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Solitaire Steel & Engineering LLP, based in Khetwadi, Mumbai, India, is a trusted manufacturer and global supplier of premium-quality ASTM A403 stainless steel pipe fittings. Renowned for our adherence to the highest quality standards, we utilize advanced manufacturing techniques to produce fittings that deliver exceptional performance under the most challenging industrial conditions. These fittings are engineered to withstand extreme pressures, high temperatures, and corrosive environments, making them a preferred choice for industries worldwide.
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ASTM A403 stainless steel pipe fittings are designed for use in pressure piping systems and pressure vessel applications. These fittings are manufactured using forged or wrought austenitic stainless steel, ensuring superior strength, durability, and corrosion resistance. Key grades include WP304/L, WP316/L, WP321, and WP347, which cater to diverse industrial requirements such as chemical processing, petrochemical plants, power generation, and more.
Applications include joining or redirecting pipelines in refineries, chemical plants, and energy facilities. For example, WP304 fittings are ideal for moderate corrosive environments, while WP316 fittings are suited for marine or chloride-rich conditions. These fittings are also cost-efficient, providing long-term savings compared to alternative materials.
| Specification | Details |
| Grades | WP304, WP304L, WP316, WP316L, WP321, WP347 |
| Size Range | 1/2″ NB to 48″ NB |
| Wall Thickness | SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, SCH XXS |
| Standards | ASTM A403, ASME B16.9, MSS-SP-43 |
| Types | Elbow, Tee, Reducer, Cap, Stub End, Nipple |
| Applications | Oil & gas pipelines, power plants, chemical processing |
| Element | 304 (%) | 316 (%) | 321 (%) | 347 (%) |
| Carbon | ≤0.08 | ≤0.08 | ≤0.08 | ≤0.08 |
| Chromium | 18–20 | 16–18 | 17–19 | 17–20 |
| Nickel | 8–12 | 10–14 | 9–12 | 10–14 |
| Molybdenum | — | 2–3 | — | — |
| Titanium/Niobium | — | — | Ti ≥5×C | Nb 10×C |
| Property | 304 | 316 | 321 | 347 |
| Tensile Strength | ≥515 MPa | ≥515 MPa | ≥515 MPa | ≥515 MPa |
| Yield Strength | ≥205 MPa | ≥205 MPa | ≥205 MPa | ≥205 MPa |
| Elongation | ≥40% | ≥40% | ≥40% | ≥40% |
| Fitting Type | Grade | Price (USD/Unit) | Regional Pricing |
| Elbows | WP304 | $10–$25 | Popular in Asia |
| Reducers | WP316 | $15–$40 | Preferred in Europe |
| Caps | WP321 | $12–$30 | Widely used in Middle East |
| Tees | WP347 | $18–$50 | High demand in North America |
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