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Short Radius Elbow

Short Radius Elbow

Seamless Alloy Steel Sr Elbows For Compact Industrial Systems

Discover short-radius elbows designed for corrosion resistance and space-constrained industrial piping.

Short Radius Elbow Boiler Pipeline Protection Corrosion Resistance Industrial Piping +2 More

Short Radius Elbow

Seamless Alloy Steel Sr Elbows For Compact Industrial Systems

Discover short-radius elbows designed for corrosion resistance and space-constrained industrial piping. our seamless alloy steel sr elbows ensure durability and efficiency in compact systems.

Short Radius Elbow Boiler Pipeline Protection Corrosion Resistance Industrial Piping +2 More

Short Radius Elbow for Space-Saving Piping Solutions

Short Radius Elbow

Short Radius Elbow fittings are essential for industrial piping systems where space is limited, offering a compact design with a bending radius equal to the pipe diameter (R=1D). Compliant with ASME B16.9 standards, our seamless alloy steel SR elbows provide corrosion resistance and erosion resistance, making them suitable for boiler pipeline protection in refineries, petrochemical plants, and power generation facilities.

Produced through hot-rolling, cold-drawing, or extrusion processes, these seamless alloy elbows are heat-treated to optimize mechanical properties. With high chromium (4.00-6.00%) and molybdenum (0.45-0.65%) content, they offer excellent resistance to oxidation and wear from corrosive fluids, gases, and abrasive slurries in industrial piping. Available in 90°, 45°, and 22.5° angles, SR elbows are ideal for low-pressure systems or tight pipeline configurations.

Our short radius elbows support welding, bending, and flanging, with recommended preheating (150-200°C) and post-weld heat treatment (650-700°C) to ensure weld integrity. Available in sizes from 1/2” to 24” (DN15 to DN600) and wall thicknesses from SCH 40 to SCH 160, they meet diverse piping needs. Rigorous testing, including tensile, flattening, and hydrostatic tests, ensures reliability in conditions up to 650°C.

Enhanced with coatings like 3LPE or FBE, these elbows provide superior corrosion resistance, making them suitable for oil and gas pipelines, chemical processing, and pneumatic conveying systems. Compared to long-radius elbows, SR elbows are more compact but have higher pressure loss, making them ideal for applications where space is a priority over flow efficiency.

For engineers seeking space-saving industrial piping solutions, our short radius elbows deliver durability, safety, and cost-effectiveness, addressing challenges like pipeline corrosion and thermal stress in compact systems.

Comparison of Short Radius Alloy Elbow with Other Fittings
Feature SR Alloy Elbow LR Alloy Elbow Stainless Steel Elbow
Material Type Ferritic Alloy Steel Ferritic Alloy Steel Stainless Steel
Bending Radius 1D 1.5D 1.5D or 1D
Temperature Range High (up to 650°C) High (up to 650°C) High (up to 870°C)
Corrosion Resistance Excellent (High Cr/Mo) Excellent (High Cr/Mo) Superior (Austenitic)
Erosion Resistance Good Excellent Moderate
Applications Tight Spaces, Low Pressure Boilers, Petrochemical, Refineries Food Processing, Marine
Pressure Loss High Low Low to Moderate
Key Advantage Compact design Smooth flow, high-temp corrosion resistance Superior corrosion resistance

Key Benefits

Corrosion Resistance

High chromium content ensures protection against rust and corrosive fluids.

Erosion Resistance

Durable alloy steel withstands wear from abrasive slurries.

Boiler Pipeline Protection

Suitable for compact boiler systems and industrial applications.

Weldability

Supports welding and bending for flexible pipeline configurations.

Cost-Effective

Compact design reduces material and installation costs.

Space-Saving

Compact 1D radius fits tight pipeline configurations.

You Can Also Search Short Radius Elbows by

A curated list of long-tail keywords for short-radius alloy elbows, covering specifications, applications, and material properties.

