Industry-Verified Manufacturing Data (2026)

Storage Section / Feedwater Tank

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Storage Section / Feedwater Tank used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Storage Section / Feedwater Tank is characterized by the integration of Shell and Heads (Dished Ends). In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The storage section of a deaerator that holds treated feedwater before distribution to boilers.

Product Specifications

Technical details and manufacturing context for Storage Section / Feedwater Tank

Definition
The Storage Section/Feedwater Tank is an integral component of a deaerator system. It serves as a reservoir for the deaerated, oxygen-free feedwater after it has passed through the deaeration section. This tank maintains a sufficient volume of treated water to ensure a steady, uninterrupted supply to the boiler feed pumps, helping to buffer against fluctuations in demand and providing a final stage for any residual gases to separate.
Working Principle
Deaerated water from the spray or tray section flows into the storage tank. The tank is typically maintained at a specific pressure and temperature (slightly above atmospheric boiling point) to prevent re-dissolution of gases. The large volume allows for thermal storage and provides residence time for any minute gas bubbles to rise to the surface and be vented. Water is drawn from the bottom of the tank by feed pumps for delivery to the boiler.
Common Materials
Carbon Steel, Stainless Steel (for corrosive feedwater)
Technical Parameters
  • Storage capacity, determining the system's buffer time and reserve volume. (m³) Per Request
Components / BOM
  • Shell
    The main pressure-retaining cylindrical body of the tank.
    Material: Carbon Steel or Stainless Steel
  • Heads (Dished Ends)
    The curved end closures of the cylindrical shell.
    Material: Carbon Steel or Stainless Steel
  • Inlet Nozzle
    Connection point for receiving deaerated water from the deaeration section.
    Material: Carbon Steel or Stainless Steel
  • Outlet Nozzle
    Connection point at the bottom for feedwater discharge to the boiler feed pumps.
    Material: Carbon Steel or Stainless Steel
  • Manway
    Access hatch for internal inspection and maintenance.
    Material: Carbon Steel or Stainless Steel
  • Level Gauge Connection
    Nozzle for installing level indication devices (sight glass, transmitter).
    Material: Carbon Steel or Stainless Steel
  • Vent Connection
    Nozzle for connecting a vent line to release any accumulated non-condensable gases.
    Material: Carbon Steel or Stainless Steel
  • Support Legs/Skirt
    Structural supports to hold the tank in its installed position.
    Material: Carbon Steel
Engineering Reasoning
0.1-2.0 MPa (1-20 bar) at 105-120°C
Pressure exceeding 2.5 MPa (25 bar) or temperature exceeding 150°C
Design Rationale: Yield strength of carbon steel (ASTM A516 Grade 70) at 150°C reduces to 205 MPa, causing plastic deformation when hoop stress exceeds material strength according to Barlow's formula: σ = P·D/(2·t)
Risk Mitigation (FMEA)
Trigger Oxygen concentration exceeding 7 ppb in feedwater
Mode: Pitting corrosion at 0.5 mm/year rate in carbon steel surfaces
Strategy: Maintain dissolved oxygen below 5 ppb using mechanical deaeration and chemical oxygen scavengers (hydrazine or carbohydrazide)
Trigger Thermal cycling exceeding 50°C/min during startup/shutdown
Mode: Low-cycle fatigue cracking at weld joints after 10,000 cycles
Strategy: Implement controlled heating/cooling rates below 30°C/min with preheating to 80°C minimum before steam admission

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Storage Section / Feedwater Tank.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0-10 bar (0-145 psi) typical, up to 15 bar (218 psi) for pressurized designs
flow rate: 10-500 m³/h (44-2200 gpm) depending on tank capacity and system demand
temperature: 105-120°C (221-248°F) typical, up to 150°C (302°F) for high-pressure systems
slurry concentration: Not applicable - designed for clean, deaerated water only
Media Compatibility
✓ Deaerated boiler feedwater ✓ Condensate return ✓ Chemically treated demineralized water
Unsuitable: Corrosive fluids (acids, chlorides) or abrasive slurries
Sizing Data Required
  • Maximum system flow rate (m³/h or gpm)
  • Required storage capacity (minutes of system demand)
  • Operating pressure and temperature requirements

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion and pitting
Cause: Dissolved oxygen in feedwater reacting with tank metal, accelerated by improper chemical treatment or stagnant water conditions.
Cavitation damage at pump suction
Cause: Insufficient net positive suction head (NPSH) due to low water level, high temperature, or pump oversizing causing vapor bubble formation and collapse.
Maintenance Indicators
  • Visible rust streaks or weeping at tank seams/welds indicating active corrosion
  • Unusual pump noise (cracking/popping sounds) from cavitation or fluctuating level gauge readings
Engineering Tips
  • Implement continuous oxygen scavenging and pH control with automated chemical injection, plus regular internal inspections for coating integrity
  • Maintain minimum water level above pump suction per NPSH requirements, install vortex breakers, and verify pump curves match system demand

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ASME BPVC Section VIII - Rules for Construction of Pressure Vessels EN 13445 - Unfired Pressure Vessels
Manufacturing Precision
  • Wall Thickness: +/-0.5mm
  • Nozzle Alignment: +/-1.5mm
Quality Inspection
  • Hydrostatic Pressure Test
  • Ultrasonic Thickness Testing

Factories Producing Storage Section / Feedwater Tank

Verified manufacturers with capability to produce this product in China

✓ 95% Supplier Capability Match Found

S Sourcing Manager from Brazil Jan 04, 2026
★★★★★
"Testing the Storage Section / Feedwater Tank now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Canada Jan 01, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from United States Dec 29, 2025
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Storage Section / Feedwater Tank meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

19 sourcing managers are analyzing this specification now. Last inquiry for Storage Section / Feedwater Tank from Vietnam (1h ago).

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Frequently Asked Questions

What is the purpose of the storage section in a deaerator feedwater system?

The storage section holds treated, deaerated feedwater before it's distributed to boilers, ensuring a consistent supply of oxygen-free water to prevent corrosion and maintain boiler efficiency.

When should stainless steel be used instead of carbon steel for feedwater tanks?

Stainless steel is recommended for feedwater tanks when handling corrosive feedwater or in applications requiring higher corrosion resistance, while carbon steel is suitable for standard industrial applications with proper treatment.

What are the key components included in a typical feedwater tank BOM?

A standard bill of materials includes shell, dished heads, inlet/outlet nozzles, manway for maintenance, level gauge connection, vent connection, and support legs or skirt for structural stability.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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