SIST EN 16903:2025

SLOVENSKI STANDARD
01-december-2025
Cevni sistemi iz polimernih materialov, ki so vkopani zunaj stavbne strukture -
Okoljske deklaracije za proizvode - Pravila za kategorije proizvodov, ki
dopolnjujejo EN 15804
Plastic piping systems buried outside the building structure - Environmental product
declarations - Product Category rules complementary to EN 15804
Erdverlegte Kunststoff-Rohrleitungssysteme außerhalb von Gebäuden -
Umweltproduktdeklarationen - Produktkategorieregeln entsprechend EN 15804
Systèmes de canalisations en plastique enterrés à l’extérieur de la structure du bâtiment
- Déclarations environnementales des produits - Règles régissant les catégories de
produits complémentaires de l’EN 15804
Ta slovenski standard je istoveten z: EN 16903:2025
ICS:
13.020.20 Okoljska ekonomija. Environmental economics.
Trajnostnost Sustainability
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 16903
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 23.040.20; 23.040.45; 91.010.99
English Version
Plastic piping systems buried outside the building
structure - Environmental product declarations - Product
category rules complementary to EN 15804
Systèmes de canalisations en plastique enterrés à Erdverlegte Kunststoff-Rohrleitungssysteme
l'extérieur de la structure du bâtiment - Déclarations außerhalb von Gebäuden -
environnementales des produits - Règles régissant les Umweltproduktdeklarationen -
catégories de produits complémentaires de l'EN 15804 Produktkategorieregeln entsprechend EN 15804
This European Standard was approved by CEN on 13 July 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16903:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 Abbreviations . 10
5 General aspects . 10
5.1 Objective of the PCR for plastic piping systems buried outside the building structure . 10
5.2 Types of EPD with respect to life cycle stages covered . 10
5.3 Comparability of EPD for construction products . 12
5.4 Additional information . 12
5.5 Ownership, responsibility and liability for the EPD. 12
5.6 Communication formats . 12
6 Product category rules for LCA . 12
6.1 Product category . 12
6.2 Life cycle stages and their information modules to be included . 12
6.2.1 General. 12
6.2.2 A1-A3, Product stage, information modules . 12
6.2.3 A4-A5, Construction process stage, information modules . 12
6.2.4 B1-B5, Use stage, information modules related to the plastic piping systems buried outside
the building structure . 12
6.2.5 B6-B7, use stage, information modules related to the operation of the plastic piping systems
buried outside the building structure . 12
6.2.6 C1-C4 End-of-life stage, information modules . 12
6.2.7 D, Benefits and loads beyond the system boundary, information module . 13
6.3 Calculation rules for the LCA . 13
6.3.1 Functional or declared unit . 13
6.3.2 Functional unit . 13
6.3.3 Declared unit . 14
6.3.4 Reference service life (RSL) . 14
6.3.5 System boundaries . 14
6.3.6 Criteria for the exclusion of inputs and outputs . 20
6.3.7 Selection of data . 20
6.3.8 Data quality requirements . 21
6.3.9 Developing product level scenarios . 21
6.3.10 Units. 23
6.4 Inventory analysis . 23
6.4.1 Collecting data . 23
6.4.2 Calculation procedures. 23
6.4.3 Allocation of input flows and output emissions . 23
6.4.4 Information on biogenic carbon content . 23
6.5 Impact assessment . 23
7 Content of the EPD . 24
7.1 Declaration of general information . 24
7.2 Declaration of environmental indicators derived from LCA . 25
7.3 Scenarios and additional technical information . 25
7.3.1 General . 25
7.3.2 Construction process stage . 25
7.3.3 B1-B7 use stage . 26
7.3.4 End-of-life . 26
7.4 Additional information on release of dangerous substances to, soil and ground water during
the use stage . 26
7.4.1 Indoor air . 26
7.4.2 Soil and ground water . 26
7.5 Aggregation of information modules . 27
8 Project report . 27
8.1 General. 27
8.2 LCA-related elements of the project report. 27
8.3 Documentation on additional information . 27
8.4 Data availability for verification . 27
9 Verification and validity of an EPD . 27
Annex A (informative) Waste . 28
A.1 End-of-waste . 28
A.2 Properties of hazardous wastes for Table 5 of EN 15804:2012+A2:2019 . 28
Annex B (informative) Examples for functional and declared units . 29
B.1 Example 1: Functional unit - Life cycle assessment of a PE piping system buried outside the
building structure for water distribution – pressure system . 29
B.2 Example 2: Functional unit -Life Cycle Assessment of a buried solid wall sewer pipe system
............................................................................................................................................................................. 31
B.3 Example 3: Declared unit -Life Cycle Assessment of a double wall plastic non-pressure
gravity pipe for surface water drainage . 33
Annex C (informative) List of product standards . 35
Annex D (informative) Applications and intended used of plastic piping systems buried outside
building structure . 37
Annex E (informative) Reading guide . 38
Bibliography . 39

European foreword
This document (EN 16903:2025) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2026, and conflicting national standards shall be
withdrawn at the latest by April 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
The European standard EN 15804+A2 specifies core product category rules for all construction products
and services. It specifies a structure to ensure that all Environmental Product Declarations (EPD) of
construction products, construction services and construction processes are derived, verified and
presented in a harmonized way.
