Product Specification

ASTM A179 ASME SA179 Carbon Steel Seamless U Tube for Heat Exchanger and Condenser

Product Overview

ASTM A179 / ASME SA179 carbon steel seamless U tube is manufactured from low carbon steel seamless tube and processed through precision U bending for shell and tube heat exchanger applications.

The U tube configuration allows thermal expansion compensation within heat exchanger tube bundles, making it commonly used in U-tube heat exchangers, condensers, and boiler feed water heaters.

Manufactured according to ASTM A179 / ASME SA179 requirements, these tubes are produced with controlled chemical composition, mechanical properties, dimensional tolerances, and surface conditions.

Material and Standard

A179 Low Carbon Steel Seamless U Tube

Standard: ASTM A179 / ASME SA179
Material Grade: A179
Material Type: Low Carbon Steel
Tube Type: Seamless U Tube
Manufacturing Process: Cold Drawn Seamless Tube + U Bending

ASTM A179 specifies seamless cold-drawn low carbon steel tubes used for tubular heat exchangers, condensers, and similar heat transfer equipment.

Manufacturing Process

Seamless Tube Production

Raw carbon steel billets are processed into seamless tubes through controlled manufacturing procedures.

Cold Drawing

Cold drawing is applied to achieve:

• Controlled outside diameter
• Accurate wall thickness
• Improved surface quality

U Bending Process

Straight seamless tubes are bent into U shapes according to heat exchanger design requirements.

Key parameters include:

• Tube bending radius
• Straight length
• U bend diameter
• Leg length

Heat Treatment and Inspection

After bending, tubes undergo required processes including:

• Stress relieving (when specified)
• Cleaning
• Dimensional inspection
• Non-destructive testing

Technical Features

Seamless Tube Structure

The seamless construction provides uniform tube geometry without longitudinal weld seams.

U Tube Design

The U-shaped configuration allows tube bundle installation in heat exchangers where thermal expansion needs to be accommodated.

Customized Bending

U tubes can be manufactured according to:

• Heat exchanger drawings
• TEMA requirements
• Customer specifications

Product Specifications

Available Dimensions

Applications

Shell and Tube Heat Exchanger

ASTM A179 U tubes are commonly used in:

• U-tube heat exchangers
• Process heat exchangers
• Industrial cooling equipment

Condenser Equipment

Applications include:

• Power plant condensers
• Surface condensers
• Cooling systems

Boiler Equipment

Used in:

• Boiler feed water heaters
• Thermal power equipment
• Heat recovery systems

Oil Refinery and Chemical Plants

Suitable for:

• Refinery heat exchangers
• Chemical processing equipment
• Industrial thermal systems

Quality Control and Inspection

Inspection procedures may include:

Material Testing

• Chemical composition analysis
• Mechanical property testing

Dimensional Inspection

• Outside diameter measurement
• Wall thickness inspection
• Tube length verification
• Bend radius inspection

Non-Destructive Testing

• Eddy Current Testing (ET)
• Ultrasonic Testing (UT)
• Hydrostatic Testing

Inspection requirements can be adjusted according to project specifications.

Packaging

ASTM A179 / ASME SA179 U tubes are packaged according to export transportation requirements.

Packaging methods:

• Tube bundles
• Protective wrapping
• Wooden cases
• Steel frame packaging

Tube marking may include:

• Standard designation
• Material grade
• Size information
• Heat number