HDP Drainage Systems from Turkey
Steeling.net supplies HDP (high-density polymer) drainage systems manufactured by MEA Grup in Turkey — modular surface drainage systems with integrated polymer channel bodies and grating covers, available in five EN 1433 load classes from A15 (pedestrian) to F900 (heavy logistics and airport). HDP systems combine the corrosion resistance and light weight of polymer materials with a full load-class range suited to both light and heavy infrastructure applications.
Available Load Classes
MEA Grup's HDP drainage systems are available across five EN 1433 load classes, making them one of the most versatile modular polymer drainage solutions on the market. The same system architecture — polymer channel body with integrated cover frame — is engineered and tested to deliver certified performance at each load class, from light pedestrian use through to the most demanding heavy-load infrastructure environments.
A15
15 kN
Pedestrian areas, cycle paths, roof terraces, gardens
B125
125 kN
Car parks, footpaths, residential driveways, light vehicles
C250
250 kN
Kerbside, slow-speed roads, commercial access
D400
400 kN
Public roads, carriageways, logistics yards
F900
900 kN
Airports, aircraft stands, extreme heavy-load areas
Each load class is independently tested and certified to EN 1433. The load class marking is permanently indicated on the cover surface as required by the standard. For project specification purposes, the load class must match the maximum vehicle or equipment load in the installation area — not the average load.
System Features
HDP drainage systems are designed for fast installation, long service life, and minimal maintenance — three characteristics that make them well suited to infrastructure projects where programme time and lifecycle cost are key procurement criteria. The all-polymer construction eliminates the corrosion that affects polymer-concrete or metal systems in aggressive environments, and the modular format allows channel runs to be assembled to any required length with standard components.
All-polymer construction
Channel body, cover frame, and grating are all manufactured from high-density polymer — no metal components that can corrode, rust, or be targeted for theft.
Integrated system design
Channel body and cover are designed and tested as a unit. No compatibility issues between channel body and grating cover — the load performance is certified for the assembled system.
Lightweight — fast installation
Significantly lighter than polymer concrete or cast iron alternatives. Fewer operatives required for handling and installation, reducing programme time and labour cost.
Full load-class range
A15 through F900 — the same system architecture scaled across five load classes. One supplier, one system, any application.
Chemical & corrosion resistance
Resistant to most industrial chemicals, salt water, de-icing agents, and aggressive soils. Suitable for coastal, chemical, and winter road environments where metal or cement channels degrade.
Modular and cuttable
Standard 500mm and 1000mm channel modules connect end-to-end with simple clip or socket joints. Channels can be cut on site to fit non-standard run lengths without specialist tools.
Low maintenance
Smooth polymer internal surfaces resist silt build-up and are easy to clean. No surface treatment, painting, or re-coating required during service life.
No scrap value — theft deterrent
Polymer materials have no scrap metal value. HDP gratings and covers are not subject to the theft that affects cast iron and steel drainage products in urban areas.
Technical Specifications
HDP drainage systems are produced to EN 1433, which defines the load class, testing method, hydraulic performance requirements, geometric tolerances, and material specifications for linear surface drainage channels. Hydraulic capacity — the volume of water the channel can carry per unit time — is determined by the internal cross-section of the channel and the effective opening area of the grating cover. Channel width is selected based on the peak flow rate for the catchment area, calculated from the drainage design.
| Parameter | Specification |
|---|---|
| Standard | EN 1433 (Linear drainage systems for surface drainage) |
| Load classes available | A15 · B125 · C250 · D400 · F900 |
| Material — channel body | High-density polymer (HDP) |
| Material — grating cover | High-density polymer (HDP) — integrated with system |
| Internal channel widths | 100 mm · 150 mm · 200 mm · 300 mm (class dependent) |
| Standard module lengths | 500 mm · 1000 mm |
| Connection method | Clip-lock or socket joint between modules |
| Chemical resistance | Resistant to acids, alkalis, salts, de-icing agents, hydrocarbons |
| Temperature range (service) | −40°C to +60°C (standard grade) |
| UV stability | UV-stabilised polymer — suitable for exposed outdoor installation |
| Surface texture — cover | Anti-slip profile standard on all load classes |
| Load class marking | Permanently marked on cover surface as required by EN 1433 |
| Certification | EN 1433 · ISO 9001 (MEA Grup manufacturing) |
HDP vs Other Drainage System Types
HDP drainage systems occupy a distinct position compared to polymer concrete, composite, and cast iron channel systems. They are lighter and more chemically resistant than polymer concrete; they cover a wider load-class range than most composite systems (which rarely exceed C250); and they are significantly lighter and easier to install than cast iron or steel-reinforced systems. The trade-off is unit cost — HDP systems are typically priced at a moderate premium over standard polymer concrete for equivalent load classes, offset by lower installation labour costs and longer maintenance-free service life.
| Factor | HDP system | Polymer concrete | Composite (GRP) | Cast iron / steel |
|---|---|---|---|---|
| Max load class | F900 | D400 | C250 | F900 |
| Weight | Low | Moderate–high | Low | High |
| Corrosion resistance | Excellent | Good | Excellent | Moderate (coating) |
| Chemical resistance | Excellent | Moderate | Excellent | Low |
| Installation speed | Fast (lightweight, modular) | Moderate | Fast | Slow (heavy) |
| Theft resistance | Excellent (no scrap value) | Good | Excellent | Poor (scrap metal) |
| Maintenance | Low — smooth bore, no coating | Low | Low | Moderate (rust, coating) |
| System integration | Fully integrated — channel and cover as one unit | Separate channel and cover | Separate channel and cover | Separate channel and cover |
Applications
HDP drainage systems are specified across a wide range of surface drainage applications — from light pedestrian landscaping at A15 to the most demanding airport apron and heavy logistics environments at F900. The consistent all-polymer construction makes them particularly well suited to environments where corrosion, chemical exposure, or theft risk would compromise the service life of metal or polymer-concrete alternatives.
