Duplex Steels are extremely resistant to corrosion and have exceptional mechanical strength for the special applications.Standard: ASTM A789/ ASTM A790, ASTM A312 or closer
Grades: UNS S31803, S32304, S32205, S32750, S32507, S31050, S33207, S32101 etc.
Size: OD: 5 - 1016 mm, Wt: 0.5~ 25mm, Length: 20m or as required
Tongji Engineering offers a comprehensive list of tubing alloys to fit the most and least common applications.
Stainless Steel: 304 Tubing, 316/ 316L/ 316H, 317/ 317L, 309S/ 310H, 310S/ 310H, 321/321H, 347/ 347H
Duplex Stainless Steel: UNS S31803, S32304, S32205, S32750, S32507, S31050, S33207, S32101
Super Austenitic: 6 Moly, 825, 904L, 800/ 800H, N08811
Super Ferritics/ Ferritics: 29-4C, S44627, 439, 444, 446
Markets We Serve:
Oil & Gas, Power Generation, Chemical, Petrochemical, Food & Dairy, Beverage, Pharmaceutical, Biopharmaceutical, General Commercial, Specialty Automotive
We always seek and improve our service as per requirement of our valued customers.
| Commodity | Duplex Steel Pipe(UNS S32304) |
| Process method | Cold drawn/ Cold rolled/ Welded. |
| Materials Grades | UNS S32304, 23Cr- 4Ni- 0.1N |
| Standards: | ASTM A789, ASTM A790 or Closer |
| Size | NPS:1/8 to 40" , Schedule: 5S to XXS. Length: 20m or as required. |
| OD: 5 - 1016 mm, Wt: 0.5~ 25mm, Length:20m or as required. | |
| Shape | In straight length or as U-bend |
| Surface Finished | Bright Annealed/ Picking/ Manual Polish/ Mechanical Polish or as required |
| Inspection Testing | 100% Ultrasonic Test, 100%Eddy Current Test, 100%Hydraulic Test, 100% X-Ray Test to welded pipe or as required. |
| Mechanical Test, Hardness Test, Inter-granular corrosion Test. | |
| Certificate | EN 1024 3.1/ 3.1B/ 3.2, PED, DNV, TUV. |
| Packing | Wooden case/ Steel framed plywood case/ simple packing. |
| Delivery Time | By mutual agreement. |