Titanium Flanges

ASTM B381 Ti Grade 2 Blind Flange and Gr F5 Titanium Weld Neck Flange manufacturer in UAE


Titanium Flanges

Titanium Flanges Types Based on Flange Facing

An example of a titanium flange is ASTM B381 Titanium Flanges. It is intended to transfer loads to the pipe to lower excessive stress levels at the titanium flange base. Titanium Flanges known as a titanium slip-on flange slips over the tip of steel piping before being welded in position.

Which Should You Use: Titanium Grade 2 Flanges or Titanium Grade 5 Flanges?

It is frequently used to alloy other metals and is a component of fighter jets and nuclear power plant pipes. Although a transition element, it is regarded for its many economically pure grades, including Titanium Grade 2 Flanges. Perhaps the excellent strength-to-weight ratio attracts buyers from all over the world to titanium. Or it might be the excellent corrosion-resistant qualities of titanium. A flange's heaviness may be uncomfortable for both the application and the person using it. It is common practice to clean, repair, and examine a piping system using Grade 5 Blind Flanges.

ASTM B381 Titanium Blind Flanges Corrosion Resistance

Grade 2 is likely the most used of the four economically available ASTM B381 Titanium Blind Flanges in various industrial uses. It's since the Asme Sb 381 F2 Threaded Flanges meet industry standards for high flexibility and corrosion resistance. Not all industrial parts are created in a straight line; some must be molded to fit the machinery. Here is where the object's flexibility is valuable.

manufacturer of UNS R56400 Slip On Flange and DIN 11853 Titanium Grade 2 Socket Weld Flanges in Dubai, browse our range of Class 150-2500 Titanium Threaded/ Plate Flange online

Ordering Information Of Ti Slip On Flange

The Titanium SORF Flange can be seen as a fundamental component of many systems due to its excellent tensile hardness. Although titanium is sturdy metal, its industrially pure grade levels, grade 1 through grade 4, is ductile and gentle. Many providers across demanding sectors may favor using a titanium-based alloy or a carbon steel substitute when selecting flanges for uses. You can order Ti Slip On Flange online as well.

supplier & exporter of ASME Sb381 Ti Spectacle Blind Flanges with Final visual inspection, Advantages & Disadvantages Of EN 1092-1 Titanium Grade 2 Flanges




Specialized in manufacturing

Titanium Flanges

Titanium Flange Is A Part Made Of Non-ferrous Metal Titanium Or Titanium Alloy To Connect Pipes With Each Other, Which Is Connected To The Pipe End.

Size

1/2 Inches To 48 Inches

Class

150 To 2500

Schedule

SCH 10S To SCH 80S

ASME

B16.5
ASTM B381 Titanium Flanges


Two Properties : Titanium Grade 2 & 5 Flanges



Advantages Of Titanium Grade 2 Flanges
Advantages Of Titanium Grade 2 Flanges
  • Non-toxic
  • Low thermal expansion
  • High melting point
  • Excellent fabrication possibilities
  • Strength
  • Resistance to corrosion
Disadvantages Of Titanium Grade 5 Flanges
Disadvantages Of Titanium Grade 5 Flanges
  • It is not suited in high-temperature ranges, above 400 degrees Celsius
  • It is incredibly important to use the right cutting tools and speeds and feeds during machining
  • Does have negative externalities which require mitigation
Steel Vs Titanium
Steel Vs Titanium
  • Titanium becomes dramatically stronger than many steels. In terms of sheer strength
  • Titanium alloys beat low to medium grade stainless steels
  • Titanium is far superior, as it is as strong as steel but 45% lighter.
  • Titanium has the highest strength-to-weight ratio of all known metals.

