Stainless steel flange from 11/2 inch-32 inch in PN10/ PN16/150PSI, customized standard & dimension available, carbon steel, galvanized steel and stainless steel material for choice, high quality with the most competitive wholesale price. Contact us freely for more details of the steel backing rings from JUNNUO!
Junnuo 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
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.
Junnuo can provide variety of backing ring for mechanical connectios in galvanized steel, statinless steel and PP coated steel.
Steel backing ring is an important component in pipeline connection. It achieves sealing through the synergy of bolts, flanges and gaskets. Specifically, the role of steel backing ring is reflected in the following aspects:
1. Sealing connection: Steel backing ring generates sufficient pressure between gasket and flange sealing surface through the pre-tightening force of bolts, so that the deformation of gasket surface is sufficient to fill the microscopic unevenness of flange sealing surface, thereby achieving the purpose of sealing. This kind of sealing connection requires not only good sealing, but also the ability to withstand the pressure and temperature fluctuations generated by the fluid in the pipeline.
2. Withstand pressure and temperature fluctuations: The material of flange is usually carbon steel, stainless steel or alloy steel, etc., to meet the needs of different media and working conditions. Steel backing ring can withstand high pressure and temperature to ensure the safe operation of pipeline system.
3. Prevent fluid leakage: Gasket, as an indispensable sealing element in flange connection, is placed between two flanges. Through the tightening force of bolts and nuts, the gasket is compressed on the sealing surface of the flange to achieve the sealing effect. Gaskets are usually made of rubber, asbestos, polytetrafluoroethylene, etc. They have good sealing and corrosion resistance and can effectively prevent leakage of fluids in pipelines.
4. Widely used: Steel backing rings and their matching gaskets and bolts together constitute the basic unit of pipeline connection and are widely used in pipeline systems in water, petroleum, chemical, electric power, municipal and other industries to connect various pipelines and equipment.
Pipe Size | DN | OD | PCD | ID | Bolt No. | Bolt Hole Dia | Thickness |
50 | 1 1/2″ | 127 | 98.6 | 63 | 4 | 16 | 17.5 |
63 | 2″ | 152 | 120.5 | 68 | 4 | 20 | 19.5 |
75 | 2 1/2″ | 178 | 139.5 | 80 | 4 | 20 | 22.5 |
90 | 3″ | 190 | 152.5 | 95 | 4 | 20 | 24 |
110 | 4″ | 229 | 190.5 | 116 | 8 | 20 | 24 |
125 | 5″ | 254 | 216 | 130 | 8 | 22 | 24 |
140 | 5″ | 254 | 216 | 150 | 8 | 22 | 24 |
160 | 6″ | 279 | 241.5 | 170 | 8 | 22 | 25.5 |
180 | 6″ | 279 | 241.5 | 188 | 8 | 22 | 25.5 |
200 | 8″ | 343 | 298.5 | 210 | 8 | 22 | 29 |
225 | 8″ | 343 | 298.5 | 235 | 8 | 22 | 29 |
250 | 10″ | 406 | 362 | 265 | 12 | 26 | 30.5 |
280 | 10″ | 406 | 362 | 290 | 12 | 26 | 30.5 |
315 | 12″ | 483 | 432 | 335 | 12 | 30 | 32 |
355 | 14″ | 533 | 476 | 365 | 12 | 26 | 35 |
400 | 16″ | 597 | 540 | 420 | 16 | 30 | 37 |
450 | 18″ | 635 | 578 | 470 | 16 | 33 | 40 |
500 | 20″ | 698 | 635 | 520 | 20 | 33 | 43 |
560 | 24″ | 813 | 749.5 | 575 | 20 | 36 | 48 |
630 | 24″ | 813 | 749.5 | 650 | 20 | 36 | 48 |
710 | 28″ | 927.1 | 863.6 | 740 | 28 | 35 | 52.4 |
800 | 32″ | 1060.4 | 977.9 | 830 | 28 | 41 | 57.1 |