ASME SA179 Carbon Steel Seamless Heat Exchanger U Bend Tube

Product Specification

ASTM A179 / ASME SA179 Carbon Steel Seamless U Bend Tube for Heat Exchangers

ASTM A179 Seamless U Bend Tubes for Heat Transfer Equipment

ASTM A179 / ASME SA179 Carbon Steel Seamless U Bend Tubes are precision cold-drawn low-carbon steel tubes designed for shell-and-tube heat exchangers, condensers, boilers, economizers and similar heat transfer equipment. The seamless construction eliminates longitudinal welds, while the precision U-bending process reduces welding joints during tube bundle fabrication and supports efficient fluid flow.

Manufactured in accordance with ASTM A179 and ASME SA179 specifications, these tubes offer uniform wall thickness, good dimensional accuracy and reliable mechanical properties for low- and medium-pressure heat transfer applications. Each U bend tube can be supplied with custom bend radius, leg length and heat treatment according to project requirements.

Technical Specifications

Chemical Composition

Mechanical Properties

Product Features

• Precision Cold Drawn Seamless Construction

Manufactured using a seamless cold-drawn process to provide accurate dimensions, smooth internal surfaces and consistent wall thickness for heat transfer equipment.

• High Heat Transfer Efficiency

The seamless tube structure and uniform wall thickness support efficient heat exchange in condensers, heat exchangers and boilers.

• Precision U Bending

U bending minimizes welding joints in tube bundles, helping simplify equipment assembly and reduce potential leakage points.

• Good Fabrication Performance

Suitable for bending, expanding, welding and tube sheet installation during heat exchanger manufacturing.

• Reliable Mechanical Performance

Produced in accordance with ASTM A179 dimensional and mechanical property requirements for low- and medium-pressure service.

Why Choose U Bend Tubes for Heat Exchangers?

Compared with straight tubes, U bend tubes provide several engineering advantages:

• Reduce welding joints within tube bundles

• Simplify heat exchanger fabrication

• Improve space utilization inside equipment

• Reduce potential leakage locations

• Support efficient fluid circulation

• Suitable for compact heat exchanger designs

Available Dimensions

Applications

ASTM A179 Seamless U Bend Tubes are widely used in:

• Shell & Tube Heat Exchangers

• Surface Condensers

• Power Plant Heat Exchangers

• Petrochemical Equipment

• Oil & Gas Processing Plants

• Boilers

• Economizers

• Feedwater Heaters

• Chemical Processing Equipment

• HVAC Heat Exchange Systems

Inspection and Testing

Each production batch can be inspected according to ASTM requirements or customer specifications.

Available inspection methods include:

• Hydrostatic Test

• Eddy Current Test (ECT)

• Ultrasonic Test (UT)

• Positive Material Identification (PMI)

• Chemical Composition Analysis

• Mechanical Property Test

• Dimensional Inspection

• Bend Radius Inspection

• Wall Thickness Measurement

• Visual Inspection

Related Products

• ASTM A179 Straight Seamless Tube

• ASTM A192 Boiler Tube

• ASTM A210 Gr.A1 Seamless Tube

• ASTM A213 TP304 U Bend Tube

• ASTM A213 TP316L U Bend Tube

• ASTM A556 Feedwater Heater Tube

Frequently Asked Questions

• What is ASTM A179 U Bend Tube?

ASTM A179 U Bend Tube is a seamless cold-drawn low-carbon steel tube that is bent into a U shape for use in shell-and-tube heat exchangers and condensers.

• Why are U bend tubes preferred in heat exchangers?

U bend tubes reduce welding joints, simplify tube bundle fabrication and allow compact heat exchanger designs.

• Is heat treatment required after U bending?

Stress relief heat treatment can be performed after bending when specified by project requirements or applicable standards.

• Can customized dimensions be supplied?

Yes. Outside diameter, wall thickness, bend radius and leg length can all be manufactured according to customer drawings.

• What inspections are available?

Hydrostatic testing, eddy current testing, ultrasonic testing, PMI, dimensional inspection and mechanical testing are available according to customer requirements.

• Which industries commonly use ASTM A179 U bend tubes?

These tubes are commonly used in power generation, petrochemical processing, oil and gas facilities, chemical plants and industrial heat exchange systems.

Why Choose YUHONG ASTM A179 U Bend Tubes

• Manufactured in accordance with ASTM A179 / ASME SA179

• Precision cold-drawn seamless tubes with consistent dimensions

• Custom U bend radius and leg length available

• Comprehensive inspection and testing options

• Suitable for heat exchangers, condensers and boilers

• Export-grade packaging for global project delivery