China Long Radius Elbow Manufacturers Suppliers Factory - Customized Long Radius Elbow

Your Professional Long Radius Elbow Supplier

Long radius butt weld elbows are supplied in carbon steel, stainless steel, alloy steel, and selected special grades for industrial piping systems.

Our long radius elbows are available in common 45°, 90°, and 180° configurations, featuring a 1.5D centerline radius, precise wall thicknesses, and specified material grades. Production covers both seamless and welded constructions according to size, material, and project requirements.

Large Diameter Long Radius Elbow
Baode Pipe Fittings supplies large diameter long radius elbows for industrial piping systems where pipe size, wall thickness, center-to-end dimensions and material grade must match project specifications.
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Sch 80 Long Radius Elbow
Supply of Schedule 80 long radius elbows covers carbon steel, alloy steel, and stainless steel for industrial piping systems. Standard configurations include 90° and 45° long radius elbows with butt-weld ends, produced to the specified
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ASTM A234 WP22 Long Radius Elbow
ASTM A234 WP22 Long Radius Elbows are chromium-molybdenum alloy steel butt-weld fittings engineered for high-temperature and high-pressure piping systems. The WP22 grade contains controlled chromium and molybdenum additions to prevent
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ASTM A403 WP316L Long Radius Elbow
The ASTM A403 WP316L Long Radius Elbow is specified for process, utility, and pressure piping systems where corrosion resistance, chloride durability, and controlled welding dimensions are mandatory.
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ASTM A403 WP316 Long Radius Elbow
ASTM A403 WP316 Long Radius Elbows are wrought austenitic stainless steel butt-weld fittings designed to change the direction of process and pressure piping while maintaining a standardized long-radius geometry.
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ASTM A403 WP304 Long Radius Elbow
ASTM A403 WP304 Long Radius Elbows are wrought austenitic stainless steel pipe fittings engineered to change piping direction by 45 or 90 degrees while maintaining a smooth, low-turbulence flow transition in industrial fluid systems.
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Detailed Technical Specifications

Parameter Category	Specification Details
Size Range	NPS 1/2 inch to 24 inch (larger sizes evaluated upon request)
Bending Radius	Long Radius (LR) equals 1.5 times nominal pipe size (1.5D)
Angle Options	45 degree, 90 degree, 180 degree, and custom angles
Wall Thickness Schedules	SCH 10S, SCH 20, SCH 40, SCH 80, SCH 160, XXS, and custom millimeter walls
Carbon Steel Materials	ASTM A234 WPB, WPC, ASTM A420 WPL6
Stainless Steel Materials	ASTM A403 WP304, WP304L, WP316, WP316L, WP321, WP347
Alloy Steel Materials	ASTM A234 WP11, WP22, WP5, WP9, WP91
Dimensional Standards	ASME B16.9, ASME B16.28, MSS SP-43
End Preparation	Beveled ends with root face per ASME B16.9 requirements
Surface Protections	Black anti-rust paint, clear protective oil, shot blasting, pickling passivation

Why Choose Us

Manufacturing Capability and Equipment Base

Production floors operate with three specialized elbow pushing machines, hydraulic press units, precision CNC lathes, and advanced machining centers. This dedicated equipment enables stable manufacturing of seamless and slotted long radius elbows across a wide dimensional range

Rigorous Quality Control Protocols

Factory verification processes cover wall thickness uniformity at the extrados and intrados, centerline-to-end tolerances, angle accuracy, and non-destructive examination when specified. Each component undergoes strict dimensional inspection before final surface treatment and packaging.

Global Export and Project Experience

Export operations serve industrial piping distributors, stockists, and contractors across more than 40 countries and regions. Supply chain execution covers standard stock fulfillment as well as custom project specifications backed by ISO 9001, ISO 14001, and ISO 45001 management systems.

Materials and Grades

Material selection must align with the operating medium, temperature, pressure, corrosion environment, and applicable piping specification.

Carbon Steel

Common grades include ASTM A234 WPB, WPC, and ASTM A420 WPL6 for low-temperature applications. Deployed extensively in oil and gas pipelines, power generation, and water treatment.

Stainless Steel

Typical austenitic grades include ASTM A403 WP304/304L, WP316/316L, WP321, and WP347. Specified where fluid corrosiveness or process cleanliness requires high alloy content.

Alloy Steel

Typical grades include WP11, WP22, WP5, WP9, and WP91 (ASTM A234). Engineered for high-pressure and elevated-temperature service in power generation and heavy chemical processing.

