Our flange world

In the early years of rff we earned a reputation as a competent partner for flanges – and this is just as true today. Our stock and delivery programme is accordingly both comprehensive and optimally sorted.

We can provide you with flanges in accordance with all current DIN standards, as well as in accordance with DIN EN 1092-1 or ASME Standard. Furthermore, we also deliver from stock weld neck flanges for automatic welding processes in accordance with PAS 1057-6.

No matter what you require, from standard products ex-stock to flanges involving extensive processing such as for instance special sealing surface forms, rff is the right partner to find a suitable solution.

When it comes to pipes, flanges, elbows and butt weld fittings as well as pipe equipment, we ensure strong connections. Welcome to the world of rff.

In this context, please also refer to

 

Flanges in acc. with DIN EN / DIN

Type

EN 

DIN 

Weld Neck Flanges

11

2627 – 2638

Blind Flanges

05

2527

Threaded Flanges

13

2558 | 2565 – 2569

Flat Flanges for Welding

01

2573 | 2576

Loose Flanges 

02

2641 | 2642 | 2655 | 2656

Loose Flanges

04

2673 – 2676

Weld-on Collars

32

2641 | 2642 | 2655 | 2656

Weld Neck Collars

34

2673 – 2676

Slip-on Flanges

12

86029 | 86030

Weld Flanges for Pressure Vessels 

28031 | 28033 

Lapped Flanges              

86037

Welding Flanges 

86041

Exhaust gas line Flanges 

86044

Special Flanges in accordance with drawings

Flanges for automatic welding processes in acc. with PAS 1057-6

Pressure classes

  • PN 6 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 320 | 400

Material grades

  • S235JR / RSt 37-2, S355J2 / St 52-3
  • P250GH / C 22.8, P245GH, P265GH
  • 16Mo3, 13CrMo4-5
  • P355QH1 / W/TStE 355
  • 1.4301, 1.4307, 1.4541
  • 1.4401, 1.4404, 1.4571
  • 1.4410 (Superduplex), 1.4462 (Duplex)
  • 1.4529, 1.4539, 1.4547

Dimensions

  • All standard dimensions as well as special dimensions

Facings

  • In accordance with DIN 2526 or DIN EN 1092-1, as well as customer specification.

 

Flanges in acc. with  ASME / BS / API

Type

ASME

Welding Neck Flanges

B 16.5 / 16.47

Blind Flanges

B 16.5 / 16.47

Slip-on Flanges

B 16.5

Lap Joint Flanges

B 16.5

Threaded Flanges

B 16.5

Socket Welding Flanges

B 16.5

Long Welding Neck Flanges

B 16.5

Orifice Flanges

B 16.36

Spectacle Blind

B 16.38

Flanges in accordance with  BS 3293 / API 6A, as well as in accordance with drawing

Pressure Classes

  • Class 150 | 300 | 400 | 600 | 900 | 1500 | 2500
  • 2000 | 3000 | 5000 | 10000 | 15000 | 20000 psi

Material Grades

  • A/SA 105/C21, P250GH
  • A/SA 182 Gr. F5, F9, F11, F12, F22, F91
  • A/SA 350 Gr. LF2, W/TStE 355, P355QH1
  • A/SA 694 Gr. F52, F60, F65 
  • A/SA 182 Gr. F304/L, F316/L, F321/H
  • 1.4541, 1.4571
  • F53 (Superduplex), F51 (Duplex)
  • Special Alloys

Dimensions

  • 1/2” to 48” and special sizes

Facings

  • RF and RTJ
  • To all requirements in accordance with customer specification

Turning and drilling (smooth or with thread), blasting, coating and marking in accordance with all customer requirements.

rff – Strongly connected.