15CrMoG Bending

15CrMoG Bending

Seamless 15crmog Alloy Steel Pipe Bends For High-pressure Industrial Applications

15crmog pipe bending involves shaping seamless alloy steel pipes into bends (e.

15CrMoG Bending

Seamless 15crmog Alloy Steel Pipe Bends For High-pressure Industrial Applications

15crmog pipe bending involves shaping seamless alloy steel pipes into bends (e.g., 3d, 5d, 7d, or 180° u-bends) for high-pressure, high-temperature applications. 15crmog, a chromium-molybdenum heat-resistant steel, contains approximately 0.15% carbon, chromium, and molybdenum, offering exceptional high-temperature strength (up to 550°c), oxidation resistance, and corrosion resistance.

15CrMoG Pipe Bending
15CrMoG Bend
15CrMoG pipe bend GB5310
15CrMoG exhaust pipe bending
15CrMoG alloy steel pipe bending
15CrMoG seamless pipe bending

15CrMoG Pipe Bending for High-Temperature, Corrosion-Resistant Boiler Piping

15CrMoG Pipe Bending involves shaping seamless alloy steel pipes into bends (e.g., 3D, 5D, 7D, or 180° U-bends) for high-pressure, high-temperature applications. 15CrMoG, a chromium-molybdenum heat-resistant steel, contains approximately 0.15% carbon, chromium, and molybdenum, offering exceptional high-temperature strength (up to 550°C), oxidation resistance, and corrosion resistance. Compliant with standards like GB5310 and GB9948, these bends are ideal for boiler pipeline protection in industries such as power generation, petrochemical, nuclear power, and chemical processing.

Manufactured through hot induction bending or cold-forming, 15CrMoG pipe bends are available in sizes from 6mm to 219mm (outer diameter) with wall thicknesses from 0.6mm to 22mm, and bend radii of 3D, 5D, 7D, or custom. They exhibit tensile strength (≥590 MPa), yield strength (≥350 MPa), elongation (≥17%), and hardness (135-195 HB), ensuring durability in harsh environments.

15CrMoG pipe bends support welding, though thick-walled pipes (≥16mm) require careful welding to avoid thermal cracking. Rigorous testing, including chemical analysis, tensile testing, flattening tests (no cracks at H=0.7D), and nondestructive methods (radiographic, ultrasonic), ensures quality. The chromium content forms a dense oxide film, enhancing corrosion resistance, while coatings like FBE or passivation further protect against rust and chemical exposure.

With a density of approximately 7.85 g/cm³ and thermal conductivity of 45 W/(m·K) at 20°C, 15CrMoG pipe bends are lightweight yet robust, ideal for high-pressure boilers (working pressure ≥9.8 MPa, temperature 450°C–650°C), heat exchangers, economizers, superheaters, and reheaters. Their smooth interior surfaces minimize flow resistance, making them suitable for boiler pipeline protection, refinery piping, cooling coils, and structural applications like handrails and sign frames.

For engineers seeking reliable high-temperature piping solutions, 15CrMoG pipe bends deliver unmatched strength, erosion resistance, and longevity, addressing challenges like pipeline corrosion and thermal stress in demanding industrial environments.

15CrMoG Pipe Bend Specifications
Specification Details
Standards GB5310, GB9948, ASME B16.9
Material 15CrMoG (Chromium-Molybdenum Alloy Steel)
Sizes 6mm to 219mm (Outer Diameter)
Wall Thickness 0.6mm to 22mm
Bend Radius 3D, 5D, 7D, or Custom
Angles 90°, 45°, 30°, 180° (U-Bends), or Custom
Manufacturing Hot Induction Bending, Cold-Forming, Forging
Coatings FBE, Passivation
Testing Chemical Analysis, Tensile (≥590 MPa), Flattening (H=0.7D), Radiographic, Ultrasonic
Mechanical Properties Tensile: ≥590 MPa, Yield: ≥350 MPa, Elongation: ≥17%, Hardness: 135-195 HB
Operating Conditions Pressure: ≥9.8 MPa, Temperature: 450°C–650°C
Chemical Composition of 15CrMoG
Element Composition (%)
Carbon (C) 0.12-0.18
Silicon (Si) 0.17-0.37
Manganese (Mn) 0.40-0.70
Phosphorus (P) ≤0.025
Sulfur (S) ≤0.025
Chromium (Cr) 0.80-1.10
Molybdenum (Mo) 0.40-0.55
Mechanical Properties of 15CrMoG
Property Value
Tensile Strength, min (MPa) 440-640
Yield Strength, min (MPa) 235
Elongation, min (%) 21
Hardness, max (HBW) 190

Bends vs Elbows Comparison

Pipe Bends
  • Radius: More than 2D (3D, 5D, 10D)
  • Manufacturing: Custom-made on-site
  • Flow: Smoother, less pressure drop
  • Cost: Generally lower cost
  • Applications: Large radius requirements
Pipe Elbows
  • Radius: 1D to 2D (standardized)
  • Manufacturing: Pre-manufactured fittings
  • Flow: Sharp corners, higher pressure drop
  • Cost: Higher due to manufacturing
  • Applications: Standard 45° and 90° angles

Common Bend Radii

3D Bends

Radius is three times the nominal diameter. Compact design for space-limited applications.

Moderate Flow
5D Bends

Radius is five times the nominal diameter. Optimal balance of flow and space requirements.

Smooth Flow
10D Bends

Radius is ten times the nominal diameter. Maximum flow efficiency with minimal pressure drop.

Optimal Flow
Radius Calculation Example

For a 10-inch diameter pipe with a 5D bend:

Centerline Radius = 5 × 10 inches = 50 inches

The radius calculation helps determine the space requirements and flow characteristics of the bend.

Materials & Grades

Material Type Grades & Standards
Stainless Steel ASTM A403 WP Gr. 304, 304L, 304H, 309, 310, 316, 316L, 316Ti, 317L, 321, 347, 347H, 904L
Carbon Steel ASTM A 234 WPB, WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70
Low-Temperature Carbon Steel ASTM A420 WPL3, A420 WPL6
Alloy Steel ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
Duplex & Super Duplex Steel ASTM A815, ASME SA 815 UNS 31803, UNS 32205 (Dual Certified)
Delivery

15CrMoG Bending Applications

The 15CrMoG Bending are used in the following industries:

  • Oil & Gas
  • Steel
  • Power Generation
  • Chemical Processing
  • Petrochemicals
  • Metallurgy
  • Water treatment and distribution
  • Shipbuilding
  • Construction

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