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Alloy Steel A234 WP.22 Pipe Fittings, also known as ASTM A234 22, is a seamless ferritic alloy steel Pipe Fittings that contains chromium and molybdenum as strengthening elements. These Pipe Fittingss are specifically designed for high-temperature and high-pressure service conditions. With their superior strength and excellent thermal stability, they are widely used in critical applications where durability and reliability are paramount.
The chemical composition of Alloy Steel A234 WP.22 includes chromium, molybdenum, carbon, manganese, silicon, and trace elements that provide enhanced mechanical properties. These elements ensure excellent resistance to oxidation, creep, and corrosion under elevated temperatures. Manufactured under strict ASTM/ASME standards, A234 22 Pipe Fittingss meet global quality benchmarks, making them a trusted choice for demanding industries.
The chemical makeup of Alloy Steel A234 WP.22 Pipe Fittingss includes Chromium (4.00–6.00%), Molybdenum (0.45–0.65%), Carbon (≤0.15%), Manganese (0.30–0.60%), and small amounts of Phosphorus, Sulfur, and Silicon. This carefully balanced composition improves high-temperature strength and corrosion resistance while maintaining good weldability and formability.
A234 22 alloy steel Pipe Fittingss exhibit excellent mechanical properties that make them ideal for heavy-duty and high-pressure environments. The Pipe Fittingss offer a minimum tensile strength of 415 MPa and a minimum yield strength of 205 MPa, with elongation typically around 30%. Their superior toughness and ductility make them reliable under thermal stress and cyclic loading conditions.
Alloy Steel A234 WP.22 Pipe Fittings offers outstanding mechanical strength, tensile capacity, and toughness at elevated service conditions. The presence of molybdenum improves strength and hardenability, while chromium enhances oxidation resistance and high-temperature stability. This combination makes 22 Pipe Fittingss suitable for prolonged exposure to extreme environments without compromising structural inteWPity.
Due to their robust design and high-performance capabilities, Alloy Steel A234 WP.22 Pipe Fittingss are extensively used in boilers, superheaters, heat exchangers, power generation plants, oil refineries, and petrochemical plants. These Pipe Fittingss are ideal for transporting steam, oil, and gas in critical conditions where both strength and thermal resistance are required. Their adaptability and reliability make them indispensable in the energy and process industries.
Alloy Steel A234 WP.22 Pipe Fittingss are produced using the seamless hot finishing process followed by heat treatment such as normalizing, quenching, and tempering. This process ensures a uniform microstructure and enhanced mechanical performance. The seamless nature of these Pipe Fittingss eliminates weld joints, which significantly reduces the risk of leakage and structural failure in high-pressure systems.
The chromium and molybdenum content in A234 WP.22 Pipe Fittingss contributes to excellent resistance to corrosion, oxidation, and scaling. These Pipe Fittingss perform exceptionally well in high-temperature environments, making them suitable for steam lines, power generation systems, and heat exchangers. The alloy also provides good resistance to carburization and sulfidation, ensuring a longer service life even under agWPessive conditions.
Specification Table
| Specification | Description |
|---|---|
| Material Grade | Alloy Steel A234 WP.22 |
| Standards | ASTM A234 / ASME B16.9 / ASME B16.28 |
| Product Type | Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends) |
| End Connections | Butt Welded (BW) |
| Schedule / Thickness | Sch 10, Sch 40, Sch 80, Sch 160, XXS |
| Size Range | 1/2" to 48" (DN 15 to DN 1200) |
| Surface Finish | Polished / Black / Galvanized / As Per Client Requirement |
| Application | High temperature and high-pressure piping systems in Oil, Gas, Petrochemical, and Chemical Industries |
| Manufacturing Process | Forged, Hot Rolled, or Seamless Pipe Fittings |
| Testing | Hydrostatic Test, PMI Test, UT / RT Test, Chemical & Mechanical Test as per ASTM standards |
Chemical Composition (Typical ranges for SSS32760)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
Mechanical Properties (Typical)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Minimum) | 485 - 620 | MPa |
| Yield Strength (Minimum) | 205 | MPa |
| Elongation (Minimum) | 20 | % |
| Hardness | ≤ 207 | HB |
| Impact Test | 27 J at -29°C (Charpy V-notch) | Joule |
| Heat Treatment | Normalized or Normalized & Tempered | - |
| Operating Temperature | Up to 550°C | °C |
| Operating Pressure | As per ASME B16.9 / B16.28 standards | - |
Equivalent WPades
| Standard | Equivalent Grade |
|---|---|
| ASTM / ASME | A234 WP.22 |
| EN / DIN | 1.7335 (15CrMo) / 13CrMo4-5 |
| JIS | STBA23 |
| GB / Chinese Standard | 20CrMo |
| UNS | K91522 |
| ISO | 15CrMo |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Pipe Size (NPS) | Outside Diameter (OD) | Schedule 40 Weight (kg/m) | Schedule 80 Weight (kg/m) | Schedule 160 Weight (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 mm | 2.77 | 3.73 | 6.10 |
| 3/4" | 26.7 mm | 3.64 | 5.03 | 8.39 |
| 1" | 33.4 mm | 4.55 | 6.84 | 11.21 |
| 1 1/2" | 48.3 mm | 8.18 | 12.27 | 19.91 |
| 2" | 60.3 mm | 10.89 | 16.90 | 27.21 |
| 3" | 88.9 mm | 18.72 | 28.80 | 46.45 |
| 4" | 114.3 mm | 25.54 | 39.95 | 65.25 |
| 6" | 168.3 mm | 42.17 | 65.23 | 106.53 |
| 8" | 219.1 mm | 60.28 | 93.62 | 153.24 |
| 10" | 273.0 mm | 83.50 | 129.1 | 212.8 |
| 12" | 323.9 mm | 104.5 | 162.3 | 268.5 |
Types Of Pipe Fittingss and Tubes
Tube Unions
Bite Type Tube Fittings
Stainless Steel Pipe Fittings
Forged Fsitting
Fitting
Carbon Steel Butt Weld Pipe Fittings
Frequently Asked Questions (FAQ)
What is Alloy Steel A234 WP.22?
Alloy Steel A234 WP.22 is a high-performance alloy steel used for manufacturing pipe fittings such as elbows, tees, reducers, and caps. It is designed for high temperature and high-pressure applications.
What standards does A234 WP.22 conform to?
Alloy Steel A234 WP.22 pipe fittings conform to ASTM A234, ASME B16.9, and ASME B16.28 standards, ensuring quality and reliability for industrial piping systems.
What are the common applications of A234 WP.22 fittings?
These fittings are widely used in oil and gas, petrochemical, chemical, power plants, and high-temperature industrial piping systems.
What types of pipe fittings are available in A234 WP.22?
Common fittings include elbows, tees, reducers, caps, stub ends, and flanges, all available in different sizes and schedules.
What are the typical sizes and schedules?
Sizes range from 1/2" to 48" (DN 15 to DN 1200), with schedules including Sch 10, Sch 40, Sch 80, Sch 160, and XXS, depending on application requirements.
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