ASTM A928 UNS S32750 EFW Pipe Super Duplex Stainless steel Welded Pipes
ASTM A928 UNS S32750 EFW Pipe Manufacturer & Supplier
As a manufacturer of ASTM A928 UNS S32750 EFW pipe. We manufacture and supply electric fusion welded (EFW) pipes made from super duplex stainless steel UNS S32750 (Alloy 2507), offering superior strength, corrosion resistance, and reliability for aggressive environments.
What Is ASTM A928 UNS S32750 EFW Pipe
ASTM A928 is the standard specification for EFW ferritic/austenitic (duplex) stainless steel pipe. UNS S32750, also known as Super Duplex 2507, provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich environments.
Technical Specifications
Standard
ASTM A928 / ASME SA928
Grade
UNS S32750 / 1.4410 / Super Duplex 2507
Type
Electric Fusion Welded (EFW) Pipe
Sizes
½” NB to 48″ NB (or as per requirement)
Wall Thickness
SCH10 to SCH160 / XXS
Length
Single random, double random, or cut-length
NDE Testing
Hydrostatic, RT,
Certifications
EN 10204 3.1 / 3.2, NACE MR0175, ISO 9001
5 Classes of ASTM A928 UNS S32750 EFW Pipe
Class Welding Requirement Filler Metal in Passes Radiographic Requirement 1 Double welded All passes Completely radiographed 2 Double welded All passes No radiograph required 3 Single welded All passes Completely radiographed 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 Weld pass exposed to inside pipe surface: permitted without filler metal (see 6.2.2.1 and 6.2.2.2) Completely radiographed 5 Double welded All passes Spot radiographed
The starting material of UNS S32750 EFW Pipe is ASTM A240 UNS S32750 Plate
ASTM A240 UNS S32750 Chemical compostion
UNS Desig.
Type
C
Mn
P
S
Si
Cr
Ni
Mo
N
Cu
Other Elements
S32750
2507
0.030
1.20
0.035
0.020
0.80
24.0 – 26.0
6.0 – 8.0
3.0 – 5.0
0.24 – 0.32
0.50
…
ASTM A240 UNS S32750 Mechanical Property
UNS Designation
Type
Tensile Strength, min（ksi）
Tensile Strength, min（MPa）
Yield Strength, min（ksi）
Yield Strength, min（MPa）
Elongation in 2 in. or 50 mm, min, %
Hardness, max – Brinell, HBW
Hardness, max – Rockwell
Cold Bend
S32750
2507
116
795
80
550
15
310
32 HRC
not required
UNS S32750 EFW Pipe Heat treatment
UNS Designation
Grade
Temperature, °F [°C]
Quench
S32750
2507
1880–2060 [1025–1125]
rapid cooling in air or water
UNS S32750 Pipe and Metal Filler Specification
UNS Designation
Grade
ASTM Plate Specification No. and Grade
A5.4 Class
A5.4 UNS
A5.9 Class
A5.9 UNS
A5.11 Class
A5.11 UNS
A5.14 Class
A5.14 UNS
A5.22 Class
A5.22 UNS
S32750
2507
A240 S32750
E2594…
W39594…
ER2594…
S32750…
B
B
B
B
B
B
Applications of S32750 EFW Pipe
Offshore oil & gas platforms
Desalination plants
Petrochemical and chemical processing
Marine engineering
Pulp and paper industry
Heat exchangers and pressure vessels
ASTM A928 UNS S32750 EFW Pipe Testing & Inspection Requirements
Test
Requirement
Hydrostatic Test
Mandatory unless waived by purchaser
Nondestructive Testing
100% Radiographic (RT), Ultrasonic (UT), or Eddy Current
Weld Seam Examination
As per ASTM A928, Section 10
Visual & Dimensional
As per ASTM A999 and A928
PMI (Positive Material Identification)
On request
Intergranular Corrosion
Optional (ASTM A262 Practice E)
ASTM A928 UNS S32750 Pipe Marking & Certification
Pipes are marked with:
ASTM A928
Grade UNS S32750
Size, Schedule, Heat Number
Manufacturer name or logo
Certified to: EN 10204 Type 3.1 / 3.2
Optional compliance: NACE MR0175 / ISO 15156, PED 2014/68/EU, AD2000