Installation Overview
HDP channel systems are designed for straightforward installation by a standard groundworks team, without specialist equipment. The lightweight polymer construction allows modules to be handled by one or two operatives. The key installation steps are trench preparation, channel setting, module connection, concrete surround pouring, and cover fitting.
Excavate and prepare the trench
Excavate to the required depth, allowing for channel depth plus a minimum 100mm concrete surround below and on each side. Ensure the trench base is firm and level. Compact any loose material.
Pour the concrete bed and set the channel
Pour the concrete bed and set the first channel module at the required invert level and gradient. Use the channel's integrated anchor feet to key the unit into the concrete. Check level and gradient with a spirit level.
Connect successive modules
Connect additional channel modules using the clip-lock or socket joint system — no sealant or adhesive is required for standard installations. Install end caps and sump boxes at the required positions in the run.
Pour the concrete surround
Pour concrete around and below the channel to the finished surface level, leaving the grating frame clear. Temporary cover boards may be placed over the channel opening during concreting. Allow to cure before trafficking.
Fit the grating covers
Clip the HDP grating covers into the channel frame. For high-load (D400/F900) installations, confirm the security fixing system is correctly engaged before opening to traffic. Check that the cover surface is flush with the surrounding finished surface level.
Why Source HDP Drainage Systems from Steeling.net?
Full load-class range from one source — A15 through F900, all from MEA Grup's HDP system programme. No need to source different systems for different areas of the same project.
EN 1433 certified — All HDP systems are independently tested and certified to EN 1433. Full certification documentation provided with supply for project handover.
Complete system supply — Channel modules, grating covers, end caps, sump boxes, outlet connectors, and accessories all available from a single coordinated order.
Direct from Turkish manufacturer — MEA Grup manufactures all HDP products in Turkey. Competitive CIF pricing to European and Gulf ports with short lead times.
Free for buyers — Steeling.net charges no buyer fees or commissions. Supply proposals returned within hours of enquiry submission.
Frequently Asked Questions
What does HDP stand for in drainage systems?
HDP stands for High Density Polymer — a high-performance polymer material used to manufacture the channel body and grating cover of the drainage system. HDP drainage systems are fully polymer-based, integrated modular drainage solutions available in EN 1433 load classes from A15 (pedestrian, 15 kN) to F900 (heavy logistics and airport, 900 kN). The term distinguishes these fully polymer systems from hybrid systems that combine polymer bodies with steel or cast iron grating covers.
What is the difference between HDP drainage and polymer concrete drainage?
Polymer concrete channel bodies use a mixture of polymer resin and aggregate (similar to concrete in form and weight) — they are heavier than HDP, have moderate chemical resistance, and are typically available up to D400. HDP systems use a fully polymer construction throughout — significantly lighter, with higher chemical resistance, a wider load-class range (up to F900), and an integrated channel-and-cover system design. HDP systems generally have lower installation labour costs due to their lighter weight.
Can HDP drainage systems be used on public roads?
Yes. MEA Grup's HDP drainage systems are available in load class D400 (400 kN), which is the standard EN 1433 rating for public road and carriageway applications across most European jurisdictions. F900-rated HDP systems are also available for airport and extreme heavy-load applications. Always confirm the applicable load class specification with the local authority or project engineer before ordering.
Are HDP drainage systems suitable for food production or chemical environments?
Yes. HDP materials offer excellent resistance to most acids, alkalis, oils, cleaning chemicals, and salt solutions encountered in food production, beverage processing, and chemical handling environments. The smooth polymer bore is also easy to clean and does not harbour bacteria in the way that rougher cement-based surfaces can. Confirm chemical compatibility with the specific substances in your application before specifying for aggressive chemical environments.
What grating cover options are available for HDP systems?
MEA Grup's HDP systems use integrated polymer grating covers designed and tested as part of the complete system. This integrated approach means the cover is dimensionally matched to the channel frame, and the load class is certified for the assembly as a whole — not just the channel body or the cover individually. Alternative cover materials (steel, FRP) may be available for specific channel widths; confirm options at the enquiry stage.
What is the minimum order and lead time for HDP drainage systems?
There is no fixed minimum order quantity — Steeling.net accommodates both project-specific and recurring supply requirements. Lead times depend on the load class, channel width, and quantity required; standard items are typically available within 3–5 weeks of order confirmation including production and logistics to European ports. Exact lead time and pricing are confirmed at the enquiry stage.
Request a Quote for HDP Drainage Systems
Send your load class, channel width, run length, and project location — Steeling.net returns a competitive supply proposal with full EN 1433 certification. No fees for buyers.
Contact Us →