Tube sheet flange

Tube sheet flange

High-precision tube-sheet connection components with pressure- and temperature-resistant performance provide reliable sealing and structural support for your heat-exchange equipment.

Product Overview: What is a Tube Sheet Flange?

The tube sheet flange is a critical pressure-bearing component used in pressure vessels such as heat exchangers, boilers, and condensers to secure the tube bundle and to isolate the shell-side and tube-side fluids. It typically consists of a precision-machined circular plate with multiple tube holes. The outer periphery is equipped with a standard flange sealing surface and bolt holes for connection to the equipment shell or other pipeline flanges.

With two decades of specialized expertise in metal fabrication, Zhongfa Flange has a deep understanding of the critical role that tube sheets play in equipment. We not only offer custom-designed tube sheets tailored to your drawing specifications, but also provide expert guidance across multiple dimensions—ranging from material selection and process optimization to quality control—ensuring that every tube sheet delivers superior sealing performance, robust structural integrity, and extended service life.

Core Product Features and Manufacturing Advantages

Rigorous Materials Science and Heat Treatment

High-Quality Materials: Based on the corrosivity of the process medium, operating temperature, and pressure, we offer carbon steels (Q345R, 20#), stainless steels (304, 316L), alloy steels (16Mn, 15CrMo), and other materials.

Performance Assurance: All steel plates undergo ultrasonic testing (UT) and spectral analysis prior to storage. For medium- and thick-gauge plates, we employ a full-normalizing plus tempering heat treatment process to refine the grain structure, homogenize the microstructure, and relieve residual stresses.

High-Precision Tube Hole Machining Technology

Precision Control: The use of large CNC deep-hole drilling machines or vertical machining centers ensures dimensional accuracy for thousands of tube holes, including hole diameter tolerance, hole spacing accuracy, and perpendicularity. This lays a solid foundation for the seamless insertion and welding of heat exchanger tubes, as well as for uniform heat transfer.

Professional sealing surface and groove machining

Seal Surface Machining: The flange seal surfaces (RF/MFM) are precision-machined on CNC lathes to ensure superior surface finish and flatness, thereby achieving a perfect seal with the equipment housing.

Welding Bevels: Various pipe-hole welding bevels (such as I-shaped, V-shaped, and U-shaped) can be machined in accordance with the customer’s welding process requirements, facilitating high-strength welding of heat exchange tubes or lap-expansion operations.

Comprehensive Quality Inspection System

Full-process inspection: Continuous monitoring and inspection are carried out throughout the entire production process, from raw materials and rough machining to heat treatment and finish machining.

Final Inspection: 100% dimensional verification of finished products. Third-party test reports are available upon request.

Technical Specifications

Main Application Areas

Petrochemical industry: heat exchangers for atmospheric and vacuum distillation units in refineries; feed and product heat exchangers for hydrogenation reactors (e.g., E-101/102).

Power Generation: High- and low-pressure heaters, condensers, economizers, and air preheaters for power plants.

Pharmaceutical and food processing: sanitary-grade stainless steel tube sheets for fermenter jackets and process fluid heating/cooling systems.

Shipbuilding and Ocean Engineering: Central coolers, lubricating oil coolers, and vaporizers for LNG carriers.

District Heating: Plate heat exchangers or shell-and-tube heat exchangers are the core components of district heating systems.

Why choose Zhongli Flanders’ tube sheet products?

Equipment and Production Capacity Assurance: We are equipped with large CNC floor-type boring-milling machines, deep-hole drilling systems, and heat-treatment facilities, enabling us to undertake batch production and manufacture large monolithic components.

One-Stop Delivery: We offer end-to-end, full-service solutions spanning the entire production process—from raw material procurement and forging (where required) to heat treatment, machining, and finally, final product inspection, packaging, and shipment. Clear accountability at every stage ensures reliable delivery.

Get your customized solution and quote

Tube sheet flanges are highly customized products. Please provide your technical drawings or specific technical specifications, and our project engineers will:

Conduct a rapid technical review (response within 24 hours).

Provide a detailed process plan and a transparent quotation.

Provide accurate production cycle estimates.