Tube Sheets and Headers for Economizers

Product Specifications

Technical details and manufacturing context for Tube Sheets/Headers

Definition

Tube sheets (or tube plates) are flat plates with precisely drilled holes that hold and support the ends of heat exchanger tubes in an economizer, maintaining tube alignment and preventing fluid leakage between tube-side and shell-side flows. Headers (or manifolds) are cylindrical or box-shaped chambers that distribute incoming fluid to multiple tubes (inlet header) or collect fluid from multiple tubes (outlet header), ensuring uniform flow distribution across the tube bundle for optimal heat transfer efficiency. These components are typically manufactured from carbon steel, stainless steel, or alloy steel, with material selection based on operating conditions such as design pressure, temperature, and corrosion requirements. Key parameters include design pressure (1.0–16.0 MPa), design temperature (-20–400 °C), tube hole diameter (15–60 mm), tube hole tolerance (±0.05 mm), surface roughness (Ra 3.2–6.3 µm), plate thickness (10–100 mm), material grade (e.g., Q245R, Q345R, 16Mn, 304, 316L), corrosion allowance (1.0–3.0 mm), tube hole pitch (20–80 mm), weight (50–5000 kg), overall dimensions (500–5000 mm), and joint leakage rate (≤0.1 mL/min). These values are reference ranges and must be verified for the specific model and application. Relevant standards include GB/T 16507, GB/T 151, GB/T 1800, GB/T 1031, GB/T 709, GB/T 713, and GB/T 4237. Always confirm model-specific values and compliance with the legal manufacturer or supplier.

Working Principle

Tube sheets provide mechanical support and sealing for tubes, with gaskets or welded joints preventing cross-contamination between fluid streams. Headers use internal baffles or distribution plates to evenly divide incoming fluid into parallel tube circuits, minimizing pressure drop and thermal stress while maximizing heat recovery from flue gases. The design must ensure proper tube-to-tubesheet joint integrity, uniform flow distribution, and adequate strength to withstand pressure and temperature variations. Verification of joint leakage rate under hydrostatic testing is critical to ensure no leakage.

Common Materials

Carbon steel, Stainless steel, Alloy steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Design Pressure	1.0–16.0 MPa	Determines wall thickness and material grade.GB/T 16507
Design Temperature	-20–400 °C	Affects material selection and thermal expansion.GB/T 16507
Tube Hole Diameter	15–60 mm	Must match tube outer diameter and tolerance.GB/T 151
Tube Hole Tolerance	±0.05 mm	Ensures proper tube-to-tubesheet joint integrity.GB/T 1800
Surface Roughness	Ra 3.2–6.3 µm	Critical for sealing surfaces and corrosion resistance.GB/T 1031
Plate Thickness	10–100 mm	Determines strength and rigidity under pressure.GB/T 709
Material Grade	Q245R, Q345R, 16Mn, 304, 316L	Select based on corrosion resistance and temperature.GB/T 713, GB/T 4237
Corrosion Allowance	1.0–3.0 mm	Compensates for material loss over service life.GB/T 16507
Tube Hole Pitch	20–80 mm	Affects ligament efficiency and structural strength.GB/T 151
Weight	50–5000 kg	Important for handling and installation.
Overall Dimensions	500–5000 mm	Diameter or length depending on configuration.
Joint Leakage Rate	≤0.1 mL/min	Ensures no leakage under hydrostatic test.GB/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

Tube Sheet Plate Part
Main structural plate with drilled holes for tube insertion and support

Material: Carbon steel or alloy steel
Header Shell Part
Cylindrical or rectangular pressure vessel for fluid distribution/collection

Material: Carbon steel or stainless steel
Tube-to-Tubesheet Joint Part
Welded or expanded connection securing tubes to tube sheet

Material: Welding consumables matching tube material
Distribution Baffle Part
Internal plate in header to ensure even fluid distribution

Material: Carbon steel
Nozzle Connection Part
Pipe connection point for inlet/outlet piping

Material: Forged steel
Gaskets Optional
Seal the tube-to-tubesheet joint where welding is not used.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Tube Sheets/Headers.

Applied To / Applications

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

Economizer

View system integration details

Manufacturers of Tube Sheets/Headers

Manufacturer profiles associated with Tube Sheets/Headers.

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Frequently Asked Questions

What are tube sheets and headers used for in an economizer?

Tube sheets support and seal the ends of heat exchanger tubes, while headers distribute incoming fluid to multiple tubes or collect fluid from them, ensuring uniform flow and efficient heat transfer.

What materials are commonly used for tube sheets and headers?

Common materials include carbon steel, stainless steel, and alloy steel. The specific grade depends on operating pressure, temperature, and corrosion requirements.

What standards apply to tube sheets and headers?

Relevant standards include GB/T 16507 for pressure, GB/T 151 for heat exchangers, GB/T 1800 for tolerances, GB/T 1031 for surface roughness, and GB/T 709 for plate thickness. Always verify compliance with the manufacturer.

How is the joint leakage rate verified?

Joint leakage rate is verified through hydrostatic testing, with a maximum allowable leakage of ≤0.1 mL/min as per GB/T 151. This ensures no leakage under test conditions.

Data Basis

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

Preliminary Technical Classification

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pressure:	Up to 1500 psi (10.3 MPa)
flow rate:	Dependent on tube diameter and number of tubes, typically 0.5-10 m/s fluid velocity
temperature:	-40°C to 400°C

Tube Sheets/Headers

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards