180 degree Long Radius Elbow

For all fittings				180° Returns
Nominal Pipe Size (NPS)	Outside Ø  at Bevel	Inside Ø at End	Wall Thickness  t / t1	Center to Center Dim. O	Back to Face Dim. K	Align- ment of Ends U
1/2 a 2 1/2	1	0,8	Not	7	7	1
3 a 3 1/2	1	1,6	less	7	7	1
4	+2 -1	1,6	than	7	7	1
5 a 6	+3 -1	1,6	87,50%	7	7	1
8	2	1,6	of nominal	7	7	1
10	+4 -3	3,2	thickness	7	7	2
12 a 18	+4 -3	3,2		10	7	2
20 a 24	+6 -5	4,8		10	7	2
26 a 30	+7 -5	4,8		.....	.....	.....
32 a 48	+7 -5	4,8		.....	.....	.....

An elbow is a pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, usually a 180° or 90° angle, though 45° elbows are also made. The ends may be machined for butt welding (SW) or socketed welding(SW) etc.

Most elbows are available in short radius or long radius variants. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow.

Elbows are categorized based on various design features as below:

• Long Radius (LR) Elbow is also called LR elbow – means the radius is 1.5 times the pipe diameter
  • L/R 45°Elbow: Long radius 45 degree elbow changes the direction by 45 degrees.
  • L/R 90°Elbow: Long radius 90 degree elbow changes the direction by 90 degrees.
  • L/R 180°Elbow: Long Radius 180 degree return bend allows complete reversal of flow.
• Short Radius (SR) Elbow is also called SR elbow, – means the radius is 1.0 times the pipe diameter
  • Short radiu 45°Elbow: Short radius 45° elbow changes the direction by 45 degrees.
  • Short radius 90°Elbow: Short Radius 90° elbow is same as LR90 except for the measurement between end of elbow to center line is 1 x NPS.
  • Short radius 180° Elbow: Short Radius 180° return bend allows complete reversal of flow

Size range:

• Seamless elbow: 1/2"-24" DN15-DN600
  
• Welding elbow: 6"-72" DN150-DN1800
• Wall thickness: Sch5-Sch160 XXS
• 国标、美标弯头尺寸
• 美标弯头壁厚重量
• External arc length of elbow

Recommended type of pipe elbows:

• Big diameter elbows
  
• Larg diameter elbow
  
• Small size elbow
  
• Forged Elbow, Elbow Fittings
  

Materials

• Carbon steel: ASTM/ASME A234 WPB-WPC
  
• Alloy steel: --WP 22-WP 5-WP 91-WP 911
  • ASTM A335 P22
  • ASME SA335 P91 elbow
  • ASTM A234 WP 11
• Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
  
• High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70
• Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N
  • ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti
    
  • ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
    

Abrasion resistant elobw

SHS-self-propagating ceramic composite steel pipe and fittings, the new generation of wearable and corrosion resistant engineering pipeline, belongs to "863" Hi-tech Plan products.

• Ceramic Lined Elbows
  • 22.5 degree ceramic lined elbow
    
  • 45 degree ceramic lined elbow
    
  • 90 degree ceramic lined elbow
• Ceramic Tile lined elbows
  
• Backpack wear-resistant ceramic lined elbow
  
• Rare Earth Wear Resistant alloy Elbow
  

It is the ideal wearable and corrosion resistant engineering pipeline, with wear resistance 15 times higher than common steel pipe, smooth inner surface, and favorable liquor resistance.

Butt Weld Pipe Fitting Bevel

• All welded pipe fittings have bevelled end to allow for ease of welding.
• This bevel allows for full penetration weld in most cases.
• There are two types of bevels;
  Plain Bevel and Compound Bevel: according to the bevel of welding pipe fittings construction .
• ASME B16.28, Buttwelding Short Radius Elbows and Returns

Industrial Processes: Bending, squeezing, pressing, forging, machining and more ANSI/ASME B16.25, Buttwelding Ends
ANSI/ASME B16.25 Standard covers the preparation of butt welding ends of piping components to be joined into a piping system by welding.

Application of pipe elbows:

Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, etc.

ELL & ELLS

• A wing of a building at right angles to the main structure.
• A right-angled bend in a pipe or conduit; an elbow.

管件标准及相关参数:

Fitting specification, Standard and identification

There are different varieties of pipe fittings made of various materials and available in various shapes and sizes.