EVERBRIGHT

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

• National standard, American standard elbow size

• American standard elbow wall thickness weigh
  

• 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

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.

Elbows are design features as below

A 90 degree elbow is also called a “90 bend” or “90 ell”. It is a fitting which is bent in such a way to produce 90 degree change in the direction of flow in the pipe. It used to change the direction in piping and is also sometimes called a “quarter bend”.

A 90 degree elbow attaches readily to plastic, copper, cast iron, steel and lead. It can also attach to rubber with stainless steel clamps. It is available in many materials like silicone, rubber compounds, galvanized steel, etc. The main application of an elbow (90 degree) is to connect hoses to valves, water pressure pumps, and deck drains. These elbows can be made from tough nylon material or NPT thread.

A 45 degree elbow is also called a “45 bend” or “45 ell”. It is commonly used in water supply facilities, food industrial pipeline networks, chemical industrial pipeline networks, electronic industrial pipeline networks, air conditioning facility pipeline, agriculture and garden production transporting system, pipeline network for solar energy facility, etc.

Elbows are split into two groups which define the distance over which they change direction; the center line of one end to the opposite face. This is known as the "center to face" distance and is equivalent to the radius through which the elbow is bent.

Here below, for example, you will find the center to face distance of NPS 2 elbows (the A distance on the image)

3D elbows as an example, are calculated with: 3(D) x 2(NPS) x 25.4

•  90°-LR : = 1½ x 2(NPS) x 25.4 A=76.2 mm

•  180°-LR : = 2 times the 90° LR elbow A=152.4 mm

• 90°-SR : = 2(NPS) x 25.4 A=50.8 mm

• 180°-SR : = 2 times the 90° SR elbow A=101.6 mm

The center to face distance for a "long" radius elbow, abbreviated LR always is "1½ x Nominal Pipe Size (NPS) (1½D)", while the center to face distance for a "short" radius elbow, abbreviated SR even is to nominal pipe size.

Nominal pipe size		Outside Diameter  at Bevel		Center to End			Center to Center		Back to Faces
				45° Elbows	90°Elbows		180°Return
				H	F		P		K
DN	INCH	Series A	Series B	LR	LR	SR	LR	SR	LR	SR
15	1/2	21.3	18	16	38	-	76	-	48	-
20	3/4	26.9	25	16	38	-	76	-	51	-
25	1	33.7	32	16	38	25	76	51	56	41
32	11/4	42.4	38	20	48	32	95	64	70	52
40	11/2	48.3	45	24	57	38	114	76	83	62
50	2	60.3	57	32	76	51	152	102	106	81
65	21/2	76.1(73)	76	40	95	64	191	127	132	100
80	3	88.9	89	47	114	76	229	152	159	121
90	31/2	101.6	-	55	133	89	267	178	184	140
100	4	114.3	108	63	152	102	305	203	210	159
125	5	139.7	133	79	190	127	381	254	262	197
150	6	168.3	159	95	229	152	457	305	313	237
200	8	219.1	219	126	305	203	610	406	414	313
250	10	273.0	273	158	381	254	762	508	518	391
300	12	323.9	325	189	457	305	914	610	619	467
350	14	355.6	377	221	533	356	1067	711	711	533
400	16	406.4	426	253	610	406	1219	813	813	610
450	18	457.2	478	284	686	457	1372	914	914	686
500	20	508.0	529	316	762	508	1524	1016	1016	762
550	22	559	-	347	838	559
600	24	610	630	379	914	610
650	26	660	-	410	991	660
700	28	711	720	442	1067	711
750	30	762	-	473	1143	762
800	32	813	820	505	1219	813
850	34	864	-	537	1295	864
900	36	914	920	568	1372	914
950	38	965	-	600	1448	965
1000	40	1016	1020	631	1524	1016
1050	42	1067	-	663	1600	1067
1100	44	1118	1120	694	1676	1118
1150	46	1168	-	726	1753	1168
1200	48	1220	1220	758	1829	1219