IEC 63132-6:2023

Guidance for installation procedures and tolerances of hydroelectric machines - Part 6: Vertical Pelton turbines

IEC 63132-6:2023 is to establish, in a general way, suitable procedures and tolerances for the installation of Pelton vertical turbines. This document presents a typical assembly and whenever the word "turbine" is used in this document, it refers to a vertical Pelton turbine. There are many possible ways to assemble a unit. The size of the machine, the design of the machine, the layout of the powerhouse or the delivery schedule of the components are some of the elements that could result in additional steps, or the elimination of some steps and/or assembly sequences.

Lignes directrices des procédures et tolérances d’installation des machines hydroélectriques - Partie 6: Turbines Pelton verticales

IEC 63132-6:2023 a pour objet d’établir, d’une manière générale, des procédures et des tolérances appropriées pour l’installation des turbines verticales Pelton. Ce document présente un assemblage typique et chaque fois que le mot « turbine » est utilisé dans ce document, il fait référence à une turbine Pelton verticale. Il existe de nombreuses façons d’assembler une unité. La taille de la machine, la conception de la machine, la disposition de la centrale ou le calendrier de livraison des composants sont quelques-uns des éléments qui pourraient entraîner des étapes supplémentaires ou l’élimination de certaines étapes et / ou séquences d’assemblage

General Information

• Status: Published
• Publication Date: 13-Apr-2023
• ICS: 27.140 - Hydraulic energy engineering
• Technical Committee: TC 4 - Hydraulic turbines
• Drafting Committee: WG 30 - TC 4/WG 30
• Current Stage: PPUB - Publication issued
• Start Date: 12-May-2023
• Completion Date: 14-Apr-2023

Standards Content (Sample)

IEC 63132-6
®

Edition 1.0 2023-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Guidance for installation procedures and tolerances of hydroelectric machines –
Part 6: Vertical Pelton turbines

Lignes directrices des procédures et tolérances d’installation des machines
hydroélectriques –
Partie 6: Turbines Pelton verticales

IEC 63132-6:2023-04(en-fr)

---------------------- Page: 1 ----------------------
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IEC 63132-6

®


Edition 1.0 2023-04




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE
colour

inside










Guidance for installation procedures and tolerances of hydroelectric machines –

Part 6: Vertical Pelton turbines



Lignes directrices des procédures et tolérances d’installation des machines

hydroélectriques –

Partie 6: Turbines Pelton verticales















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 27.140 ISBN 978-2-8322-6782-0




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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– 2 – IEC 63132-6:2023 © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative reference . 6
3 Terms and definition . 6
4 Installation flowchart . 7
4.1 Turbine embedded parts . 7
4.2 Turbine mechanical parts . 8
5 Steps . 9
5.1 Turbine embedded parts . 9
5.1.1 Step 1: Benchmarks set-up . 9
5.1.2 Step 2: Installation of turbine housing foundations and embedded pipes . 9
5.1.3 Step 3: Turbine housing foundations embedment. 10
5.1.4 Step 4: Turbine housing foundation and workspace verification . 10
5.1.5 Step 5: Handing over to installation . 10
5.1.6 Step 6: Installation of the turbine housing . 10
5.1.7 Step 7: Handing over to concreting phase. 12
5.1.8 Step 8: Distribution pipe foundations embedment . 12
5.1.9 Step 9: Handing over to installation . 12
5.1.10 Step 10: Installation of the distribution pipe . 13
5.1.11 Step 11: Secondary embedded pipes installation around turbine housing
and distribution pipe . 14
5.1.12 Step 12: Distribution pipe pressurization and test . 14
5.1.13 Step 13: Handing over to concreting phase . 15
5.1.14 Step 14: Turbine housing and distribution pipe embedment . 15
5.1.15 Step 15: Handing over to installation . 16
5.1.16 Step 16: Turbine housing and distribution pipe dimensional inspection
after embedment . 16
5.1.17 Step 17: Installation of turbine housing cover . 16
5.1.18 Step 18: Installation of guide bearing support bracket . 17
5.1.19 Step 19: Handing over to concreting phase . 18
5.1.20 Step 20: Embedment up to generator floor . 18
5.1.21 Step 21: Handing over to installation . 18
5.1.22 Step 22: Guide bearing support bracket dimensional inspection after
embedment . 19
5.1.23 Step 23: Corrosion protection for embedded parts . 19
5.1.24 Step 24: Turbine embedded parts complete . 19
5.1.25 Step 25: Turbine mechanical parts Installation . 19
5.2 Turbine mechanical parts . 19
5.2.1 Step 1: Turbine embedded parts complete . 19
5.2.2 Step 2: Installation of turbine guide bearing housing . 19
5.2.3 Step 3: Installation of turbine shaft . 20
5.2.4 Step 4: Turbine shaft free . 20
5.2.5 Step 5: Generator installation . 21
5.2.6 Step 6: Unit alignment . 21
5.2.7 Step 7: Turbine guide bearing assembly and adjustment . 22
5.2.8 Step 8: Installation of rail system for turbine parts transportation . 22
5.2.9 Step 9: Installation of nozzles . 22

