defect probability compared to casting, which is critical for safety in high-pressure hydrogen-containing environments.

What maintenance is required for compressor casings?

Regular non-destructive testing (ultrasonic thickness measurement, dye penetrant inspection), bolt torque verification, corrosion monitoring of internal cladding, and alignment checks during major overhauls every 3-5 years.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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