Stainless Steel U Bend Tube , ASTM A213 TP304/304L , TP316/316L , TP321/321H ,

Product Specification

Stainless Steel U Bend Tube , ASTM A213 TP304/304L , TP316/316L , TP321/321H , TP310/310S

U Bend Tube of stainless steel, Duplex Steel, Alloy Steel.  100% Hydro Test, Eddy Current Test . Ultraulic Test .

Stainless Steel U Bend Tube DIN 17458 EN 10216-5 , EN 10204-3.1B  1.4301, 1.4304, 1.4401

Stainless Steel U Bend Tube is a specialized type of stainless steel tubing that is bent into a U-shape. This configuration is commonly used in heat exchangers, condensers, boilers, and other equipment where efficient heat transfer and compact design are critical. These tubes are engineered to handle high-temperature and high-pressure environments, providing excellent corrosion resistance, mechanical strength, and durability.

The U-shaped configuration is ideal for heat exchangers, condensers, boilers, and other equipment requiring efficient heat transfer and compact design.They have efficient heat transfer capabilities, high-temperature performance, and long service life.

Grade	Material number	C	Si	Mn	P	S	N	Cr	Mo	Ni	Ti	others
Ferritic or martensitic steels
X2CrTi12	1.4512	0.030	1.00	1.00	0.040	0.015		10.50 to 12.50			6×(C+N) to 0.65
X6CrAl13	1.4002	0.08	1.00	1.00	0.040	0.015		12.00 to 14.00				0.10 to 0.30Al
X6Cr17	1.4016	0.08	1.00	1.00	0.040	0.015		16.00 to 18.00
X3CrTi17	1.4510	0.05	1.00	1.00	0.040	0.015		16.00 to 18.00			4×(C+N)+0.15 to 0.80
X12Cr13	1.4006	0.08 to 0.15	1.00	1.50	0.040	0.015		11.50 to 13.50		0.75
Austenitic steels
X5CrNi18-10	1.4301	0.07	1.00	2.00	0.045	0.015	0.11	17.00 to 19.50		8.00 to 10.50
X2CrNi19-11	1.4306	0.030	1.00	2.00	0.045	0.015	0.11	18.00 to 20.00		10.00 to 12.00
X2CrNiN18-10	1.4311	0.030	1.00	2.00	0.045	0.015	0.12 to 0.22	17.00 to 19.50		8.50 to 11.50
X6CrNiTi18-10	1.4541	0.08	1.00	2.00	0.045	0.015		17.00 to 19.00		9.00 to 12.00	5×C to 0.70
X6CrNiNb18-10	1.4550	0.08	1.00	2.00	0.045	0.015		17.00 to 19.00		9.00 to 12.00		10×C to 1.00Nb
X5CrNiMo17-12-2	1.4401	0.07	1.00	2.00	0.045	0.015	0.11	16.50 to 18.50	2.00 to 2.50	10.00 to 13.00
X2CrNiMo17-12-2	1.4404	0.030	1.00	2.00	0.045	0.015	0.11	16.50 to 18.50	2.00 to 2.50	10.00 to 13.00
X6CrNiMoTi17-12-2	1.4571	0.08	1.00	2.00	0.045	0.015		16.50 to 18.50	2.00 to 2.50	10.50 to 13.50	5×C to 0.70
X2CrNiMoN17-13-3	1.4429	0.030	1.00	2.00	0.045	0.015	0.12 to 0.22	16.50 to 18.50	2.50 to 3.00	11.00 to 14.00
X2CrNiMo18-14-3	1.4435	0.030	1.00	2.00	0.045	0.015	0.11	17.00 to 19.00	2.50 to 3.00	12.50 to 15.00
X3CrNiMo17-13-3	1.4436	0.05	1.00	2.00	0.045	0.015	0.11	16.50 to 18.50	2.50 to 3.00	10.50 to 13.00
X2CrNiMoN17-13-5	1.4439	0.030	1.00	2.00	0.045	0.015	0.12 to 0.22	16.50 to 18.50	4.00 to 5.00	12.50 to 14.50

U-Bend Tube are widely used in Heat Exchanger Systems. Heat-Exchanger Equipment on the basis of 

Seamless Stainless U-Tubes and Welded Stainless U bend Tube is essential in strategically important and 

critical felds---Nuclear And Petrochemical Machine Building.

YUHONG Group Start to Produce U Bending Tube Since 2006,Up to now already supply more than 

30000 tons Stainless Steel U Bend Tube to 35 countries.

The U-Bend Tube Comply With The Following Standards:

1.    ASTM A688/ASME SA688

2.    ASTM A803/ASME SA803

3.    ASTM A556/ASME SA556

Steel Grade:

Tube Of Other Alloys And Steel Grades Can Be Produced Upon Agreement.

Technical Requirements:

Straight Tubes Standard Specification For Bending:

ASME SA 213; ASME SB 163; ASME A789, ASME SA268, ASME SA269, etc.

Marking: Before Bending By Marking Machine All Over The Tube Length (Bent Section After Heat 

Treatment Without Marking)

Note: Marking is also possible After Bending On The Straight Parts Of U-Bending Tube.

U-Bend Tubes:

-TEMA RCB 2.31 Standard Of The Tubular Exchanger Manufacturers Association (9th Edition).

-ASTM A688/ASME SA688 Standard Specification For Welded Tubes Of Austenitic Corrosion Resistant 

Steel Grade Designed For Feed Water Boilers.

-ASTM B163/ASME SA163 Standard Techinical Requirements For Tubes Of Nickel And Nickel Alloy For 

Condensers And Heat Exchangers.

-Customer Specifications.

Bending Radius: From 1.5*OD(Outside Diameter) To 1500mm

When Ordering Tubes With Radius less or equal to 1.5*OD, It Is Necessary To Agree Precision Of Geometrics.

Straight Tubes Maximum Length:(Before Bending): 35000 mm.

Leg Length: Min 1 Meter, Max. 16500 mm (For Max R=1500mm)

Note: Other Size Are Available Upon Agreement.

Heat Treatment: Stress Relieved After U-Bending (Bending Area Plus 300MM For Each Leg).

Hydrostatic Test After U Bending: Maximum Test Pressure 600 Bar, Soaking 10 Sec. With 

Dematerialized Water. Compressed Air Cleaning After Hydro-Test.

Packaging: In Strong Transport-Worthy Pre-fumigated wooden boxes of corresponding dimensions for 

each tube Length, Radius, Diameter, According To PO requirements as well as wrapped In polyethylene 

films With soft plastic caps on both end of Tube.

Some of the quality tests carried out by us includes:

Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing.

The tests conducted under this include: