Introduction:

UPVC pipes with a 70 year back ground are the most useful plastic type ones in the world.

Some characteristics such as high firmness, polished surface, longevity and self fire fighting make these types of pipes perfect and number one.

In spite of some other pipes, the UPVC ones are a mix of different materials such as resin pvc, thermal and lighting stabilizers, mineral fillers such as carbonate sodium, external and internal ravankonande such as acid estareek, vax and some materials to help the process.

The UPVC pipes are used in different positions regarding to their type, formulation, thickness and related standards:

A- Urban, agriculture and industrial water supply (without and under stress)

B- Urban and home sewage (without and under stress)

C- Industrial and chemical fluids transferring

D- Gas supply

E- abhay sathi collecting

F- Protecting the communicative tele cabin and electricity cable passing

International standards:

Today the national standards are:

-       Iran national standards no 9117 for the water supply

-        Iran national standard no 9118 for urban sewage

-        Iran national standard no 7669 for zehkeshi pipes which are made from poly venil hard chloride.

The UPVC pipe standards will be presented very soon. After presenting the above standards, national standards 2408-2047-341 are expired.