This document, based on EN 15804+A2, specifies the Product Category Rules for Environmental Product
Declarations (EPD) plastic piping systems buried outside the building structure and their main structural
components.
An EPD communicates verifiable, accurate, non-misleading environmental information for products and
their applications, thereby supporting scientifically based, fair choices and stimulating the potential for
market-driven continuous environmental improvement.
The standardization process has taken place in accordance with EN ISO 14025. All common issues are
covered horizontally for all product types in order to minimize vertical (branch specific) deviations.
EPD information is expressed in information modules, as specified in EN 15804+A2, which allow easy
organization and expression of data packages throughout the life cycle of the plastic piping systems
buried outside the building structure (constructions work). The approach requires that the underlying
data should be consistent, reproducible and comparable.
The EPD is expressed in a form that allows aggregation (addition) to provide complete information for
construction works. This document does not deal with aggregation at the construction work level nor
does this document describes the rules for applying EPD in a construction work assessment.
The document deals with a set of quantifiable predetermined parameters defined in EN 15804+A2.
Future revisions may incorporate additional predetermined parameters in line with the changes of
EN 15804+A2.
A reading guide of this document is provided in Annex E.

1 Scope
This document specifies product category rules (PCR) for Environmental Product Declarations (EPDs),
as described in EN ISO 14025 and EN 15942.
This document is applicable to:
— functional unit as plastic piping systems buried outside building structure;
— declared unit as one or more main structural components, as specified by the list of product
standards provided in Annex C.
Main structural components are:
— pipes;
— fittings (e.g. flange couplers, bends and reducers, valves and electrofusion fittings);
— manholes, inspection chambers and infiltration boxes.
This document gives guidelines for both pressure and non-pressure applications.
The intended function of the system considered is to convey fluids according to EN 476 (for sewers, drain
and surface water), EN 805 (water supply), or EN 12007 (gas supply).
This document provides in Annex D a non-exhaustive list of application fields. In addition, the following
applications and materials are not in scope of this document: GRP pipes and fittings, and district heating
pipes.
This document specifies the rules for the product category of construction products as defined in and is
intended to be used in conjunction with EN 15804+A2.
In addition to EN 15804+A2, this document specifies:
— the functional unit (consisting of pipes, fittings, manholes and inspection chambers and ancillary
components) and declared unit (consisting of pipes and/or fittings and/or manholes and /or
inspection chambers);
— the system boundaries and additional mandatory modules to be declared;
— the processes to be included in the installation phase;
— scenarios for module A4, A5;
— use conditions for the use phase (B modules);
— reference service life (RSL);
— end of life scenarios.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
CEN/TS 1046, Thermoplastics piping and ducting systems — Outside the building structures for gravity and
pressurised systems — Trench installation
EN 476, General requirements for components used in drains and sewers
EN 805 (series), Water supply — Requirements for systems and components outside buildings
EN 12007 (series), Gas infrastructure — Pipelines for maximum operating pressure up to and including 16
bar — Part 2: Specific functional requirements for polyethylene (MOP up to and including 10 bar)
EN 15804:2012+A2:2019 , Sustainability of construction works — Environmental product declarations —
Core rules for the product category of construction products
EN 15941, Sustainability of construction works — Data quality for environmental assessment of products
and construction work — Selection and use of data
ISO 22057, Sustainability in buildings and civil engineering works — Data templates for the use of
environmental product declarations (EPDs) for construction products in building information modelling
(BIM)
ISO/TR 10501:1993, Thermoplastics pipes for the transport of liquids under pressure — Calculation of head
losses
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 15804:2012+A2:2019 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
nominal size
DN
numerical designation of the size of a component, which is a convenient round number approximately
equal to the manufacturing dimension
Note 1 to entry: Nominal size is expressed in millimetres (mm).