ASTM B381 Titanium Flange Specification


Specifications Titanium Flanges
Methods Of Forging Casting
Forging
Rolling
Cutting
JIS Standard 5K/ 10K/ 16K 20K/ 30K/ 40K/ 63K
Manufacturing Productivity 800 ton per month
Supply Ability 500 Ton Per Month
Face Type RF (Raised Face), RTJ (Ring Type Joint)
Available Packing Packing In Plywood Box And Plywood Pallet
Size 1/2” to 24” (customized diameters: up to 60”.)
Payment Type L/C,T/T,D/P,Paypal
Equipment Pushing Machine
Press machine
electric bevelling machine
Class Class 150 to 2500. PN 2.5 to PN 250.
EN Standard 6Bar/ 10Bar/ 16Bar/ 25Bar/ 40Bar
Brand Name Schulzmann
Certificate ISO
Supporting Material For Flanges Gasket/ Ring Joint/ Flanges Bolts
Use In Marine & dredging
Sanitation
Process Instrumentation
Oil and Gas
Petrochemical/ Refinery/Chemical
Power etc.
Transportation In Air & Ocean and Land
DIN Standard PN6/ PN10/ PN16/ PN25/ PN40/ PN64
Testing Hydrostatic testing machine
Magnetic particle detector
Direct-reading Spectrograph
UI trasonic flaw detector


titanium flanges manufacturer in UAE


Titanium Flanges At Best Price


Description Price In US ($)
TITANIUM FLANGE 2 INCH, WNRF, 150#, SCH 40 US $641.50 Per KG
TITANIUM FORGED FLANGE - DIA 300 X 80MM US $1187.16 Per KG
TITANIUM FORGED FLANGE - DIA 140 X 32MM US $229.77 Per KG
TITANIUM FORGED FLANGE - DIA 170 X 30MM US $383.98 Per KG
Ti FLANGE, SORF SB381 GR 2 25 NB X 150# US $127.18 Per KG
Ti GR 2, CIRCULAR FLANGE OD 864/ID 511*6MM THK US $577.67 Per KG
Ti GR 2, CIRCULAR FLANGE OD 615/ID 40*6MM THK US $280.95 Per KG
Ti GR 2, CIRCULAR FLANGE, 737 MM OD X 511MM ID X 6MM THK US $266.15 Per KG
Ti GR 2, CIRCULAR FLANGE 615 MM ODX40MM ID X 6MM THK US $182.56 Per KG


Available Of Titanium Forged Flanges



manufacturer of ASME B16.5 Titanium Threaded Flanges In UAE and B381 F2 Orifice Flanges Pressure Temperature Rating & Gr 5 Titanium Lap Joint Flange Composition


Titanium Flange Pressure Temperature Rating


*For Class 75, Class 150 and Class 300.

Temperature
°F
Working Pressure by Classes, psi
Class 75 Class 150 Class 300
-20~100 145 290 750
200 130 260 745
300 115 230 665
400 100 200 615
500 85 170 580
600 70 140 555
650 60 125 545
700 - 110 540
750 - 95 530


*For Class 400, Class 600 and Class 900.

Temperature
°F
Working Pressure by Classes, psi
Class 400 Class 600 Class 900
-20~100 1000 1500 2250
200 990 1490 2230
300 890 1335 2000
400 820 1230 1845
500 775 1160 1740
600 740 1115 1670
650 730 1095 1640
700 725 1085 1625
750 710 1065 1595


*For Class 1500 and Class 2500.

Temperature
°F
Working Pressure by Classes, psi
Class 1500 Class 2500
-20~100 3750 6250
200 3720 6200
300 3335 5560
400 3070 5120
500 2905 4840
600 2785 4640
650 2735 4560
700 2710 4520
750 2660 4430