Dimensional Tolerances and ASME B16.9 Compliance

Procuring industrial pipe fittings requires strict adherence to dimensional tolerances to ensure proper alignment and weld fit-up on site.

According to ASME B16.9, key geometrical tolerances that must be controlled during manufacturing include:

Center-to-End Dimension: Tolerance limits for 45 and 90 degree elbows based on nominal pipe size (NPS).

Alignment of Ends: Ensuring perpendicularity between end faces and the centerline axis.

Wall Thickness Tolerance: The minimum wall thickness at any point must not fall below the nominal wall thickness minus the allowable manufacturing under-tolerance (typically negative 12.5 percent).

End Preparation: Beveled ends (37.5 degrees plus or minus 2.5 degrees) with a root face (1.6 mm plus or minus 0.8 mm) for standard butt-welding configurations.

Manufacturing Process and Equipment Fact Base

Long radius elbows require controlled thermal and mechanical forming to maintain consistent cross-sectional geometry and uniform wall-thickness distribution.

The standard production workflow comprises:

Raw Material Preparation -> Cutting -> Heating & Hot Forming -> Sizing -> Heat Treatment (When Required) -> End Beveling -> Surface Treatment -> Dimensional Inspection -> Stacking & Packaging

For hot-formed elbows, tubular blanks are heated to the specified forming temperature and pushed over a mandril horn using specialized hydraulic pushing equipment to achieve the correct 1.5D radius and angle. Subsequent sizing ensures dimensional accuracy, followed by heat treatment where mandated by the material standard.

Production floors feature specialized elbow pushing machines, hydraulic press machines, CNC lathes, and precision machining centers.

Quality Control and Inspection Protocols

Dimensional conformity, geometrical tolerance, and material traceability govern the quality of industrial pipe fittings. Inspection protocols follow applicable product standards and project quality plans.

Typical verification items include:

Material chemical composition analysis and mechanical property testing (tensile and hardness)
Wall thickness verification at the extrados, intrados, and body
Outside diameter and centerline-to-end dimensions
Angle accuracy and radius verification
End bevel and root face dimensions
Surface condition and visual examination
Heat treatment batch records and Nondestructive examination (NDT) when specified
Material Test Certificate (MTC) validation per EN 10204 3.1

Testing scopes align with ASTM and ASME standards, supplemented by specific purchase order requirements or inspection and test plans (ITP).

Standards, Compliance, and Industry Applications

Long radius elbows integrate into industrial piping networks where standardized butt-weld dimensions and structural reliability are mandatory.

Applicable Standards: ASME B16.9, ASTM A234, ASTM A403, ASTM A420, and ASTM A815.

Typical Applications: Oil and gas transmission pipelines, petrochemical processing facilities, chemical manufacturing plants, power generation stations, high-pressure steam distribution, water treatment utilities, and shipbuilding systems.

Surface Treatment, Packaging, and Logistics Protection

To prevent atmospheric corrosion during ocean transit and long-term storage, finished elbows undergo controlled surface treatments and secure packaging:

Surface Finishes

Anti-rust black painting, transparent rust-preventive oil coating, shot blasting, or pickling passivation (for stainless steel grades).

Protective Caps

Plastic bevel protectors applied to both ends to prevent damage to weld bevels during handling.

Packaging Solutions

Fumigation-free wooden pallets, heavy-duty wooden crates, or steel-banded bundles designed for international export and container loading.

FAQ

Q: What are the critical parameters required to accurately identify and quote a long radius elbow?

A: Purchasing an industrial long radius elbow requires defining the nominal pipe size, schedule or exact wall thickness, angle configuration such as 45 or 90 degrees, centerline radius type, exact material grade, and the applicable manufacturing standard like ASME B16.9. Providing these technical variables ensures that the quoted components match the required system design parameters.

Q: How does the manufacturing method affect the lead time and performance of the fitting?

A: Seamless long radius elbows are formed directly from tubular blanks, making them standard for high-pressure and critical process lines. Welded elbows are fabricated from plate or welded pipe, which is typically evaluated for larger nominal sizes or specific project schedules. Understanding whether your piping specifications permit welded construction helps streamline production planning and delivery schedules.

Q: What documentation and material traceability standards are provided with each shipment?

A: Every production batch is accompanied by a Material Test Certificate conforming to EN 10204 3.1. This documentation includes chemical composition analysis, mechanical property test results, dimensional inspection reports, and heat treatment records to ensure full material traceability from raw steel to the finished fitting.

As one of the leading long radius elbow manufacturers and suppliers in China, we warmly welcome you to wholesale customized long radius elbow made in China here and get pricelist from our factory. For price consultation, contact us.

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