Stainless Steel U Bend Tube ASTM B163, ASME SB 163, ASME B677, EN10216-5 TC2 D4

Product Specification

 Stainless Steel U Bend Tube ASTM B163, ASME SB 163, ASME B677, EN10216-5 TC2 D4 , ASTM A789, A688 , A213.

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.
• Thereafter pickled, dried, marked and packed.
• All procedure is strictly followed as per TEMA "C" and ASTM A-688.

 
Stainless Steel U Bend Tube ASTM B163, ASME SA 213, ASME SB 163, EN10216-5 TC2 D4
 
 
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 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:

 
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: