01
For water
black PE100 wall · blue PP sheath
Drinking and utility water supply. The sheath lets the pipe be pulled without a sand bed.
04HDPE100 WATER/GAS · PP
PP-sheathed pipes
PE100 pressure pipes with an extra sheath of impact-resistant polypropylene: a continuous +1.5–2 mm jacket over the design wall — for trenchless installation and for laying in difficult ground without sand bedding.
ГОСТ 18599-2001 · СТ РК ГОСТ Р 50838-2011Ø200–630 mmPE100 / PP
Selected sizeSDR17
Ø630 mm
Wall 37.4 mm
Wall 37.4 mm
630mm
SDR
SDR17
Pressure
10 atm
Wall thickness
37.4 mm
Layers
2- and 3-layer
Choose a diameter
9 sizes · in stockNeed another diameter, class or coil supply? Request a quote →
What we make
Two-layer pipe for water and for gas
The polypropylene sheath goes on cold, as a separate layer over the finished PE100 pipe, adding 1.5–2 mm of protection. Its colour marks the service. Diameters 200–630 mm.
02
For gas
black PE100 wall · yellow PP sheath
Gas distribution networks. The same protective layer in yellow marking.
Construction01 02
How does it differ from a standard PE100 pipe?
It is the same PE100 pressure pipe — the difference is the protective layer and the way it is stripped before welding.
Two-layer construction
The PE100 carrier pipe takes the working pressure, while the polypropylene sheath absorbs external mechanical damage. The sheath is not part of the design wall: SDR and pressure class are selected exactly as for a standard pressure pipe.
Peelable sheath
Before butt welding or electrofusion the protective layer is stripped off the pipe ends with a dedicated peeling tool, exposing clean, undamaged pressure pipe. The pipe needs no special welding equipment.
About the product
Why does a pipe need a polypropylene protective sheath?
The PP sheath is a continuous jacket of impact-resistant polypropylene, 1.5–2 mm thick, applied over a finished PE100 pipe. It is not part of the design wall: the polyethylene carries the pressure, while the polypropylene absorbs abrasion, impact and contact with sharp ground. SDR and pressure class are therefore selected exactly as for a standard pressure pipe, and the sheath is only counted in the outside diameter — when choosing fittings, casings and the bore diameter for HDD. Production range is d200–630 mm; Pipe-Plast is the only producer of these pipes in the region.
Horizontal directional drilling, piercing and pulling; water mains, gas mains and pressure sewers; laying in rocky, frost-heaving and unstable soils; pipeline rehabilitation by the pipe-in-pipe method.
Applications
HDD and pulling
Horizontal directional drilling, piercing, pulling through the bore.
Pressure networks
Water mains, gas mains and pressure sewers.
Difficult ground
Rocky, frost-heaving and unstable soils.
Pipe-in-pipe rehabilitation
Relining of worn-out pipelines.
Order terms
- Minimum order — from 200 linear metres.
- Production lead time — 2–5 working days.
Advantages
Why designers specify it
The economics of this pipe are decided during earthworks and on trenchless crossings.
Laying without sand bedding
The protective layer rules out damage to the carrier pipe from gravel and sharp stones, so the trench is backfilled with local soil. That removes the cost of buying, hauling and compacting sand.
Gouge protection during HDD
During trenchless installation and pulling through the bore, scratches and chips stay on the outer polypropylene layer. The PE100 working pipe keeps its factory wall thickness and structural integrity.
Budget and schedule savings
There is no need to excavate extra soil for bedding: earthworks shrink, less heavy equipment is involved and the site is handed over sooner.
UV resistance
The outer polypropylene layer shields the polyethylene from sunlight, so pipes can be stored on open construction sites without losing their physical and mechanical properties.
Service life without point stress
With no damage or point loading on the carrier pipe, the design service life of 50 years holds even when the ground shifts or deforms.
Buyer's guide01 02 03 04
What does a pipe with PP sheath offer?
A polypropylene-sheathed pipe is a standard polyethylene pipe with an additional protective layer of polypropylene applied over the already-cooled pipe (plus 1.5–2 mm to the wall). The sheath protects the pipe from mechanical damage during trenchless installation, pulling and laying in soils with inclusions. Pipe-Plast manufactures PP-sheathed pipes in diameters d200–630 mm — a unique offering in the region: other plants apply protective coating only up to d160 mm. Important: a sheathed pipe is not a multi-layer pipe; the sheath is applied in a separate cold operation, whereas in a co-extruded pipe the layers bond while still in the hot melt. Both products are rated for a 50-year service life and come with GOST conformity certificates.
How is a coated pipe installed?
Before welding, the PP sheath is removed in the joint area — usually with a dedicated stripping tool or a knife, over a length sufficient for facing and alignment. Butt fusion then follows the standard PE100 procedure, with the usual parameters for the given diameter and SDR.
For electrofusion joints the sheath is stripped to the coupler length and the polyethylene is scraped as usual. After installation the stripped areas can be protected with a heat-shrink sleeve if required. The pipe needs no special welding equipment.
When to choose a PP sheath and when co-extrusion?
A PP sheath protects the surface against abrasion and gouging; it pays off above all when pulling by HDD or relining and when laying into fill and gravel soils. A co-extruded pipe solves a different task — the resistance of the wall material itself to slow crack growth caused by point loads.
If a section combines both factors — a long pull and aggressive soil — the design is selected per project, and it is worth agreeing the solution with a manager. Pipe-Plast produces both lines in diameters of 200–630 mm.
What sizes and documents are available for PP-coated pipes?
The production range is d200–630 mm, the base class is SDR17 (10 bar), with SDR13.6 and SDR11 available to order. The protective sheath is 1.5–2 mm on top of the design wall, which has to be allowed for when selecting fittings, casings and the borehole diameter for directional drilling.
The base pipe complies with GOST 18599-2001 / ST RK ISO 4427-2014 for water supply and ST RK GOST R 50838-2011 / ST RK ISO 4437-2014 for gas. Each batch comes with a quality passport and a certificate of conformity; the full document package is suitable for tenders and public procurement.
- In-house manufacturing
- On the market since 2008
- 50-year service life
- Certificates & GOST
Manufacturer pricing
We will price it for your diameter and volume
Price depends on the product spec. Call or leave a request — our team will pick the diameter, stiffness and quantity and arrange delivery.