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Steel Pipe Elbow
Introduction
Steel pipe elbows form the backbone of modern piping systems, redirecting flow with precision and reliability. At Hebei Longrun Pipeline Group Company, our portfolio of steel pipe elbows encompasses a broad spectrum of specifications, addressing the rigorous demands of oil refineries, chemical processing, power plants, and infrastructure projects worldwide.
Material Grades and Properties
Our steel pipe elbows are produced in the following material grades:
ASTM A234 WPB: Standard carbon steel for general applications.
ASTM A420 WPL6: Low-temperature carbon steel for cryogenic uses.
ASTM A403 WP304/304L/316/316L: Stainless steel for corrosion resistance and cleanliness.
ASTM A860 WPHY 42/46/52/60/65/70: High-strength steel for elevated pressure pipelines.
Each grade is selected based on chemical compatibility, temperature range, and mechanical load requirements, ensuring elbows maintain integrity under cyclic stresses and thermal expansion.
Dimensional Standards
Steel pipe elbows are manufactured to conform with ASME B16.9 dimensions, guaranteeing interchangeability and seamless integration. Key parameters include:
Center-to-Face Lengths: Adhering to precise measurements for 1D, 1.5D, and 2D long-radius elbows and compact short-radius variants.
Wall Thickness: Matching pipe schedules (10, 20, 40, 80, XXS) to ensure fluid transfer without compromise.
Orientation and Marking: Clear directional markings and heat number stamps facilitate correct installation and traceability.
Forming Methods
Hot Induction Bending: Produces smooth, uniform bends by heating targeted sections and forming under controlled bends.
Cold Pressing: Ideal for small-diameter and thin-walled pipes, maintaining precise angles without heat input.
Segment Welding: Employed for large-diameter elbows where individual segments are cut, beveled, welded, and formed into a continuous curve.
Surface Finishes
To support diverse customer requirements, steel pipe elbows may be supplied with:
Pickled and Oiled: Removes mill scale and offers basic corrosion resistance.
Polished (2B, BA): Enhances surface smoothness for sanitary applications.
Galvanized: Provides zinc-coated protection for outdoor or humidity-prone installations.
Bare Mill Finish: Suitable for onsite painting or specialized coating systems.
Applications
Oil & Gas Downstream: Routing refined products and ensuring minimal pressure drop in piping networks.
Petrochemical Facilities: Handling high-temperature feedstock and corrosive byproducts.
Thermal Power Stations: Managing steam cycles and cooling water loops.
Municipal Utilities: Water distribution and wastewater treatment pipelines.
Pulp & Paper Mills: Transporting chemicals, steam, and process water under variable temperatures.
Quality Control and Certification
Hebei Longrun’s quality management system follows ISO 9001 guidelines, with full production traceability. We offer third-party inspections, including radiographic and ultrasonic testing, to verify weld integrity. Mechanical test certificates and compliance declarations accompany each batch.
Technical Support and Logistics
Our engineering team provides detailed piping isometric reviews, stress analysis consultation, and installation best practices. With strategically located warehouses and partnerships in key regions, Hebei Longrun ensures timely delivery and competitive freight options.
Conclusion
By combining advanced forming technologies, rigorous quality assurance, and extensive technical expertise, Hebei Longrun Pipeline Group Company delivers steel pipe elbows engineered for performance, safety, and longevity across global piping systems.
