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Class 300 Flanges

What does mean by ANSI class 300 Flange?
A flange is designated with different pressure classes, showcasing their load-bearing capacity. A class 300 flange is a low-pressure class flange whose weight holding capacity reduces as the temperature in the system increases. These flanges can be constructed with stainless steel, carbon steel, aluminum, ductile steel, etc. The 300 flanges can efficiently connect different piping equipment to create a versatile pipeline.

ANSI B16.5 Class 300 Blind flanges vs ANSI B16.5 class 300 Lap Joint Flanges

  • ANSI B16.5 Class 300 blind flange is designed without a bore and is used primarily as blanks. These blinds help in terminating the flow of media in the system. ANSI B16.5 class 300 Lap Joint Flanges is designed with a two-component assembly consisting of a stub end and a ring-type sealing.
  • The pressure holding capacity of lap joint flanges is lower than blind flanges.
  • Blind flanges are in constant contact with pressurized fluid. Lap joint flanges are not in continuous contact with fluids, thereby making the grade resistant to corrosive affluents.
  • Lap joint flanges have space to swivel around and line up to opposite bolt holes. Blind flanges don’t have such movement capability.

ANSI B16.47 Series A Class 300 Flanges vs ANSI B16.5 Class 300 Flanges

  • The ANSI B16.47 Series A Class 300 flanges are available in sizes between 24 to 60 inches. ANSI B16.5 Class 300 flanges cover sizes up to 24 inches.
  • The ANSI B16.47 is generally heavier and stronger than the ANSI B16.5 class flange.

Best Quality ASME B16.5 Class 300 Plate Flange Stockholder, Ready to dispatch stock of ANSI 300 Forged Flange

ANSI B16.47 Series A Class 300 Flanges Specification

Specifications Class 300 Flange
Standards BS | ASME | DIN | GOST | EN | ANSI Flanges
Sizes From 1/2 inch upto 48 inch (15 NB upto 1200NB)
JIS Standards From 5 K to 63 K
Flanges Face Type RF, FF, LMF, RTJ, SMF, LJF
UNI/ DIN / EN Standard 6Bar, 10 Bar, 16Bar, 25 Bar, 40Bar
Other Pressure Classes From Class 150 to 2500

Class 300 Flanges Price List

Description Price Per Kg In Singapore Price Per Kg In UAE Price Per Kg In USD Price Per Kg In Malaysia
3/4 Inch Sch 80/XS Flange Weld Neck RF Class 300 A105N SGD 9.13 UAE Dirham 23.83 US $6.59 MYR 28.90
5-1/2 FLANGE ANSI B16. CLASS 300 MATERIAL STEEL SGD 190.46 UAE Dirham 497.31 US $137.55 MYR 603.12
3/4 Flange Blind RF Class 300 A105N SGD 8.78 UAE Dirham 22.94 US $6.34 MYR 27.82
8 STAINLESS STEEL FLANGES WNRF CLASS 300, A182 F 316L SGD 167.40 UAE Dirham 437.10 US $120.90 MYR 530.10
300 4 Inch Sch 40 Flange Weld Neck RF Class Std A105N SGD 27.70 UAE Dirham 72.33 US $20.01 MYR 87.72
2 IN X SCH 80 X 300 CLASS STAINLESS STEEL ASTM A182 WELD NECK RAISED FACE FLANGE SGD 18.97 UAE Dirham 49.54 US $13.70 MYR 60.08

