Special flanges

The standard for valve connec­tions and transi­tions to steel/cast flanges

In the case of flange transi­tions on fittings with welding neck solutions from DN/OD 160 mm, the flange connection dimen­sions and the plastic pipe dimen­sioning result in signif­icant cross-sectional changes. The offset can cause problems when actuating the fittings, partic­u­larly when installing welding neck collars. In addition, the pre-welding collar tends to fail under full pressure.

Reinert-Ritz offers the solution to these problems with the special flange connection. This enables the connection of plastic pipes to fittings with the same nominal width and pressure class. The collar is designed as a fixed flange and equipped with a backing flange. This allows the fitting to be selected one stage smaller than with a conven­tional loose flange connection, depending on the nominal pipe diameter. This reduces project costs and the risk of deposits.

The steel backing flange has a plastic coating that provides long-lasting corrosion protection.

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Technical data

Technische Zeichnung Sonderflansch

Complete data sheet

Tender text

PE100 special flange

General prelim­inary remarks

The fittings to be offered must be supplied as a set consisting of a welding neck and a backing flange adapted to the dimension. The welding neck collars must be made of material in accor­dance with the PE100+ Associ­ation and comply with DIN EN 12201 and DIN EN 1555 in terms of dimen­sions, toler­ances and quality require­ments. The backing flanges must be made of steel with a plastic coating in accor­dance with DIN EN 10310. Proof of production on the basis of a quality assurance system in accor­dance with DIN EN ISO 9001 must be provided. A certificate in accor­dance with DIN EN 10204 must be provided by the manufac­turer for all molded parts. Alter­na­tively, the PE molded part body must be manufac­tured from a single piece of homoge­neous semi-finished product by injection molding. Semi-finished products made from winding rod or other subse­quently applied reinforce­ments are not permitted.

The collar must be drilled in accor­dance with the hole pattern to DIN EN 1092–1 PN 10 or PN 16. The screw holes are therefore closer to the outside diameter of the pipe. The backing flange must have the same hole pattern. This enables the same nominal diameter transition to fittings or steel flanges, for example.

The collar must be designed to be suitable for plastic in order to accom­modate the appro­pri­ately shaped backing flange so as to prevent a

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    to counteract defor­mation. This ensures that the flange connection can withstand full pressure in accor­dance with the pipe dimensions.

    The collar must be fitted with an EPDM O‑ring seal corre­sponding to the dimensions.

    The spigot ends must be long in order to be able to carry out both HE butt welding and HW welding.

    Optionally available versions: short form for HE butt welding, design in accor­dance with DIN EN 1092–1 PN 25, stainless steel backing flange, galvanised backing flange, flat sealing without groove and O‑ring or with slotted holes in the PE collar for perfect alignment of the flanges or fittings.

    Standards/guidelines
    DIN EN 12201, DIN EN 1092–1, DVS 2207, DVS 2210, DIN EN 10204, DIN EN ISO 9001, DIN EN ISO 50001, DVGW W 400–2, DVGW GW 335

    Approvals/certificates

    DVGW: DV-8606BT0423 and DV-8611BT0424

    Inspection certificate 3.1 according to DIN EN ISO 10204 on the semi-finished product of the processed raw material with indication of MFR and OIT; only PE100 material according to PE100+ Association

    Manufac­turer:
    Reinert-Ritz GmbH or equal

    Perfor­mance specification:
    PE100 special flange with backing flange made of steel with plastic coating according to DIN EN 10310 for equal nominal diameter connection to fittings, with EPDM O‑ring, designed for full pressure load capacity, drilled according to DIN EN 1092–1, with long welding end for HW welding,

    DN …
    d1 …
    SDR …
    PN …

    Proof of delivery:
    Reinert-Ritz GmbH
    Ernst-Heinkel-Straße 2
    48531 Nordhorn
    Tel.: +49 5921 8347–0
    Fax: +49 5921 8347–25
    www.reinert-ritz.de
    Email: contact@reinert-ritz.com

Downloads

Special flange data sheet

Instal­lation instructions

Flange program

RR product catalog

Molded parts in practice