In the behavior, we make beveling after shot blasting, bevel ends are fully machined by advanced equipment Double Beveling Machine ensure the height, length, thickness, O.D. and I.D. are all qualified.
Welding Bevel acc. to
ASME B16.9, Factory-Made Wrought Steel Buttwelding Fittings
ASME B16.28, Buttwelding Short Radius Elbows and Returns
ANSI/ASME B16.25, Buttwelding Ends
MSS SP-97, Socket Welding, Threaded, and Buttwelding Ends
The ends of all buttweld fittings are bevelled, exceeding wall thickness 4 mm for austenitic stainless steel, or 5 mm for ferritic stainless steel. The shape of the bevel depending upon the actual wall thickness. This bevelled ends are needed to be able to make a "Butt weld".
Welding Bevel acc.to ASME / ANSI B16.9 and ASME / ANSI B16.28
ASME B16.25 covers the preparation of buttwelding ends of piping components to be joined into a piping system by welding. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends (including dimensions and dimensional tolerances).
Our in-hourse R&D team developed bevel ends equipment are good using in thickness 2mm to 20mm pipe fittings, guarantee high efficiency and high quality.
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These weld edge preparation requirements are also incorporated into the ASME standards (e.g., B16.9, B16.5, B16.34).
| Nominal wall Thickness : t | End Preparation |
| t<5mm (for austenitic alloy steel t<4mm) | Cut square or slightly chamfer at manufacturer ' s option |
| 5<t<22mm (4<t<22mm) | Plain Bevel as in sketch ( a ) above |
| t>22mm | Compound Bevel as in sketch ( b ) above |
| Nominal pipe DN size | Outside Diameter at Bevel | Center to End | ||||
| D1 | D2 | C | M | |||
| Series A | Series B | Series A | Series B | |||
| 20×15 | 26.9 | 25 | 21.3 | 18 | 29 | 29 |
| 25×20 25×15 | 33.7 33.7 | 32 32 | 26.9 21.3 | 25 18 | 38 38 | 38 38 |
| 32×25 32×20 32×15 | 42.4 42.4 42.4 | 38 38 38 | 33.7 26.9 21.3 | 32 25 18 | 48 48 48 | 48 48 48 |
| 40×32 40×25 40×20 40×15 | 48.3 48.3 48.3 48.3 | 45 45 45 45 | 42.4 33.7 26.7 21.3 | 38 32 25 18 | 57 57 57 57 | 57 57 57 57 |
| 50×40 50×32 50×25 50×20 | 60.3 60.3 60.3 60.3 | 57 57 57 57 | 48.3 42.4 33.7 26.9 | 45 38 32 25 | 64 64 64 64 | 60 57 51 44 |
| 65×50 65×40 65×32 65×25 | 76.1(73) 76.1(73) 76.1(73) 76.1(73) | 76 76 76 76 | 60.3 48.3 42.4 33.7 | 57 45 38 32 | 76 76 76 76 | 70 67 64 57 |
| 80×65 80×50 80×40 80×32 | 88.9 88.9 88.9 88.9 | 89 89 89 89 | 76.1(73) 60.3 48.3 42.4 | 76 57 45 38 | 86 86 86 86 | 83 76 73 70 |
| 90×80 90×65 90×50 90×40 | 101.6 101.6 101.6 101.6 | - - - - | 88.9 76.1(73) 60.3 48.3 | - - - - | 95 95 95 95 | 92 89 83 79 |
| 100×90 100×80 100×65 100×50 100×40 | 114.3 114.3 114.3 114.3 114.3 | - 108 108 108 108 | 101.6 88.9 76.1(73) 60.3 48.3 | - 89 76 57 45 | 105 105 105 105 105 | 102 98 95 89 86 |
| 125×100 125×90 125×80 125×65 125×50 | 139.7 139.7 139.7 139.7 | 133 - 133 133 133 | 114.3 101.6 88.9 76.1(73) 60.3 | 108 - 89 76 57 | 124 124 124 124 124 | 117 114 111 108 105 |
| 150×125 150×100 150×90 150×80 150×65 | 168.3 168.3 168.3 168.3 168.3 | 159 159 - 159 159 | 139.7 114.3 101.6 88.9 76.1(73) | 133 108 - 89 76 | 143 143 143 143 143 | 137 130 127 124 121 |
| 200×150 200×125 200×100 200×90 | 219.1 219.1 219.1 219.1 | 219 219 219 - | 168.3 139.7 114.3 101.6 | 159 133 108 - | 178 178 178 178 | 168 162 156 152 |
| 200×200 200×150 200×125 200×100 | 273.0 273.0 273.0 273.0 | 273 273 273 273 | 219.1 168.3 139.7 114.3 | 219 159 133 108 | 216 216 216 216 | 208 194 191 184 |
| 300×250 300×200 300×150 | 323.9 323.9 323.9 | 325 325 325 | 273.0 219.1 168.3 | 273 219 159 | 254 254 254 | 241 229 219 |
| 300×125 | 323.9 | 325 | 139.7 | 133 | 254 | 216 |
| 350×300 350×250 350×200 350×150 | 355.6 355.6 355.6 355.6 | 377 377 377 377 | 323.9 273.0 219.1 168.3 | 325 273 219 159 | 279 279 279 279 | 270 257 248 238 |
| 400×350 400×300 400×250 400×200 400×150 | 406.4 406.4 406.4 406.4 406.4 | 426 426 426 426 426 | 355.6 323.9 273.0 219.1 168.3 | 377 325 273 219 159 | 305 305 305 305 305 | 305 295 283 273 264 |
