ASTM A850 WPS32750 Super Duplex Stainless Steel Butt Weld Reducing Tee For Marine Engineering
ASTM A850 WPS32750 reducing tees are one of super duplex stainless steel butt weld fittings. A seamless super duplex stainless steel reducing tee is a three-way wrought pipe fitting used to branch a smaller pipe from a larger main pipe. It has one run (the straight main line) and one branch outlet smaller than the run. “Reducing” means the branch size is smaller than the run size, e.g. 8″ × 6″, 6″ × 4″, 4″ × 2″. YUHONG GROUP can provide various kinds of stainless steel butt weld fittings, such as 45°/90°/180°elbows, reducing tees, equal tees, concentric reducers, eccentric reducers, end caps, and so on. Our steel fittings are widely used in industries, like chemical industry, petrochemical industry, oil and gas plant, marine system, desalination, etc.
Chemical Composition:
| Carbon (C) |
≤0.03 |
| Silicon (Si) |
≤0.80 |
| Manganese (Mn) |
≤1.20 |
| Phosphorus (P) |
≤0.035 |
| Sulfur (S) |
≤0.020 |
| Chromium (Cr) |
24.0 – 26.0 |
| Nickel (Ni) |
6.0 – 8.0 |
| Molybdenum (Mo) |
3.0 – 5.0 |
| Nitrogen (N) |
0.24 – 0.32 |
| Copper (Cu) |
≤0.50 |
| Tungsten (W) |
≤0.50 |
Mechanical Properties:
| Tensile Strength, Rm |
≥800 MPa (116 ksi) |
| Yield Strength (0.2% offset), Rp0.2 |
≥550 MPa (80 ksi) |
| Elongation (A, 50 mm gauge) |
≥25% |
| Hardness |
≤310 HB / ≤32 HRC |
Main Features:
Good weldability
Superior chloride corrosion resistance
High mechanical strength
Balanced duplex microstructure
Good erosion-corrosion and cavitation resistance
Typical Applications:
- Offshore oil & gas: subsea pipelines, seawater injection lines, produced water, process manifolds, riser accessories
- Desalination: seawater reverse osmosis (SWRO), brine circulation, intake and outfall piping
- Chemical processing: chloride-rich acid service, pulp & paper bleaching lines, fertilizer plants
- Power generation: flue gas desulfurization (FGD), cooling water circuits with high chloride
- Marine engineering: seawater cooling, ballast systems, ship process piping
- Petrochemical: sour service, hydrocarbon + chloride mixed media
- Mining: saline leachate, mineral processing brine lines
Other Fitting Types under ASTM A850 WPS32750:
1. Equal Tee
2. 90° Long Radius Elbow (LR elbow): R = 1.5D
3. 90° Short Radius Elbow (SR elbow): R = 1.0D
4. 45° Elbow
5. Concentric Reducer
6. Eccentric Reducer
7. End Cap
8. Stub End
9. Cross (Equal Cross / Reducing Cross)
10. Y-Tee / Lateral Tee
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