ANSI 16.5 Class 300 Flanges Types

ANSI B16.5 Class 300 Flange

ANSI B16.5 Class 300 Flange

300 lb RTJ Flange

300 lb RTJ Flange

Class 300 Slip On Flange

Class 300 Slip On Flange

ANSI B16.47 Series B Class 300 Flanges

ANSI B16.47 Series B Class 300 Flanges

ANSI B16.5 Class 300 Forged Flanges

ANSI B16.5 Class 300 Forged Flanges

Class 300 Wnrf Flange

Class 300 Wnrf Flange

ASME B16.5 Class 300 RF Flange

ASME B16.5 Class 300 RF Flange

300 lb Lap Joint Flange

300 lb Lap Joint Flange

Class 300 ANSI B16.5 Forged Flanges

Class 300 ANSI B16.5 Forged Flanges

ASME B16.5 class 300 Orifice Flanges

ASME B16.5 class 300 Orifice Flanges

300# Blind Flange

300# Blind Flange

ASME B16.5 Class 300 Blind Flanges

ASME B16.5 Class 300 Blind Flanges

Class 300 Weld Neck Flange

Class 300 Weld Neck Flange

SS 300# Pipe Flange

SS 300# Pipe Flange

Class 300 Pipe Flange

Class 300 Pipe Flange

Class 300 Blind Flange

Class 300 Blind Flange

300# WN Flange

300# WN Flange

ANSI 16.5 Class 300 Flanges

ANSI 16.5 Class 300 Flanges

ASME B16.48 Spectacle Blind Class 300 Flanges

ASME B16.48 Spectacle Blind Class 300 Flanges

Class 300 Threaded Flange

Class 300 Threaded Flange

Class 300 Reducing Flange

Class 300 Reducing Flange

Class 300 Flange

Class 300 Flange

ANSI B16.47 Series A Class 300 Flanges

ANSI B16.47 Series A Class 300 Flanges

300# Long Weld Neck Flange

300# Long Weld Neck Flange

Dimensions of ANSI B16.5 Class 300 Threaded Flanges

Dimensions of ANSI B16.5 Class 300 Threaded Flanges
Nominal Pipe Size Outside Diameter (O) Thickness (T) Raised Face Diameter (R) Length Thru Hub (Y) Hub Diameter (X) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 1.38 in 0.88 in 1.50 in 2 lb 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.69 in 1.00 in 1.88 in 3 lb 3.25 in 4 0.75 in
1 4.88 in 0.69 in 2.00 in 1.06 in 2.13 in 3 lb 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 2.50 in 1.06 in 2.50 in 4 lb 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 2.88 in 1.19 in 2.75 in 6 lb 4.50 in 4 0.88 in
2 6.50 in 0.88 in 3.63 in 1.31 in 3.31 in 7 lb 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 4.13 in 1.50 in 3.94 in 10 lb 5.88 in 8 0.88 in
3 8.25 in 1.13 in 5.00 in 1.69 in 4.63 in 13 lb 6.63 in 8 0.88 in
3 1/2 9.00 in 1.19 in 5.50 in 1.75 in 5.25 in 17 lb 7.25 in 8 0.88 in
4 10.00 in 1.25 in 6.19 in 1.88 in 5.75 in 22 lb 7.88 in 8 0.88 in
5 11.00 in 1.38 in 7.31 in 2.00 in 7.00 in 28 lb 9.25 in 8 0.88 in
6 12.50 in 1.44 in 8.50 in 2.06 in 8.13 in 39 lb 10.63 in 12 0.88 in
8 15.00 in 1.63 in 10.63 in 2.44 in 10.25 in 58 lb 13.00 in 12 1.00 in
10 17.50 in 1.88 in 12.75 in 2.62 in 12.63 in 81 lb 15.25 in 16 1.13 in
12 20.50 in 2.00 in 15.00 in 2.88 in 14.75 in 115 lb 17.75 in 16 1.25 in
14 23.00 in 2.13 in 16.25 in 3.00 in 16.75 in 165 lb 20.25 in 20 1.25 in
16 25.50 in 2.25 in 18.50 in 3.25 in 19.00 in 190 lb 22.50 in 20 1.38 in
18 28.00 in 2.38 in 21.00 in 3.50 in 21.00 in 250 lb 24.75 in 24 1.38 in
20 30.50 in 2.50 in 23.00 in 3.75 in 23.13 in 315 lb 27.00 in 24 1.38 in
22 33.00 in 2.63 in 25.25 in 4.00 in 25.25 in 370 lb 29.25 in 24 1.63 in
24 36.00 in 2.75 in 27.25 in 4.19 in 27.63 in 475 lb 32.00 in 24 1.63 in

