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Elbow

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Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless
Steel 90 Degree pipe fittings Elbow Stainless

Steel 90 Degree pipe fittings Elbow Stainless

Industrial Nickel Alloy Elbow

Nickel alloy elbows are high-performance pipe fittings specifically engineered for extreme operating conditions, designed to alter pipeline direction. Unlike traditional stainless steel, nickel-based alloys (such as Monel®, Inconel®, and Hastelloy®) deliver exceptional corrosion resistance, outstanding high-temperature strength, and superior resistance to stress corrosion cracking. These properties enable them to maintain exceptional structural integrity and extended service life in demanding environments involving strong acids, strong alkalis, high temperatures and pressures, and chloride-rich conditions. They serve as a reliable safeguard for critical piping systems in chemical, oil and gas, marine, and energy sectors.

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Core Industrial Advantages

Exceptional lifecycle cost: Its unmatched resistance to comprehensive corrosion and stress corrosion cracking enables it to withstand strong acids, alkalis, and chloride environments, significantly reducing leakage, downtime for replacement, and maintenance frequency caused by corrosion. This delivers superior economics throughout its entire lifecycle.

Broad operating adaptability: Possesses outstanding high-temperature strength and thermal stability, maintaining structural integrity and performance across an extensive temperature range from cryogenic to high temperatures. This provides reliable assurance for high-temperature, high-pressure processes in industries such as chemicals and energy.

Enhanced System Safety and Reliability: Superior mechanical properties and fatigue resistance fundamentally strengthen pipeline system integrity under demanding conditions, minimizing safety risks and production interruptions caused by component failure. This makes it a critical component for ensuring continuous, safe production.

Parameter Category

Detailed Specifications & Data

1. Material Grades & Composition

• Alloy 400 / UNS N04400 (Monel® 400)
   - *Ni (~63%), Cu (~28-34%), Fe, Mn*
   - Key Trait: Excellent resistance to seawater, sulfuric & hydrofluoric acid.
• Alloy 600 / UNS N06600 (Inconel® 600)
   - *Ni (~72%), Cr (~14-17%), Fe (~6-10%)*
   - Key Trait: High strength and oxidation resistance at elevated temperatures.
• Alloy 625 / UNS N06625 (Inconel® 625)
   - *Ni (~58%), Cr (~20-23%), Mo (~8-10%), Nb*
   - Key Trait: Superior fatigue strength & pitting resistance; excellent weldability.
• Alloy C-276 / UNS N10276 (Hastelloy® C-276)
   - *Ni (~57%), Mo (~15-17%), Cr (~14.5-16.5%), W*
   - Key Trait: Exceptional resistance to harsh chemicals & oxidizing agents.

2. Design & Manufacturing Standards

• Design & Dimensions: ASME B16.9, ASME B16.28, MSS SP-43, MSS SP-75, DIN 2605, EN 10253
• Material & Manufacturing: ASTM B366 (Covering wrought fittings)
• End Preparation: Beveled ends per ASME B16.25 standard.

3. Size & Dimensional Range

• Nominal Pipe Size (NPS): 1/2" to 48" (DN 15 to DN 1200)
• Wall Thickness Schedule: SCH 5S, 10S, 20, STD, 40, 80, XS, 160, XXS, and custom.
• Bending Angles: Standard: 45°, 90°, 180° (Long & Short Pattern). Custom angles available.
• Center-to-End Radius (Bend Radius):
   - Long Radius (LR): 1.5 x Nominal Diameter (1.5D)
   - Short Radius (SR): 1.0 x Nominal Diameter (1.0D)
   - 3D, 5D, or Custom Radius available for reduced pressure drop.

4. Pressure-Temperature Ratings

Pressure ratings are defined by the ASME B16.34 standard and are material, schedule, and temperature dependent.
Example (for reference):
• Alloy 600, SCH 40, 90° LR Elbow at 500°F (260°C): Pressure Rating ~ 1,200 PSI.
*For precise Pressure-Temperature rating tables for a specific alloy and schedule, please contact our engineering team.

5. Mechanical & Physical Properties

• Tensile Strength: 80 - 130 ksi (550 - 900 MPa), varies by grade & temper.
• Yield Strength (0.2% Offset): 30 - 70 ksi (200 - 500 MPa), varies by grade & temper.
• Elongation: Typically 30% - 50% in 2 inches.
• Hardness: RB 65 - 100 (Brinell 130 - 220), varies by grade.
• Density: ~0.304 lb/in³ (8.4 - 8.9 g/cm³).

6. Performance Characteristics

• Corrosion Resistance: Outstanding resistance to a wide range of acids, alkalis, and salts. Highly resistant to pitting, crevice corrosion, and Chloride Stress Corrosion Cracking (SCC).
• Temperature Range:
   - Cryogenic Service: Suitable down to -425°F (-254°C) without embrittlement.
   - High-Temperature Service: Capable of continuous service up to 1800°F (~980°C) for oxidation-resistant grades like Alloy 600.
• Fabricability: Good weldability using matching filler metals (GTAW/TIG, GMAW/MIG, SMAW).

