Sweepolet – Detailed Product Introduction
Definition and Structure
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A Sweepolet is a type of “O-let” branch connection fitting (other common types include Weldolet, Sockolet, and Thredolet).
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It is a contoured, integrally reinforced, butt-weld branch connection used to create an outlet from a run pipe (header) to a branch pipe.
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Compared with a traditional Tee fitting, a Sweepolet provides a smoother flow transition and significantly reduces stress concentration on the main pipe.
Its swept and elongated shape offers better reinforcement and longer fatigue life under cyclic loading conditions.
Weldolet — Detailed Product Introduction
Definition & Structure
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A Weldolet is a forged branch-outlet fitting used to create a branch connection from a larger “run” (main) pipe to a smaller (or same size) branch pipe.
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It is typically a butt-weld branch connection: one end is welded to the run pipe, the other end is matched and welded to the branch pipe.
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The run pipe is usually of larger diameter (“header” or “main”), and the Weldolet is welded onto it with a hole and bevel, then the branch pipe is welded into or onto the Weldolet.
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Its design emphasises integral reinforcement (the fitting itself provides strength and reinforcement at the branch junction) and aims to minimise stress concentration at the joint.
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Key Differences Between Sweepolet and Weldolet
| Feature | Weldolet | Sweepolet |
|---|---|---|
| Design Shape | Short, compact with direct weld contour | Long, smooth, sweeping transition |
| Stress Distribution | Suitable for standard pressure pipelines | Provides lower stress concentration at weld junction |
| Fluid Flow Performance | Moderate flow disturbance | Optimized for smooth fluid transition, minimizing turbulence |
| Application Pressure Range | High and medium pressure | Ideal for high-pressure and critical systems |
| Installation | Simple and cost-efficient | Slightly more complex but offers higher performance |
| Best Used In | General oil, gas, and water piping systems | Refineries, power plants, offshore pipelines, and high-temperature |
Applications
Both fittings are widely used in oil & gas, petrochemical, power generation, offshore engineering, and refinery systems — wherever durable and leak-free branch connections are required.
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Weldolet Applications
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Piping systems in refineries and chemical plants
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Process and utility pipelines
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High-pressure gas and steam distribution lines
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Sweepolet Applications
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Critical service pipelines in power stations and offshore platforms
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Long-term fatigue-resistant applications
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Flow-sensitive or high-vibration systems
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Product Advantages
Weldolet Advantages
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Compact structure for easy installation
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Reduced welding time and cost
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High mechanical strength and corrosion resistance
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Standardized dimensions according to ASME B31.3, MSS SP-97
Sweepolet Advantages
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Smooth transition ensures minimal flow disruption
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Lower stress and longer service life in dynamic systems
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Ideal for large-diameter, high-pressure pipeline branches
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Designed and tested for superior fatigue and corrosion resistance
