Flange jointing system

About Rendifield flange jointing system

RENDIFIELD MINING AND INDUSTRIAL PIPING SOLUTIONS Flanges supplied by Rendifield become reliable workhorse partners to any suburbian or urban challenge with regards to HDPE installation and pipe maintenance.  Rendifield’s commitment to Excellence in Service will ensure that your project stays on target.

Contact us today for the best service!

What are flanges?

Pipe flanges are protruding rims, edges, ribs, or collars used to make a connection between two pipes or between a pipe and any type of fitting or equipment component. 

Flange jointing system specifications

First and foremost, a flange must fit the pipe or equipment for which it is designed. Physical specifications for pipe flanges include dimensions and design shapes. 

Flange faces can be manufactured to a large number of custom shapes based design requirements. Some examples include:

  • Flat
  • Raised face (RF)
  • Ring type joint (RTJ)
  • O-ring groove
Flange jointing system dimensions

Physical dimensions should be specified in order to size flanges correctly.

  • Outside diameter (OD) is the distance between two opposing edges of a flange’s face. 
  • Thickness refers to the thickness of the attaching outer rim, and does not include the part of the flange that holds the pipe.
  • Bolt circle diameter is the length from the center of a bolt hole to the center of the opposing hole.
  • Pipe size is a pipe flange’s corresponding pipe size, generally made according to accepted standards. It is usually specified by two non-dimensional numbers, nominal pipe size (NPS) and schedule (SCH).
  • Nominal bore size is the inner diameter of the flange connector. When manufacturing and ordering any type of pipe connector, it is important to match the bore size of the piece with the bore size of the mating pipe.

 

BACKING FLANGES              
T/D HDG OD ID THK PCD NO. HOLES e x 45 KG/PC  
25MM 101.6 38 10 73 4 14.3 4 0.50  
32MM 114.3 45 10 82.6 4 14.3 4 0.63  
40MM 120.7 51 10 87.3 4 14.3 4 0.69  
50MM 133.4 63 10 98.4 4 14.3 4 0.80  
63MM 152.4 78 10 114.3 4 17.5 4 0.98  
75MM 165.1 92 10 127 4 17.5 4 1.09  
90MM 184.1 110 10 146 4 17.5 4 1.27  
110MM 215.9 136 10 177.8 4 17.5 4 1.66  
125MM 215.9 136 10 177.8 4 17.5 4 1.66  
140MM 254 158 12 209.6 8 17.5 6 2.75  
160MM 279.4 190 12 235 8 17.5 6 2.93  
180MM 279.4 190 12 235 8 17.5 6 2.93  
200MM 336.3 237 12 292.1 8 17.5 6 4.04  
225MM 336.3 237 12 292.1 8 17.5 6 4.04  
250MM 406.4 279 16 355.6 8 22.2 8 8.23  
280MM 406.4 292 16 355.6 8 22.2 8 7.51  
315MM 457.2 330 19 406.4 12 22.2 8 11.10  
355MM 527.1 376 22 469.9 12 25.4 8 17.50  
400MM 577.9 430 22 520.7 12 25.4 8 19.20  
450MM 641.4 476 25 584.2 12 25.4 8 27.30  
500MM 704.9 533 28 641.4 16 25.4 8 35.00  
560MM 762 592 28 698 16 28.6 8 37.50  
630MM 825.5 645 30 755.7 16 28.6 8 46.80  
                   
BACKING FLANGES                  
1000/6 HDG                  
110MM 220 136 12 180 8 18 4 2.03  
125MM 220 136 12 180 8 18 4 2.03  
140MM 250 158 14 210 8 18 6 3.02  
160MM 285 190 16 240 8 22 6 4.08  
180MM 285 190 16 240 8 22 6 4.08  
200MM 340 237 18 295 8 22 6 6.17  
225MM 340 237 18 295 8 22 6 6.17  
250MM 395 279 20 350 12 22 8 8.93  
280MM 395 292 20 350 12 22 8 8.02  
315MM 445 330 22 400 12 22 8 11.30  
355MM 505 376 25 460 16 22 8 16.40  
400MM 565 430 25 515 16 26 8 19.10  
450MM 615 476 30 565 20 26 8 25.60  
500MM 670 533 30 620 20 26 8 28.10  
560MM 730 592 35 675 20 26 8 36.50  
630MM 780 645 36 725 20 26 8 39.80  
630MM(2) 835 662 36 780 20 26 8 54.60  
710MM 895 737 40 840 24 26 8 59.70  
800MM 1015 840 45 950 24 33 8 82.90  
900MM 1115 942 50 1050 28 33 8 100.40  
1000MM 1230 1045 55 1160 28 33 8 132.50  
                   
BACKING FLANGES                  
1600/6 HDG                  
25MM 105 38 10 75 4 14 4 0.55  
32MM 115 45 10 85 4 14 4 0.65  
40MM 140 51 10 100 4 18 4 0.97  
50MM 150 63 10 110 4 18 4 1.07  
63MM 165 78 12 125 4 18 4 1.47  
75MM 185 92 12 145 4 18 4 1.82  
90MM 200 110 14 160 8 18 4 2.19  
110MM 220 136 14 180 8 18 4 2.36  
125MM 220 136 14 180 8 18 4 2.36  
140MM 250 158 16 210 8 18 6 3.45  
160MM 285 190 18 240 8 22 6 4.59  
180MM 285 190 18 240 8 22 6 4.59  
200MM 340 237 22 295 12 22 6 7.28  
225MM 340 237 22 295 12 22 6 7.28  
250MM 405 279 25 355 12 26 8 12.05  
280MM 405 292 25 355 12 26 8 10.90  
315MM 460 330 28 410 12 26 8 16.40  
355MM 520 376 30 470 16 26 8 21.90  
400MM 580 430 32 525 16 26 8 27.80  
450MM 640 476 35 585 20 26 8 36.60  
500MM 715 533 40 650 20 33 8 50.70  
560MM 775 592 40 710 20 33 8 56.40  
630MM 840 645 50 770 20 33 8 82.70  
710MM 910 737 50 840 24 33 8 79.90  
800MM 1025 840 60 950 24 39 8 114.30  
900MM 1125 942 65 1050 28 39 8 134.70  
1000MM 1255 1045 70 1170 28 39 8 190.30  
                   
                   
Flange jointing system applications

Pipe flanges are used for dismantling piping systems, temporary or mobile installations, transitions between dissimilar materials, and connections in environments not conducive to solvent cementing.

Flange jointing system procedure

Pipe flanges have flush or flat surfaces that are perpendicular to the pipe to which they attach. Two of these surfaces are mechanically joined via bolts, collars, adhesives or welds.

Welding joins materials by melting the workpieces and adding a filler material. For strong, high pressure connections of similar materials, welding tends to be the most effective method of flange connection. Most pipe flanges are designed to be welded to pipes.

While the method of attachment can be a distinguishing feature, there are other considerations more important to pipe flange selection. Factors an industrial buyer should consider first are the flange’s physical specifications, type, material, and performance features most suitable for the application.