Editorial Technical Reference

Heat Exchanger Core

This page explains how Heat Exchanger Core is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

The central heat transfer component within a feed preheater that facilitates thermal energy exchange between fluid streams.

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Product Specifications

Technical details and manufacturing context for Heat Exchanger Core

Definition
The heat exchanger core is the essential internal component of a feed preheater responsible for the efficient transfer of thermal energy from a hot fluid stream (e.g., steam, hot process fluid) to a colder feed stream. It consists of a structured assembly of tubes, plates, or fins that maximize surface area for heat transfer while maintaining separation between the two fluids. The core is typically manufactured from materials such as stainless steel, carbon steel, copper-nickel alloy, or titanium, depending on the application's corrosion and temperature requirements. Key design parameters include design pressure (1.0–1.6 MPa), design temperature (150–200°C per GB/T 151), heat transfer area (5–50 m²), flow rate (10–100 m³/h), plate thickness (0.5–0.8 mm per GB/T 3280), plate material (SS304/SS316L per ASTM A240), gasket material (NBR/EPDM), connection size (DN25–DN150 per GB/T 9112), overall dimensions (500×300×300 to 2000×1000×1000 mm), weight (50–500 kg), leakage rate (≤0.1 mL/min per GB/T 151), and corrosion allowance (1–3 mm per GB/T 151). These values are reference ranges and must be verified for the specific model and application. The core operates by allowing hot and cold fluids to flow on opposite sides of thin walls, transferring heat through conduction without mixing. Proper selection requires evaluating fluid compatibility, operating conditions, and space constraints. Maintenance signals include increased leakage rate, reduced thermal performance, or visible corrosion. Failure boundaries include exceeding design pressure or temperature, which can lead to gasket failure or structural damage. Always consult the legal manufacturer or supplier to confirm model-specific values and standards.
Working Principle
Heat is transferred from the hot side fluid to the cold side fluid through conduction across the core's material walls (tubes, plates). The core's design (e.g., tube bundle, plate stack) creates a large surface area to maximize heat transfer efficiency. The fluids flow on opposite sides of these walls without mixing, allowing the feed stream to be preheated before entering the main process. The efficiency depends on the thermal conductivity of the wall material, the surface area, and the temperature difference between the fluids. The core's geometry and flow arrangement (counterflow, crossflow) influence the heat transfer rate and pressure drop. Proper flow rates and temperature differentials must be maintained to achieve the desired preheating effect.
Common Materials
Stainless Steel, Carbon Steel, Copper-Nickel Alloy, Titanium
Technical Parameters
ParameterTypical rangeNotes & selection driver
Design Temperature150–200 °CAbove 200°C requires special gasket materialGB/T 151
Heat Transfer Area5–50 m²Determines thermal capacity
Flow Rate10–100 m³/hHigher flow increases pressure drop
Plate Thickness0.5–0.8 mmThinner plates improve heat transfer but reduce corrosion allowanceGB/T 3280
Plate MaterialSS304/SS316LSS316L for chloride environmentsASTM A240
Gasket MaterialNBR/EPDMEPDM for high temperature, NBR for oil resistance
Connection SizeDN25–DN150 mmMust match piping systemGB/T 9112
Overall Dimensions500×300×300 – 2000×1000×1000 mmSpace constraints for installation
Weight50–500 kgAffects handling and support structure
Leakage Rate≤0.1 mL/minExceeds limit indicates gasket failureGB/T 151
Corrosion Allowance1–3 mmBased on fluid corrosivity and design lifeGB/T 151

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

Components / BOM
  • Tubes or Plates Part
    Form the primary conductive barrier for heat transfer between the two fluid streams.
    Material: Stainless Steel
  • Tube Sheets / Plate Frames Part
    Secure the ends of tubes or edges of plates, providing structural integrity and separating fluid headers.
    Material: Carbon Steel
  • Baffles / Spacers Part
    Support tubes/plates, maintain proper spacing, and direct fluid flow to enhance heat transfer and prevent vibration.
    Material: Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Feed Preheater
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Heating Section
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Cooling Heat Exchanger or Chiller Unit
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Aftercooler
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 25 bar (design dependent)
flow rate: 0.5-50 m³/h per stream
temperature: -40°C to 400°C
slurry concentration: Max 15% solids by weight
Media Compatibility
✓ Process water/steam ✓ Thermal oils ✓ Non-corrosive gases
Unsuitable: Highly corrosive acids (e.g., concentrated sulfuric acid)
Sizing Data Required
  • Heat duty (kW)
  • Inlet/outlet temperatures for both streams
  • Allowable pressure drop (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Fouling
Cause: Accumulation of deposits (scale, biological growth, particulates) on heat transfer surfaces, reducing thermal efficiency and increasing pressure drop.
Corrosion
Cause: Chemical attack from process fluids or cooling water, leading to material degradation, pitting, and eventual leakage, often exacerbated by temperature, pH, and contaminants.
Maintenance Indicators
  • Significant drop in heat transfer efficiency (e.g., outlet temperature deviates from design by >5%)
  • Audible vibration or hammering noises indicating flow-induced vibration or potential tube failure
Engineering Tips
  • Implement regular chemical cleaning or mechanical descaling based on fluid analysis to prevent fouling buildup.
  • Use corrosion-resistant materials (e.g., titanium, stainless steel) or protective coatings, and control water chemistry (pH, chlorides) to minimize corrosive environments.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 15547:2016 (Petroleum, petrochemical and natural gas industries - Plate-type heat exchangers) ASME BPVC Section VIII (Boiler and Pressure Vessel Code - Rules for construction of pressure vessels) EN 13445 (Unfired pressure vessels - European standard for pressure vessel design and manufacture)

Quoted from the published standard.

Manufacturing Precision
  • Tube-to-tube sheet weld alignment: ±0.5 mm
  • Plate flatness deviation: ≤0.3 mm per meter
Quality Inspection
  • Hydrostatic pressure test (1.5x design pressure for 30 minutes)
  • Eddy current testing of heat exchanger tubes for wall thickness and defects

Manufacturers of Heat Exchanger Core

Manufacturer profiles associated with Heat Exchanger Core.

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Frequently Asked Questions

What materials are commonly used for heat exchanger cores?

Common materials include stainless steel, carbon steel, copper-nickel alloy, and titanium. The choice depends on the fluid corrosivity, temperature, and required corrosion allowance. For chloride environments, SS316L is often specified. Always confirm material suitability with the manufacturer.

What is the typical design pressure and temperature range?

The design pressure range is 1.0–1.6 MPa, and the design temperature range is 150–200°C per GB/T 151. These are reference values; the actual limits depend on the specific model and application. Exceeding these limits can cause gasket failure or structural damage.

How do I select the correct heat transfer area?

The heat transfer area (5–50 m²) determines the thermal capacity. Selection depends on the required heat duty, flow rates, and temperature differences. A larger area increases heat transfer but also affects size and cost. Consult the manufacturer for sizing calculations based on your process conditions.

What maintenance signals indicate a problem with the core?

Signs include increased leakage rate (above 0.1 mL/min per GB/T 151), reduced thermal performance, visible corrosion, or unusual pressure drops. Regular inspection of gaskets and plates is recommended. If leakage exceeds the limit, it may indicate gasket failure, requiring replacement.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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