The most common pipeline
system in Ukraine is pipelines and fittings made of polypropylene.
 |
| PPR fittings |
At
first glance, the products of different manufacturers are very similar to each
other. Both color and design. There are differences of
course.
In
order to understand what the products differ from each other, it is necessary
to study it.
The
first thing that catches your eye is a different color scheme. Products in
Ukraine are gray. Russia, for example, white. In Europe - green. The color of
fittings or pipes on the quality and properties of the product is not affected.
The color of the goods can be different, even yellow.
 |
| Colors of fittings |
In
this article, I will touch upon the aspect of marking polypropylene fittings.
The
first and very important parameter of products for heating and water supply
systems is pressure. It denoted as by the value of PN or S. The marking S
replaced PN. Since it more accurately can designate new developed materials.
SDR is
the standard dimension ratio of the diameter of the outer to the minimum wall
thickness.
S - Pipe
series. It can be calculated by the formula S = (SDR-1) / 2.
 |
| Mark of pressure |
Accordingly,
the higher the pressure value, the more reliable the fitting is.
Mandatory
designations for the placement are the brand name or logo, the size of the part
and the type of material.
 |
| Mark of size and material |
Polypropylene
labeled in the following formats:
-
PPR;
-
PP-R;
-
PPRC;
-
PPR100;
-
PP-R Type 3;
-
PPRC Type 3;
-
PP-RCT and others.
Sometimes
they post such information:
- The
country where the goods were manufactured;
- The
standard to which the production process is responsible;
- Date
of manufacture;
-
The number of the mold.
The latter two characteristics are necessary only
for quality control of products. |
| Other marks of ppr-fittings |
Here
I described the main markings that placed on polypropylene fittings. In the
following articles, I will compare products from different manufacturers.
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