Titanium Pipe Flanges For Sale


Titanium Grade 2 Blind Flange

Titanium Grade 2 Blind Flange

Titanium Grade 5 Slip On Flange

Titanium Grade 5 Slip On Flange

ASTM B381 Gr F2 Weld Neck Flange

ASTM B381 Gr F2 Weld Neck Flange

Titanium Threaded Flanges

Titanium Threaded Flanges

Ti RTJ Flanges

Ti RTJ Flanges

B381 F2 Orifice Flanges

B381 F2 Orifice Flanges

Grade 2 Titanium Spectacle Blind Flanges

Grade 2 Titanium Spectacle Blind Flanges

Gr 5 Titanium Plate Flanges

Gr 5 Titanium Plate Flanges

ASME SB 381 Gr F2 Reducing Flange

ASME SB 381 Gr F2 Reducing Flange

Titanium Exhaust Flanges

Titanium Exhaust Flanges

Titanium Maf Flanges

Titanium Maf Flanges

Titanium V Band Flanges

Titanium V Band Flanges



Titanium Flanges Bolts


Class 150 Flanges Class 300 Flanges Class 600 Flanges
NPS # Studs And Bolts Diameter of Studs or Bolts Stud Length # Studs and Bolts Diameter of Studs and Bolts Stud Length # Studs and Bolts Bolts and Studs Diameetr Stud Length
1/16 Raised Face Ring Type Joint 1/16 Raised Face Ring Type Joint 1/4 Raised Face Ring Type Joint
1/2 4 0.50 2-1/4 4 0.50 2-1/2 3 4 0.50 3 3
3/4 4 0.50 2-1/2 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1 4 0.50 2-1/2 3 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1-1/4 4 0.50 2-3/4 3-1/4 4 0.63 3-1/4 3-3/4 4 0.63 3-3/4 3-3/4
1-1/2 4 0.50 2-3/4 3-1/4 4 0.75 3-1/2 4 4 0.75 4-1/4 4-1/4
2 4 0.63 3-1/4 3-3/4 8 0.63 3-1/2 4 8 0.63 4-1/4 4-1/4
2-1/2 4 0.63 3-1/2 4 8 0.75 4 4-1/2 8 0.75 4-3/4 4-3/4
3 4 0.63 3-1/2 4 8 0.75 4-1/4 4-3/4 8 0.75 5 5
3-1/2 8 0.63 3-1/2 4 8 0.75 4-1/4 5 8 0.88 5-1/2 5-1/2
4 8 0.63 3-1/2 4 8 0.75 4-1/2 5 8 0.88 5-3/4 5-3/4
5 8 0.75 3-3/4 4-1/4 8 0.75 4-3/4 5-1/4 8 1.00 6-1/2 6-1/2
6 8 0.75 4 4-1/2 12 0.75 4-3/4 5-1/2 12 1.00 6-3/4 6-3/4
8 8 0.75 4-1/4 4-3/4 12 0.88 5-1/2 6 12 1.13 7-1/2 7-3/4
10 12 0.88 4-1/2 5 16 1.00 6-1/4 6-3/4 16 1.25 8-1/2 8-1/2
12 12 0.88 4-3/4 5-1/4 16 1.13 6-3/4 7-1/4 20 1.25 8-3/4 8-3/4
14 12 1.00 5-1/4 5-3/4 20 1.13 7 7-1/2 20 1.38 9-1/4 9-1/4
16 16 1.00 5-1/4 5-3/4 20 1.25 7-1/2 8 20 1.50 10 10
18 16 1.13 5-3/4 6-1/4 24 1.25 7-3/4 8-1/4 20 1.63 10-3/4 10-3/4
20 20 1.13 6-1/4 6-3/4 24 1.25 8 8-3/4 24 1.63 11-1/4 11-1/2
24 20 1.25 6-3/4 7-1/4 24 1.50 9 10 24 1.88 13 13-1/4


