Company Details

  • YUHONG GROUP CO.,LIMITED

  •  [Zhejiang,China]
  • Business Type:Manufacturer , Service
  • Main Mark: Africa , Americas , Asia , Middle East , Oceania , Worldwide , East Europe , Europe , West Europe
  • Exporter:61% - 70%
  • Certs:GB, API, ASME, CE, GS, Test Report, TUV
  • Description:SA789 S31500 U Bend Tube,S31500 Heat Exchanger U Tube,A789 UNS S31500 U Bend Tube
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YUHONG GROUP CO.,LIMITED

SA789 S31500 U Bend Tube,S31500 Heat Exchanger U Tube,A789 UNS S31500 U Bend Tube

Home > Products > Heat Exchange Tube > U Bend Heat Exchanger Tube > Duplex Steel U Bend Tube ASME SA789 S31500
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Duplex Steel U Bend Tube ASME SA789 S31500

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    Payment Type: L/C,T/T,D/P,Western Union
    Incoterm: FOB,CFR,CIF,EXW
    Min. Order: 1 Long Ton

Basic Info

Model No.: U Bend Tube

Type: Seamless

Application: Boiler Pipe

Section Shape: Round

Usage: Thermal Equipment

Technique: Cold Rolled

Material: Stainless Steel

Additional Info

Packaging: Plywood Case Packing

Productivity: 800 Tons Per Month

Brand: YUHONG

Transportation: Ocean,Air

Place of Origin: China, USA, Korea, UE

Product Description

Duplex Stainless Steel U bend Tube ASME SA789 UNS S31500 is 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 deal with Austenitic Stainless Steel, Nickel Alloy Steel(Hastelloy , Monel, Inconel, Incoloy ) seamless and welded pipe and tube already more than 25 years, every year sell more than 80000 tons of steel pipe and tube. Our client already cover more than 45 countries, Like Italy, UK, Gernmany, USA, Canada, Chile, Colombia, Saudi Arabia, Russia, Korea, Singapore, Austrial, Poland, France , ....And our group branch company and factory have been already approved by :ABS, DNV, GL, BV, PED 97/23/EC, AD2000-WO, GOST9941-81, CCS, TS, CNNC, ISO9001-2008, ISO 14001-2004.


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.


USA AMS SA-789/SA-789M SA-789 S31500 Specification for Seamless and Welded Ferritic /Austenitic Stainless Steel Tubing for General Service and Mechanical Properties,

Chemical Element, Cross Reference, Datasheet.

UNS S31500 description:

UNS S31500 is a kind of seamless Duplex Stainless Steel Pipe/tube. S31500 is in the American standard .UNS S31500 seamless alloy steel pipe Process is Cold finished or hot finished.

UNS S31500 Chemical composition as below sheet.

grade C Mn Si S P Cr Ni Mo
S31500 0.03 1.30~2.00 0.8 0.030 0.035 18.00~ 19.50 4.50~5.50 2.50~3.0


UNS S31500 Mechanical properties:

Tensile strength ≥590 MPa
Yield strength ≥390 MPa
Elongation A(%)≥20


UNS S31500 application:

UNS S31500 duplex stainless steel has the ferrite to austenite size bipolar organization, good resistance to stress corrosion cracking, pitting corrosion resistance and 00 cr17ni13mo2 quite, has the high strength suitable for the environment of chlorine ion, used in fertilizer, paper making, petroleum, chemical industry and other industrial heat exchanger, condenser, etc.


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.

Duplex Stainless Steel U Bend Tube , ASTM A789 S31803 (SAF2205), ASTM A789 S32750 (SAF2507), S32760

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:

Corrosion Test Conducted only when specially requested by the client
Chemical Analysis Test done as per required quality standards
Destructive / Mechanical Testing Tensile | Hardness | Flattening | Flare | Flange
Reverse-bend and Re. flat tests Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end
Eddy Current Testing Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System
Hydrostatic Testing 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s .
Air Under Pressure Test To check any evidence of air leakage
Visual Inspection After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections


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

  • Eddy Current Testing
  • O.P Testing
  • Radiography Testing
  • Corrosion Testing
  • Micro Testing
  • Macro Testing
  • IGC Testing
  • Ultrasonic testing
  • Liquid Penetrate testing

Looking for ideal SA789 S31500 U Bend Tube Manufacturer & supplier ? We have a wide selection at great prices to help you get creative. All the S31500 Heat Exchanger U Tube are quality guaranteed. We are China Origin Factory of A789 UNS S31500 U Bend Tube. If you have any question, please feel free to contact us.

Product Categories : Heat Exchange Tube > U Bend Heat Exchanger Tube

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