Short Description

Model No.: ASTM-A403-WP310S-180-Degree-LR-Elbow-8"-SCH40S

China 180 Degree Elbow Manufacturer www.steeljrv.com offers ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow, 8″, SCH40S.

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Key Specifications / Features

Type: 310S 180 Degree LR Elbow
Material: Grade 310S (UNS S31008)
Size: 219mm*8mm (8″ SCH40S)
WT: SCH40S
Standard: ASME B16.9

Grade 310S stainless steel is superior than 304 or 309 stainless steel in most environments, because it has high nickel and chromium content. It has high corrosion resistance and strength in temperatures up to 1149°C (2100°F). The following datasheet gives more details about grade 310S stainless steel.

Chemical composition % of grade 310 and 310S stainless steel

Chemical Composition

310

310S

Carbon

0.25 max

0.08 max

Manganese

2.00 max

2.00 max

Silicon

1.50 max

1.50 max

Phosphorus

0.045 max

0.045 max

Sulphur

0.030 max

0.030 max

Chromium

24.00 – 26.00

24.00 – 26.00

Nickel

19.00 – 22.00

19.00 – 22.00

Mechanical properties of of grade 310/310S stainless steel

Mechanical Properties

310/ 310S

Grade 0.2 % Proof Stress MPa (min)

205

Tensile Strength MPa (min)

520

Elongation % (min)

40

Hardness (HV) (max)

225

Physical properties of grade 310/310S stainless steel

Properties

at

Value

Unit

Density

 

8,000

Kg/m3

Electrical Conductivity

25°C

1.25

%IACS

Electrical Resistivity

25°C

0.78

Micro ohm.m

Modulus of Elasticity

20°C

200

GPa

Shear Modulus

20°C

77

GPa

Poisson’s Ratio

20°C

0.30

 

Melting Rnage

 

1400-1450

°C

Specific Heat

 

500

J/kg.°C

Relative Magnetic Permeability

 

1.02

 

Thermal Conductivity

100°C

14.2

W/m.°C

Coefficient of Expansion

0-100°C

15.9

/°C

 

0-315°C

16.2

/°C

 

0-540°C

17.0

/°C

Fabrication of Grade 310/310S Stainless Steel

Fabrication Grades 310/310S are forged in the temperature range 975 – 1175°C. Heavy work is carried out down to 1050°Cand a light finish is applied to the bottom of the range. After forging annealing is recommended to relieve all stresses from the forging process. The alloys can be readily cold formed by standard methods and equipment.

Machinability of Grade 310/310S Stainless Steel

Machinability Grades 310/310S are similar in machinability to type 304. Work hardening can be a problem and it is normal to remove the work hardened layer by using slow speeds and heavy cuts, with sharp tools and good lubrication. Powerful machines and heavy, rigid tools are used.

Welding of Grade 310/310S Stainless Steel

Welding Grades 310/310S are welded with matching electrodes and filler metals. The alloys are readily welded by SMAW (manual), GMAW (MIG), GTAW (TIG) and SAW. Electrodes to AWS A5.4 E310-XX and A 5.22 E310T-X, and filler metal AWS A5.9 ER310 are used. Argon is shielding gas. Preheat and post heat are not required, but for corrosion service in liquids full post weld solution annealing treatment is essential. Pickling and passivation of the surface to remove high temperature oxides are essential to restore full aqueous corrosion resistance after welding. This treatment is not required for high temperature service, but welding slag should be thoroughly removed.

Heat Treatment of Grade 310/310S Stainless Steel

Heat Treatment Type 310/310S are solution annealed by heating to temperature range 1040 -1065°C, holding at temperature until thoroughly soaked, then water quenching.

Heat Resistance of Grade 310/310S Stainless Steel

Grades 310/310S have good resistance to oxidation in intermittent service in air up to 1035°Cand 1050°Cin continuous service. The grades are resistant to oxidation, sulphidation and carburisation.

Available Forms of Grade 310/310S Stainless Steel

Austral Wright Metals can supply these grades as plate, sheet and strip, bar and rod, seamless tube and pipe, welded tube and pipe, forgings and forging billet, tube and pipe fittings, wire. Corrosion Resistance Grade 310/310S is generally not used for corrosive liquid service, although the high chromium and nickel content give corrosion resistance superior to grade 304. The alloy does not contain molybdenum, so pitting resistance is quite poor. Grade 310/310S will be sensitised to intergranular corrosion after service at temperatures in range 550 – 800°C. Chloride stress corrosion cracking may take place in corrosive liquids containing chlorides at temperatures exceeding 100°C.

China 180 Degree Elbow Manufacturer www.steeljrv.com offers ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow, 8″, SCH40S.

ASME B16.9 Butt weld 180 degree Short radius Elbow Dimensions

180 deg short redius dimen - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

ASME B16.9 180 degree Short radius Elbow Dimensional Tolerance

NPS O.D.
D
180° Short radius 180° Short Radius
Center to
Center
O
Back to
Face
K
Center to
Center
O
Back to
Face
K
1/2 21.3 76 48
3/4 26.7 76 51
1 33.4 76 56 51 41
42.2 95 70 64 52
48.3 114 83 76 62
2 60.3 152 106 102 81
73 190 132 127 100
3 88.9 229 159 152 121
101.6 267 184 178 140
4 114.3 305 210 203 159
5 141.3 381 262 254 197
6 168.3 457 313 305 237
8 219.1 610 414 406 313
10 273 762 518 508 391
12 323.8 914 619 610 467
14 355.6 1067 711 711 533
16 406.4 1219 813 813 610
18 457 1372 914 914 686
20 508 1524 1016 1016 762
22 559 1676 1118 1118 838
24 610 1829 1219 1219 914

ASME B16.9 180° Short Radius Elbow Dimensional Tolerance

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 ….. ….. …..

ASME B16.9 Butt weld 180 degree Long Radius Elbow Dimensions

180 deg long redius dimen - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

NPS O.D. D 180° Long Radius
Center to Center
O
Back to Face
K
1/2 21.3 76 48
3/4 26.7 76 51
1 33.4 76 56
42.2 95 70
48.3 114 83
2 60.3 152 106
73 190 132
3 88.9 229 159
101.6 267 184
4 114.3 305 210
5 141.3 381 262
6 168.3 457 313
8 219.1 610 414
10 273 762 518
12 323.8 914 619
14 355.6 1067 711
16 406.4 1219 813
18 457 1372 914
20 508 1524 1016
22 559 1676 1118
24 610 1829 1219

ASME B16.9 180° Long Radius Elbow Dimensional Tolerance

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 ….. ….. …..

Most elbows are available in short radius or long radius variants.

SHORT RADIUS ELBOWS

The short radius elbows have a center-to-end distance equal to the Nominal Pipe Size (NPS) in inches, while the long radius is 1.5 times the NPS in inches. Short elbows are widely available, and are typically used in pressurized systems.

LONG RADIUS ELBOWS

Long elbows are typically used in low-pressure gravity-fed systems and other applications where low turbulence and minimum deposition of entrained solids are of concern.


Seamless Steel Elbow VS Welded Steel Elbow

Difference in appearance

The biggest difference between seamless elbows and welded elbows is the presence or absence of welds, but many weld elbows are now polished from the weld before leaving the factory, and many exporters sell such fake seamless elbows to customers. Even if the weld is polished, experienced customers can still distinguish it with the naked eye: the thickness of the seamless elbow is not uniform with respect to the thickness of the weld elbow. Currently, the false seamless elbow often appears in the area below the diameter DN600.

Differences in molding process

The process of using seamless steel pipes and welded steel pipes is the same process. The difference is that the welding elbows are made of sheet steel, by bending and different welding processes.

Differences in performance and usage

The seamless steel pipe elbow has better pressure bearing capacity and higher strength than the welded steel elbow. Therefore, it is widely used in high-voltage equipment, heat, boilers and other industries. Generally, the weld of the welded steel elbow is a weak point, and the quality affects the overall performance. In general, welded steel elbows can reduce working pressure by 20% compared to seamless steel elbows. This reliability is the main reason why people choose seamless steel elbows. In fact, all industrial pipes are finished with seamless pipe elbows because the elbows are subjected to extreme thermal, chemical and mechanical loads. In the aerospace, automotive and electronics industries with relatively low budgets, welding elbows are more popular, as are the working pressures on the pipeline.

Differences in available sizes

For most seamless steel elbow manufacturers in China, they produce original seamless pipe elbows with a maximum outer diameter of 24 inches and 609.6 mm. In contrast, welded steel pipe elbows do not have these limitations and can range in size from 1-1 / 2 inch 48.3mm to 100 inch 2540mm.

Different prices

Because the seamless manufacturing process is more complicated, the price is more expensive than the seamed elbow, and the seam is mainly made of steel plate (steel strip) for secondary welding, which is cheaper and more widely used.

How to Guarantee the Quality of 180 Degree Elbow?

We will do strictly inspection as below step:

  • Visual the surface of 180 degree LR elbow body.
  • Check the marking: “ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8″ SCH40S″.
  • Measure the dimensions. Such as diameter, thickness, height from center to end.
  • Test material chemical composition of 180 degree LR elbow.

How to Protect the Surface of 180 Degree Elbow?

  • Hot Dipped Galvanized
  • Cold Galvanized
  • Black Primer
  • PE Coated

How to calculation weight of elbow

20210415003857 61232 - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

In a piping system, the elbow is a pipe fitting that changes the direction of the pipe. According to the angle, there are 45 ° and 90 ° 180 ° three kinds of the most commonly used, according to the project also includes 60 ° and other non-normal angle elbow. Elbow materials are cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, nonferrous metals and plastics.
Elbow weight calculation formula:

Ring volume = 2X3.14X3.14 (r ^ 2) R

  • r – radius circle
  • R – radius of gyration of the ring
  • Hollow tube ring volume = 2X3.14X3.14 ((r^2) – (r’^2)) R
  • r’- circle radius of the inner circle

90,60,45 degree elbow (elbow), respectively corresponding to the volume of the hollow tube ring volume of 1/4, 1/6, 1/8.
The density of steel engineering calculations by weight 7.85 kg / dm, density X volume = weight (mass).
Note:

  • 1. 180 ° elbow calculated by the table 2 times, 45 ° by 1/2;
  • 2. R1.0DN elbow weight calculated according to Table 2/3;
  • 3. The table does not list the weight of the wall thickness, preferably with the similar two weight calculation of the average;
  • 4. 90 ° elbow calculation formula; 0.0387 * S (D-S) R / 1000 where S = wall thickness mm D = diameter mm R = bending radius mm.

Manufacturing process of the pipe elbow

Mandrel method (Hot Forming)

  • One of the most common Pipe Fittings Manufacturing Process for manufacturing Elbows Or Pipe Bends from the pipe is mandrel method which is kind of hot forming methods.
  • In this method, the pipe is cut in pieces and push with the help of hydraulic ram. It is pushed over a die called “mandrel” which allows the pipe to expand and bend simultaneously.
  • This method can be used to manufacture a wide range of the diameter of elbows or pipe bends
  • 20180104100126 45592 - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S
  • ELBOWS Or Pipe Bends Mandrel method

Extrusion Method

In cold Extrusion method, a pipe with the same diameter as finished product is pushed through a die and formed into its desired shape. Usually applied to stainless steel small to medium sizes elbows or pipe bends.

20180104100215 30422 - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

Extrusion Method

UO Method

UO method is used to manufacture medium size of the elbow, tee, and reducers. The plate is cut out into a specially designed shape, it is formed first into a U-shape using a die and then into an O-shape or tubular form using another die, that is why this method is known as UO method. Once the fittings formed in tumbler shaped it is welded from inside and outside of the closing seam. A cut plate is 1st from in U shape and then in O shape.

20180104100303 36471 - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

UO Method

Hot Forming Method

In a Hot Forming Die Bending method, a Pipe is heated to forming temperature & formed in the die with the specific shape, this process may be repeated as needed to obtain the required shape, size and wall thickness. Usually applied to thick-wall items that cannot be bent on a mandrel die.

20180104100406 54259 - ASME B16.9 ASTM A403 WP310S 180 Degree LR Elbow 8" SCH40S

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