Standards and Specifications
  • • ASME B16.9 short radius elbow standards
  • • Short radius elbow corrosion resistance specs
  • • Seamless alloy SR elbow ASME B16.9 properties
  • • Industrial piping SR elbow standards
Applications
  • • Short radius elbows for boiler pipeline protection
  • • Seamless SR elbows for petrochemical industry
  • • Industrial piping SR elbows for oil and gas
  • • Compact SR elbows for power plants
  • • Corrosion-resistant SR elbows for chemical processing
Material and Grades
  • • Seamless alloy short radius elbow material
  • • Corrosion-resistant SR elbow alloy grades
  • • High-temperature SR elbow properties
Manufacturing and Testing
  • • Short radius elbow manufacturing process
  • • SR elbow non-destructive testing
  • • Corrosion-resistant SR elbow heat treatment
  • • Industrial piping SR elbow quality testing
Procurement and Suppliers
  • • Short radius elbow suppliers
  • • Boiler pipeline protection SR elbow distributors
  • • Corrosion-resistant SR elbow price
Dimensions and Customization
  • • Short radius elbow dimensions
  • • Industrial piping SR elbow tolerances
  • • Custom seamless SR elbow sizes

Note: ASME B16.9 covers short-radius alloy elbows for compact, corrosion-resistant applications. Contact a certified supplier for detailed specifications.

FAQ

A short radius elbow (SR elbow) is a pipe fitting with a bending radius equal to the pipe diameter (R=1D), designed for compact industrial piping systems. It offers corrosion resistance and is suitable for boiler pipeline protection in space-constrained applications.

An SR elbow (R=1D) is more compact but has higher pressure loss compared to a Long Radius (LR) elbow (R=1.5D). SR elbows are ideal for low-pressure, space-constrained systems, while LR elbows suit high-pressure boiler pipeline protection with smoother flow.

SR elbows are commonly available in 90°, 45°, and 22.5° angles, with 60° and 120° options for specialized industrial piping systems, ensuring flexibility in tight configurations.

A 5D elbow has a bending radius five times the pipe diameter, offering minimal flow resistance and erosion resistance for abrasive materials. SR elbows (R=1D) are more compact but have higher pressure loss, suitable for space-limited industrial piping.

SR elbows are made from: - Alloy Steel: ASTM A234 WP5, WP9, WP11 for boiler pipeline protection.
- Stainless Steel: ASTM A403 WP 304, 316 for corrosion resistance.
- Carbon Steel: ASTM A234 WPB for cost-effective strength.
- Duplex Steel and Nickel Alloys for extreme conditions.

SR elbows are produced via hot-rolling, cold-drawing, or extrusion, followed by heat treatments like normalizing or quenching to ensure corrosion resistance and strength for industrial piping.

Quality is ensured through: - Back Arc Thickness: Measured with a thickness gauge to detect thinning (typically 2mm less than the mouth).
- Dimensional Checks: Inner/outer diameters and center height.
- Radiographic Inspection: Detects defects like pores or slag inclusions.
- Testing: Tensile, flattening, and hydrostatic tests per ASME B16.9.

SR elbows (R=1D) are compact, ideal for tight spaces in low-pressure systems. While they have higher pressure loss than LR elbows, they offer cost-effective corrosion resistance for space-constrained industrial piping.

Coatings include: - Light oiling
- Black painting
- FBE coating
- 2/3-layer PE coating
- Hot-dip galvanizing
These enhance corrosion resistance for boiler pipeline protection.

Calculate the back arc length: L = D * 3.14 (D = pipe diameter). For carbon steel: Weight (kg) = (D * a * 0.02466 * L) / 1000, where a is wall thickness. For stainless steel, use 0.02491. This ensures accurate sizing for industrial piping.

Types of Short Radius Elbow Based on Connection with Pipe

Butt Welded Elbow

Formed by hot pressing or forging, directly welded to pipe with beveled ends for full penetration weld. Suitable for high pressure & high temperature pipelines.

Socket Welded Elbow

Features a socket at the end where the pipe is inserted before welding. The actual end diameter is slightly larger than pipe OD for proper fit.

Threaded Elbow

Similar to socket weld elbows but with threads inside for easy installation & removal. Ideal for repair and maintenance work in low/medium pressure pipelines.