Pressure Rating of Class 300 Flanges

Temperature (in F°) 300#
200 680
100 740
300 655
500 605
400 635
600 570
700 530
650 550
750 505
850 320
800 410
950 135
900 230
1000 85
Hydrostatic Test Pressure (psig) 1125

Worldwide supplier of ANSI Class 300 Reducing Flange at factory price, Leading stockist of ASME CL300 Spectacle Blind Flange

ANSI B16.5 Class 300 Welding Neck Flanges Dimensions

ANSI B16.5 Class 300 Welding Neck Flanges Dimensions
Nominal Pipe Size Outside Diameter (O) Thickness (T) Raised Face Diameter (R) Length Thru Hub (Y) Point of Weld (A) Hub Diameter (X) Bore (B) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 1.38 in 2.06 in 0.84 in 1.50 in 0.62 in 2 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.69 in 2.25 in 1.05 in 1.88 in 0.82 in 3 3.25 in 4 0.75 in
1 4.88 in 0.69 in 2.00 in 2.44 in 1.32 in 2.13 in 1.05 in 4 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 2.50 in 2.56 in 1.66 in 2.50 in 1.38 in 5 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 2.88 in 2.69 in 1.90 in 2.75 in 1.61 in 7 4.50 in 4 0.88 in
2 6.50 in 0.88 in 3.63 in 2.75 in 2.38 in 3.31 in 2.07 in 9 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 4.13 in 3.00 in 2.88 in 3.94 in 2.47 in 12 5.88 in 8 0.88 in
3 8.25 in 1.13 in 5.00 in 3.13 in 3.50 in 4.63 in 3.07 in 15 6.63 in 8 0.88 in
3 1/2 9.00 in 1.19 in 5.50 in 3.19 in 4.00 in 5.25 in 3.55 in 18 7.25 in 8 0.88 in
4 10.00 in 1.25 in 6.19 in 3.38 in 4.50 in 5.75 in 4.03 in 25 7.88 in 8 0.88 in
5 11.00 in 1.38 in 7.31 in 3.88 in 5.56 in 7.00 in 5.05 in 32 9.25 in 8 0.88 in
6 12.50 in 1.44 in 8.50 in 3.88 in 6.63 in 8.13 in 6.07 in 42 10.63 in 12 0.88 in
8 15.00 in 1.63 in 10.63 in 4.38 in 8.63 in 10.25 in 7.98 in 67 13.00 in 12 1.00 in
10 17.50 in 1.88 in 12.75 in 4.63 in 10.75 in 12.63 in 10.02 in 91 15.25 in 16 1.13 in
12 20.50 in 2.00 in 15.00 in 5.13 in 12.75 in 14.75 in 12.00 in 140 17.75 in 16 1.25 in
14 23.00 in 2.13 in 16.25 in 5.63 in 14.00 in 16.75 in 13.25 in 180 20.25 in 20 1.25 in
16 25.50 in 2.25 in 18.50 in 5.75 in 16.00 in 19.00 in 15.25 in 250 22.50 in 20 1.38 in
18 28.00 in 2.38 in 21.00 in 6.25 in 18.00 in 21.00 in 17.25 in 320 24.75 in 24 1.38 in
20 30.50 in 2.50 in 23.00 in 6.38 in 20.00 in 23.13 in 19.25 in 400 27.00 in 24 1.38 in
22 33.00 in 2.63 in 25.25 in 6.50 in 22.00 in 25.25 in 21.25 in 465 29.25 in 24 1.63 in
24 36.00 in 2.75 in 27.25 in 6.63 in 24.00 in 27.63 in 23.25 in 580 32.00 in 24 1.63 in