What Is Titanium Flanges Used For


What Is Titanium Flanges Used For


Diameter Of Grade 2 Titanium Plate Flange


NPS In Inch Diameter Bore Diameter Of B.C. Diameter Of Bolt Bolt Holes Thickness Of Flanges Weight In LBS/ Kilogram
Slip On Flange Blind Flange
Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter # Inch Millimeter lb Kilogram lb Kilogram
1/2 15 3.50 88.90 0.88 22.35 2.38 60.33 0.50 12.70 4 0.38 9.53 0.48 0.22 0.51 0.23
3/4 20 3.88 98.43 1.09 27.69 2.75 69.85 0.50 12.70 4 0.38 9.53 0.59 0.27 0.65 0.29
1 25 4.25 107.95 1.36 34.54 3.13 79.38 0.50 12.70 4 0.38 9.53 0.70 0.32 0.79 0.36
1-1/4 32 4.63 117.48 1.70 43.18 3.50 88.90 0.50 12.70 4 0.38 9.53 0.81 0.37 0.95 0.43
1-1/2 40 5.00 127.00 1.95 49.53 3.88 98.43 0.50 12.70 4 0.38 9.53 0.94 0.43 1.12 0.51
2 50 6.00 152.40 2.44 61.98 4.75 120.65 0.63 15.88 4 0.38 9.53 1.33 0.60 1.62 0.73
2-1/2 65 7.00 177.80 2.94 74.68 5.50 139.70 0.63 15.88 4 0.50 12.70 2.44 1.11 2.99 1.36
3 80 7.50 190.50 3.57 90.68 6.00 152.40 0.63 15.88 4 0.50 12.70 2.64 1.20 3.46 1.57
3-1/2 90 9.00 228.60 4.57 116.08 7.50 190.50 0.63 15.88 8 0.50 12.70 3.70 1.68 4.90 2.22
4 100 10.00 254.00 5.66 143.76 8.50 215.90 0.75 19.05 8 0.63 15.88 4.95 2.24 7.50 3.40
5 125 11.00 279.40 6.72 170.69 9.50 241.30 0.75 19.05 8 0.63 15.88 5.58 2.53 9.20 4.17
6 150 13.50 342.90 8.72 221.49 11.75 298.45 0.75 19.05 8 0.63 15.88 8.01 3.63 14.00 6.35
8 200 16.00 406.40 10.88 276.35 14.25 361.95 0.88 22.23 12 0.75 19.05 12.00 5.44 24.50 11.11
10 250 19.00 482.60 12.88 327.15 17.00 431.80 0.88 22.23 12 0.75 19.05 17.50 7.94 33.50 15.19


Bore Diameter Of Class 150 Titanium Gr 2 Flange


NPS In Inch O.D. Of Flanges Thickness Of Flanges Hub Dia. At Base Diameter Of Raised Face Hub Dia. At Welding Point Welding Neck Slip On Welding Neck Slip On
Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter Inch Millimeter
1/2 15 3.50 88.90 0.44 11.11 1.19 30.16 1.38 34.93 0.84 21.34 0.62 15.75 0.88 22.35 1.88 47.63 0.63 15.88
3/4 20 3.88 98.43 0.50 12.70 1.50 38.10 1.69 42.86 1.05 26.67 0.82 20.83 1.09 27.69 2.06 52.39 0.63 15.88
1 25 4.25 107.95 0.56 14.29 1.94 49.21 2.00 50.80 1.32 33.53 1.05 26.67 1.36 34.54 2.19 55.56 0.69 17.46
1-1/4 32 4.63 117.48 0.63 15.88 2.31 58.74 2.50 63.50 1.66 42.16 1.38 35.05 1.70 43.18 2.25 57.15 0.81 20.64
1-1/2 40 5.00 127.00 0.69 17.46 2.56 65.09 2.88 73.03 1.90 48.26 1.61 40.89 1.95 49.53 2.44 61.91 0.88 22.23
2 50 6.00 152.40 0.75 19.05 3.06 77.79 3.63 92.08 2.38 60.45 2.07 52.58 2.44 61.98 2.50 63.50 1.00 25.40
2-1/2 65 7.00 177.80 0.88 22.23 3.56 90.49 4.13 104.78 2.88 73.15 2.47 62.74 2.94 74.68 2.75 69.85 1.13 28.58
3 80 7.50 190.50 0.94 23.81 4.25 107.95 5.00 127.00 3.50 88.90 3.07 77.98 3.57 90.68 2.75 69.85 1.19 30.16
3-1/2 90 8.50 215.90 0.94 23.81 4.81 122.24 5.50 139.70 4.00 101.60 3.55 90.17 4.07 103.38 2.81 71.44 1.25 31.75
4 100 9.00 228.60 0.94 23.81 5.31 134.94 6.19 157.16 4.50 114.30 4.03 102.36 4.57 116.08 3.00 76.20 1.31 33.34
5 125 10.00 254.00 0.94 23.81 6.44 163.51 7.31 185.74 5.56 141.22 5.05 128.27 5.66 143.76 3.50 88.90 1.44 36.51
6 150 11.00 279.40 1.00 25.40 7.56 192.09 8.50 215.90 6.63 168.40 6.07 154.18 6.72 170.69 3.50 88.90 1.56 39.69
8 200 13.50 342.90 1.13 28.58 9.69 246.06 10.63 269.88 8.63 219.20 7.98 202.69 8.72 221.49 4.00 101.60 1.75 44.45
10 250 16.00 406.40 1.19 30.16 12.00 304.80 12.75 323.85 10.75 273.05 10.02 254.51 10.88 276.35 4.00 101.60 1.94 49.21
12 300 19.00 482.60 1.25 31.75 14.38 365.13 15.00 381.00 12.75 323.85 12.00 304.80 12.88 327.15 4.50 114.30 2.19 55.56
14 350 21.00 533.40 1.38 34.93 15.75 400.05 16.25 412.75 14.00 355.60 13.25 336.55 14.14 359.16 5.00 127.00 2.25 57.15
16 400 23.50 596.90 1.44 36.51 18.00 457.20 18.50 469.90 16.00 406.40 15.25 387.35 16.16 410.46 5.00 127.00 2.50 63.50
18 450 25.00 635.00 1.56 39.69 19.88 504.83 21.00 533.40 18.00 457.20 17.25 438.15 18.18 461.77 5.50 139.70 2.69 68.26
20 500 27.50 698.50 1.69 42.86 22.00 558.80 23.00 584.20 20.00 508.00 19.25 488.95 20.20 513.08 5.69 144.46 2.88 73.03
24 600 32.00 812.80 1.88 47.63 26.13 663.58 27.25 692.15 24.00 609.60 23.25 590.55 24.25 615.95 6.00 152.40 3.25 82.55


