“Achieving excellence in processes and products, aiming for better results and customer satisfaction.”
For those who specify or hire technical piping, quality is not a sales argument — it’s a project requirement. This page documents the standards we comply with by product line, the tests we perform on each batch, and what you can request to prove it.
Compliance by product line
Techduto manufactures two technical lines with specific standards — drainage and cable protection — in addition to special lines for high-demand applications. Each line has its own normative references.
| Product Line | Products | Applicable Standards | Classes / Scope |
|---|---|---|---|
| Agricultural and road drainage | Techdreno, Techdreno DW, Techdreno KC | ABNT NBR 15073 · DNIT 093/2016 | SN4 and SN8 · DN 50 to DN 250 mm |
| Cable and conduit protection | Techduto NBR, Techduto DW | ABNT NBR 15715 | DN 20 to DN 250 mm |
| AC — Anti-Flame Line | Techduto NBR AC | NBR 15715 + anti-flame certification | Photovoltaic installations with flame retardancy requirements |
| UV — Solar Exposure Line | Techduto NBR UV | NBR 15715 + improved UV formulation | Solar trackers and aerial installations with high exposure |
| Raw material and process | All lines | ISO 1133 (MFI) · ISO 9001 (management) | Control by load · Periodic process audit |
NBR 15715 — the standard we helped create
The ABNT NBR 15715 defines the quality requirements for flexible corrugated PEAD pipes for cable protection in underground and aerial installations — DN 20 to DN 250 mm.
Techduto actively participated in the development of this standard. With decades of corrugated pipe production even before the Brazilian standard existed, our processes and products were a reference for defining the parameters that the standard consecrated. When you specify NBR 15715, you are describing exactly the product we manufacture.
NBR 15073 and DNIT 093/2016 — drainage with specified stiffness class
The ABNT NBR 15073 establishes the requirements for PEAD corrugated pipes for drainage and sewage in non-pressurized conditions — the technical reference standard for Techdreno and its variants.
The DNIT 093/2016 complements with specific requirements for drainage in road infrastructure works — requiring proof of load supported by stiffness class.
Circumferential stiffness classes (SN)
The stiffness class defines the pipe’s resistance to external load and determines the installation depth and type of traffic supported. Specifying the correct class is the designer’s responsibility:
| Class | Minimum stiffness | Typical application | Recommended depth |
|---|---|---|---|
| SN4 | 4 kN/m² | Agricultural drainage, areas without heavy traffic | Up to 2 m |
| SN8 | 8 kN/m² | Road drainage, areas with heavy vehicle traffic | Up to 4 m or with traffic load |
Techdreno is available in both classes (SN4 and SN8) in diameters from DN 50 to DN 250 mm, in coils or bars of 6 and 12 meters.
What you receive with each order
- Technical report available per batch — unique identification with production date, machine, shift, operator, and results of mandatory tests. Requestable at any time for work documentation or audit
- Consistency between units — own laboratory in the four manufacturing units (SJC, Recife, Petrolina, Primavera do Leste): the product manufactured in the Northeast meets exactly the same standard as the one in São Paulo
- Controlled raw material at source — the melt flow index (MFI) of each PEAD resin load is verified before extrusion by ISO 1133. Quality starts before the product exists
- Full traceability — each coil has a unique code that enables root cause analysis in the field, post-installation technical support, and retrospective audit
- Proven service life: 75 years (cable protection) and 50 years (drainage) — result of accelerated aging studies and real installation history with decades in the field
Process control and testing by line
| Test | Normative reference | Line | Frequency |
|---|---|---|---|
| Ring compression resistance | NBR 15715 · NBR 15073 | All | Per batch |
| Impact resistance | NBR 15715 · NBR 15073 | All | Per batch |
| Dimensional control (DN, thickness) | NBR 15715 · NBR 15073 | All | Continuous in-line |
| Circumferential stiffness (SN4 / SN8) | NBR 15073 · DNIT 093/2016 | Drainage | Per batch |
| Longitudinal flexibility | Internal procedure | All | Daily |
| Melt flow index — MFI | ISO 1133 | All | Per raw material load |
| Marking and traceability verification | NBR 15715 · NBR 15073 | All | 100% of batches |
| Flame retardancy | NBR 15715 + AC specification | AC Line | Per batch |
Requesting technical report or conformity certificate
Batch test reports, conformity declarations with NBR 15715 or NBR 15073, technical sheets, and traceability documentation are available upon request:
- Email: qualidade@techduto.com.br
- Phone: (12) 3202-1096
Provide the order number or the identification printed on the pipe marking (batch, DN, date) to expedite service.