ASTM A234 Gr WPL6
ASTM A234 Gr WPL6 Pipe Fittings
Emirerri Steel is a globally recognized manufacturer and supplier of ASTM A234 Gr WPL6 Pipe Fittings, designed for use in low-temperature pressure piping systems. These fittings are made from wrought carbon steel and are suitable for butt-weld connections in seamless and welded pipelines.
The ASTM A234 WPL6 standard covers fittings that provide excellent toughness, strength, and weldability in sub-zero operating conditions, making them ideal for applications in cryogenic, power generation, and petrochemical industries.
Key Features
Exceptional low-temperature toughness
High tensile and yield strength
Excellent resistance to corrosion and pressure
Superior dimensional accuracy and finish
Easy to weld and fabricate
Suitable for seamless and welded pipe connections
Specification
| Standard | Specification |
|---|---|
| Product | Carbon Steel Butt Weld Pipe Fittings |
| Grade | ASTM A234 Gr WPL6 |
| Standard | ASME B16.9, ASME B16.11, MSS-SP-75 |
| Material Type | Wrought Carbon Steel (Low Temperature) |
| Manufacturing Type | Seamless / Welded / Fabricated |
| Size Range | ½” NB to 48” NB |
| Dimensions | ASME/ANSI B16.9, B16.28 |
| Type | Elbow, Tee, Reducer, Cap, Stub End, Bend |
| Pressure Rating | SCH 10S, SCH 40, SCH 80, SCH 160, XXS |
| End Connection | Beveled / Plain / Threaded |
| Form | Seamless / ERW / Welded / Fabricated |
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM | A234 WPL6 |
| ASME | SA234 WPL6 |
| EN | 10253-2 Grade P355NL1 / P355NL2 |
| DIN | StE355 / E355 |
| JIS | G3456 STPT480 |
| BS | 3601 3602 Grade 430 / 460 |
Available Sizes
Seamless: ½” NB to 24” NB
Welded / Fabricated: 24” NB to 72” NB
Wall Thickness: SCH 10 to SCH XXS
Special Sizes: Custom on Request
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.30 |
| Manganese (Mn) | 0.29 – 1.06 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Silicon (Si) | 0.10 – 0.35 |
| Nickel (Ni) | ≤ 0.40 |
| Chromium (Cr) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.40 |
| Molybdenum (Mo) | ≤ 0.15 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 415 MPa (min) |
| Yield Strength | 240 MPa (min) |
| Elongation | 20% (min) |
| Impact Test | Required at -46°C |
| Hardness (HB) | 197 (max) |
Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1425 – 1540°C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 60.5 W/m·K |
| Specific Heat | 486 J/kg·K |
Types of ASTM A234 Gr WPL6 Pipe Fittings
Elbow (45°, 90°, 180° – Long/Short Radius)
Equal & Reducing Tee
Concentric & Eccentric Reducer
End Cap
Stub End (Short / Long Pattern)
Pipe Bend (2D, 3D, 5D, 10D Radius)
Cross Fittings
Corrosion Resistance
ASTM A234 WPL6 Pipe Fittings show good resistance to mildly corrosive environments, including moisture, steam, and industrial atmospheres. For enhanced protection, the fittings can be galvanized, painted, or coated, extending their lifespan in harsh service conditions.
Heat Resistance
These fittings maintain their strength and ductility even under moderate to high temperatures, although they are primarily used for low-temperature applications (up to -46°C). They are ideal for cryogenic pipelines, refrigeration, and low-temperature vessels.
Heat Treatment
ASTM A234 Gr WPL6 fittings are normalized, tempered, or quenched and tempered as required by specification. Heat treatment ensures improved toughness, ductility, and impact strength, particularly for low-temperature performance.
Welding
These fittings can be welded using all standard welding methods, including MIG, TIG, and SMAW. Preheating and post-weld heat treatment (PWHT) may be recommended depending on thickness and service conditions to prevent cracking and maintain strength.
Fabrication
ASTM A234 WPL6 fittings are easy to machine, bend, and form using standard carbon steel fabrication techniques. They can be shaped or modified without compromising structural integrity, ensuring seamless integration in pipeline systems.
Applications
Low-Temperature Pressure Systems
Oil & Gas Pipelines
Power Generation Plants
Cryogenic and Refrigeration Systems
Petrochemical and Refinery Industries
Offshore Drilling & Marine Applications
Water Treatment & Chemical Processing Units