ASTM A928 Class 1 S32750 Duplex Stainless Steel Welded Pipe
Shape：round
Technique：Cold Rolled
Surface Treatment：Sanded /Mirror/Hairline Brushed
Thickness：0.3-30mm
out Diameter：8-219mm
Length：5.8/6m or Custom
Stock：in Stock
Sample：Available
Transport Package：Standard Sea-Worthy Packing
If you are seeking ASTM A928 Class 1 UNS S32750 (2507) Super Duplex Stainless Steel Welded Pipes engineered to withstand severe chloride corrosion and extreme offshore environmental pressures, GNEE is your premier partner. With our advanced manufacturing expertise and extensive global project track record, we deliver high-performance piping solutions tailored to the most demanding industrial requirements.
The ASTM A928 Class 1 S32750 pipes we supply are produced via Electric Fusion Welding (EFW). The "Class 1" designation signifies that filler metal is used in all weld passes, accompanied by comprehensive radiographic testing (RT) to guarantee absolute weld integrity and a joint efficiency of 1.0. Every UNS S32750 pipe undergoes a precise solution annealing process between 1050°C and 1125°C, followed by rapid water quenching. This meticulous thermal treatment, combined with a PREN (Pitting Resistance Equivalent Number) of 40 or higher, maximizes the material's resistance to localized pitting and Stress Corrosion Cracking (SCC).
Furthermore, GNEE's S32750 welded pipes are fully compliant with NACE MR0175/ISO 15156 for sour service and strictly adhere to the rigorous NORSOK M-630 MDS D55 offshore specifications. We provide comprehensive EN 10204 3.1/3.2 certification with full heat-number traceability, ensuring long-term safety, durability, and operational stability for your global oil and gas exploration, subsea systems, and desalination facilities.
ASTM A928 S32750 Duplex Stainless Steel pipe grade
Class 1-Pipe shall be double welded by processes using fifiller metal in all passes and shall be radiographed completely.
Class 2-Pipe shall be double welded by processes using filler metal in all passes. No radiograph is required.
Class 3-Pipe shall be single welded by processes using filler metal in all passes and shall be radiographed completely.
Class 4-Same as Class 3, except that the weld pass exposed to the inside pipe surface is permitted to be made without the addition of filler metal
Class 5-Pipe shall be double welded by processes using filler metal in all passes and shall be spot radiographed.
specification
ASTM A928 S32750 Duplex Stainless Steel Pipe Dimensions and tolerances
Outer diameter: typically ranging from 1/2 "to 24" (12.7-610 mm).
Wall thickness: According to ASME B36.19M standard, the allowable tolerance is ± 10%.
Length: Random length or cut to length.
ASTM A928 Class 1 S32750 Duplex Stainless Steel Chemical Composition
|
UNS GRA. |
ASTM A928 Class 1 S32750 DUPLEX STEEL CHEMICAL COMPOSITION % MAXIMUM | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | MN | P | S | SI | CR | NI | MO | CU | N | |
| S32202 | 0.03 | 2.0 | 0.040 | 0.01 | 1.0 | 21.5-24.0 | 1.0-2.8 | 0.45 | --- | 0.18-0.26 |
| S32750 | 0.03 | 1.2 | 0.035 | 0.02 | 0.8 | 24.0-26.0 | 6.0-8.0 | 3.0-5.0 | 0.5 | 0.24-0.32 |
ASTM A928 S32750 Duplex Stainless Steel Pipe Mechanical Properties
| GRADE | Tensile Strength, min ksi [MPa] | Yield Strength, min ksi [MPa] |
|---|---|---|
| S32750 | 116 [800] | 80 [550] |
Tolerance chart of SA 928 UNS S32750 EFW pipe
| Out diameter | Tolerance of pipe end | Tolerance of pipe body |
|
219.1～273.1 |
+1.6mm, -0.4mm | ±0.75% |
| 274.0～320 | +2.4mm, -0.8mm | ±0.75% |
| 323.9～457 | +2.4mm, -0.8mm | ±0.75% |
| 508 | +2.4mm, -0.8mm | ±0.75% |
| 559～610 | +2.4mm, -0.8mm | ±0.75% |
What is the difference between ASTM A790 and A928?
ASTM A790 specifies the elements and requirements for the manufacture of seamless and welded pipes, while ASTM A928 covers only electric fusion welded pipes. ASTM A790 requires that duplex and super duplex steel pipes be welded without the addition of any filler metal.
inspection
Our quality control process includes 100% radiographic testing (RT), penetrant testing (PT), and high-pressure water pressure testing to ensure that there are no defects such as pores or lack of fusion inside the pipes.
ASTM A928 UNS S32750 EFW pipe Distributor
high quality packaging
The package is packed with waterproof paper and steel strapping, which meets the standard export sea freight packaging requirements and is suitable for various modes of transportation or can be customized according to customer requirements.
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