| 450×400 450×350 450×300 450×250 450×200 | 457.2 457.2 457.2 457.2 457.2 | 478 478 478 478 478 | 406.4 355.6 323.9 273.0 219.1 | 426 377 325 273 219 | 343 343 343 343 343 | 330 330 321 308 298 |
| 500×450 500×100 500×350 500×300 500×250 500×200 | 508.0 508.0 508.0 508.0 508.0 508.0 | 529 529 529 529 529 529 | 457.2 406.4 355.6 323.9 273.0 219.1 | 478 426 377 325 273 219 | 381 381 381 381 381 381 | 368 356 356 346 333 324 |
| 550×500 550×450 550×400 | 559 559 559 | - - - | 508 457 406 | - - - | 419 419 419 | 406 394 381 |
| 600×550 600×550 600×450 | 610 610 610 | - 630 630 | 559 508 457 | - 530 480 | 432 432 432 | 432 432 419 |
| 650×600 650×550 650×500 | 660 660 660 | - - - | 610 559 508 | - - - | 495 495 495 | 483 470 457 |
| 700×650 700×600 700×550 | 711 711 711 | - 720 - | 660 610 559 | - 630 - | 521 521 521 | 521 508 495 |
| 750×700 750×650 750×600 | 762 762 762 | - - - | 711 660 610 | - - - | 559 559 559 | 546 546 533 |
| 800×750 800×700 800×650 | 813 813 813 | - 820 - | 762 711 660 | - 720 - | 597 597 597 | 584 572 572 |
| 850×800 850×750 850×700 | 864 864 864 | - - - | 813 762 711 | - - - | 635 635 635 | 622 610 597 |
| 900×850 900×800 900×750 | 914 914 914 | - 920 - | 864 813 762 | - 820 - | 673 673 673 | 660 648 635 |
| 950×900 950×850 950×800 | 965 965 965 | - - - | 914 864 813 | - - - | 711 711 711 | 711 698 686 |
| 1000×950 1000×900 1000×8500 | 1016 1016 1016 | - 1020 - | 965 914 864 | - 920 - | 749 749 749 | 749 737 724 |
| 1000×1000 1050×950 1050×900 | 1067 1067 1067 | - - - | 1016 965 914 | - - - | 762 762 762 | 711 711 711 |
| 1100×1050 1100×1000 1100×950 | 1118 1118 1118 | - 1120 - | 1067 1016 965 | - 1020 - | 813 813 813 | 762 749 737 |
| 1150×1100 1150×1050 1150×1000 | 1168 1168 1168 | - - - | 1118 1067 1016 | - - - | 851 851 851 | 800 787 775 |
| 1200×1150 1200×1100 1200×1050 | 1220 1220 1220 | - 1220 - | 1168 1118 1067 | - 1120 - | 889 889 889 | 838 838 813 |
| Nominal pipe size | Outside Diameter at Bevel | Center to End | |||
| D | C | M | |||
| DN | INCH | Series A | Series B | ||
| 15 | 1/2 | 21.3 | 18 | 25 | |
| 20 | 3/4 | 26.9 | 25 | 29 | |
| 25 | 1 | 33.7 | 32 | 38 | |
| 32 | 11/4 | 42.4 | 38 | 48 | |
| 40 | 11/2 | 48.3 | 45 | 57 | |
| 50 | 2 | 60.3 | 57 | 64 | |
| 65 | 21/2 | 76.1(73) | 76 | 76 | |
| 80 | 3 | 88.9 | 89 | 86 | |
| 90 | 31/2 | 101.6 | ― | 95 | |
| 100 | 4 | 114.3 | 108 | 105 | |
| 125 | 5 | 139.7 | 133 | 124 | |
| 150 | 6 | 168.3 | 159 | 143 | |
| 200 | 8 | 219.1 | 219 | 178 | |
| 250 | 10 | 273.0 | 273 | 216 | |
| 300 | 12 | 323.9 | 325 | 254 | |
| 350 | 14 | 355.6 | 377 | 279 | |
| 400 | 16 | 406.4 | 426 | 305 | |
| 450 | 18 | 457.2 | 478 | 343 | |
| 500 | 20 | 508.0 | 529 | 381 | |
| 550 | 22 | 559 | ― | 419 | |
| 600 | 24 | 610 | 630 | 432 | |
| 650 | 26 | 660 | ― | 495 | |
| 700 | 28 | 711 | 720 | 521 | |
| 750 | 30 | 762 | ― | 559 | |
| 800 | 32 | 813 | 820 | 597 | |
| 850 | 34 | 864 | ― | 635 | |
| 900 | 36 | 914 | 920 | 673 | |
| 950 | 38 | 965 | ― | 711 | |
| 1000 | 40 | 1016 | 1020 | 749 | |
| 1050 | 42 | 1067 | ― | 762 | 711 |
| 1100 | 44 | 1118 | 1120 | 813 | 762 |
| 1150 | 46 | 1168 | ― | 851 | 800 |
| 1200 | 48 | 1220 | 1220 | 889 | 838 |
There are four different type of connections that are used for fittings:
Butt Weld Fittings – Probably the most common type of fitting. They are easily manufactured and are easily installed. Butt weld fittings can be connected directly to each other. This is called fitting make up.
Flanged Fittings – Flanged fittings are piping components where the flange is an integral component of the fitting. These are most often used in water treatment applications or lined piping where welding would be destructive to the liner.
Socket Weld Fittings – These fittings have a socket weld connection on each end. They might be used for smaller diameter piping. These fittings utilize a single fillet weld to join the piping with the fitting.
Threaded Fittings – Threaded fittings are generally four inches and smaller. The reason for this size constraint is the pipe end needs to be threaded with a male type connection and die sizes are unobtainable in the larger diameters.
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