Duplex Pipes & Tubes

Duplex 2205 is a nitrogen enhanced duplex stainless steel that was developed to combat common corrosion problems encountered with the 300 series stainless steels. “Duplex” describes a family of stainless steels that are neither fully austenitic, like 304 stainless, nor purely ferritic, like 430 stainless. The structure of 2205 duplex stainless steel consists of austenite pools surrounded by a continuous ferrite phase. In the annealed condition, 2205 contains approximately 40-50% ferrite. Often referred to as the work horse grade, 2205 is the most widely used grade in the duplex family of stainless steels.

The advantage of a duplex structure is that it combines the favorable qualities of a ferritic alloy (stress corrosion cracking resistance and high strength) with those of an austenitic alloy (ease of fabrication and corrosion resistance).

Usage of 2205 Duplex stainless steel should be limited to temperatures below 600° F.  Extended elevated temperature exposure can embrittle 2205 stainless.

 

Forms of Duplex 2205

Sheet, Plate, Bar, Pipe & Tube (welded & seamless), Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples), Welding Wire and Welding Electrode

 

Corrosion Resistance

2205 duplex stainless steel is a cost effective solution for many applications where the 300 series stainless steels are susceptible to chloride stress corrosion cracking. Stress corrosion cracking occurs when stainless steels are subjected to tensile stress, while in contact with solutions containing chlorides. Increasing temperatures also increase the susceptibility of stainless steels to stress corrosion cracking.

The combination of chromium, molybdenum and nitrogen convey the good resistance of 2205 to chloride pitting and crevice corrosion. This resistance is extremely important for services such as marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. The high chromium, molybdenum and nitrogen contents of 2205 provide corrosion resistance superior to common stainless steels, such as, 316L and 317L in most environments.

 

Applications for Duplex 2205

  • Chemical process vessels, piping and heat exchangers
  • Pulp mill digesters, bleach washers, chip pre-steaming vessels
  • Food processing equipment
  • Oil field piping and heat exchangers
  • Flue gas desulfurization equipment

Standard for Duplex

Alloy Designation
UNS
BS
EN
Basic
DIN
JIS
Trade Name
ASTM
Alloy 2205 S31803   1.4462 22Cr-5Ni-3Mo-0.15N X2CrNiMoN22-5-3 SUS329L3L (JIS G3463) SAF 2205 22Cr  
Alloy 2205 S32205   1.4462 22.5Cr-6Ni-3Mo-0.2N     SAF 2205 22Cr A789

 

RELIABLE PIPES AND TUBES is one of the largest stockists, manufacturer, distributor, trader od following items:

 