7. Manufacturing Processes

Seamless (Mandrel formed for superior integrity in high-pressure systems) and Welded (for larger diameters). Solution Annealing & Pickling for optimal corrosion resistance.

8. Quality Assurance & Certification

• Standard Certification: Mill Test Certificates per EN 10204 3.1 / 3.2.
• Traceability: Full heat and lot number traceability.
• Additional NDT: Available upon request (Liquid Penetrant Testing, Radiographic Testing, PMI).
Classification by material system

Monel® series (such as 400, K-500): Renowned for their outstanding resistance to seawater corrosion and salt spray, they are the standard choice for shipbuilding, desalination plants, and offshore platform pipeline systems, effectively resisting erosion and biofouling in Marine environments.

Inconel® series (such as 600, 625, 718): They feature excellent high-temperature strength, oxidation resistance, and creep resistance, and are widely used in high-temperature heat treatment equipment, aero engine pipelines, gas turbine regenerative systems, and other high-temperature and high-pressure environments.

The Hastelloy® series (such as C-276, C-22, X) represents top-notch resistance to comprehensive corrosion, especially to harsh chemical media like strong oxidizing acids and wet chlorine gas. They are the ultimate choice for dealing with the most corrosive environments in the fields of chemical engineering, petroleum refining, and pollution control.

Classification by manufacturing process

Seamless elbow: Made through processes such as hot extrusion or cold pushing, it has no welds throughout and features the best metal fluidity and structural uniformity. It has a high-pressure-bearing capacity and excellent safety, making it the first choice for high-temperature, high-pressure, and highly dangerous fluid transportation systems.

Welded elbow: It is made by rolling and welding nickel alloy plates, and the weld seam must undergo strict non-destructive testing. This process has advantages in terms of economy and large-scale manufacturing, and is suitable for large-diameter, medium, and low-pressure working conditions, such as large-scale flue gas desulfurization (FGD) system pipelines.

Classification by Structure and Size

Bending radius: It is mainly divided into long radius elbows and short radius elbows. Long-radius elbows have a gentler curvature, which can significantly reduce fluid resistance and pressure loss, and are suitable for working conditions where conveying efficiency is pursued. Short-radius elbows are more suitable for use in compact layouts with limited space.

Bending Angle: Standard angles include 45°, 90°, and 180°, which can meet the turning requirements of the pipeline system in different directions. In addition, non-standard angles can also be customized according to the specific engineering design requirements.

Classification by Connection Method

Butt-weld elbow: It forms a permanent high-strength connection with the pipe through bevel welding. It has excellent sealing performance and a smooth flow path, and is a standard configuration for all high-temperature, high-pressure, and absolutely leak-free harsh working conditions.

Socket-welded elbows: They are typically used in small-diameter pipeline systems (such as NPS 2 "and below). Installation is more convenient than butt welding, but their socket structure may pose a risk of crevice corrosion in specific corrosive media, so they should be selected with caution.

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Marine Engineering and Shipbuilding

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Chemical Processing and Petrochemical Industry

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Oil and Gas Industry

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Energy and Power Industry

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Pollution Control and Environmental Protection Engineering

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Technical Selection and Collaborative Engineering Support

Expert Selection Guidance: Our technical team will recommend the most suitable nickel alloy materials (such as Monel, Inconel, Hastelloy) based on your specific medium, concentration, temperature, pressure, and budget, avoiding risks of over-engineering or material mismatch.

Customization Capabilities: We offer flexible customization services covering special dimensions, wall thicknesses, bend radii, and angles to ensure elbows perfectly match your unique piping design and spatial layout.

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Full-Process Quality Assurance and Traceability

Authoritative Certification System: All products come with complete material certificates (MTC/EN 10204 3.1), ensuring traceable material origins and compliance with international standards like ASTM/ASME.

Optional NDT Inspection Services: We provide third-party reports for Radiographic Testing (RT), Ultrasonic Testing (UT), and Liquid Penetrant Testing (PT) per your requirements, offering dual assurance for critical applications.

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Reliable Global Supply Chain and Logistics Support

Stable Inventory and Rapid Response: We maintain safety stock for commonly used nickel alloy elbows, significantly reducing your project delivery lead times.

Professional Cross-Border Logistics Handling: Leveraging extensive international trade experience, we efficiently manage export customs clearance, documentation preparation, and international shipping to ensure safe, on-time delivery to your designated port.

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After-Sales Support and Long-Term Partnership Value

Professional Technical Documentation Support: Clear product identification, installation manuals, and relevant certificates are provided with each shipment to ensure proper installation and usage.

Committed to Becoming Your Strategic Partner: We strive to build lasting relationships with our clients. Beyond offering competitive pricing, we serve as your reliable external supply chain expert, safeguarding your projects every step of the way.

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