MSS SP 75 WPHY 42
MSS SP 75 WPHY 42 Pipe Fittings
MSS SP 75 WPHY 42 Pipe Fittings are high-yield carbon steel butt-weld fittings designed for high-pressure and high-temperature piping applications. The term WPHY stands for Wrought Pipe High Yield, indicating its exceptional strength and toughness properties. These fittings conform to MSS SP 75 standards, which specify requirements for high-strength wrought steel butt-welding fittings used in oil, gas, and petrochemical systems.
At Emirerri Steel, we manufacture and supply MSS SP 75 WPHY 42 Fittings that meet stringent international quality standards. They are widely used in transmission pipelines, compressor stations, and refineries where reliability and durability are paramount.
Key Features
High yield strength (minimum 42,000 psi)
Excellent resistance to impact and fatigue
Superior performance under high-pressure conditions
Excellent weldability and formability
Uniform wall thickness and dimensional accuracy
Available in seamless and welded construction
Suitable for onshore and offshore pipeline systems
Specification
| Specification | Details |
|---|---|
| Standard | MSS SP 75 / ASTM A860 / ASME SA860 |
| Grade | WPHY 42 |
| 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 Coated, Pickled |
| Testing | Hydrostatic, Non-Destructive, Tensile, Impact |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A860 WPHY 42 |
| ASME | SA860 WPHY 42 |
| API | API 5L X42 |
| ISO | L290 |
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 | 60,000 psi (min) |
| Yield Strength | 42,000 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 42 Pipe Fittings
Elbow (45°, 90°, 180°)
Equal & Reducing Tee
Concentric & Eccentric Reducer
End Cap & Stub End
Cross (Equal & Unequal)
Bends & Laterals
Corrosion Resistance
MSS SP 75 WPHY 42 fittings demonstrate excellent resistance to corrosion in mild and moderate environments. When coated with anti-corrosive finishes or paint, they can effectively resist atmospheric corrosion and oxidation during prolonged service in pipelines.
Heat Resistance
These fittings maintain their strength and structural integrity at elevated temperatures. Their metallurgical composition allows them to perform reliably in both low and moderately high-temperature applications.
Heat Treatment
Fittings are typically normalized, quenched, and tempered to enhance mechanical properties. Heat treatment ensures a refined microstructure, improved toughness, and high yield strength as required by MSS SP 75 specifications.
Welding
MSS SP 75 WPHY 42 Pipe Fittings offer excellent weldability using conventional methods such as MIG, TIG, or SAW. Preheating is recommended to reduce the risk of cracking, and post-weld heat treatment (PWHT) ensures optimum joint strength and integrity.
Fabrication
These fittings are easily fabricated by standard industrial techniques such as hot forming, cold forming, and machining. Dimensional accuracy and wall thickness uniformity are maintained throughout the manufacturing process to ensure proper fit and performance.
Applications
Oil and Gas Transportation Pipelines
Petrochemical and Refinery Plants
Offshore Drilling Platforms
Power Generation and Energy Sectors
Chemical Processing Industries
High-Pressure Steam and Hydraulic Systems