MSS SP 75 WPHY 46
MSS SP-75 WPHY 46 Pipe Fittings
MSS SP-75 WPHY 46 Pipe Fittings are high-yield carbon steel butt-weld fittings designed for high-pressure and high-temperature pipeline systems. The designation “WPHY” stands for Wrought Pipe High Yield, indicating superior mechanical strength and toughness. These fittings are produced as per the MSS SP-75 standard, which governs high-strength wrought steel fittings used in transmission and distribution of oil, gas, and petrochemical products.
At Emirerri Steel, we manufacture and export MSS SP-75 WPHY 46 Fittings that meet global quality standards. Our fittings are engineered for use in demanding applications where durability, corrosion resistance, and consistent performance are crucial.
Key Features
High yield strength (minimum 46,000 psi)
Excellent mechanical toughness and durability
Superior corrosion and erosion resistance
Compatible with seamless and welded pipelines
Excellent weldability and formability
Dimensional accuracy with uniform wall thickness
Long service life under extreme conditions
Specification
| Specification | Details |
|---|---|
| Standard | MSS SP-75 / ASTM A860 / ASME SA860 |
| Grade | WPHY 46 |
| 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, NDT, Tensile, Impact Test |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A860 WPHY 46 |
| ASME | SA860 WPHY 46 |
| API | API 5L X46 |
| ISO | L320 |
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 | 46,000 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 46 Pipe Fittings
Elbows (45°, 90°, 180°)
Equal and Reducing Tees
Concentric and Eccentric Reducers
Pipe Caps & Stub Ends
Cross (Equal & Unequal)
Bends & Laterals
Corrosion Resistance
MSS SP-75 WPHY 46 fittings provide excellent resistance to corrosion, oxidation, and chemical attack in moderate and harsh environments. They are suitable for use in oil and gas systems, refineries, and offshore platforms where moisture and contaminants are present.
Heat Resistance
These fittings retain mechanical strength and structural stability under elevated temperatures. Their chemical composition enables them to handle thermal stresses effectively in high-temperature service conditions.
Heat Treatment
WPHY 46 fittings undergo normalizing, quenching, and tempering heat treatments to refine grain structure, increase toughness, and achieve the specified mechanical strength. This ensures enhanced durability and resistance to impact and fatigue.
Welding
MSS SP-75 WPHY 46 Pipe Fittings exhibit excellent weldability with standard welding techniques including MIG, TIG, and SAW. Proper preheating and post-weld heat treatment (PWHT) are recommended to avoid residual stress and ensure superior joint integrity.
Fabrication
These fittings are easily fabricated through hot forming or cold forming methods. They can be machined and shaped accurately without compromising their mechanical strength. Quality control during fabrication ensures dimensional precision and consistent performance.
Applications
Oil and Gas Pipeline Systems
Petrochemical and Refinery Industries
Power Generation Plants
Offshore and Onshore Drilling Platforms
Chemical Processing Units
High-Pressure Steam and Water Transmission Lines