Steel Flanges are an important part used to connect pipes or equipment. They use bolts, nuts and gaskets to achieve a sealed connection between two planes. Depending on the pressure level, the thickness of the flange and the bolts used will also be different. Flanges are widely used, not only for pipeline construction, but also for the connection of equipment inlets and outlets.
Backing rings
JUNRUI provides state-of-the-art fitting accessories
for jointing HDPE piping system which not only
ensures the safe conveyance but also makes it
possible to easily move HDPE pipes at a later stage.
Flanged Joints (with Stub Flanges and Backing Plates) – HDPE pipes can be flange-jointed by using HDPE stub
Hot-dip galvanized flange is a class of flanges with good corrosion resistance, can be made in the flange after the formation of rust immersed in about 500 ℃ melting zinc liquid, so that the surface of the steel components attached to the zinc layer, so as to play the purpose of anti-corrosion.
flange ends in conjunction with metal backing plates and a sealing gasket to provide a demountable joint or to
match up with pumps, valves etc.
Backing Rings have been modified as per the requirements of HDPE sizes.
JUNRUI can provide variety of backing ring for mechanical connectios in galvanized steel, statinless steel and PP coated steel.
1. Connecting pipes: Steel Flanges can firmly connect two pipes together through the fixation of bolts and gaskets to ensure the normal operation of the pipeline system. It can connect pipes of different materials and specifications, and has strong versatility and flexibility.
2. Withstand pressure: In pipeline engineering, Steel Flanges withstand pressure from the medium fluid. Because steel itself has high compressive resistance, coupled with the reasonable structural design of the flange connection and reliable bolt tightening, the flange can withstand pressure within a certain range and ensure the safe operation of the pipeline system
3. Adjust the direction of the pipeline: In the pipeline system, the flange can choose different models and connection methods as needed to adjust and change the direction of the pipeline and ensure the smooth operation of the pipeline system.
4. Prevent water leakage: The flange connection is firmly fastened, and with the appropriate sealing gasket, it can effectively prevent water leakage in the pipeline system, especially in flammable and explosive places such as chemical, petroleum, and natural gas. The sealing performance of stainless steel flanges is crucial to safe production.
5. Anti-corrosion: Steel Flanges have excellent corrosion resistance and can operate stably for a long time in harsh working environments. Especially in the fields of chemical industry and marine engineering, choosing steel flanges can effectively extend the service life of equipment.
6. Reduce maintenance costs: Because Steel Flanges are corrosion-resistant and wear-resistant, and have a long service life, they can effectively reduce the maintenance cost of the pipeline system. In comparison, the flange requires less frequent maintenance and replacement during use, reducing production losses caused by downtime maintenance.
Pipe Size | DN | PN | OD | PCD | ID | Bolt No. | Bolt Hole Dia | Thickness |
50 | 40 | 16 | 150 | 110 | 55 | 4 | 18 | 18 |
63 | 50 | 16 | 165 | 125 | 68 | 4 | 18 | 20 |
75 | 65 | 16 | 185 | 145 | 80 | 4 | 18 | 20 |
90 | 80 | 16 | 200 | 160 | 95 | 8 | 18 | 20 |
110 | 100 | 16 | 220 | 180 | 116 | 8 | 18 | 22 |
125 | 125 | 16 | 250 | 210 | 130 | 8 | 18 | 22 |
140 | 125 | 16 | 250 | 210 | 150 | 8 | 18 | 22 |
160 | 150 | 16 | 285 | 240 | 170 | 8 | 22 | 24 |
180 | 150 | 16 | 285 | 240 | 188 | 8 | 22 | 24 |
200 | 200 | 16 | 340 | 295 | 210 | 12 | 22 | 26 |
225 | 200 | 16 | 340 | 295 | 235 | 12 | 22 | 26 |
250 | 250 | 16 | 405 | 355 | 265 | 12 | 26 | 29 |
280 | 250 | 16 | 405 | 355 | 290 | 12 | 26 | 29 |
315 | 300 | 16 | 460 | 410 | 335 | 12 | 26 | 32 |
355 | 350 | 16 | 520 | 470 | 365 | 16 | 26 | 35 |
400 | 400 | 16 | 580 | 525 | 420 | 16 | 30 | 38 |
450 | 450 | 16 | 640 | 585 | 470 | 20 | 30 | 42 |
500 | 500 | 16 | 715 | 650 | 520 | 20 | 33 | 46 |
560 | 600 | 16 | 840 | 770 | 575 | 20 | 36 | 55 |
630 | 600 | 16 | 840 | 770 | 650 | 20 | 36 | 55 |
710 | 700 | 16 | 910 | 840 | 740 | 24 | 36 | 63 |
800 | 800 | 16 | 1025 | 950 | 830 | 24 | 39 | 74 |