Titanium Grade 5 Flanges Chemical Composition


Element Content (%)
Oxygen, O ≤ 0.20
Carbon, C ≤ 0.080
Titanium, Ti 87.6 - 91
Aluminum, Al 5.5 - 6.75
Vanadium, V 3.5 - 4.5
Iron, Fe ≤ 0.40
Nitrogen, N ≤ 0.050
Hydrogen, H ≤ 0.015


Grade 2 Titanium Flanges Mechanical Properties


Grade Yield Strength (0.2%Offset) Elongation Density Melting Point Tensile Strength
Titanium Grade 2 Psi – 39900 , MPa – 275 20 % 4.5 g/cm3 1665 °C (3030 °F) Psi – 49900 , MPa – 344


ASME Sb381 Ti Slip On Flanges Equivalent


STANDARD UNS WERKSTOFF NR.
Titanium Grade 2 Flanges R50400 3.7035
Titanium Grade 5 Flanges R56400 3.7165


Titanium Exhaust Flange Physical Properties


Properties Metric Imperial
Melting point 1674 °C 3045 °F
Density 4.43 g/cm3 0.160 lb/in3


UNS R56400 Titanium V Band Flange Thermal Properties


Properties Metric Imperial
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 9 µm/m°C 5 µin/in°F
Thermal conductivity 6.60W/mK 45.8 BTU in/hr.ft².°F


Check Dimensions & Weight Of AWWA C207 Titanium Exhaust Flange, Buy ANSI B16.5 Titanium V Band Flange at factory price list EX Dubai


