MSS SP 75 WPHY 65
MSS SP 75 WPHY 65 Pipe Fittings
Emirerri Steel is a trusted manufacturer and exporter of MSS SP 75 WPHY 65 Pipe Fittings, designed to deliver exceptional strength, durability, and reliability in high-pressure piping systems. These Wrought Pipe High Yield (WPHY) fittings are engineered to meet the rigorous requirements of oil, gas, petrochemical, and power generation industries.
The WPHY 65 grade offers superior yield strength and impact toughness, making it an ideal choice for critical applications involving high-pressure fluid transmission.
Key Features
High yield strength (65,000 psi minimum) for heavy-duty performance
Excellent weldability and machinability
Good resistance to corrosion and oxidation
Suitable for both onshore and offshore pipeline systems
Manufactured in seamless and welded construction
Conforms to MSS SP 75, ASTM A860, and ASME B16.9 standards
Specification
| Standard | MSS SP 75 / ASME B16.9 / ASME B16.28 |
|---|---|
| Grade | WPHY 65 |
| Material | Carbon Steel |
| Manufacturing Type | Seamless / Welded / Fabricated |
| Size Range | ½” to 48” (DN15 – DN1200) |
| Pressure Rating | SCH 10S to SCH XXS / STD / XS / 160 |
| Testing | Hydrostatic, NDT, PMI, UT, RT as per MSS SP 75 |
| Surface Finish | Black Painted, Anti-Rust Oil Coated, Hot-Dip Galvanized |
| Ends | Beveled / Plain / Threaded / Flanged |
| Certification | EN 10204 3.1 / 3.2 |
Equivalent Grade
| Standard | Equivalent Grade |
|---|---|
| ASTM | A860 WPHY 65 |
| ASME | SA860 WPHY 65 |
| API | 5L X65 |
| EN | P460QL2 |
| DIN | StE 460.7 |
Available Sizes
Seamless fittings: Up to 24” NB
Welded fittings: 24” NB to 48” NB
Thickness: SCH 10 to SCH XXS and custom sizes on request
Chemical Composition
| Element | % Composition (Max/Min) |
|---|---|
| Carbon (C) | 0.26 Max |
| Manganese (Mn) | 1.15–1.60 |
| Phosphorus (P) | 0.035 Max |
| Sulphur (S) | 0.035 Max |
| Silicon (Si) | 0.13–0.37 |
| Vanadium (V) | 0.03–0.08 |
| Niobium (Nb) | 0.02–0.05 |
| Titanium (Ti) | 0.02–0.05 |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (Min) | 448 MPa (65,000 psi) |
| Tensile Strength (Min) | 535 MPa (78,000 psi) |
| Elongation | 21% Min |
| Hardness (HB) | 235 Max |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425–1540°C |
| Thermal Conductivity | 50 W/m·K |
| Modulus of Elasticity | 200 GPa |
| Specific Heat | 486 J/kg·K |
Types of MSS SP 75 WPHY 65 Fittings
45° & 90° Elbows
Long & Short Radius Elbows
Equal & Reducing Tees
Concentric & Eccentric Reducers
Pipe Caps & Stub Ends
Crosses & Laterals
Corrosion Resistance
MSS SP 75 WPHY 65 fittings exhibit moderate corrosion resistance due to their carbon steel composition. To enhance resistance in aggressive or moist environments, protective coatings such as black paint, epoxy, or galvanization are applied. For more severe corrosive conditions, internal lining or external coatings can be provided.
Heat Resistance
These fittings maintain mechanical stability and tensile strength under elevated temperatures up to 600°F (315°C). However, for continuous service above this temperature, proper post-weld heat treatment is recommended to retain ductility and toughness.
Heat Treatment
Normalizing: To refine grain structure and improve toughness.
Quenching and Tempering: To enhance mechanical strength and hardness.
Stress Relieving: To reduce residual stresses after forming or welding.
All fittings undergo appropriate heat treatment as per MSS SP 75 and ASTM A860 requirements.
Welding
MSS SP 75 WPHY 65 fittings are readily weldable using conventional processes such as MIG, TIG, and SMAW. Proper preheating (150–200°C) and post-weld heat treatment (PWHT) are recommended to minimize weld stress and avoid cracking.
Fabrication
These fittings can be fabricated through hot forming or cold forming processes. During forming, the material retains its strength and toughness, and subsequent heat treatment ensures compliance with mechanical property requirements.
Applications
Oil & Gas Transmission Pipelines
Petrochemical Processing Plants
Offshore Drilling Platforms
Refineries & Power Plants
High-Pressure Water Lines
Shipbuilding & Marine Engineering
Chemical Process Equipment