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IEC 63132-6:2023 © IEC 2023 – 3 –
5.2.10 Step 10: Installation of deflector systems . 23
5.2.11 Step 11: Installation of water guide shield . 24
5.2.12 Step 12: Installation of turbine runner . 24
5.2.13 Step 13: Remaining turbine parts installation completion . 24
5.2.14 Step 14: Cleaning, painting and inspection before initial tests . 25
5.2.15 Step 15: Turbine mechanical parts complete . 25
5.2.16 Step 16: Commissioning . 25
Bibliography . 26

Figure 1 – Generic installation flowchart – Pelton turbine embedded parts . 7
Figure 2 – Generic installation flowchart – Pelton turbine mechanical parts . 8
Figure 3 – Turbine housing installation . 11
Figure 4 – Distribution pipe installation . 13
Figure 5 – Nozzles installation . 23

Table 1 – Turbine housing measurements . 11
Table 2 – Distribution pipe measurements . 14
Table 3 – Turbine housing cover measurements . 17
Table 4 – Guide bearing support bracket measurements . 17
Table 5 – Shaft measurements . 20
Table 6 – Unit alignment measurements . 21
Table 7 – Nozzles measurements . 23

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– 4 – IEC 63132-6:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

GUIDANCE FOR INSTALLATION PROCEDURES AND
TOLERANCES OF HYDROELECTRIC MACHINES –

Part 6: Vertical Pelton turbines

FOREWORD
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rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 63132-6 has been prepared by IEC technical committee 4: Hydraulic turbines. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
4/457/FDIS 4/465/RVD

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.

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IEC 63132-6:2023 © IEC 2023 – 5 –
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63132 series, published under the general title Guidance for
installation procedures and tolerances of hydroelectric machines, can be found on the IEC
website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

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– 6 – IEC 63132-6:2023 © IEC 2023
GUIDANCE FOR INSTALLATION PROCEDURES AND
TOLERANCES OF HYDROELECTRIC MACHINES –

Part 6: Vertical Pelton turbines



1 Scope
The purpose of this document is to establish, in a general way, suitable procedures and
tolerances for the installation of Pelton vertical turbines. This document presents a typical
assembly and whenever the word "turbine" is used in this document, it refers to a vertical Pelton
turbine. There are many possible ways to assemble a unit. The size of the machine, the design
of the machine, the layout of the powerhouse or the delivery schedule of the components are
some of the elements that could result in additional steps, or the elimination of some steps
and/or assembly sequences.
It is understood that a publication of this type will be binding only if, and to the extent that, both
contracting parties have agreed upon it.
The document excludes matters of purely commercial interest, except those inextricably bound
up with the conduct of installation.
The tolerances in this document have been established upon best practices and experience,
although it is recognized that other standards are specifying different tolerances.
Wherever the document specifies that documents, drawings or information are supplied by a
manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate
information for their own supply only.
2 Normative reference
There are no normative references in this document.
3 Terms and definition
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

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IEC 63132-6:2023 © IEC 2023 – 7 –
4 Installation flowchart
4.1 Turbine embedded parts
Figure 1 shows a generic installation flowchart for Pelton turbine embedded parts.

Figure 1 – Generic installation flowchart – Pelton turbine embedded parts

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– 8 – IEC 63132-6:2023 © IEC 2023
4.2 Turbine mechanical parts
Figure 2 shows generic installation flowchart for Pelton turbine mechanical parts.

