A179 U Bend Dimension capability

Tube OD.: 12.7mm-38.1mm.
Tube Thickness: 1.25mm-6mm.
Bending Radius: Min.1.5 x OD/ Max. 1250mm.
U tube Straight “leg” Length: Max. 12500mm.
Straight tube before U bending: Max. 27000mm.

ASTM A179 U bend tubes are a key component in many industrial applications.

These tubes are engineered to precise specifications, ensuring their quality and performance. The U-bend design offers unique advantages in systems where space is limited or complex fluid flow paths are required.

Manufactured in accordance with the ASTM A179 standard, they exhibit excellent mechanical strength and durability. This enables them to withstand the rigors of various operating conditions, including high pressure and temperature variations.

The material composition of these U bend tubes provides resistance to corrosion and wear, prolonging their service life and reducing maintenance costs.

Whether used in heat exchangers, boilers, or other industrial equipment, ASTM A179 U bend tubes offer a reliable and efficient solution for fluid transfer and heat exchange.

ASTM A179 U-Bent tubes are widely used in Heat-exchangers applied mostly in oil and gas plants, chemical and petrochemical plants, refineries, power plants, and renewable energy plants. Low fin tubes can be supplied in the form of U bends.

ASTM A179 U-bend tubes are used in heat exchangers and boilers. They are made from seamless, cold-drawn low-carbon steel tubes. The tubes are used in oil and gas plants, chemical and petrochemical plants, refineries, power plants, and renewable energy plants.

The tubes have a wall thickness of 1.65–2.77 mm. The bending radius is from 1.5 times the outer diameter to 1250 mm.

ASTM A179 tubes are available in different specifications, including:

Wall thickness, Standards, Sizes, Lengths, Ends, Shapes, Types.
The chemical composition of ASTM A179 tubes includes carbon, manganese, phosphorus, and sulfur.

Bend ASTM A179 tubes

How to bend ASTM A179 tubes?

We bend ASTM A179 b bend tubes with round, rectangular, square, plus oval cross sections used in medical, automotive, plus electronics industries.

Material Preparation:

Inspection: Before bending, inspect the tubes for any defects or irregularities. Ensure they meet the ASTM A179 specifications.
Cleaning: Clean the tubes to remove any oil, dirt, or other contaminants that could affect the bending process.

Tool Selection:

Bending Machine: Use a suitable tube bending machine capable of handling the dimensions and material properties of ASTM A179 tubes.
Mandrels and Dies: Choose the right mandrels and dies that match the tube size and desired bend radius to prevent tube collapse and ensure smooth bends.

Heat Treatment (If Necessary):

Depending on the bend radius and tube thickness, heat treatment might be required to avoid cracking. ASTM A179 tubes typically have good ductility, but for tighter bends, localized heating may be beneficial.

Bending Process:

Cold Bending: For moderate bends, cold bending can be performed using the tube bending machine. Ensure slow and steady pressure is applied to avoid sudden deformation.
Hot Bending: For tighter or more complex bends, heating the tube to a specific temperature may be necessary. This can be done using induction heating or a furnace. After heating, the tube is bent on the bending machine.

Post-Bending Treatment:

Cooling: Allow the tubes to cool gradually to avoid introducing stresses. Avoid rapid cooling, which could lead to brittleness.
Heat Treatment (If Applied): If the tubes were heated during bending, they may need to be annealed or normalized to relieve stresses and restore mechanical properties.

Inspection and Testing:

Visual Inspection: Check for any surface defects, wrinkles, or cracks that may have occurred during bending.
Dimensional Check: Verify the dimensions and bend radius to ensure they meet the required specifications.
Non-Destructive Testing (NDT): Techniques such as ultrasonic testing or eddy current testing can be used to ensure the structural integrity of the bends.

Seamless Cold-Drawn Low Carbon Steel Tubes for Heat Exchangers and Condensers

Seamless cold-drawn low carbon steel tubes for use in heat exchangers and condensers" refers to tubes specifically designed for the manufacturing of heat exchangers and condensers. These tubes typically possess high strength, good toughness, and excellent thermal conductivity, making them suitable for transferring heat in such applications.

To bend ASTM A179 tubes, you will need specialized equipment and careful control of the bending process to ensure the tubes maintain their structural integrity. Here are the general steps involved in bending ASTM A179 tubes:

Prepare the equipment: Set up a tube bending machine specifically designed for bending tubes. Ensure that the machine is properly calibrated and in good working condition.
Select the appropriate bending tool: Choose a bending tool that matches the desired bend radius and angle for the ASTM A179 tubes. The tool should be compatible with the tube diameter and wall thickness.
Mark the bending points: Use a marker or scribe to mark the precise points on the tube where the bends will be made. This will help ensure accuracy during the bending process.
Secure the tube: Secure the ASTM A179 tube in the bending machine, making sure it is properly aligned with the bending tool.
Bend the tube: Activate the bending machine to gradually bend the tube to the desired angle and radius. The machine will apply force to the tube at the marked bending points, gradually shaping it into the desired U-shaped configuration.
Inspect the bend: After the bending process is complete, visually inspect the tube to ensure that the bend is smooth and free from any cracks or deformations.

What is ASTM A179?

ASTM A179 is a standard specification for seamless cold-drawn low-carbon steel tubes used in tubular heat exchangers, condensers, and similar applications.

The ASTM A179 tubes are produced through a cold-drawing process, which helps to improve their dimensional accuracy and surface finish.