300 Lb. Grade 2 Ti Flange Outside Diameter


NPS In Inch Outside Diameter Of Flanges Thickness Of Flanges Hub Dia. At Base Diameter Of RF Hub Dia. At Welding Point Welding Neck Slip On Welding Neck Slip On
Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm Inch mm
1/2 15 3.75 95.25 0.56 14.29 1.50 38.10 1.50 38.10 0.84 21.34 0.62 15.75 0.88 22.35 2.06 52.39 0.88 22.23
3/4 20 4.63 117.48 0.63 15.88 1.88 47.63 1.88 47.63 1.05 26.67 0.82 20.83 1.09 27.69 2.25 57.15 1.00 25.40
1 25 4.88 123.83 0.69 17.46 2.13 53.98 2.13 53.98 1.32 33.53 1.05 26.67 1.36 34.54 2.44 61.91 1.06 26.99
1-1/4 32 5.25 133.35 0.75 19.05 2.50 63.50 2.50 63.50 1.66 42.16 1.38 35.05 1.70 43.18 2.56 65.09 1.06 26.99
1-1/2 40 6.13 155.58 0.81 20.64 2.75 69.85 2.75 69.85 1.90 48.26 1.61 40.89 1.95 49.53 2.69 68.26 1.19 30.16
2 50 6.50 165.10 0.88 22.23 3.31 84.14 3.31 84.14 2.38 60.45 2.07 52.58 2.44 61.98 2.75 69.85 1.31 33.34
2-1/2 65 7.50 190.50 1.00 25.40 3.94 100.01 3.94 100.01 2.88 73.15 2.47 62.74 2.94 74.68 3.00 76.20 1.50 38.10
3 80 8.25 209.55 1.13 28.58 4.63 117.48 4.63 117.48 3.50 88.90 3.07 77.98 3.57 90.68 3.13 79.38 1.69 42.86
3-1/2 90 9.00 228.60 1.19 30.16 5.25 133.35 5.25 133.35 4.00 101.60 3.55 90.17 4.07 103.38 3.19 80.96 1.75 44.45
4 100 10.00 254.00 1.25 31.75 5.75 146.05 5.75 146.05 4.50 114.30 4.03 102.36 4.57 116.08 3.38 85.73 1.88 47.63
5 125 11.00 279.40 1.38 34.93 7.00 177.80 7.00 177.80 5.56 141.22 5.05 128.27 5.66 143.76 3.88 98.43 2.00 50.80
6 150 12.50 317.50 1.44 36.51 8.13 206.38 8.13 206.38 6.63 168.40 6.07 154.18 6.72 170.69 3.88 98.43 2.06 52.39
8 200 15.00 381.00 1.63 41.28 10.25 260.35 10.25 260.35 8.63 219.20 7.98 202.69 8.72 221.49 4.38 111.13 2.44 61.91
10 250 17.50 444.50 1.88 47.63 12.63 320.68 12.63 320.68 10.75 273.05 10.02 254.51 10.88 276.35 4.63 117.48 2.63 66.68
12 300 20.50 520.70 2.00 50.80 14.75 374.65 14.75 374.65 12.75 323.85 12.00 304.80 12.88 327.15 5.13 130.18 2.88 73.03


Titanium Weld Neck Flanges Dimensions


Titanium Weld Neck Flanges Dimensions

Normal Pipe Size

OD

Thickness

Diameter Of RF

Dia. Of hub At Base

Diameter Of Hub At Point Of Welding (Min)

Thru Hub Length

Diameter Of B.C.

O Q** R X H Y** -
1/2 3-1/2 7/16 1-3/8 1-3/16 0.84 1-7/8 2-3/8
3/4 3-7/8 1/2 1-11/16 1-1/2 1.05 2-1/16 2-3/4
1 4-1/4 9/16 2 1-15/16 1.32 2-3/16 3-1/8
1-1/4 4-5/8 5/8 2-1/2 2-5/16 1.66 2-1/4 3-1/2
1-1/2 5 11/16 2-7/8 2-9/16 1.90 2-7/16 3-7/8
2 6 3/4 3-5/8 3-1/16 2.38 2-1/2 4-3/4
2-1/2 7 7/8 4-1/8 3-9/16 2.88 2-3/4 5-1/2
3 7-1/2 15/16 5 4-1/4 3.50 2-3/4 6
3-1/2 8-1/2 15/16 5-1/2 4-13/16 4.00 2-13/16 7
4 15/16 6-3/16 5-5/16 4.50 3 7-1/2
5 10 15/16 7-5/16 6-7/16 5.56 3-1/2 8-1/2
6 11 1 8-1/2 7-9/16 6.63 3-1/2 9-1/2
8 13-1/2 1-1/8 10-5/8 9-11/16 8.63 4 11-3/4
10 16 1-3/16 12-3/4 12 10.75 4 14-1/4
12 19 1-1/4 15 14-3/8 12.75 4-1/2 17
14 21 1-3/8 16-1/4 15-3/4 14.00 5 18-3/4
16 23-1/2 1-7/16 18-1/2 18 16.00 5 21-1/4
18 25 1-9/16 21 19-7/8 18.00 5-1/2 22-3/4
20 27-1/2 1-11/16 23 22 20.00 5-11/16 25
24 32 1-7/8 27-1/4 26-1/8 24.00 6 29-1/2


ASTM B381 Gr 5 Titanium Blind Flange Weight


NPS Weight In Grade 5 Titanium Blind Flanges
½ 2
¾ 2
1 2
3
4
2 5
7
3 9
13
4 17
5 20
6 27
8 47
10 70
12 123
14 140
16 180
18 220
20 285
22 355
24 430