Applications The common application fields are:

• heat exchangers (condensers, evaporators, sea water desalinators)
• chemical and petrochemical industries
• food processing and refrigeration industries

Technical Specifications

U-bent tubes are manufactured according to the technical specifications requested by customers:
 

• Outside diameter of the tube: 6 ÷ 90 mm.
• Maximum overall length: > 26 m.
• Bending radius (min.): 1,5 × tube diameter.
• Bending radius (max.): 1200 mm.
• Heat treatment (by Joule effect on bent area) in inner and outer inert atmosphere.
• Anti oxidation surface treatment (with protective oils).
• Trimming and deburring of the ends.
• Internal cleaning and caps insertion.
• Packing in custom racks.

 
Stainless Steel U Bend Tube ASME B163 B677 N8904 / 904L Pickled and Annealed & Plain End
 
 
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 
YUHONG SPECIAL STEEL 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:&nbs