Page 9 - GEORGFISCHER - LISTINO GHISA MALLEABILE 2023 - FIDRA

Size designation Elements of the Georg Fischer
designation
The designation of types of fittings starts from the
simplest possible basic types such as bend, elbow,
tee, cross etc.; basic features are also indicated. For inquiries and orders Georg Fischer introduced a
simple product designation. It consist of:
The following rules apply for
the sequence of connection Designation Explanation
sizes: Type of fitting catalogue number (see Product Range)
given in inch (see column “Dim.” of
Fitting size(s) Product Range)
- for equal fittings giving the
individual connection size Surface B = black
G = galvanised
once is sufficient.
illustr. 1/A tab. 3 Explanation of Georg Fischer designation
- for reducing fittings with 2
connections of different To avoid errors during specification, the 9 digit
sizes the connection size of Georg Fischer code, given in the following chapter
the larger is given first, than Product Range can be used as well.
the one of the smaller con- In both cases the Design Symbol must not be
nection. Exception: Elbow A4 indicated, since Georg Fischer exclusively produces
internal/external thread fittings according to Design Symbol A.
illustr. 1/B (catalogue no. 92) - first the
connection size of the inter- Example of designation for an Equal elbow with
nal thread. 2 internal threads, fitting size ½, galvanized,
Design Symbol A:
- for fittings with 3 or more 90 - ½ V or 770 090 204
connections (illustr. 1/A and
1/D) in case of equal connec-
tions on the run it is suffici- Threads
ent to give the size of the run
illustr. 1/C first, followed by the size of If not especially designated, fittings threads are
the branch. jointing threads R (taper external thread) and
Rp (parallel internal thread) according to
- for 3 different connections EN 10226-1 (ISO 7-1). Threads, which are fastening
sizes or fittings reduced in threads according to EN ISO 228-1, are especially
run the sequence for the marked with «G» at the symbol picture.
designation of connections
according to illustr. 1/B and
illustr. 1/D 1/C applies. Surface finish

Georg Fischer malleable cast iron fittings are sup-
plied in black or hot dip galvanised finish, covered
Example T with internal threads 1 ¼ on the run and ¾ with a preservative coating for temporary prevention
at the branch, black, Design Symbol A: of a rust film.
Tee EN 10242 – B1 – 1 ¼ x ¾ – Fe – A Exceptions are fittings marked with "ST" which are
made of steel, and if a galvanised finish is required,
Example Pitcher-T with internal threads 1 and ¾ are electroplated for technical reasons instead of hot
on the run and ½ at the branch, galvanised, dip galvanising.
Design Symbol A: Due to the lower corrosion protection electro plated
Pitcher-Tee EN 10242 – E1 – 1 x ½ x ¾ – Zn – A zinc surfaces are not suitable for drinking water
application.

According to the European and International standard
malleable cast iron pipe fittings must be free from
polycyclic aromatic hydrocarbons.

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