ASME SA789 SMLS UNS S32205 Duplex Steel Bend U Boiler Tubes

 
ASME SA789 SMLS UNS S32205 Duplex Steel Bend U Boiler Tubes
 
YuHong Group can offer SA789/A789 UNS S32205 duplex steel bend U tubes and we sell these products with highest quality in more than 70 countries.
 
ASME SA789 / ASTM A789 This specification covers grades of nominal wall thickness, stainless steel tubing for services requiring general corrosion resistance, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if used for prolonged periods at elevated temperatures.

Specifications

U tubes are made by bending straight tubes and bending is done cold on an automatic U-bend. For ensuring tube wall thinning and diameter ovality are controlled, tube bending is accomplished with a mandrel inserted into the tube. Besides, the U-bend of the U-tube is stress relieved under controlled conditions and cycles for extended life.

Duplex stainless steels are called “duplex” because they have a two-phase microstructure consisting of grains of ferritic and austenitic stainless steel.Whilst duplex stainless steel are considered resistant to stress corrosion cracking, they are not as resistant to this form of attack as ferritic stainless steel. Duplex stainless steel are also magnetic, a property that can be used to easily differentiate them from common austenitic grades of stainless.Duplex S32205 stainless steel is used extensively in applications that require good corrosion resistance and strength.It is also used extensively in applications that require good corrosion resistance and strength.

Test Required Bend U tube
 

Corrosion Test

Chemical Analysis

Reverse-bend and Re. flat tests

Eddy Current Testing

Hydrostatic Testing

Visual Inspection

Mechanical Tests: Tension test, Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test

Chemical Composition  UNS S32205
 

Mechanical Property 
 

 
Applications Industry

Pharmaceutical Equipment

Power Generation

Petrochemicals

Pressure Vessel

Heat Exchangers / Condensers / Boiler

Oil and Gas Processing

Specialty Chemicals

General Engineering

Pulp and Paper Industry