Note 2 to entry: This designation is not used for threaded components.

As impacted by EN 15804:2012+A2:2019/AC:2021.
3.2
design coefficient
C
coefficient with a value greater than 1, which takes into consideration service conditions as well as
properties of the components of a piping system other than those represented in σ (the lower
LPL
confidence limit)
3.3
melt mass-flow rate
MFR
value relating to the viscosity of the molten material at a specified temperature and load
Note 1 to entry: It is expressed in grams per 10 minutes (g/10 min).
3.4
nominal pressure
PN
numerical designation used for reference purposes recited to the mechanical characteristics of the
component of a piping system
Note 1 to entry: For plastic piping systems conveying water, it corresponds to the allowable operating pressure
(PFA) in bar, which can be sustained with water at 20 °C with a design basis of 50 years, and based on the minimum
design coefficient, (C)
3.5
nominal ring stiffness class
SN
numerical designation of the ring stiffness class of the pipe or fitting which is a convenient round number,
relative to the determined stiffness in kilonewtons per square meter (kN/m ), indicating the minimum
required ring stiffness of the pipe or stiffness of the fitting
3.6
building structure
building including the area within one meter of that building
3.7
biobased plastic
plastic that contains materials, wholly or partly of biogenic origin
Note 1 to entry: Although not provided as a definition this exact wording is used in the introduction of the
standards ISO 16620-1:2015, Plastics — Biobased content — Part 1: General principles (ISO 16620-1:2015, IDT)
and EN ISO 22526-1:2021, Plastics — Carbon and environmental footprint of biobased plastics — Part 1: General
principles (ISO 22526-1:2020).
Note 2 to entry: This also includes material coming from waste and residues of biological origin from agriculture,
forestry and related industries including fisheries and aquaculture, as well as the biodegradable fraction of
industrial and municipal waste (e.g. UCO, tall oil, food waste, etc.).

4 Abbreviations
For the purposes of this document, the abbreviations given in EN 15804:2012+A2:2019 apply.
5 General aspects
5.1 Objective of the PCR for plastic piping systems buried outside the building structure
Shall be according to EN 15804+A2.
5.2 Types of EPD with respect to life cycle stages covered
Shall be according to EN 15804+A2. In addition, the types of the EPDs that can be developed according to
this document are listed below (Figure 1):
— cradle to gate with options, modules C1-C4 and module D (A1-A3, C, D and additional modules. The
additional module that shall be declared is A4, A5 is optional). This type of EPD shall be based on a
declared unit and applies for the main structural components listed in the Scope;
— cradle to gate with options, modules C1-C4 and module D (A1-A3, C, D and additional modules. The
additional module that shall be declared is A4, A5 and/or B1–B7 are optional.). This type of EPD shall
be based on a functional unit or a declared unit. If B-modules and use scenario are not declared the
EPD shall be based on a declared unit; see 6.3.5.4.2 for the definition of B-modules in case of pressure
applications;
— cradle to grave and module D (A, B, C and D). This declaration shall be based on a functional or
declared unit.
Key
1 replacement of components, parts or systems
Figure 1 — Types of EPD with respect to life cycle stages covered and life cycle stages and modules for the construction works
assessment
5.3 Comparability of EPD for construction products
Shall be according to EN 15804+A2.
5.4 Additional information
Shall be according to EN 15804+A2.
5.5 Ownership, responsibility and liability for the EPD
Shall be according to EN 15804+A2.
5.6 Communication formats
Shall be according to EN 15804+A2.
6 Product category rules for LCA
6.1 Product category
Shall be according to EN 15804+A2, and in addition the product category referred to in this document
includes all plastic piping systems buried outside building structure and their main structural
components conveying fluids according to EN 476 (for sewers, drain and surface water), EN 805 (water
supply), or EN 12007 (gas supply).
A more detailed definition of plastic piping system buried outside building structure and their main
structural components is provided in the Scope and Annex D, Table D.1.
6.2 Life cycle stages and their information modules to be included
6.2.1 General
Shall be according to EN 15804+A2.
6.2.2 A1-A3, Product stage, information modules
Shall be according to EN 15804+A2.
6.2.3 A4-A5, Construction process stage, information modules
Shall be according to EN 15804+A2.
6.2.4 B1-B5, Use stage, information modules related to the plastic piping systems buried outside
the building structure
Shall be according to EN 15804+A2. In addition see 6.3.5.4.2.
