ASME SA213 TP321 Seamless Stainless Steel U-Bend Heat Exchanger Tube for High-Temperature Service

ASME SA213 TP321 seamless stainless steel U-bend heat exchanger tubes are designed for shell-and-tube heat exchangers and other tubular heat transfer equipment. The tubes are supplied in a U-shaped configuration, allowing both tube ends to connect to the tube sheet while accommodating the required heat transfer length within the exchanger.

TP321 is a titanium-stabilized austenitic stainless steel grade specified under ASTM A213/ASME SA213. Its composition is intended to reduce the risk of chromium carbide precipitation associated with certain thermal exposure conditions. The grade is used in selected heat exchanger and high-temperature service applications, subject to the operating temperature, process medium and design requirements.

YUHONG supplies TP321 seamless U-bend tubes to specified dimensions, bend radii, leg lengths and inspection requirements for industrial heat exchanger projects.

The dimensions above describe the product shown in the reference image. Final dimensions, tolerances, heat treatment, testing and inspection requirements should be confirmed against the approved drawing and purchase order.

TP321 contains titanium as a stabilizing element. This helps control chromium carbide precipitation under relevant thermal exposure conditions and makes the grade suitable for selected elevated-temperature applications.

Seamless tubes are supplied without a longitudinal weld seam. This construction is commonly specified for heat exchanger tubing where seamless products are required by the project specification.

U-bending allows the tube to form the return path required by the heat exchanger design. Bend radius, wall thinning, ovality and dimensional tolerances should be evaluated according to the applicable specification and approved drawings.

• Shell-and-tube heat exchangers
• Industrial process heat transfer equipment
• Selected high-temperature heat exchanger systems
• Chemical and petrochemical process equipment
• Boiler and thermal equipment where TP321 is specified

Material selection should consider the process fluid, operating temperature, pressure, corrosion conditions and applicable design code.

U-bend tubes can be specified by the following parameters:

• Tube outside diameter and wall thickness
• U-bend radius
• Straight leg length and overall tube geometry
• Required tube length and dimensional tolerances
• Heat treatment and surface condition
• Applicable testing and inspection requirements
• Marking, packing and traceability requirements

Please provide the tube specification, dimensional drawing and required quantity when requesting a quotation.

Inspection and documentation can be arranged according to the applicable standard and purchase requirements, subject to order confirmation.

Typical inspection items may include:

• Verification of material grade and heat number
• Dimensional inspection of outside diameter and wall thickness
• U-bend radius and leg-length verification
• Visual inspection of tube surfaces and bent sections
• Applicable mechanical, chemical and nondestructive testing
• Inspection documentation and material traceability

Specific testing methods and acceptance criteria should be agreed before order placement.

U-bend tubes should be supported and secured to reduce bending damage, surface scratches and deformation during handling and transportation. Protective end caps, separators, suitable bundles or dedicated packing frames can be considered according to tube dimensions and shipment requirements.

Packing method, marking, delivery schedule and shipping terms are subject to order confirmation.