Types of Short Radius Elbow Based on Material of Construction

Stainless Steel

ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L

Carbon Steel

ASTM A234 WPB, WPBW, WPHY 42, 46, 52, 60, 65, 70

Low Temp Carbon Steel

ASTM A420 WPL3, A420 WPL6

Alloy Steel

ASTM / ASME A/SA 234 Gr. WP 1, 5, 9, 11, 12, 22, 91

Duplex Steel

ASTM A815 / ASME SA815, UNS S31803, S32205, Werkstoff No. 1.4462

Nickel Alloy

ASTM / ASME SB336: UNS 2200 (Nickel 200), 2201 (Nickel 201), 4400 (Monel 400), 8020 (Alloy 20), 8825 (Inconel 825), 6600 (Inconel 600), 6601 (Inconel 601), 6625 (Inconel 625), 10276 (Hastelloy C276)

Pipe Fitting Standards & Dimensions

Pipe fitting dimensions are in either metric or Standard English. Common fittings include 90° long radius, 45° elbows, and 180° return bends. LR and SR elbows are widely used in heating and cooling units.

  • B16.1 – Cast Iron Pipe Flanges and Flanged Fittings
  • B16.3 – Malleable Iron Threaded Fittings
  • B16.5 – Pipe Flanges and Flanged Fittings
  • B16.11 – Forged Steel Fittings, Socket-Welding and Threaded
  • B16.25 – Buttwelding Ends
  • B16.36 – Orifice Flanges

  • ASTM A105 – Carbon Steel Forgings for Piping Applications
  • ASTM A234 – Piping Fittings of Wrought Carbon Steel & Alloy Steel
  • ASTM A403 – Wrought Austenitic Stainless Steel Fittings
  • ASTM A420 – Low-Temperature Service Fittings

  • AWWA C110 – Ductile-Iron and Gray-Iron Fittings
  • AWWA C208 – Fabricated Steel Water Pipe Fittings

  • MSS SP-43 – Wrought Stainless Steel Butt-Welding Fittings
  • MSS SP-75 – High Test Wrought Buttwelding Fittings
  • MSS SP-83 – Steel Pipe Unions, Socket-Welding and Threaded
  • MSS SP-97 – Reinforced Forged Branch Outlet Fittings

  • BSP – British Standard Pipe (BSPT & BSPP threads)
  • JIS – Japanese Industrial Standards
  • NPT – National Pipe Thread (U.S. standard tapered & straight)
  • ISO – International Organization for Standardization
  • ANSI – Assigns schedule numbers & wall thickness classification
Codes

Define requirements for design, fabrication, materials, tests, and inspection of piping systems.

Standards

Provide design and construction rules for pipe fittings, adapters, flanges, sleeves, elbows, tees, valves, etc.

Factors Affecting Standards
  • Pressure-temperature ratings
  • Size & Dimensions
  • Design & Tolerances
  • Materials & Coatings
  • End connections & Threading
  • Marking & Pattern taper
Bolts & Nuts for Flanges
  • A193 – Alloy & stainless steel bolting for high temperature/pressure
  • A320 – Alloy & stainless bolting for low temperature service
  • A194 – Standard for nuts in multiple material types
  • AN – U.S. Army-Navy standard fittings (measured in 1/16″ increments)
  • Dash Size – Inside diameter reference, e.g., “-8” = AN 8 fitting

Materials & Standards

Common Materials
Carbon Steel A234 WPB (A & C available)
High Yield Carbon Enhanced strength properties
Stainless Steel 304, 316 (SCH 10 common)
Nickel Alloys Specialized applications
Standards & Specifications
ASME B16.9 Factory-Made Wrought Steel
ASME B16.28 Short Radius Elbows
ASME B16.25 Buttwelding Ends
MSS SP-97 Welding End Standards
Butt Weld Pipe Fitting Bevel Overview

Plain Bevel and Compound Bevel

Bevel of

Butt Weld Pipe Fitting

All welded pipe fittings have beveled ends to allow for ease of welding. This bevel allows for full penetration weld in most cases.

Welding Bevel acc. to

  • ASME B16.9, Factory-Made Wrought Steel Buttwelding Fittings
  • ASME B16.28, Buttwelding Short Radius Elbows and Returns
  • ANSI/ASME B16.25, Buttwelding Ends
  • MSS SP-97, Socket Welding, Threaded, and Buttwelding Ends

Butt weld pipe fitting bevels provide reliable, high-strength connections for demanding industrial piping applications.

