DECLARATION OF MALLEABLE CAST IRON FITTINGS UNI EN 10242 · 2020. 2. 20. · Accords to EN10242....
Transcript of DECLARATION OF MALLEABLE CAST IRON FITTINGS UNI EN 10242 · 2020. 2. 20. · Accords to EN10242....
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