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3. ASME B16.9 fittings

45˚ Elbow Long

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Description

45˚ Elbow Long is a pipe fitting used to change the flow direction of liquid or gas in a piping system. Its bending angle is 45 degrees and its bending radius is 1.5 times the nominal diameter of the pipe, so it is called “long radius”.

Applications

  • Used in industrial piping systems to redirect flow without causing great pressure.
  • Widely used in petroleum, chemical, food, pharmaceutical, and many other industries.

Standards

The ASME B16.9 standard includes dimensional requirements, tolerances, materials, and other provisions to ensure product integrity. Other technical standards include ASTM, ANSI and MSS SP-43 for stainless steel and other alloy fittings.

Size

Common sizes for the 45˚ Elbow Long include diameters from 1/2 inch to 48 inches or larger depending on the specific requirements of the system.

Dimensional parameters of interest include nominal diameter (NPS), pipe thickness (schedule), and bending radius.

Material

  • Carbon Steel: ASTM A234 WPB, ASTM A106 Grade B, ASTM A53 Grade B
  • Stainless Steel: ASTM A403 WP304, WP304L, WP316, WP316L, WP321, WP321H, WP347, WP347H
  • Alloy Steel: ASTM A234 WP1, WP5, WP9, WP11, WP22, WP91
  • Duplex and Super Duplex Stainless Steel: ASTM A815 UNS S31803 (Duplex 2205), ASTM A815 UNS S32750 (Super Duplex 2507)
  • Nickel Alloys: ASTM B366 UNS N04400 (Monel 400), ASTM B366 UNS N06625 (Inconel 625), ASTM B366 UNS N08825 (Incoloy 825)
  • Titanium Alloys: ASTM B363 WPT2, WPT12
  • Aluminum Alloys: ASTM B361 6061
  • Copper Alloys: ASTM B61 (Bronze), ASTM B62 (Brass)

ASME B16.9 45˚ Elbow Long Thicknesses (Schedule).

45˚ Elbow Long fittings to ASME B16.9 can be manufactured in a variety of thicknesses to suit pressure and temperature requirements in various applications. Below are common thicknesses (Schedule):

Popular Thicknesses (Schedules).

  • SCH 5S
  • SCH 10S
  • SCH 20
  • SCH 40S (STD – Standard)
  • SCH 60
  • SCH 80S (XS – Extra Strong)
  • SCH 100
  • SCH 120
  • SCH 140
  • SCH 160
  • XXS (Double Extra Strong)

Dimensions and Thickness of 45˚ Elbow Long according to ASME B16.9

NPS

(Inch)

OD

(mm)

SCH 5S

(mm)

SCH 10S

(mm)

SCH 20

(mm)

SCH 40S (STD)

(mm)

SCH 80S (XS)

(mm)

SCH 120

(mm)

SCH 160

(mm)

XXS

(mm)

1/2 21.3 1.65

2.11

2.41 2.77 3.73
3/4 26.7 1.65 2.11 2.41 2.87 3.91
1 33.4 1.65 2.77 3.38 3.38 4.55
1 1/2 48.3 1.65 2.77 3.68 3.68 5.08
2 60.3 1.65 2.77 3.91 3.91 5.54 7.11
2 1/2 73.0 2.11 3.05 5.16 5.16 7.01 7.47
3 88.9 2.11 3.05 5.49 5.49 7.62 9.27
3 1/2 101.6 2.11 3.05 5.74 5.74 8.08 9.52
4 114.3 2.11 3.05 6.02 6.02 8.56 11.13
5 141.3 2.77 3.40 6.55 6.55 9.53 12.70
6 168.3 2.77 3.40 7.11 7.11 10.97 15.09 18.26 21.95
8 219.1 2.77 3.76 8.18 8.18 12.70 19.05 23.01 26.57
10 273.0 3.40 4.19 9.27 9.27 15.09 22.23 28.58 32.51
12 323.8 3.96 4.57 9.53 10.31 17.48 25.40 33.32 37.49
14 355.6 3.96 4.78 9.53 11.13 19.05 28.58 36.53
16 406.4 4.19 4.78 9.53 12.70 21.44 30.96 40.49
18 457.2 4.19 4.78 9.53 14.27 23.83 34.29 44.45
20 508.0 4.78 5.54 9.53 15.09 26.19 38.10 48.26
22 558.8 5.54 6.35 9.53 15.88 28.58 41.15 53.98
24 609.6 6.35 6.35 9.53 17.48 31.75 44.45 59.54

Material summary table of 45˚ Elbow Long according to ASME B16.9 standard

MATERIAL STANDARD MECHANICAL PROPERTIES APPLICATION
Carbon steel ASTM A234 WPB Tensile strength: 415-585 MPa Oil and gas pipeline, industrial water system
Stainless Steel ASTM A403 WP304/316 Tensile strength: 485-700 MPa Chemicals, food, pharmaceuticals
Alloy steel ASTM A234 WP5/WP9 Tensile strength: 415-585 MPa High temperature, high pressure
Copper ASTM B61/B62 Tensile strength: 205-275 MPa Water supply system, HVAC
Aluminum ASTM B241/B345 Tensile strength: 140-310 MPa Air conditioning and heat conduction system
PVC/CPVC plastic ASTM D2466/D2846 Tensile strength: 34-55 MPa Water supply and drainage system, light chemicals

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