DIN2626 specifies types, sealing surface designs, dimensions, materials, manufacturing processes, the identification and designation of blind washers. These are designed with and without bores and are intended for installation between flange connections in pipelines (e.g. according to the DIN EN 13480 series of standards) and on tank nozzles (e.g. according to the DIN EN 13445 series of standards).
The blinds are intended for use with flanges according to DIN EN 1092-1 from nominal pressure level PN 6 to PN 160 and the sealing surface forms type A, type B, type C and type D.
The new standard offers the possibility of reducing the variety of company standards and thus costs.
In addition to the dimensioning of the line blinds, DIN2626 also regulates their marking and the testing of the materials used, the production and the condition of the sealing surfaces.
It can therefore be used without any problems, no calculations have to be carried out for the design of the spades.
DIN2626 restricts the choice of materials and combines different pressure levels into groups. The design of the thicknesses according to the lowest strength results in oversized blanking plates, which can make handling more difficult during assembly and drive up costs.
A material-dependent design, taking into account the strengths according to AD2000 data sheet B5, always has the advantage that the line blinds can be made significantly thinner. This makes handling easier and is significantly more cost-optimized.
sheets 1.0345, 1.0425, 1.5415, 1.7335, 1.4307, 1.4306, 1.4335, 1.4301, 1.4948, 1.4541, 1.4550, 1.4941, 1.4404, 1.4432, 1.4435, 1.4539, 1.4563, 1.4571, 1.4580
sheets without further processing
machined or turned sealing surfaces
DN10 - DN1400 PN6, PN10
DN10 - DN1000 PN16, PN25
DN10 - DN600 PN40
DN10 - DN400 PN63
DN10 - DN500 PN100
DN10 - DN300 PN160
typ A line blind
typ B ring spacer
typ C orifice
typ D spectacle blind as a sliding blind
typ E spectacle blind as a rotating blind
plain sealing surface form AA unprocessed
plain sealing surface form BB
groove-groove form DD
tongue and groove form CD
tongue-tongue form CC