Wide variety for all areas of application Across DIN, EN, and ASME Standards (For Pipes/Fittings/Flanges)
DIN Standard
German Industrial Standard 		EN Standard
European Norm (CEN) 		ASME Standard
American Society of Mechanical Engineers
Low-Carbon & Low-Temp Steel
  • • St 35.8 I / III
  • • St 35 N
  • • St 52.0 / 52.4
 Low-Carbon & Low-Temp Steel
  • • P235GH-TC1 / TC2
  • • P215NL / P265NL
  • • P355N / NL1 / NH
 Low-Carbon & Low-Temp Steel
  • • WPB (ASTM A234, general use)
  • • WPL3 / WPL6 (ASTM A420, low-temp)
Low-Alloy High-Strength Steel
  • • (No direct grade, referenced to EN)
 Low-Alloy High-Strength Steel
  • • L360NB / L360NE (API 5L, pipeline steel)
 Low-Alloy High-Strength Steel
  • • WPHY 52 (API 5L, high-pressure transmission)
Molybdenum Steel (High-Temp)
  • • 15 Mo 3
 Molybdenum Steel (High-Temp)
  • • 16Mo3 (EN 10028, ≤530°C service)
 Molybdenum Steel (High-Temp)
  • • (No direct equivalent; referenced to WP11)
Cr-Mo Steel (Medium Cr Content)
  • • 13 CrMo 4 4
  • • 10 CrMo 9 10
 Cr-Mo Steel (Medium Cr Content)
  • • 13CrMo4-5 (≤540°C service)
  • • 10CrMo9-10 (≤540°C service)
 Cr-Mo Steel (Medium Cr Content)
  • • WP5 / WP9 (ASTM A234, 5%/9% Cr)
  • • WP11 / WP22 (ASTM A234, 1.25%/2.25% Cr)
High Cr-Mo-V Steel (Super High-Temp)
  • • (No direct grade, referenced to EN)
 High Cr-Mo-V Steel (Super High-Temp)
  • • X10CrMoVNb9-1 (EN 10216-2, ≤600°C service)
 High Cr-Mo-V Steel (Super High-Temp)
  • • WP91 / WP92 (ASTM A335, 9% Cr, ≤650°C service)
Key Notes on Grade Equivalence
  • • Equivalence Logic: Grades are grouped by alloy composition (Cr, Mo, V) and service performance (temp/pressure resistance), not exact "one-to-one" matches—mechanical properties (tensile strength, impact toughness) may vary slightly between standards (e.g., DIN St 35.8 ≈ EN P235GH ≈ ASME WPB, but yield strength differs by ±10 MPa).
  • • Standard Scope: - DIN/EN grades cover European pipes/fittings (EN 10216 for seamless pipes, EN 10028 for plates); - ASME grades (WP-series) are defined in ASTM A234 (fittings), A335 (pipes), A182 (flanges) for American systems.
  • • Application Considerations: For cross-standard projects (e.g., European equipment with American pipes), verify maximum service temperature (e.g., EN 16Mo3 ≈ ASTM WP11, but 16Mo3 is limited to 530°C vs. WP11 to 593°C) and corrosion resistance (e.g., L360NB for oil pipelines vs. WPHY 52 for offshore transmission) to avoid mismatches.
  • • Unmatched Grades: Some grades (e.g., DIN 15 Mo 3) have no direct ASME equivalent—use "reference grades" (e.g., WP11) and consult material test reports (MTRs) to confirm compliance with project requirements.
Short Radius Elbow

Industries Using

Short Radius Elbow Applications

Short Radius Elbow components that are used to connect, join, or adapt different parts of a system, such as pipes, tubes, or hoses. They serve multiple purposes, including:

  • Fitting Connection
  • Directional Changes
  • Size Adaptation
  • Water Treatment
  • Branching
  • Valve and Control
  • Pressure Control
  • System Maintenance
  • Connection to Equipment

The choice of fittings depends on the specific requirements of the system, including factors like the type of fluid or gas, pressure, temperature, and the layout of the piping or tubing system.

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