Large Diameter Tube Sheet

Large Diameter Tube Sheet

Mastering the Scale: Heavy-Duty Solutions for Massive Heat Exchange Systems

Our Large Diameter Tube Sheets are engineered to meet the rigorous demands of mega-scale industrial projects. As a critical barrier and support structure in massive heat exchangers, reactors, and condensers, these components require extreme precision over vast surface areas. We specialize in manufacturing oversized tube sheets that maintain structural integrity and sealing performance under high pressure and thermal stress, bridging the gap between heavy forging and precision machining.

Key Features & Benefits

• Precision at Scale: Utilizing advanced CNC gantry drilling and deep-hole drilling technologies, we ensure accurate hole patterns (triangular, square, rotated) across diameters exceeding 4 meters, guaranteeing perfect tube alignment.

• Heavy-Duty Forging Capability: Capable of producing monolithic forgings up to 9 meters in diameter, eliminating the need for spliced welds and ensuring superior grain structure and mechanical strength.

• Thermal Stress Management: Designed to accommodate significant thermal expansion, our large tube sheets can be integrated with expansion joints or designed as floating heads to prevent warping and failure in high-temperature differentials.

• Corrosion-Resistant Cladding: For large-scale applications where solid alloy is cost-prohibitive, we offer explosion-bonded or roll-bonded clad plates (e.g., Carbon Steel base with Stainless Steel/Nickel cladding) to provide corrosion resistance at a fraction of the weight and cost.

• Strict Flatness Control: Advanced heat treatment and stress-relief processes are employed to maintain flatness and perpendicularity, critical for preventing leaks in massive tube bundles.

Technical Specifications

• Diameter Range: From 1000mm up to 9000mm (Custom Forging)

• Thickness: Up to 500mm+ (depending on pressure requirements)

• Drilling Depth: Deep-hole drilling capabilities for thick tube sheets

• Standards Compliance: ASME Section VIII, TEMA, EN 13445, GB/T 151

• Tolerance: High-precision hole pitch tolerance (±0.6mm cumulative) and surface finish (Ra 12.5 - 25μm)

Available Materials

We select materials based on the specific corrosive and thermal environment of your plant:

• Carbon Steel: Q345R, ASTM A516 Gr. 60/70, A266 (For non-corrosive, high-pressure environments)

• Stainless Steel: 304/L, 316/L, 321, 347 (For general corrosion resistance)

• High-Performance Alloys: 16Mn, Titanium Alloy, Duplex/Super Duplex (For aggressive chemical or seawater applications)

• Clad Plates: Carbon steel backing with SS/Ni/Ti cladding for large diameter cost-efficiency

Applications

Our Large Diameter Tube Sheets are the backbone of heavy industry:

• Petrochemical Giants: Ethylene crackers, styrene reactors, and large condensers.

• Power Generation: Nuclear steam generators and thermal power plant feedwater heaters.

• Desalination Plants: Multi-stage flash distillation units requiring massive heat transfer surfaces.

• HVAC & Refrigeration: Industrial chillers and large central air conditioning systems.

• Fertilizer Production: High-pressure ammonia and urea synthesis loops.

Quality Assurance & Packaging

Manufacturing large diameter components requires rigorous quality control to prevent defects that could lead to catastrophic failure.

• Ultrasonic Testing (UT): 90% volumetric inspection of the forging to detect internal laminations or inclusions.

• CNC Inspection: Digital mapping of hole patterns to ensure alignment across thousands of tubes.

• Hardness & Impact Testing: Ensuring the material can withstand thermal shock and high pressure.

• Surface Protection: Machined faces are coated with rust inhibitors and protected with wooden or steel covers to prevent damage to the tube holes during ocean freight.