ASTM A234 WPB Carbon Steel Fitting Elbow 45DEG Long Radius Buttwelded
ASTM A234 WPB Carbon Steel Elbow 45DEG Long Radius Buttwelded B16.9
ASTM A234 WPB carbon steel elbow is a forged carbon steel pipe fittings manufactured according to the strict industrial standard ASTM A234, suitable for medium and high temperature services, and mainly connected by butt welding. Its core value lies in its excellent comprehensive performance (strength, weldability), reliability, and relatively low cost, making it a standard solution for changing direction in pipeline systems in many industrial fields such as petroleum, natural gas, chemical, power, shipbuilding, etc.
Chemical Requirements of ASTM A234 WPB
| Element | Content, % |
| ASTM A234 WPB | |
| Carbon [C] | ≤0.30 |
| Manganese [Mn] | 0.29-1.06 |
| Phosphorus [P] | ≤0.050 |
| Sulfur [S] | ≤0.058 |
| Silicon [Si] | ≥0.10 |
| Chromium [Cr] | ≤0.40 |
| Molybdenum [Mo] | ≤0.15 |
| Nickel [Ni] | ≤0.40 |
| Copper [Cu] | ≤0.40 |
| Vanadium [V] | ≤0.08 |
Mechanical Properties of ASTM A234 WPB
|
Grade |
Tensile Strength, min. | Yield Strength, min. | Elongation %, min | ||
| ksi | ksi | MPa | Longitudinal | Transverse | |
| WPB | 60 | 35 | 240 | 22 | 14 |
ASTM A234 WPB Carbon Steel Elbow Manufacturing Process and Structural Type
Molding technology:
- Hot pressing: High frequency heating pressing, suitable for mass production, surface oxidation requires treatment.
- Cold pressing forming: Small diameter elbows are commonly used, with high precision but requiring annealing to eliminate internal stress.
- Welding elbows: For large diameters, steel plates are rolled and welded, which is low-cost but requires non-destructive testing.
Structural classification:
- Angle: 45 ° (diversion turn), 90 ° (right angle turn), 180 ° (U-shaped return).
- Curvature radius: long radius (1.5D, low flow resistance) vs short radius (1D, compact space).
- Wall thickness grade: Sch40, Sch80, etc., matched with ASME B16.9 wall thickness series.
ASTM A234 WPB Carbon Steel Fitting Elbow Main Application
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Oil and Gas Industry: Low-pressure sections (non-corrosive media) of crude oil, natural gas, and refined oil pipelines.
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Chemical and Petrochemical Industry: Pipelines for public utilities such as water, steam, air, and nitrogen.
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Power Industry: Low-pressure feedwater, circulating water, and fire-fighting water systems in power plants.
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Shipbuilding and Marine Engineering: Ballast water, bilge water, and ventilation pipelines inside ships.
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Building and Municipal Engineering: HVAC systems and district heating pipelines in high-rise buildings.
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