The technical norm is the only Legal tool which offers the customer, the service provider and the supporter, requisites and restrictions to the elaboration and execution of an activity or the acquisition of a technical product.

In our case, we refer to the technical norms from ABNT - Brazilian Association of Technical Norms, from which we mention some below:

NBR 8890/2007 and error notice of 2008

Circular section concrete pipes for pluvial waters and sanitary sewage - Requisites and trial methods

Concrete pipes relay on an up-to-date Norm, considering all existing technology in the country and all demand of quality. Resistance classes have a new name code, in which concrete pipes destined to pluvial Waters conduction are classified as PS1 and PS2 (simple pipes) and from PA1 to PA4 (armed pipes) and those meant for sanitary residues channeling, ES (simple pipes) and from EA2 to EA4 (armed pipes).
Now, this same Norm specifies and determines methodologies for trial executions of concrete pipes characterization.

NBR 15396/2006

Pre-fabricated armed concrete staves (cell galleries) - Requisites and trial methods

This segment of concrete staves has now an updated Norm, considering all existing technology in the country and all demand of quality.

Project details and materials characteristics such as shape, dimension and tolerances, armor positions, finalizing characteristics, joint details, as well as inspection criteria, trials and parameters for staves acceptation are therein that Norm.

BR 15319/2006 and error notice of 2007

Circular section concrete pipes for inserting - Requisites and trial methods

The characteristics of materials, concrete dosing methods, pipes shaping process, finalizing characteristics, cure method, dimensions and tolerances, kinds of joints, storage instructions, identification and handling of the final product, and also criteria for inspection, trials and parameters for staves acceptation of pipes supporting lots are therein that Norm.

NBR 15645 / 2009

Execution of sanitary sewage system and pluvial waters drainage works by using concrete pipes and staves

This Norm asserts the demanding requisites for execution of sanitary sewage system and pluvial waters drainage works with pre-fabricated concrete pipes, according to specification of ABNT NBR 8890 and pre-fabricated concrete staves (cell galleries), according to specification of ABNT NBR 15396.

NBR 9648/1986

Study of conception of sanitary sewage systems

This Norm determines the conditions of the study for conception of sanitary sewage systems during the project development, specific ruling of entities responsible for sanitary sewage systems planning and development.

NBR 9649/1986

Sanitary sewage collecting nets project

This Norm determines the conditions for the elaboration of the sanitary-hydraulic project of the sanitary sewage collecting nets according to specific ruling of entities responsible for sanitary sewage systems planning and development.

NBR 9814/1987

Execution of the sanitary sewage collecting nets

This Norm determines the conditions for the construction of the sanitary sewage nets.