ASTM A234 WP22 is a specification established by the American Society for Testing and Materials (ASTM) for a type of chromium-molybdenum alloy steel fitting that is commonly used in high-temperature and high-pressure applications. These fittings are designed to be welded and are often utilized in industries such as petrochemical, power generation, and refineries, where they play a crucial role in connecting and directing the flow of fluids. The "WP22" designation specifically refers to the alloy composition of the fitting, indicating that it contains chromium and molybdenum as its primary alloying elements. This alloy combination enhances the fitting's resistance to corrosion and provides excellent strength and durability at elevated temperatures. As a result, ASTM A234 WP22 fittings are well-suited for environments with demanding conditions that require reliable performance and longevity.
Suppliers of ASTM A234 WP22 fittings are typically metal tubular specialists who offer a range of industrial piping and tubing products. These suppliers source and provide a variety of fittings, including elbows, tees, reducers, and caps, all manufactured in accordance with the ASTM A234 WP22 specification. The fittings are produced through processes like forging or forming, ensuring their structural integrity and dimensional accuracy.
It is essential for customers to procure ASTM A234 WP22 fittings from reputable suppliers to ensure that they receive high-quality products that conform to the required standards. These fittings are crucial components within complex systems, where their reliability and compatibility directly impact the safety and efficiency of operations. Therefore, careful consideration should be given to the choice of supplier and the adherence to the ASTM specifications to guarantee optimal performance and long-term reliability of these fittings in demanding industrial applications.
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Specification:
| Specification | ASTM A234 WP22 |
| Type | Alloy Steel Fittings |
| Alloy Designation | Chromium-Molybdenum Alloy (Cr-Mo) |
| Application | High-temperature, high-pressure systems |
| Common Uses | Petrochemical, power generation, refineries, other high-demand industries |
| Alloy Composition | Chromium (Cr): 2.0-2.5% Molybdenum (Mo): 0.87-1.13% Other Elements: Carbon (C), Manganese (Mn), Silicon (Si), Sulfur (S), Phosphorus (P) |
| Features | Excellent corrosion resistance High strength at elevated temperatures |
| Manufacturing | Forged or formed |
| Fitting Types | Elbows, Tees, Reducers, Caps, etc. |
| Standards | Conforms to ASTM A234 WP22 specification |
| Supplier Type | Metal Tubular Specialists |
| Importance | Critical for system safety and efficiency |
Chemical Compositionof ASTM A234 WP22 FITTINGS
| Element | Composition Range |
| Chromium (Cr) | 2.0 - 2.5% |
| Molybdenum (Mo) | 0.87 - 1.13% |
| Carbon (C) | 0.05 - 0.15% |
| Manganese (Mn) | 0.30 - 0.60% |
| Silicon (Si) | 0.25 - 0.50% |
| Sulfur (S) | 0.025% max |
| Phosphorus (P) | 0.025% max |
Mechanical Properties of ASTM A234 WP22 FITTINGS
| Property | Value |
| Tensile Strength | 415 - 585 MPa (60 - 85 ksi) |
| Yield Strength (0.2% offset) | 205 MPa (30 ksi) min |
| Elongation | 30% min |
| Hardness | 197 Brinell max |
| Impact Toughness | ≥ 27 J (20 ft-lb) at -29°C (-20°F) |
Advantages of ASTM A234 WP22 FITTINGS
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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| Pharmaceutical Equipment | Chemical Equipment |
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