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
|
Item |
Specification |
|---|---|
|
Product Name |
ASTM A179 / ASME SA179 Carbon Steel Seamless U Bend Tube |
|
Standard |
ASTM A179 / ASME SA179 |
|
Material Grade |
Low Carbon Steel |
|
Manufacturing Process |
Cold Drawn Seamless |
|
Product Type |
U Bend Tube |
|
Outside Diameter |
12.7–50.8 mm |
|
Wall Thickness |
1.2–5.0 mm |
|
Straight Length |
Up to 25 m |
|
Bend Radius |
According to Customer Drawing |
|
Leg Length |
Customized |
|
Heat Treatment |
Stress Relief Annealed After Bending (If Required) |
|
Tube Ends |
Plain Ends |
|
Surface Finish |
Clean, Oiled or Pickled |
|
Packaging |
Bundled with protective wrapping and packed in seaworthy plywood cases or wooden crates |
Chemical Composition
|
Element |
Content |
|---|---|
|
Carbon (C) |
0.06–0.18% |
|
Manganese (Mn) |
0.27–0.63% |
|
Phosphorus (P) |
≤0.035% |
|
Sulfur (S) |
≤0.035% |
Mechanical Properties
|
Property |
Value |
|---|---|
|
Tensile Strength |
≥325 MPa |
|
Yield Strength |
≥180 MPa |
|
Elongation |
≥35% |
|
Hardness |
≤72 HRB |
Product Features
Manufactured using a seamless cold-drawn process to provide accurate dimensions, smooth internal surfaces and consistent wall thickness for heat transfer equipment.
The seamless tube structure and uniform wall thickness support efficient heat exchange in condensers, heat exchangers and boilers.
U bending minimizes welding joints in tube bundles, helping simplify equipment assembly and reduce potential leakage points.
Suitable for bending, expanding, welding and tube sheet installation during heat exchanger manufacturing.
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
|
Parameter |
Range |
|---|---|
|
Outside Diameter |
12.7–50.8 mm |
|
Wall Thickness |
1.2–5.0 mm |
|
Leg Length |
Customized |
|
Bend Radius |
Customized |
|
Tube Length |
According to Drawing |
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
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.
U bend tubes reduce welding joints, simplify tube bundle fabrication and allow compact heat exchanger designs.
Stress relief heat treatment can be performed after bending when specified by project requirements or applicable standards.
Yes. Outside diameter, wall thickness, bend radius and leg length can all be manufactured according to customer drawings.
Hydrostatic testing, eddy current testing, ultrasonic testing, PMI, dimensional inspection and mechanical testing are available according to customer requirements.
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
