Duplex Steel Stainless Pipe

Duplex Steel Stainless Pipe Specifications:
ASTM A789 Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
ASTM A790 (ASME SA790) Standard Specification for Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
ASTM A928 (ASME SA928) Standard Specification for Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
GB/T 21832-2008 Austenitic--Ferritic(duplex) grade stainless steel welded tubes and pipes
GB/T 21833-2008 Austenitic-Ferritic (duplex) grade stainlee steel seamless tubes and pipes 

Duplex Steel Stainless Pipe Features:

1.Superior resistance to general and local corrosion, especially to stress corrosion, pitting corrosion, crevice corrosion, corrosion fatigue and abrasion & corrosion.
2.Good weldability
3.Good mechanical properties
4.Excellent intergranular corrosion resistance
5.High cost-effectiveness, long life time

Main Testing Terms and Procedure:

• 1. Heat Treatment and Solution Annealing / Bright Annealing

• 2. Cutting to required length and deburring;

• 3. Chemical Composition Analysis Test With 100% PMI and One tube from each heat by Direct Reading Spectrometer

• 4. Visual Test and Endoscope Test for Surface Quality Test

• 5. 100% Hydrostatic Test and 100% Eddy Current Test

• 6. Ultrasonic Test subject to the MPS (Material Purchase Specification)

• 7. Mechanical Tests includes Tension Test, Flattening Test, Flaring Test, Hardness Test

• 8. Impact Test subject to Standard request

• 9. Grain Size Test and Intergranular Corrosion Test

• 10. Ultrasoic measuring of Wall Thickness

  
  

  Marking & Packing
  

• Marking according to MPS and Standard

• Stainless Steel Tubes Ends with Caps according to PO

• In Seaworthy Wooden Cases With Plastic Paper protect

• In Plywood Cases With Plastic Paper Protect(Recommend, All Plywood Cases made by ourselves with lower cost.)

• Steel Racks Package

• Hexagonal packing in Bundles