ASTM A790 UNS31200 Seamless Pipe ASTM A790 UNS31260 Seamless Pipe ASTM A790 UNS31500 Seamless Pipe
ASTM A790 UNS31200 Welded Pipe ASTM A790 UNS31260 Welded Pipe ASTM A790 UNS31500 Welded Pipe
ASTM A790 UNS31200 ERW Pipe ASTM A790 UNS31260 ERW Pipe ASTM A790 UNS31500 ERW Pipe
ASTM A790 UNS31200 SAW Pipe ASTM A790 UNS31260 SAW Pipe ASTM A790 UNS31500 SAW Pipe
ASTM A790 UNS31200 HFW Pipe ASTM A790 UNS31260 HFW Pipe ASTM A790 UNS31500 HFW Pipe
ASTM A790 UNS31200 LSAW Pipe ASTM A790 UNS31260 LSAW Pipe ASTM A790 UNS31500 LSAW Pipe
ASTM A790 UNS31200 DSAW Pipe ASTM A790 UNS31260 DSAW Pipe ASTM A790 UNS31500 DSAW Pipe
ASTM A790 UNS31200 HSAW Pipe ASTM A790 UNS31260 HSAW Pipe ASTM A790 UNS31500 HSAW Pipe
ASTM A790 UNS31803 Seamless Pipe ASTM A790 UNS32003 Seamless Pipe ASTM A790 UNS32101 Seamless Pipe
ASTM A790 UNS31803 Welded Pipe ASTM A790 UNS32003 Welded Pipe ASTM A790 UNS32101 Welded Pipe
ASTM A790 UNS31803 ERW Pipe ASTM A790 UNS32003 ERW Pipe ASTM A790 UNS32101 ERW Pipe
ASTM A790 UNS31803 SAW Pipe ASTM A790 UNS32003 SAW Pipe ASTM A790 UNS32101 SAW Pipe
ASTM A790 UNS31803 HFW Pipe ASTM A790 UNS32003 HFW Pipe ASTM A790 UNS32101 HFW Pipe
ASTM A790 UNS31803 LSAW Pipe ASTM A790 UNS32003 LSAW Pipe ASTM A790 UNS32101 LSAW Pipe
ASTM A790 UNS31803 DSAW Pipe ASTM A790 UNS32003 DSAW Pipe ASTM A790 UNS32101 DSAW Pipe
ASTM A790 UNS31803 HSAW Pipe ASTM A790 UNS32003 HSAW Pipe ASTM A790 UNS32101 HSAW Pipe
ASTM A790 UNS32202 Seamless Pipe ASTM A790 UNS32205 Seamless Pipe ASTM A790 UNS32304 Seamless Pipe
ASTM A790 UNS32202 Welded Pipe ASTM A790 UNS32205 Welded Pipe ASTM A790 UNS32304 Welded Pipe
ASTM A790 UNS32202 ERW Pipe ASTM A790 UNS32205 ERW Pipe ASTM A790 UNS32304 ERW Pipe
ASTM A790 UNS32202 SAW Pipe ASTM A790 UNS32205 SAW Pipe ASTM A790 UNS32304 SAW Pipe
ASTM A790 UNS32202 HFW Pipe ASTM A790 UNS32205 HFW Pipe ASTM A790 UNS32304 HFW Pipe
ASTM A790 UNS32202 LSAW Pipe ASTM A790 UNS32205 LSAW Pipe ASTM A790 UNS32304 LSAW Pipe
ASTM A790 UNS32202 DSAW Pipe ASTM A790 UNS32205 DSAW Pipe ASTM A790 UNS32304 DSAW Pipe
ASTM A790 UNS32202 HSAW Pipe ASTM A790 UNS32205 HSAW Pipe ASTM A790 UNS32304 HSAW Pipe
ASTM A790 UNS32506 Seamless Pipe ASTM A790 UNS32520 Seamless Pipe ASTM A790 UNS32550 Seamless Pipe
ASTM A790 UNS32506 Welded Pipe ASTM A790 UNS32520 Welded Pipe ASTM A790 UNS32550 Welded Pipe
ASTM A790 UNS32506 ERW Pipe ASTM A790 UNS32520 ERW Pipe ASTM A790 UNS32550 ERW Pipe
ASTM A790 UNS32506 SAW Pipe ASTM A790 UNS32520 SAW Pipe ASTM A790 UNS32550 SAW Pipe
ASTM A790 UNS32506 HFW Pipe ASTM A790 UNS32520 HFW Pipe ASTM A790 UNS32550 HFW Pipe
ASTM A790 UNS32506 LSAW Pipe ASTM A790 UNS32520 LSAW Pipe ASTM A790 UNS32550 LSAW Pipe
ASTM A790 UNS32506 DSAW Pipe ASTM A790 UNS32520 DSAW Pipe ASTM A790 UNS32550 DSAW Pipe
ASTM A790 UNS32506 HSAW Pipe ASTM A790 UNS32520 HSAW Pipe ASTM A790 UNS32550 HSAW Pipe
ASTM A790 UNS32707 Seamless Pipe ASTM A790 UNS32750 Seamless Pipe ASTM A790 UNS32760 Seamless Pipe
ASTM A790 UNS32707 Welded Pipe ASTM A790 UNS32750 Welded Pipe ASTM A790 UNS32760 Welded Pipe
ASTM A790 UNS32707 ERW Pipe ASTM A790 UNS32750 ERW Pipe ASTM A790 UNS32760 ERW Pipe
