Products Description
The ASTM A179 / ASME SA179 Seamless Tubes has similar grades and standards like ASTM A179/ A179M. It is viable in types like seamless / cold drawn / hot drawn etc. This tube product is available in custom-made size, diameter, and thickness.
This specification covers minimum wall thickness cold drawn low carbon seamless steel tubes for tubular heat exchangers, condensers and similar heat transfer equipment.
ASTM A179/ASME SA179 U Bend Heat Exchanger Tubes Quick Details
Manufacture:Seamless process ,cold drawn.
Bending Details: According to Bending Drawings.
Wall thickness(WT): 1.65 mm--2.77 mm.
Outer diameter (OD): 19.05mm - 38.1mm
Length: 6M or specified length as required, the longest is 26 meters.
Ends: Plain End
Additional Info
Port of Shipment: Henan, China
Payment Terms:T/T, LC
Delivery: 7-15 days after payment
Surface: Tubes will be varnished to prevent rust.
Marking: Standard + Steel Grade + Size + Heat No + Lot No
Package: Wooden Boxes,Crates (steel/wooden) or as required
Standard Specification
ASTM A179/A179M U-bent tube Chemical Compositions
| ASTM A179/A179M Chemical Components (%) | |||||||
| C | Si | Mn | P | S | Mo | Cr | V |
| 0.06-0.18 | / | 0.27-0.63 | ≤0.035 | ≤0.035 | / | / | / |
ASTM A179/A179M U-bent tube Mechanical Properties
| ASTM A179/A179M Mechanical properties | |||
| Tensile Strength (Mpa) |
Yield Strength (Mpa) |
Elongation (%) |
Hardness (HRB) |
| ≥325 | ≥180 | ≥35 | ≤72 |
ASTM A179/A179M U-bent tube Wall Thickness Tolerance
| ASTM A179/A179M Seamless, Cold-Finished Tubes | ||
| Outside Diameter In. (mm) |
Wall thickness Tolerance % | |
| Over (+) | Under (-) | |
| 1 ½ (38.1) and under |
20 | 0 |
| Over 1½ (38.1) | 22 | 0 |
ASTM A179/A179M U-bent tube Outside Diameter Tolerance
| ASTM A179/A179M Cold-Finished Seamless Tubes | ||
| Outside Diameter In. (mm) |
Permissible Variations In. (mm) | |
| Over (+) | Under (-) | |
| Under 1 (25.4) | 0.004 (0.1) | 0.004 (0.1) |
| 1 to 1 ½ (25.4 to 38.1), Incl | 0.006 (0.15) | 0.006 (0.15) |
| Over 11⁄2 to 2 [38.1 to 50.8], Excl | 0.008 (0.2) | 0.008 (0.2) |
| 2 to 21⁄2 [50.8 to 63.5], Excl | 0.010 (0.25) | 0.010 (0.25) |
| 21⁄2 to 3 [63.5 to 76.2], Excl | 0.012 (0.3) | 0.012 (0.3) |
ASTM A179/A179M Cut Length Tolerance
| ASTM A179/A179M Cold-Finished Seamless Tubes | ||
| Outside Diameter | Cut Length, in.(mm) | |
| In.(mm) | Over (+) | Under (-) |
| All Sizes | 3⁄16 [5] | 0 [0] |
| Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
| 2 [50.8] and over | 3⁄16 [5] | 0 [0] |
| Under 2 [50.8] | 1⁄8 [3] | 0 [0] |
| 2 [50.8] and over | 3⁄16 [5] | 0 [0] |
| These permissible variations in length apply to tubes before bending. They apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m], the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser. | ||
ASTM A179/A179M U-bent tube Hydrostatic Test Pressures
| ASTM A179/A179M Hydrostatic Test Pressures | |
| Outside Diameter of Tube, in. [mm] | Hydrostatic Test Pressure, psi [Mpa] |
| Under 1 [25.4] | 1000 [7] |
| 1 to 11⁄2 [25.4 to 38.1], excl | 1500 [10] |
| 11⁄2 to 2 [38.1 to 50.8], excl | 2000 [14] |
| 2 to 3 [50.8 to 76.2], excl | 2500 [17] |
ASTM A179/A179M U-bent tube sizes (u-bending, u-bend)
| Tube Outside Diameter | Tube Wall Thickness | Bending Radius | U Tube Straight "Leg" Length | Straight Tube Before U Bending |
| min. 12,70 mm | min. 0,70 mm | min. 1,5 x D | max. 11 000 mm | max. 24 000 mm |
| max. 31,75 mm | max 5,16 mm | max. 1 250 mm |
Technical Parameters
Outer diameter: 12.7-38 mm
The bending radius is from 1.5 times the outer diameter to 1250 mm. The outer diameter is over 28mm,
The minimum bend radius can be further discussed.
Straight pipe length is the shortest 1000mm
Straight pipe length up to 12000mm
The bending radius is below 1000mm and heat treatment is required.
Bent pipe technology standard
Technical Standard 7-2-1179
DIN 2879, TEMA RCB 2.31
Can be specified according to customer requirements. Can also follow some general techniques
Specifications.
Heat treatment
If requested by the customer, we add a straight pipe section with a minimum of 150mm according to the elbow.
Heat treatment is performed.
The computer controls the heat treatment furnace and records all the data.
The tube is filled with a protective gas - argon.
Annealing Status:
|
Annealing |
||
| Solution annealing | Stress relief annealing | Stabilized annealing |
Hydrostatictest
All U-tubes are subjected to a hydrostatic test after heat treatment.
The test time is not less than 5 seconds at the set pressure.
All tubes were blown dry and carefully cleaned after the test.
Measuring, cutting, deburring, cleaning
Accurately measure U-tubes according to relevant standards or customer requirements.
All pipes should be cut to length, deburred, and air dried to the inner wall.
Seal the ends with a plastic cap before packing.
A179/SA179 U tube in stock
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