Scope of ASTM A179 U bend tubes

ASTM A179 /ASME SA179 covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.
ASTM A179 /ASME SA179 covers tubes 1/8 to 3 in. [3.2 to 76.2 mm], inclusive, in outside diameter. Note 1Tubing smaller in outside diameter and having a thinner wall than indicated in this specification is available. Mechanical property requirements do not apply to tubing smaller than 1/8 in. [3.2 mm] in outside diameter or with a wall thickness under 0.015 in. [0.4 mm].
The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.

ASTM A179 U bend tubes and its usage

ASTM A179 U bend tubes are widely used in industries such as petroleum, chemical, medical, food, light industry, machinery, instrument, include industrial pipeline and mechanical structure parts, etc.

Pharmaceutical Equipment
Chemical Equipment
Sea Water Equipment
Heat Exchangers
Condensers
Pulp and Paper Industry

Off-Shore Oil Drilling Companies
Power Generation
Petrochemicals
Gas Processing
Specialty Chemicals
Pharmaceuticals

ASTM A179 Fin Tubes

ASTM A179 U bend tubes

What is ASTM A179 tube material?

ASTM A179 covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular, heat exchanger, condensers, and other heat transfer services. seamless ASTM A 179 steel tube is supplied and produced by cold drawning method. Chemical composition contains carbon, manganese, phosphorus, and sulfur.

Features of ASTM A179 U bend tubes

ASTMA179/ASME SA179 standard is applicable for steel pipes together with outside diameter of 1/8in-3in. (32 mm to 76.2 mm). Our rolling technology has reached the international advanced spot. JST is able to manufacture cold drawn seamless steel tubes with uniform wall depth. Their tolerance is relatively smaller standard your own.

When seamless carbon steel pipes are during the last cold drawing procedure, they will enter micro oxidization and non-oxidation heat treatment furnace for thermal treatment (Temperature is 1200℉ (650℃) if not more.). This makes the surface of cold drawn seamless steel tubes match the no oxide scale standards, and guarantees smooth surface and stable performance.

JST adopts professional hardness testing equipment to find out the hardness of seamless carbon steel pipes. The Rockwell hardness value not able to exceed 72 HRB.

Top rated program customers' requirements, we can analyze the cold drawn seamless steel tube advertise its chemical composition meet standards. We choose one from 250 pipes or select one in a furnace to investigate. If the product analysis fails, then choose another two seamless carbon steel pipes. All elements of two steel pipes tend to be in accordance with standards, and then these pipes can be delivered.

Note:

Mill test certificates will be issued according to EN10204.3
All tubes shall be supplied as per applicable ASTM Specification.
The tubes Shall be Seamless and the testing shall be as per A 450 / A450M.

Size Specifications of ASTM A179 U bend tubes

OD(mm)	Wall Thickness Unit(mm)
OD(mm)	2	2.5	3	3.5	4	4.5	5	6	6.5 - 7	7.5 - 8	8.5 - 9	9.5 - 10	11	12
Φ25-Φ28	●	●	●	●	●	●
Φ32		●	●	●	●	●	●
Φ34-Φ36		●	●	●	●	●	●
Φ38		●	●	●	●	●	●
Φ40			●	●	●	●	●
Φ42			●	●	●	●	●
Φ45			●	●	●	●	●	●
Φ48-Φ60			●	●	●	●	●	●	●
Φ63.5				●	●	●	●	●	●	●
Φ68-Φ73					●	●	●	●	●	●
Φ76					●	●	●	●	●	●	●	●	●	●
Φ80					●	●	●	●	●	●	●	●	●	●
Φ83					●	●	●	●	●	●	●	●	●	●
Φ89					●	●	●	●	●	●	●	●	●	●
Φ95					●	●	●	●	●	●	●	●	●	●
Φ102					●	●	●	●	●	●	●	●	●	●
Φ108					●	●	●	●	●	●	●	●	●	●
Φ114						●	●	●	●	●	●	●	●	●
Φ121						●	●	●	●	●	●	●	●	●
Φ127						●	●	●	●	●	●	●	●	●
Φ133						●	●	●	●	●	●	●	●	●
Φ140							●	●	●	●	●	●	●	●
Φ146							●	●	●	●	●	●	●	●
Φ152							●	●	●	●	●	●	●	●
Φ159							●	●	●	●	●	●	●	●
Φ168							●	●	●	●	●	●	●	●

Chemical Components (%) of ASTM A179 U bend tubes

C	Si	Mn	P	S	Mo	Cr	V
0.06-0.18	/	0.27-0.63	≤0.035	≤0.035	/	/	/

Mechanical Properties of ASTM A179 U bend tubes

Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)	Hardness (HRB)
≥325	≥180	≥35	≤72

A450/A450M

ASTM A450 covers carbon and low alloy steel tube. Steel samples shall be melt processed and shall either be ingot cast or strand cast. Heat and product analyses shall be performed on the steel materials. Steel specimens shall also undergo tensile tests and shall conform to required values of yield strength and elongation. Flattening test, reverse flattening test, flaring test, flange test, hardness test, hydrostatic test, air underwater pressure test, and nondestructive tests shall be performed on the steel materials.

OD In (mm)	+	-	WT In(mm)	+	-
<1(25.4)	0.10	0.10	≤1.1/2(38.1)	20%	0
11.1/2(25.438.1)	0.15	0.15	>1.1/2(38.1)	22%	0
>1.1/2<2(38.150.8)	0.20	0.20
2<2.1/2(50.863.5)	0.25	0.25
2.1/2<3(63.576.2)	0.30	0.30
34(76.2101.6)	0.38	0.38
>47.1/2(101.6190.5)	0.38	0.64
>7.1/29(190.5228.6)	0.38	1.14