U-bend seamless tubes

U-bend seamless tubes

EN 10204, heat exchangers, heater tubes, Seamless tube, seamless tubes, U bend tube, U bend tubes

Each U bend tube of our range is rigorously quality checked by our team of talented professionals on every stage of production to deliver the clients defect free best quality products. These U bend tubes can be custom designed in various diameters as per the requirements of our clients.

Available in different specifications, these U bend tubes can be custom designed in various diameters as per the requirements of our clients.
Application:

• Boilers, heat exchangers, super heaters, condensers

Production Standard, Grade, Steel No:

• ASTM A688/A688M-Welded Austentic Steel Feedwater Heater Tubes.
• ASTM A 312/213/269,DIN 17458/2462,BS3605/1,JIS, ASME SA556 G3429/3459,ISO1129/2037/9329,GB/T14975/14976/13296 and so on.

Material:

• TP304,TP304L,TP316,TP316L,TP321,TP310S,TP347H,TP316Ti,
• Carbon steel
• alloys and so on.

Proces:

• The removal of beads is done as per standard specifications.
• Bead is cold worked.
• It is brought in level with the base metal.

Before heat treatment on tube mill, bead rolling is made in-line.
This will help in recrystallization of weld structure.
The weld structure will also homogenize faster in annealing process.
Length: unbending length or fix length
Mill test certificate: according to EN 10204 3.2
Packing: Wooden cases, bundle or plastic bags, plywood boxes
Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting.

Features :

• U bending is done by cold working process.
• U bending is done to the required radius as per customer drawings.
• The bend portion and six inch leg is stress relieved by resistance heating.
• Inert gas (Argon) is passed through it at the required flow rate to avoid oxidation in ID.
• The radius is checked for its OD and wall thinning with the recommended specification.
• The physical properties and micro-structure is checked at three different position.
• Visual inspection for waviness and cracks is done with Dye Penetrant Test.
• Each tube is then hydro tested at the recommended pressure to check for leakage.
• Cotton ball test is done to check the ID cleanliness of the tube.

ASME SA179 steel tubing

ASTM A179, ASME SA179 steel tubing

ASTM A179, ASME SA179 steel tubing

astm a179, ASTM A179 tubing, heat exchangers, Steel pipe

ASTM A179/A179M,  ASME SA179/SA179M is the standard applicable to Seamless cold drawn low carbon steel heat exchanger and condenser tubes.

ASTM A179 covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. Tubes shall be made by the seamless process and shall be cold drawn. Heat and product analysis shall be performed wherein steel materials shall conform to required chemical compositions of carbon, manganese, phosphorus, and sulfur. The steel materials shall also undergo hardness test, flattening test, flaring test, flange test, and hydrostatic test.

ASTM A179 is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

General scope of ASTM A179

1.ASTM A179 covers minimum-wall-thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus.
2.ASTM A179 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].
3.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.

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.

Application: apply to the heat exchangers, condensers and heat transfer equipment and similar pipe.

Packing:

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles.

ASTM A179 tubing Chemical Compositions(%)

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

ASTM A179 tubing  Mechanical Properties

Yield Strength (Mpa)	Tensile Strength (Mpa)	Elongation (%)
≥180	≥325	≥35