Class 300 Flange Sizes

Class 300 Flange Sizes
Outside Diameter
(OD)
Nominal Size WN LTH
(WL)
Min. Thickness
(T)
No. of Bolt Holes RF Dia.
(R)
Diameter of Holes SO Bore ID
(SB)
Bolt Circle
(BC)
WN Bore ID
(WB)
Dia. Hub Top
(HT)
Dia. Hub Base
(HB)
SO LTH
(SL)
3.75 1⁄2 2.00 0.50 4 1.38 0.63 0.88 2.62 0.62 0.84 1.50 0.81
4.62 3⁄4 2.19 0.56 4 1.69 0.75 1.09 3.25 0.82 1.05 1.88 0.94
4.88 1 2.38 0.62 4 2.00 0.75 1.36 3.50 1.05 1.32 2.12 1.00
5.25 11⁄4 2.50 0.69 4 2.50 0.75 1.70 3.88 1.38 1.66 2.50 1.00
6.12 11⁄2 2.63 0.75 4 2.88 0.88 1.95 4.50 1.61 1.90 2.75 1.13
6.50 2 2.69 0.81 8 3.62 0.75 2.44 5.00 2.07 2.38 3.31 1.25
7.50 21⁄2 2.94 0.94 8 4.12 0.88 2.94 5.88 2.47 2.88 3.94 1.44
8.25 3 3.06 1.06 8 5.00 0.88 3.57 6.62 3.07 3.50 4.62 1.63
9.00 31⁄2 3.13 1.12 8 5.50 0.88 4.07 7.25 3.55 4.00 5.25 1.69
10.00 4 3.32 1.19 8 6.19 0.88 4.57 7.88 4.03 4.50 5.75 1.82
11.00 5 3.82 1.31 8 7.31 0.88 5.66 9.25 5.05 5.56 7.00 1.94
12.50 6 3.82 1.38 12 8.50 0.88 6.72 10.62 6.07 6.63 8.12 2.00
15.00 8 4.32 1.56 12 10.62 1.00 8.72 13.00 7.98 8.63 10.25 2.38
17.50 10 4.56 1.81 16 12.75 1.12 10.88 15.25 10.02 10.75 12.62 2.56
20.50 12 5.06 1.94 16 15.00 1.25 12.88 17.75 12.00 12.75 14.75 2.82
23.00 14 5.56 2.06 20 16.25 1.25 14.14 20.25 13.25 14.00 16.75 2.94
25.50 16 5.69 2.19 20 18.50 1.38 16.16 22.50 15.25 16.00 19.00 3.19
28.00 18 6.19 2.31 24 21.00 1.38 18.18 24.75 17.25 18.00 21.00 3.44
30.50 20 6.32 2.44 24 23.12 1.38 20.20 27.00 19.25 20.00 23.12 3.69
33.00 22 6.43 2.57 24 25.25 1.63 22.22 29.25 21.25 22.00 25.25 3.93
36.00 24 6.56 2.69 24 27.62 1.63 24.25 32.00 23.25 24.00 27.62 4.13

ANSI B16.5 Class 300 Lap Joint Flanges Dimensions

ANSI B16.5 Class 300 Lap Joint Flanges Dimensions
Nominal Pipe Size Outside Diameter (O) Thickness (T) Length Thru Hub (Y) Hub Diameter (X) Radius (r) Bore (B) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 0.88 in 1.50 in 0.13 in 0.90 in 2 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.00 in 1.88 in 0.13 in 1.11 in 3 3.25 in 4 0.75 in
1 4.88 in 0.69 in 1.06 in 2.13 in 0.13 in 1.38 in 3 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 1.06 in 2.50 in 0.19 in 1.72 in 4 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 1.19 in 2.75 in 0.25 in 1.97 in 6 4.50 in 4 0.88 in
2 6.50 in 0.88 in 1.31 in 3.31 in 0.31 in 2.46 in 7 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 1.50 in 3.94 in 0.31 in 2.97 in 10 5.88 in 8 0.88 in
3 8.25 in 1.13 in 1.69 in 4.63 in 0.38 in 3.60 in 13 6.63 in 8 0.88 in
3 1/2 9.00 in 1.19 in 1.75 in 5.25 in 0.38 in 4.10 in 17 7.25 in 8 0.88 in
4 10.00 in 1.25 in 1.88 in 5.75 in 0.44 in 4.60 in 22 7.88 in 8 0.88 in
5 11.00 in 1.38 in 2.00 in 7.00 in 0.44 in 5.69 in 28 9.25 in 8 0.88 in
6 12.50 in 1.44 in 2.06 in 8.13 in 0.50 in 6.75 in 39 10.63 in 12 0.88 in
8 15.00 in 1.63 in 2.44 in 10.25 in 0.50 in 8.75 in 58 13.00 in 12 1.00 in
10 17.50 in 1.88 in 3.75 in 12.63 in 0.50 in 10.92 in 91 15.25 in 16 1.13 in
12 20.50 in 2.00 in 4.00 in 14.75 in 0.50 in 12.92 in 140 17.75 in 16 1.25 in
14 23.00 in 2.13 in 4.38 in 16.75 in 0.50 in 14.18 in 190 20.25 in 20 1.25 in
16 25.50 in 2.25 in 4.75 in 19.00 in 0.50 in 16.19 in 250 22.50 in 20 1.38 in
18 28.00 in 2.38 in 5.13 in 21.00 in 0.50 in 18.20 in 295 24.75 in 24 1.38 in
20 30.50 in 2.50 in 5.50 in 23.13 in 0.50 in 20.25 in 370 27.00 in 24 1.38 in
22 33.00 in 2.63 in 5.75 in 25.25 in 0.50 in 22.25 in 435 29.25 in 24 1.63 in
24 36.00 in 2.75 in 6.00 in 27.63 in 0.50 in 24.25 in 550 32.00 in 24 1.63 in
Purchase ANSI B16.5 Class 300 Weld Neck Flange in specific design, We offer custom size of 300 LBS Threaded Flange for leak-free connections.

Applications of ANSI B16.47 Class 300 Flanges

Oil & Gas
Oil & Gas

Oil & Gas

Chemical
Chemical

Chemical

Petrochemical
Petrochemical

Petrochemical

Marine
Marine

Marine

Refinery
Refinery

Refinery

Power Plant
Power Plant

Power Plant

ANSI B16.5 Class 300 Slip-on Flanges Dimensions

ANSI B16.5 Class 300 Slip-on Flanges Dimensions
Nominal Pipe Size Outside Diameter (O) Thickness (T) Raised Face Diameter (R) Length Thru Hub (Y) Hub Diameter (X) Bore (B) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 1.38 in 0.88 in 1.50 in 0.88 in 2 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.69 in 1.00 in 1.88 in 1.09 in 3 3.25 in 4 0.75 in
1 4.88 in 0.69 in 2.00 in 1.06 in 2.13 in 1.36 in 3 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 2.50 in 1.06 in 2.50 in 1.70 in 4 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 2.88 in 1.19 in 2.75 in 1.95 in 6 4.50 in 4 0.88 in
2 6.50 in 0.88 in 3.63 in 1.31 in 3.31 in 2.44 in 7 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 4.13 in 1.50 in 3.94 in 2.94 in 10 5.88 in 8 0.88 in
3 8.25 in 1.13 in 5.00 in 1.69 in 4.63 in 3.57 in 13 6.63 in 8 0.88 in
3 1/2 9.00 in 1.19 in 5.50 in 1.75 in 5.25 in 4.07 in 17 7.25 in 8 0.88 in
4 10.00 in 1.25 in 6.19 in 1.88 in 5.75 in 4.57 in 22 7.88 in 8 0.88 in
5 11.00 in 1.38 in 7.31 in 2.00 in 7.00 in 5.66 in 28 9.25 in 8 0.88 in
6 12.50 in 1.44 in 8.50 in 2.06 in 8.13 in 6.72 in 39 10.63 in 12 0.88 in
8 15.00 in 1.63 in 10.63 in 2.44 in 10.25 in 8.72 in 58 13.00 in 12 1.00 in
10 17.50 in 1.88 in 12.75 in 2.62 in 12.63 in 10.88 in 81 15.25 in 16 1.13 in
12 20.50 in 2.00 in 15.00 in 2.88 in 14.75 in 12.88 in 115 lb 17.75 in 16 1.25 in
14 23.00 in 2.13 in 16.25 in 3.00 in 16.75 in 14.14 in 165 lb 20.25 in 20 1.25 in
16 25.50 in 2.25 in 18.50 in 3.25 in 19.00 in 16.16 in 190 lb 22.50 in 20 1.38 in
18 28.00 in 2.38 in 21.00 in 3.50 in 21.00 in 18.18 in 250 lb 24.75 in 24 1.38 in
20 30.50 in 2.50 in 23.00 in 3.75 in 23.13 in 20.20 in 315 lb 27.00 in 24 1.38 in
22 33.00 in 2.63 in 25.25 in 4.00 in 25.25 in 22.22 in 370 lb 29.25 in 24 1.63 in
24 36.00 in 2.75 in 27.25 in 4.19 in 27.63 in 24.25 in 475 lb 32.00 in 24 1.63 in