6.2.5 B6-B7, use stage, information modules related to the operation of the plastic piping
systems buried outside the building structure
Shall be according to EN 15804+A2. In addition, for pressure applications the energy consumption shall
be calculated according to formula for head loss provided in ISO/TR 10501:1993 (Clause 4). The energy
consumption shall be calculated taking into consideration the head loss, the lifetime and the pump
efficiency. Default values to be used in the calculation are reported in 6.3.9.4.
6.2.6 C1-C4 End-of-life stage, information modules
Shall be according to EN 15804+A2.
6.2.7 D, Benefits and loads beyond the system boundary, information module
Shall be according to EN 15804+A2.
6.3 Calculation rules for the LCA
6.3.1 Functional or declared unit
Shall be according to EN 15804+A2.
6.3.2 Functional unit
Shall be according to EN 15804+A2, and in addition the functional unit is based on the function of
conveying a certain amount of fluid performed by the plastic piping system in the construction work and
on the RSL of the system, which depends on the intended use of the piping system. The functional unit is
specified in function of the application of the product in the construction work.
The functional unit is defined, based on a real case scenario, as the total weight related to a typical
installed and backfilled plastic piping system, which consists at least of the main components declared in
Scope (pipes, fittings, manholes, inspection chambers or infiltration boxes) over a specified distance in
metres, with a specified inner diameter, that fulfils specified quality criteria given in European standards
during the life span of the construction works.
For describing the functional unit, the following technical specifications shall be reported in the EPD:
— for pipes: inner diameter (DN - mm), pressure rating (PN) for pressure pipes; stiffness class (SN) for
non-pressure pipes, SDR ratio (when applicable), material(s) and its/their specific performance(s);
— for fittings: inner diameter (DN – mm), pressure rating (PN) for pressure pipes; material(s) and
its/their specific performance(s), type (coupler/bend/elbow, T piece, etc.). In case of fittings with
multiple inner diameters (i.e. T-pieces or reducers), both diameters shall be reported;
— for manholes, inspection chambers and infiltration boxes: inner diameter (DN - mm), stiffness class
(SN); material, height of riser. In case of manholes with multiple inner diameters (i.e. manholes with
different diameters of the inlets in the bottom part), both diameters shall be reported. In case of
infiltration boxes: load class, dimensions and volume;
— for ancillary components (i.e. sealing rings, metallic flanges): material, pressure rating (PN), type.
Other technical specifications may be included to better characterize the analysed system (i.e. for
pressure applications: barrier properties, material resistance to disinfections, crack resistant materials,
corrosion resistance of flanges and bolts, for non-pressure applications: crack resistant materials;
manholes with design to prevent lift in high ground water levels).
If a functional unit is addressed in the EPD, a conversion factor shall be reported in the EPD to make it
possible to recalculate the environmental performance to 1 m length (in case of pipe). In case of fittings,
manholes, inspection chambers and infiltration boxes multiple conversion factors to piece(s) maybe
applicable.
NOTE 1 Multiple conversion factors are taking into account the different shape of fittings, manholes and
infiltration boxes, e.g. couplers, elbows, T-pieces, etc.
A mix of different dimensions of pipes and fittings is allowed and shall be declared in the EPD. In case of
(n) multiple diameters, the conversion factors from mass to 1 m length shall be declared for each
diameter declared. In case of fittings, manholes, inspection chambers and infiltration boxes multiple
conversion factors to piece(s) may be applicable.
In Annex B examples of a typical water pressure system and a sewer system are described. The systems
can be scaled to any size.
NOTE 2 The design and installation details for plastic pipe systems buried outside building structure can be
found in EN 1610 [1], CEN/TS 15223 [2] and CEN/TS 1046 respectively.
6.3.3 Declared unit
Shall be according to EN 15804+A2, and in addition the declared unit is defined as a specified mass of a
plastic piping system buried outside building structure or one of its main structural components,
expressed in mass, that fulfils specified quality criteria given in European standards during the life span
of the construction work.
The definition of buried outside building structure is not applicable in case the system boundaries are set
from cradle-to-gate (see 5.2).
The main structural components of a plastic piping system buried outside building structure are defined
in the Scope.
The applicable technical specifications for the analysed declared unit listed in 6.3.2 shall be reported in
the EPD.
In case a plastic piping system (including several main structural components) or a pipe is selected as
declared unit, a conversion factor from mass to length (for pipes) and piece(s) (for the other main
structural components) shall be given in the EPD.