ASTM A790 UNS32707 SAW Pipe ASTM A790 UNS32750 SAW Pipe ASTM A790 UNS32760 SAW Pipe
ASTM A790 UNS32707 HFW Pipe ASTM A790 UNS32750 HFW Pipe ASTM A790 UNS32760 HFW Pipe
ASTM A790 UNS32707 LSAW Pipe ASTM A790 UNS32750 LSAW Pipe ASTM A790 UNS32760 LSAW Pipe
ASTM A790 UNS32707 DSAW Pipe ASTM A790 UNS32750 DSAW Pipe ASTM A790 UNS32760 DSAW Pipe
ASTM A790 UNS32707 HSAW Pipe ASTM A790 UNS32750 HSAW Pipe ASTM A790 UNS32760 HSAW Pipe
ASTM A790 UNS32808 Seamless Pipe ASTM A790 UNS32900 Seamless Pipe ASTM A790 UNS32906 Seamless Pipe
ASTM A790 UNS32808 Welded Pipe ASTM A790 UNS32900 Welded Pipe ASTM A790 UNS32906 Welded Pipe
ASTM A790 UNS32808 ERW Pipe ASTM A790 UNS32900 ERW Pipe ASTM A790 UNS32906 ERW Pipe
ASTM A790 UNS32808 SAW Pipe ASTM A790 UNS32900 SAW Pipe ASTM A790 UNS32906 SAW Pipe
ASTM A790 UNS32808 HFW Pipe ASTM A790 UNS32900 HFW Pipe ASTM A790 UNS32906 HFW Pipe
ASTM A790 UNS32808 LSAW Pipe ASTM A790 UNS32900 LSAW Pipe ASTM A790 UNS32906 LSAW Pipe
ASTM A790 UNS32808 DSAW Pipe ASTM A790 UNS32900 DSAW Pipe ASTM A790 UNS32906 DSAW Pipe
ASTM A790 UNS32808 HSAW Pipe ASTM A790 UNS32900 HSAW Pipe ASTM A790 UNS32906 HSAW Pipe
ASTM A790 UNS32950 Seamless Pipe ASTM A790 UNS33207 Seamless Pipe ASTM A790 UNS39274 Seamless Pipe
ASTM A790 UNS32950 Welded Pipe ASTM A790 UNS33207 Welded Pipe ASTM A790 UNS39274 Welded Pipe
ASTM A790 UNS32950 ERW Pipe ASTM A790 UNS33207 ERW Pipe ASTM A790 UNS39274 ERW Pipe
ASTM A790 UNS32950 SAW Pipe ASTM A790 UNS33207 SAW Pipe ASTM A790 UNS39274 SAW Pipe
ASTM A790 UNS32950 HFW Pipe ASTM A790 UNS33207 HFW Pipe ASTM A790 UNS39274 HFW Pipe
ASTM A790 UNS32950 LSAW Pipe ASTM A790 UNS33207 LSAW Pipe ASTM A790 UNS39274 LSAW Pipe
ASTM A790 UNS32950 DSAW Pipe ASTM A790 UNS33207 DSAW Pipe ASTM A790 UNS39274 DSAW Pipe
ASTM A790 UNS32950 HSAW Pipe ASTM A790 UNS33207 HSAW Pipe ASTM A790 UNS39274 HSAW Pipe
ASTM A790 UNS39277 Seamless Pipe ASTM A790 UNS81921 Seamless Pipe ASTM A790 UNS82011 Seamless Pipe
ASTM A790 UNS39277 Welded Pipe ASTM A790 UNS81921 Welded Pipe ASTM A790 UNS82011 Welded Pipe
ASTM A790 UNS39277 ERW Pipe ASTM A790 UNS81921 ERW Pipe ASTM A790 UNS82011 ERW Pipe
ASTM A790 UNS39277 SAW Pipe ASTM A790 UNS81921 SAW Pipe ASTM A790 UNS82011 SAW Pipe
ASTM A790 UNS39277 HFW Pipe ASTM A790 UNS81921 HFW Pipe ASTM A790 UNS82011 HFW Pipe
ASTM A790 UNS39277 LSAW Pipe ASTM A790 UNS81921 LSAW Pipe ASTM A790 UNS82011 LSAW Pipe
ASTM A790 UNS39277 DSAW Pipe ASTM A790 UNS81921 DSAW Pipe ASTM A790 UNS82011 DSAW Pipe
ASTM A790 UNS39277 HSAW Pipe ASTM A790 UNS81921 HSAW Pipe ASTM A790 UNS82011 HSAW Pipe
ASTM A790 UNS82121 Seamless Pipe ASTM A790 UNS82441 Seamless Pipe ASTM A790 UNS82121 Welded Pipe
ASTM A790 UNS82121 ERW Pipe ASTM A790 UNS82441 Welded Pipe ASTM A790 UNS82441 SAW Pipe
ASTM A790 UNS82121 SAW Pipe ASTM A790 UNS82441 ERW Pipe ASTM A790 UNS82441 HFW Pipe
ASTM A790 UNS82121 HFW Pipe ASTM A790 UNS82441 LSAW Pipe ASTM A790 UNS82121 DSAW Pipe
ASTM A790 UNS82121 LSAW Pipe ASTM A790 UNS82441 DSAW Pipe ASTM A790 UNS82121 HSAW Pipe
ASTM A790 UNS82441 HSAW Pipe