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POLYTHYLENE AND POLYPROPYLENE SPIRAL PIPES AND FITTINGS BSS

POLYTHYLENE AND POLYPROPYLENE SPIRAL PIPES AND FITTINGS BSS

POLYTHYLENE AND POLYPROPYLENE SPIRAL PIPES AND FITTINGS BSS

EN 13476, Bulgarian Technical Approval (BTA) 33-01/2013

The spiral pipe has a structure of RECTANGULAR PE and PP profile that is spirally wound on a drum with a specific diameter.

The spiral pipe has all the technical advantages of the equivalent polyethylene pipes with thick walls and achieves significant economy in terms of weight, in addition the installation is much easier, with higher efficiency.

APPLICATION:

  • sewage collectors;
  • sewage;
  • industrial systems;
  • roads and railways contruction;
  • tanks and cisterns;
  • inspection manholes etc.

Sizes, mm

Inside diameter ID

Nominal diameter DN

700 700
800 800
900 900
1000 1000
1100 1100
1200 1200
1300 1300
1400 1400
1500 1500
1600 1600
1800 1800
2000 2000

HARDNESS OF THE PIPES:

The stiffness of the SN pipes is one of the main parameters in the design of the gravity pipes. The dimension is in kN/m2 and indicates the pipe resistance to external loads (for example ground mass).

ISO 9969 DIN 16 961
2 16
4 32
6 48
8 64

CONNECTION:

  • Screw connection;
  • Screw connection and PE protective strip;
  • Welding with manual extruder;
  • Electro-fusion connection;
  • Metal connection with an internal thickening layer;
  • Butt welding;

The pipes which are threaded at both ends can be wound by using belts. If necessary, a crane can be used, for coaxiality the pipes must be placed on rollers and leveling pads.

THE DESIGN PROTECTIONS ACCORDING TO BSS EN 1610 ARE AFFECTED WHEN AMENDING:

  • width of the trench in relation to the project width;
  • depth of the trench in relation to the project depth;
  • the support system of the trench and the effect of its removal;
  • the degree of compression of the filling;
  • the degree of compression of the main filling;
  • pipe support and the condition of the trench bottom;
  • traffic above construction – temporary loads;
  • soil type and its parameters (for exaple – sub-soils, walls of the trench, filling);
  • shape of the trench (for exaple – floor trenches, trench with sloping walls);
  • ground and soil condition (for example – freezing and thawing, rain, snow, floods);
  • ground water level;
  • additional pipelines in the same trench;

ABRASIVENESS OF VARIOUS MATERIALS

In so-called Darmstadt abrasion test according to DIN 19 594, Part 2, the samples, used as a pipe material, are filled with a mixture of sand and water, and then subjected to a cycle of specific rotation movements.

TRANSPORT AND STORAGE:

Spiral pipes should be handled with care, and to avoid dragging of pipes and fittings. Pipes and fittings become slippery in wet of cold weather.

It is not recommended to work with pipes at temperatures below -25C.

Pipes must never be thrown. The places for lifting must always be well allocated at equal distances. Chains or hooks must not be used.

The unloading of site can be facilitated through the use of scaffold for rolling and straps for downhill.

All materials must be well controlled during the delivery and any defects must be dedicated to removed immediately. The entire lenght of the pipe must lie on a hard, smooth surface.

For secure and comfortable handling, the height of the storage of the tubes should be limited to 5 units but not more than 3m in order to avoid movement. Pipes and fittings must be stored away from hear sources.

All materials must be protected against vandalism, accidental damage and pollution.

 

 

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