In case the declared unit is defined as plastic piping system (with several main components) the
calculation of the mass shall be performed starting from a specific design (project-specific) and the main
components accounted for shall be declared in the EPD.
In case a fitting, manhole, inspection chamber or infiltration box is selected as declared unit a conversion
factor from mass to piece(s) shall be given in the EPD.
6.3.4 Reference service life (RSL)
6.3.4.1 General
Shall be according to EN 15804+A2.
NOTE The reference service life of plastic piping system buried outside the building structure is dependent on
the design and the installation requirements.
6.3.4.2 Scenarios for RSL and functional unit
Shall be according to EN 15804+A2 and in addition, the RSL information to be declared in an EPD shall
be provided by the manufacturer with reference to supporting documentation.
6.3.5 System boundaries
6.3.5.1 General
Shall be according to EN 15804+A2.
6.3.5.2 Product stage
Shall be according to EN 15804+A2. In addition, the following processes shall be included:
— production and processing of raw materials, processing of secondary materials (e.g. recycling) for
the plastic pipes, fittings and other main components defined in the Scope, including additives such
as stabilisers, fillers, impact modifiers, colourants and other materials added to the main resin;
— transport of plastic pipe or fittings raw materials to converter;
— converting process for pipes (extrusion);
— converting process for fittings (injection moulding, extrusion);
— converting process for manholes, inspection chambers and infiltration boxes (injection moulding,
rota moulding and blow moulding, etc.);
— production and processing of the raw materials, processing of secondary materials (e.g. recycling)
for the accessory components of the plastic piping system buried outside building structure (e.g.
sealing rings, flanges, electro couplers, wells for measuring equipment, rubber gaskets, metal thread
wire, adhesive, etc.);
— transport of the raw materials for the accessory components to the manufacturing phase;
— production of the auxiliary products used in the product stage;
— production of lubricants used for fittings;
— manufacturing of primary and secondary packaging used for the different components of the plastic
piping system (i.e. end caps, plastic bag, wrapping film);
— production of the electricity and fuel used in the product stage (see 6.3.7.2);
— refrigerant gas losses in the manufacturing stage(s);
— treatment of waste and wastewater up to the end-of-waste generated by all the product stage
processes (see Annex A for guidance when end-of-waste stage is reached).
In case plastics from biobased materials are part of the product system (even in combination with fossil-
based plastics) the following processes shall be included:
— growing and harvesting of biobased resources (e.g. agricultural planting);
— refining, transfer and storage of extracted or harvested resources into feedstock for production (e.g.
starches, cellulose);
— monomers production;
— intermediate raw materials production (e.g. pre-polymers, etc.);
— transformation process from first generation feedstock to be used in the new product system (e.g.
waste vegetable oil)
Other product stage processes not listed above may also be included. All elementary flows at
resource extraction shall be included, except for the flows that fall under the general cut-off rule in
6.3.6.
The output of waste during this life cycle stage may reach the end-of-waste state when it complies with
the conditions described in 6.3.5.5 and Annex B of EN 15804:2012+A2:2019 end-of-life stage. They are
then treated as secondary materials and fuels and shall not be allocated any impacts.
6.3.5.3 Construction stage
Shall be according to EN 15804+A2. In addition, a list of the processes that shall be included at minimum
in the installation phase is provided below:
— for A4, transport to the construction site, a scenario shall be developed that accounts for: distance
from the manufacturing site(s) to the construction site where the analysed system is installed, the
vehicle’s size, the capacity utilization and volume capacity utilization factor. In case that specific data
is unavailable, the scenarios reported in 6.3.9.2 shall be used;
NOTE 1 For the definition of the A4 scenario, the preferred choice is to use average specific data retrieved
directly from the manufacturer(s) based on calculated mean distance on a representative sample of products
sold in a specific year or a wider timeframe.
— the installation phase (A5) includes all materials and activities connected to the installation of the
plastic piping system buried outside building structure at the construction site. The requirements for
the installation scenario are dependent on the application area of the piping system, the pipeline
diameter, the numbers of pipes in one trench, the location of the trench and the materials used in the
piping system. A list of the processes that shall be included in the installation phase is provided
below. Exclusions shall be justified:
— excavation of the trench; the installation method shall be specified, e.g. open trench, no-dig or
the use of trench boxes in urban areas;
— laying the main structural components and the accessory ones according to the specific
requirements;
— transport of the excavated soil to the depot;
— manufacturing and transportation of lubricants and soap for the sockets;
— transport of the bedding and backfilling materials from the depot or mine;
— fuel and energy consumption related to the use of construction machinery (i.e. drilling,
backfilling, stamper -jointing of the pipes: butt welding or electrofusion-, vibration plate;
compaction of bedding and backfilling);
— water required for the installation (cleaning and testing);
— manufacturing of the buried plastic piping system components to compensate for the losses
generated at the installation stage;
NOTE 2 When setting system boundaries the general principle of EN 15804+A2 is to consider all
processes in the modules where they occur, see CEN/TR 16970.
