DECLARATION OF MALLEABLE CAST IRON FITTINGS UNI EN 10242

� RANGE OF PRODUCT

Malleable cast iron fittings, used for drinkable water, gas and other hydronic application, according to

international standards ISO-49 and European standards EN 10242.

� MECHANICAL PROPERTIES

Mechanical properties of materials, accords to standard EN1562:

Standard real

Traction strength 350 N/mm2 358,60 N/mm2

Yield point … 230,60%

Extension 10% 10,90%

Chemical analysis Standard real

Coal 2,5 – 2,8 % 2,70%

Silicon 1,5 – 1,7 % 1,65 %

Manganese 0,40 – 0,55 0,43 %

Sulfur < 0,2 % 0,03 %

Chromium < 0,055 % 0,03 %

� MATERIAL

The material is malleable cast iron fittings accord to EN1562.

Kind of cast iron used is : EN-GJMB-350-10

� ZINC HOT DIPPING

Zinc process is made by immersion and medium thickness is from 70 to 80 micron, according to surface

and the article figure.

Zinc surface protection accord to EN 10242, art. 5.2.

The percentage of alloying into zinc finished coating are not superior to the maximum values, indicated in

the table below, according to EN 10242 art. 5.2.1 :

Aluminium 0,10 %

Antimony 0,01 %

Arsenic 0,02 %

Bismuth 0,01 %

Cadmium 0,01 %

Copper 0,10 %

Lead 1,6 %, in single cases 1,8 %

Tin 0,10 %

� THREAD

Thread coupling: fittings thread is made by ISO 7-1.

External treads are conical (R), internal are cylindrical (Rp)-

Mounting thread: threads of nuts, nuts for unions accords to ISO 228-1.

� DESIGN

Fittings are identified with symbols:

Type of threads Type of material

Symbol design Internal External

A R Rp EN-GJMB-350-10

Fittings are reinforced on internal thread end, by a rounded edge, except in case of a polygonal form or if

there are lateral vents.

� ENDURANCE

Accords to EN10242.

� HYDRAULIC TEST

All fittings exceed hydraulic test control (EN10242 art. 11.4) and the final visual check.

Internal hydrostatic pressure has to be almost of 20 bar.

� PROTECTION

Against rust is used a special non-toxic coating.

� MARKING

Fittings are marked in the process of fusion indicating those dates:

- Brand manufacturers

- Dimension of fittings

Marking accords to EN10242 art. 14.

� RELATIONS BETWEEN FITTINGS DIMENSIONS AND NOMINAL DIAMETER (DN)

This relations is only indicative.

1/8 ¼ 3/8 ½ ¾ 1 1”1/4 1”1/2 2” 2”1/2 3 4 5 6

6 8 10 15 20 25 32 40 50 65 80 100 125 150

� REFERENCES

ISO7-2 Pipe threads where pressure tight joints are made on threads

ISO228-2 Pipe threads where pressure tight joints are not made on threads

ISO1460 Metallic coatings

ISO2178 Non magnetic coating on magnetic substrates

ISO2859 Sampling procedures for inspection by attributes