MSS SP 75 WPHY 52
MSS SP 75 WPHY 52 Pipe Fittings
MSS SP-75 WPHY 52 Pipe Fittings are high-strength, high-yield carbon steel fittings designed for high-pressure and high-temperature pipeline systems. The term WPHY stands for Wrought Pipe High Yield, indicating fittings manufactured to deliver exceptional strength, toughness, and durability. These fittings conform to MSS SP-75, a standard specification covering wrought steel butt-welding fittings used in oil, gas, and petrochemical transmission pipelines.
At Emirerri Steel, we manufacture and export MSS SP-75 WPHY 52 Pipe Fittings using high-quality raw materials and precision forming techniques. They are widely used in critical pipeline installations that require high performance under extreme pressure and temperature conditions.
Key Features
High yield strength of minimum 52,000 psi
Superior mechanical and impact resistance
Excellent corrosion and oxidation resistance
Reliable performance in high-pressure service
Compatible with both seamless and welded pipe systems
Good weldability and machinability
Long operational life and dimensional accuracy
Specification
| Specification | Details |
|---|---|
| Standard | MSS SP-75 / ASTM A860 / ASME SA860 |
| Grade | WPHY 52 |
| Material | High Strength Low Alloy Carbon Steel |
| Manufacturing Type | Seamless, Welded, Fabricated |
| Size Range | ½” to 48” (DN15 to DN1200) |
| Pressure Rating | SCH 10 to SCH 160, XXS |
| Connection Type | Butt Weld |
| Surface Finish | Black, Anti-Rust Coating, Galvanized |
| Testing | Hydrostatic, Non-Destructive, Impact, Tensile |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A860 WPHY 52 |
| ASME | SA860 WPHY 52 |
| API | API 5L X52 |
| ISO | L360 |
Available Sizes
Seamless fittings: up to 24” NB
Welded fittings: up to 48” NB
Wall Thickness: SCH 10 to SCH 160, XXS
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.26 |
| Manganese (Mn) | 1.00 – 1.70 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Silicon (Si) | 0.15 – 0.40 |
| Nickel (Ni) | ≤ 0.50 |
| Chromium (Cr) | ≤ 0.30 |
| Molybdenum (Mo) | ≤ 0.25 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 66,000 psi (min) |
| Yield Strength | 52,000 psi (min) |
| Elongation | 20% (min) |
| Hardness | 197 HB (max) |
| Impact Energy | As per ASTM A370 |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425 – 1540°C |
| Thermal Conductivity | 52 W/m·K |
| Modulus of Elasticity | 200 GPa |
Types of MSS SP-75 WPHY 52 Pipe Fittings
Elbows (45°, 90°, 180°)
Equal and Reducing Tees
Concentric & Eccentric Reducers
Pipe Caps & Stub Ends
Cross (Equal & Unequal)
Bends & Laterals
Corrosion Resistance
MSS SP-75 WPHY 52 fittings exhibit excellent corrosion resistance when exposed to moisture, chemicals, and industrial environments. They resist oxidation and surface scaling, especially when coated or galvanized, making them suitable for offshore and onshore oil and gas pipelines.
Heat Resistance
These fittings maintain structural integrity under fluctuating and high-temperature environments. Their metallurgical composition provides high resistance to thermal fatigue and ensures durability in heat-exposed systems.
Heat Treatment
The fittings undergo normalizing, quenching, and tempering to achieve desired strength and toughness. Proper heat treatment refines the grain structure, enhances impact resistance, and ensures compliance with MSS SP-75 mechanical property requirements.
Welding
MSS SP-75 WPHY 52 Pipe Fittings offer excellent weldability using standard welding procedures such as MIG, TIG, and SAW. Preheating before welding and post-weld heat treatment (PWHT) are recommended for optimal mechanical performance and to prevent cracking.
Fabrication
These fittings are fabricated through hot forming or cold forming methods, depending on the size and thickness. They can be machined and shaped to tight tolerances without compromising mechanical strength, ensuring easy installation and reliable performance.
Applications
Oil and Gas Transmission Pipelines
Petrochemical and Refinery Plants
Offshore Drilling and Marine Platforms
Power Generation and Thermal Plants
Chemical Processing Units
High-Pressure Steam and Water Systems