— transport of the packaging waste to the final End-of-Life treatment.
— processing of the construction waste up to the end-of-waste state or disposal of the final residues
(see Annex A for guidance when end-of-waste stage is reached).
The installation scenario shall be defined according to the technical specifications reported in
CEN/TS 1046. In case of unavailability of context-specific generic data the indication reported in 6.3.9.3
shall be followed.
The volume of the trench and the amount of local excavated mass and gravel used shall be documented.
When local mass cannot be used, production and transport of gravel shall be included, in addition to the
transport of local mass to landfill.
Waste handling scenarios shall be developed consistently with the waste handling of other lifecycle
stages (i.e. end-of-life stage).
6.3.5.4 Use stage
— B1 Use of the installed product in terms of any emissions to the environment (not covered by B2-
B7);
Shall be according to EN 15804+A2.
6.3.5.4.1 General
Shall be according to EN 15804+A2, and in addition: The installation of plastic piping systems buried
outside building structure shall follow the technical specifications reported in CEN/TS 1046.
6.3.5.4.2 B1-B5 Use stage information modules of the piping system
Shall be according to EN 15804+A2.
— B1 Use of the installed product in terms of any emissions to the environment (not covered by B2-
B7)
Shall be according to EN 15804+A2.
— B2 Maintenance
Shall be according to EN 15804+A2. In addition, during the reference service life of the plastic piping
system buried outside the building structure, no ordinary maintenance activities are expected,
therefore a zero-impact scenario is considered (extraordinary maintenance is excluded). If a
maintenance scenario is accounted for (e.g. for flushing and cleaning activities), it shall be well
documented, justified and explained in the LCA project report.
In case hazardous or toxic materials are used during flushing or cleaning activities the requirements
reported in 6.3.9.4 apply.
— B3 Repair
Shall be according to EN 15804+A2. In addition, during the reference service life of the plastic piping
system buried outside the building structure, no ordinary repair activities are expected, therefore a
zero-impact scenario is considered (extraordinary repairment is excluded). If a repair scenario is
accounted for, it shall be well documented, justified and explained in the LCA project report.
— B4 Replacement
Shall be according to EN 15804+A2. In addition, during the reference service life of the plastic piping
system buried outside building structure, no ordinary replacement activities are expected, therefore
a zero-impact scenario is considered. If a repair scenario during the expected RSL of the system, this
should be dealt with in B4 and not in C modules. In case a replacement is accounted for, it shall be
well documented, justified and explained in the LCA project report. All the steps of the installation
shall be taken into account.
— B5 Refurbishment
Shall be according to EN 15804+A2. In addition, during the reference service life of the plastic piping
system buried outside the building structure, no ordinary refurbishment is expected, therefore a
zero-impact scenario is considered. If a refurbishment scenario is accounted for, it shall be well
documented, justified and explained in the LCA report. All the steps of the installation shall be taken
into account
6.3.5.4.3 B6 – B7 Use stage information modules related to the operation of the piping system
Shall be according to EN 15804+A2. In addition, for pressure systems the energy consumption to
head loss shall be taken into account (see 6.2.5 and 6.3.9.4). For operational water use, all the
components of the plastic piping system buried outside the building structure are tested to prevent
fluid leakage, therefore no ordinary operational water consumption is expected.
6.3.5.5 End-of-life stage
Shall be according to EN 15804+A2. In addition, three possible alternative end-of-life scenarios
(EoLs) are applicable to a piping system or main structural components:
— leave the system in the ground;
— replacement of an existing system with a new one;
— digging up of the existing plastic piping system buried outside the building structure.
Only one of the above-listed scenarios shall be declared in the EPD and it shall be the most realistic and
the representative one for the analysed product system.
In the future additional option(s) for end of life scenario may be eligible.
In addition, any possible biogenic carbon contained in the products shall be treated in accordance with
6.3.5.5 of EN 15804:2021+A2:2019.
In case that the “left in ground” scenario is selected the following shall be taken into account:
— the decommissioning of the system;
— any additional e
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