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RPM Diffusion — Professional Marine Valves

Flange

A flange provides a joint that can be dismantled, between two pipes or between a pipe and a valve, a pump or a piece of equipment. Six types are available:

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  • weld neck, butt-welded to the pipe;
  • plate and slip-on flanges, slipped over the pipe and then welded;
  • lap joint (loose) flanges, fitted on a stub end;
  • blind flanges, to close a pipe end;
  • threaded flanges, screwed onto a threaded pipe, notably in bronze.

Two dimensional systems coexist. PN-designated flanges follow EN 1092-1: here from PN6 to PN40, for example the type 11 PN16 weld neck flange. Pressure-class flanges follow ASME B16.5: here classes 150 and 300, with the pipe wall thickness (STD, XS or schedule) in the product name. Two components with the same DN and the same PN have compatible mating dimensions.

Materials: P280GH, A105 or A350 LF2 steel, 316 and 316L stainless steel, bronze, aluminium, galvanised or zinc-plated steel. Sealing faces (raised face RF, type B1 face) are given in the product names or descriptions. The data sheet of the type 01A stainless steel plate flange, for example, gives PN16, DN200 to DN600, in 304L or 316L.

For sealing, see flange gaskets; to take up expansion and vibration, see flanged expansion joints.

Brands: RPM and Guidi.

41 products

Threaded flange

Plate flange

See the 11 products “Plate flange”

Blind flange

Blind flange

RPMBLF150

Blind flange

13 variants

from €13.09 excl. VAT

See the 9 products “Blind flange”

Slip-on flange

Loose flange

Weld neck flange