| Size Range | DN 10 - DN 20001/2"- 48" |
| Pressure Ratings | Class - 150#, 300#, 600#, 900#, 1500#, 2500#, etc.PN - PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, PN160, etc. |
| Sealing Type | FF, RF, RJ, FM, M, T, G, etc. |
| Sealing Finish | Smooth or Spiral Finish (As your request) |
| Materials | Stainless steel:ASTM A182 Gr. F304/304L/316/316L ASTM A403 WP304/304L/316/316L ASTM A351 Gr. CF3/CF8/CF3M/CF8 MDuplex steel：UNS31803, SAF2205, UNS32205, UNS31500, UNS32750 , UNS32760, 1.4462, 1.4410, 1.4501 and etc. |
| Varieties | PL (Plate Flat), WN (Weld Neck), BL (Blind), SO (Slip-ons), SW (Socket Welds), TH (threaded), LF/SE(Lapped Flange/Stub ends), PJ/SE, LF/SE, etc. |
| Standard | US - ASME B16.5, ASME B16.47, MSS SP-44, AWWA C207 EU - EN 1092-1UK - BS 4504, BS 10 AU - AS 2129, AS/NZ 4087, AS 4331 RU - GOST 12820, GOST 12815, GOST 12821 DE - DIN 2627 - DIN 2638, DIN 2527, DIN 2558, DIN 2665 - DIN 2569, DIN 2573, DIN 2576, DIN 2641, etc. KR - KS B 1503 JP - JIS B2220 ZA - SABS 1123 ISO 7005-1 |
| Package | PE film + Plywood case |
| Trade Terms | EXW, FOB, CFR, CIF, etc. |
| Payment Terms | T/T, L/C, CAD, Credit Card |
| Application | Petrochemical & Gas industry, chemical, machinery, electric power, papermaking, construction Water works, Shipbuilding industry, Power industry, Valve industry,and general pipes connecting projects etc. |
General situation：
Flat welded flanges are suitable for piping systems with low pressure level and no serious pressure fluctuation, vibration or shock. The advantages of flat welded flange are easier to align in the welding assembly of flat welded flange, and the price is cheaper, so it has been widely used.
The product specifications are DN10-DN2000
Flat welding flanges are not allowed to be directly welded with tees, elbows and other pipe fittings, and straight pipe segments should be added.
Reference standard：
Standard of Chemical Industry Department:
HG20593-2009
HG20615-2009
National standard:
GB/T9119-2010
GB/T2555-81
Standard of Mechanical Department:
JB/T81-94
JB/T74-94
JB/T75-94
Marine Standard:
CB M1001-81
Use pressure PN0.25mpa, PN0.6mpa, PN1.0mpa, PN1.6mpa, PN2.5mpa, PN4.0mpa
Full flat plate flange (FF), Protruded plate flange (RF)
Manufacturing materials stainless steel (304, 316, etc.), carbon steel (20# 25#, etc.)
Product parameters：
(1) Flange outer diameter: 75mm-2190mm
(2). Bolt hole center circle diameter: 50mm----2130mm
(3). Bolt hole diameter: 11mm-30mm
(4). Number of bolt holes: 4 -48
(5). Thread: M10-M27
(6) Flange thickness: 12mm-58mm
(7). Pipe diameter: A(17.2-2032mm) B(14-2020mm)
Flange inner diameter: A(18-2036mm) B(15-2024mm)
(9) Flange theoretical weight: 0.36kg--234.6kg (DN1800)
(10) Flange pressure: 0.25MPA-4.0mpa
Flat welding flange and bolt, nut weight scale：
| Pipe | Flange theoretical weight (kg) | Single head bolt configuration | Nut configuration |
| Nominal diameter | Outer diameter | Line pressure | 0.6MPa | 1.0MPa | 1.6MPa | 2.5MPa | Hexagon nuts (rough) GB41-76 | Hexagon nut GB52-76 |
| 0.6MPa | 1.0MPa | 1.6MPa | 2.5MPa | Quantity * Diameter * Length | Weight (kg) | Quantity * Diameter * Length | Weight (kg) | Quantity * Diameter * Length | Weight (kg) | Quantity * Diameter * Length | Weight (kg) | Quantity * Diameter * Length | Weight (kg) | Quantity * Diameter * Length | Weight (kg) |
| 10 | 14 | 0.313 | 0.458 | 0.547 | 0.634 | 4*10*40 | 0.14008 | 4*12*40 | 0.19716 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 1000*6*5 | 2.32 | 1000*1.6*5 | 0.075 |
| 15 | 18 | 0.335 | 0.511 | 0.711 | 0.804 | 4*10*40 | 0.14008 | 4*12*40 | 0.19716 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 1000*8*5 | 5.67 | 1000*2*5 | 0.119 |
| 20 | 25 | 0.536 | 0.748 | 0.867 | 0.985 | 4*10*50 | 0.16472 | 4*12*50 | 0.23268 | 4*12*50 | 0.23268 | 4*12*60 | 0.2682 | 1000*10*5 | 10.99 | 1000*2.5*5 | 0.22 |
| 25 | 32 | 0.641 | 0.89 | 1.174 | 1.174 | 4*10*50 | 0.16472 | 4*12*50 | 0.23268 | 4*12*60 | 0.2682 | 4*12*60 | 0.2682 | 1000*12*5 | 16.32 | 1000*3*5 | 0.393 |
| 32 | 38 | 1.097 | 1.4 | 1.6 | 1.96 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 1000*14*5 | 25.28 | 1000*4*5 | 0.844 |
| 40 | 45 | 1.219 | 1.71 | 2 | 2.6 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 1000*16*5 | 34.12 | 1000*5*5 | 1.24 |
| 50 | 57 | 1.348 | 2.09 | 2.61 | 2.71 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 4*16*70 | 0.5516 | 1000*18*5 | 44.19 | 1000*6*5 | 2.317 |
| 65 | 73 | 1.67 | 2.84 | 3.45 | 3.22 | 4*10*50 | 0.16472 | 4*16*60 | 0.4884 | 4*16*70 | 0.5516 | 8*16*70 | 1.1032 | 1000*20*5 | 61.91 | 1000*8*5 | 5.674 |
| 80 | 89 | 2.48 | 3.24 | 3.71 | 4.06 | 4*10*60 | 0.18936 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 1000*22*5 | 75.94 | 1000*10*5 | 10.99 |
| 100 | 108 | 2.89 | 4.01 | 4.8 | 6 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 8*20*80 | 2.0368 | 1000*24*5 | 111.9 | 1000*12*5 | 16.32 |
| 125 | 133 | 3.94 | 5.4 | 6.47 | 8.26 | 4*16*60 | 0.4884 | 8*16*70 | 1.1032 | 8*16*80 | 1.2296 | 8*22*90 | 2.7152 | 1000*27*5 | 168 | 1000*14*5 | 25.28 |
| 150 | 159 | 4.47 | 6.12 | 7.92 | 10.4 | 8*16*60 | 0.9768 | 8*20*80 | 2.0368 | 8*20*80 | 2.0368 | 8*22*90 | 2.7152 | 1000*30*5 | 234.2 | 1000*16*5 | 34.12 |
| 175 | 194 | 5.54 | 7.44 | 8.81 | 11.9 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 8*20*80 | 2.0368 | 12*22*100 | 4.4304 | 1000*36*5 | 370.9 | 1000*18*5 | 44.19 |
| 200 | 219 | 6.07 | 8.24 | 10.1 | 14.5 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 12*20*90 | 3.3504 | 12*22*100 | 4.4304 | 1000*42*5 | 598.6 | 1000*20*5 | 61.91 |
| 225 | 245 | 6.6 | 9.3 | 11.7 | 17 | 8*16*70 | 1.1032 | 8*20*80 | 2.0368 | 12*20*90 | 3.3504 | 12*27*100 | 7.3116 | 1000*48*5 | 957.3 | 1000*22*5 | 75.94 |
| 250 | 273 | 8.03 | 10.7 | 15.7 | 19.9 | 12*16*70 | 1.6548 | 12*20*80 | 3.0552 | 12*22*90 | 4.0728 | 12*27*100 | 7.3116 | 1000*56*5 | 1420 | 1000*24*5 | 111.9 |
| 300 | 325 | 10.3 | 12.9 | 18.1 | 26.8 | 12*20*80 | 3.0552 | 12*20*80 | 3.0552 | 12*22*90 | 4.0728 | 16*27*110 | 10.4688 | 1000*64*5 | 1912 | 1000*27*5 | 168 |
| 350 | 377 | 12.59 | 15.9 | 23.3 | 34.35 | 12*20*80 | 3.0552 | 16*22*90 | 5.4304 | 16*22*100 | 5.9072 | 16*30*120 | 14.0048 | 1000*72*5 | 2584 | 1000*30*5 | 234.2 |
| 400 | 426 | 15.2 | 21.8 | 31 | 44.9 | 16*20*80 | 4.0736 | 16*22*90 | 5.4304 | 16*27*110 | 10.4688 | 16*30*130 | 14.8928 | 1000*80*5 | 3393 | 1000*36*5 | 370.9 |
| 450 | 478 | 17.59 | 24.4 | 40.2 | 51.92 | 16*20*80 | 4.0736 | 20*22*90 | 6.788 | 20*27*120 | 13.986 | 20*30*130 | 18.616 | 1000*90*5 | 4872 | 1000*42*5 | 598.6 |
| 500 | 529 | 20.67 | 27.7 | 55.1 | 67.3 | 16*20*90 | 4.4672 | 20*22*90 | 6.788 | 20*30*130 | 18.616 | 20*36*150 | 31.32 | 1000*100*5 | 6732 | 1000*48*5 | 957.3 |
| 600 | 630 | 26.57 | 39.4 | 80.3 |
| 20*20*90 | 5.584 | 20*27*110 | 13.086 | 20*36*140 | 29.72 |
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