Dimensions of ANSI B16.5 Class 300 Socket-weld Flanges

Dimensions of ANSI B16.5 Class 300 Socket-weld Flanges
Nominal Pipe Size Outside Diameter (O) Thickness (T) Raised Face Diameter (R) Length Thru Hub (Y) Hub Diameter (X) Bore (B1) Bore (B2) Depth of Socket (D) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 1.38 in 0.88 in 1.50 in 0.62 in 0.88 in 0.38 in 2 lb 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.69 in 1.00 in 1.88 in 0.82 in 1.09 in 0.44 in 3 lb 3.25 in 4 0.75 in
1 4.88 in 0.69 in 2.00 in 1.06 in 2.13 in 1.05 in 1.36 in 0.50 in 3 lb 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 2.50 in 1.06 in 2.50 in 1.38 in 1.70 in 0.56 in 4 lb 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 2.88 in 1.19 in 2.75 in 1.61 in 1.95 in 0.63 in 6 lb 4.50 in 4 0.88 in
2 6.50 in 0.88 in 3.63 in 1.31 in 3.31 in 2.07 in 2.44 in 0.69 in 7 lb 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 4.13 in 1.50 in 3.94 in 2.47 in 2.94 in 0.75 in 10 lb 5.88 in 8 0.88 in
3 8.25 in 1.13 in 5.00 in 1.69 in 4.63 in 3.07 in 3.57 in 0.81 in 13 lb 6.63 in 8 0.88 in
We Keep Ready Stock of 300 ANSI Orifice Flanges. View B16.5 Class 300 RTJ Flange Pressure Rating and Weight Chart

