2205/2207 Duplex Stainless Steel Welded Pipe - Duplex Use for Sewage Treatment Equipment & Oil Pipe & Seawater Desalination 

GRADE：2205/2207

STANDDARD：ASTM, AISI, DIN, EN, GB, JIS, ect

THICKNESS：0.3MM-3.0MM

SIZE RANG : φ6.35-φ114.3MM

LENGTH  :  ≥ 25MM

SURFACE：NPOLISHING, BRIGHT ANNEALING, PICKING, SAND BLASTING 

CERTIFICATION：PED, GJB

TRANSPORT : Sea Transportation or Air Transport, As your requirement

PROJECT : STRAIGHT PIPE

WELDING LINE TYPE : TIG STAINLESS STEEL PIPE PRODUCTION LINE

TOLERANCE : ACCORDING TO THE IMPLEMENTATION OF STANDARDS

PAYMENT : TT / LC / TT+LC / TT+CAD/ TT+DP

ASTM A688

water heater with   austenitic stainless steel welded pipe

ASTM A803

water heater in ferritic   stainless steel welded pipe

ASTM A790

ferritic austenitic   stainless steel seamless pipe and welded pipe

ASTM A651

water use stainless steel   tube

ASTM A249

boiler super-heater, heat   ex-changer and condenser with austenitic steel welded steel pipe

ASTM   A312

austenitic stainless steel   seamless pipe and welded pipe

ASTM A268

general seamless and welded   ferritic and martensitic stainless steel pipe

ASTM A269

general requirements for   general purpose austenitic alloy steel pipe

ASTM   A1016

ferritic steel and   austenitic steel pipe general requirements

ASTM E92

vickers   harness test method of metal material

ASTM E309

tubular steel magnetic   saturation eddy current inspection of practical discipline

ASTM A763

ferritic stainless steel   inter-granular corrosion sensitivity of the method

ASTM G48

ferric chloride solution is   used to test the pitting corrosion and crevice corrosion resistant alloy and   stainless steel standard test methods

GB/T 30065-2013

water   heater with ferritic stainless steel welded steel pipe

GB/T 30066-2013

heater   ex-changer and condenser with ferritic stainless steel welded steel pip

GB/T 21832-2008

austenitic,   ferritic duplex stainless steel welded tube

GB/T 2771-2008

fluid   conveying by stainless steel welded pipe

GB/T 24593-2009

austenitic   stainless steel welded tubes for heat exchanger

GB/T 228

metal   material tensile test at room temperature

GB/T 232

Metal   material bending test method of GB/T 232

 GB/T   241

metal   pipe hydraulic test method

GB/T 242

metal   tube flaring test method

GB/T 245

metal   edge test method

GB/T   246

metal   tube flattening test method

GB/T 2102

steel   pipe acceptance, packing, mark and quality certificate

GB/T 4334.5

sulfuric   acid stainless steel - copper sulfate corrosion test method

GB/T 6394

metal   average grain size determination method

GB/T 7735

steel   tube eddy current testing method

GB/T 30065-2013

water   heater with ferritic stainless steel welded steel pipe

GB/T 30066-2013

heater   ex-changer and condenser with ferritic stainless steel welded steel pip

JIS G3463-2006

stainless steel pipe for   boiler heat ex-changer

▶  Duplex Stainless Steel (DSS) 

It refers to approximately 50% of ferrite and austenite, and generally contains less than 30% of stainless steel. 

In the case where the C content is low, the Cr content is 18% to 28%, and the Ni content is 3% to 10%. Some steels also contain alloying elements such as Mo, Cu, Nb, Ti, and N.

This type of steel combines the characteristics of austenitic and ferritic stainless steels. Compared with ferrite, it has higher plasticity and toughness, no brittleness at room temperature, significantly improved resistance to intergranular corrosion and welding performance, and at the same time retains iron. The 475°C brittleness and high thermal conductivity of the ferritic stainless steel make it superplastic. 

Compared with austenitic stainless steels, the strength and resistance to intergranular corrosion and chloride stress corrosion resistance are significantly improved. 

Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-stainless steel. such as adding S, Ca, Se, Te and other elements. It has good cutting ability.

▶  PACKAGGING & DELIVERY

●  Be wrapped with polyvinyl chloride film
●  Stick label on the both end

Each Piece in polybag and several pieces per bundle,or according to customer's request

●  Delivery time:25-30 days after receiving deposit
●  Shipping details: Generally,the delivery time is 3-10 days for the sample ,about 25-35 for mass production

▶  PAYMENT TERM

●  We can also provide different payment terms (L / C, T / T, CIF，PayPal, Western Union)