ANSI B16.5 Class 300 Blind Flanges Dimensions

ANSI B16.5 Class 300 Blind Flanges Dimensions
Nominal Pipe Size Outside Diameter (O) Thickness (T) Raised Face Diameter (R) Approximate Weight Bolt Circle (C) Number of Holes Diameter of Holes
1/2 3.75 in 0.56 in 1.38 in 2 lb 2.63 in 4 0.63 in
3/4 4.63 in 0.63 in 1.69 in 3 lb 3.25 in 4 0.75 in
1 4.88 in 0.69 in 2.00 in 3 lb 3.50 in 4 0.75 in
1 1/4 5.25 in 0.75 in 2.50 in 4 lb 3.88 in 4 0.75 in
1 1/2 6.13 in 0.81 in 2.88 in 6 lb 4.50 in 4 0.88 in
2 6.50 in 0.88 in 3.63 in 8 lb 5.00 in 8 0.75 in
2 1/2 7.50 in 1.00 in 4.13 in 12 lb 5.88 in 8 0.88 in
3 8.25 in 1.13 in 5.00 in 16 lb 6.63 in 8 0.88 in
3 1/2 9.00 in 1.19 in 5.50 in 21 lb 7.25 in 8 0.88 in
4 10.00 in 1.25 in 6.19 in 27 lb 7.88 in 8 0.88 in
5 11.00 in 1.38 in 7.31 in 35 lb 9.25 in 8 0.88 in
6 12.50 in 1.44 in 8.50 in 50 lb 10.63 in 12 0.88 in
8 15.00 in 1.63 in 10.63 in 81 lb 13.00 in 12 1.00 in
10 17.50 in 1.88 in 12.75 in 124 lb 15.25 in 16 1.13 in
12 20.50 in 2.00 in 15.00 in 185 lb 17.75 in 16 1.25 in
14 23.00 in 2.13 in 16.25 in 250 lb 20.25 in 20 1.25 in
16 25.50 in 2.25 in 18.50 in 295 lb 22.50 in 20 1.38 in
18 28.00 in 2.38 in 21.00 in 395 lb 24.75 in 24 1.38 in
20 30.50 in 2.50 in 23.00 in 505 lb 27.00 in 24 1.38 in
22 33.00 in 2.63 in 25.25 in 640 lb 29.25 in 24 1.63 in
24 36.00 in 2.75 in 27.25 in 790 lb 32.00 in 24 1.63 in

Class 300 Flange Weight Chart

Class 300 Flange Weight Chart
Approximate Weight in Pounds Nominal Pipe Size Drilling Length of Bolts
Slip-on Threaded Welding Neck Blind Lap Joint Diameter of Bolts Diameter of Bolt Circle Diameter of Holes Number of Bolts Stud Bolts Machine Bolts 1/16” R.F.
1/16” Raised Face Ring Joint
3 4 2 3 1/2 1/2 2-5/8 5/8 4 2-1/2 3 2
3 4 3 3 3/4 5/8 3-1/4 3/4 4 2-3/4 3-1/4 2-1/2
3 5 4 3 1 5/8 3-1/2 3/4 4 3 3-1/2 2-1/2
4 6 6 4 1-1/4 5/8 3-7/8 3/4 4 3 3-1/2 2-3/4
6 9 7 6 1-1/2 3/4 4-1/2 7/8 4 3-1/2 4 3
7 10 8 7 2 5/8 5 3/4 8 3-1/4 4 3
10 13 15 10 2-1/2 3/4 5-7/8 7/8 8 3-3/4 4-1/2 3-1/4
13 16 16 13 3 3/4 6-5/8 7/8 8 4 4-3/4 3-1/2
17 19 20 17 3-1/2 3/4 7-1/4 7/8 8 4-1/4 5 3-3/4
22 26 27 22 4 3/4 7-7/8 7/8 8 4-1/4 5 3-3/4
28 35 41 28 5 3/4 9-1/4 7/8 8 4-1/2 5-1/4 4
39 45 50 39 6 3/4 10-5/8 7/8 12 4-3/4 5-1/2 4-1/4
58 70 80 58 8 7/8 13 1 12 5-1/4 6 4-3/4
82 94 120 91 10 1 15-1/4 1-1/8 16 6 6-3/4 5-1/4
115 140 184 139 12 1-1/8 17-3/4 1-1/4 16 6-1/2 7-1/4 5-3/4
163 190 249 189 14 1-1/8 20-1/4 1-1/4 20 6-3/4 7-1/2 6
220 250 324 240 16 1-1/4 22-1/2 1-3/8 20 7-1/4 8 6-1/2
280 305 416 305 18 1-1/4 24-3/4 1-3/8 24 7-1/2 8-1/4 6-3/4
325 380 516 375 20 1-1/4 27 1-3/8 24 8 8-3/4 7
492 540 763 530 24 1-1/2 32 1-5/8 24 9 10 7-3/4

80% repeat orders from below countries

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Union Carbide And Petronas Petrochemical Facility - Engineering Malaysia

Union Carbide And Petronas Petrochemical Facility - Engineering Malaysia

Doha South Sewage Treatment Works-Qatar

Doha South Sewage Treatment Works-Qatar