Figure 2 – Generic installation flowchart – Pelton turbine mechanical parts

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IEC 63132-6:2023 © IEC 2023 – 9 –
5 Steps
5.1 Turbine embedded parts
5.1.1 Step 1: Benchmarks set-up
a) Objective of work in the step
– Set-up benchmarks to be used for starting proper installation of the turbine and
generator.
b) Explanation of work
– Sufficient benchmarks should be provided to establish the unit centreline, axis and
elevation.
c) Recommendations
N/A
d) Additional information
Depending on the project delivery system (EPC, design build, etc.), the benchmarks or their
reference points could be provided by the owner, civil contractor, etc. Whoever provides
the benchmarks or reference points is responsible to make sure they are correct.
The benchmark type (x, y, z coordinates, defining axis and elevations, etc.) should be
agreed to prior to the work commencing.
The turbine supplier should take care of transferring the necessary benchmarks throughout
the erection and/or concreting processes so that the benchmarks remain accessible as the
unit is assembled.
5.1.2 Step 2: Installation of turbine housing foundations and embedded pipes
a) Objective of work in the step
– Install primary embedded pipes and turbine housing foundations in the correct locations.
b) Explanation of work
– Install the primary embedded pipes and supporting systems.
– Install the foundation components for turbine housing and rail system for turbine parts
transportation etc.
c) Recommendations
Different designs require different tolerances; therefore, the turbine supplier should provide
the tolerances. It is considered as a best practice to perform:
– NDT as applicable (i.e. visual inspections, pressure tests of the piping, test of welding
seams);
– measures to prevent the concrete from entering the pipes or contaminating the machined
surfaces of foundations during concreting.
d) Additional information
The contract should define which party is responsible to install the primary embedded pipes
and/or the foundation components.
Depending on the design, the rail system for turbine parts transportation may not require
foundation components.
Depending on the size of unit, a support column for platform might be installed in the water
passage below the turbine housing.

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– 10 – IEC 63132-6:2023 © IEC 2023
5.1.3 Step 3: Turbine housing foundations embedment
a) Objective of work in the step
– Embed the turbine housing foundations and the pipes in primary concrete.
b) Explanation of work
– Embed the foundation components for turbine housing and rail system for turbine parts
transportation etc.
c) Recommendations
Care should be taken not to damage any of the embedded components or piping when
pouring concrete.
d) Additional information
Depending on the design, the rail system for turbine parts transportation may not require
the foundation components.
Depending on the size of unit, a support column for platform might be embedded in the
water passage below the turbine housing.
5.1.4 Step 4: Turbine housing foundation and workspace verification
a) Objective of work in the step
– Confirm that the turbine housing foundation has been installed in the correct place,
verifying that it is per the design and there is sufficient access to the workplace.
b) Explanation of work
– Once the workplace is acceptable, the turbine installation work can start.
c) Recommendations
Check that the foundation components of the turbine housing were installed within the
tolerances provided by the turbine supplier.
d) Additional information
N/A
5.1.5 Step 5: Handing over to installation
a) Objective of work in the step
– Transfer the workspace to the turbine supplier/installer.
b) Explanation of work
– There is normally an official transfer of the working area of the turbine housing from the
civil contractor to the turbine supplier/installer. Typically, the transfer is documented with
some type of signed form.
c) Recommendations
N/A
d) Additional information
N/A
5.1.6 Step 6: Installation of the turbine housing
a) Objective of work in the step
– Install the turbine housing (see Figure 3).
b) Explanation of work
– Transport the turbine housing segments to the foundation and place them on the
supports.
– Tack-weld of the turbine housing segments.
– Inspect the alignment and principal dimensions of the turbine housing before welding.
– Weld the turbine housing.

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IEC 63132-6:2023 © IEC 2023 – 11 –
– Inspect the alignment and principal dimensions of the turbine housing after welding.
– Install the inspection platform.
c) Recommendations
The items showed in Table 1 should be checked.

Figure 3 – Turbine housing installation
Table 1 – Turbine housing measurements
Minimum no. of
Item Tolerance Measurement location
measurements
To be determined by Inside walls of turbine
Concentricity Number of nozzles
turbine supplier housing
To be determined by Orientation of turbine
Orientation in plan 1
turbine supplier housing
To be determined by Top surface of turbine
Elevation Number of nozzles
turbine supplier housing
To be determined by Top surface of turbine
Level Number of nozzles
turbine supplier housing

– NDT of the welding seams
– Proper fixation of the turbine housing.
In addition to the above requirements, principal dimensions should be checked.
The tolerances and measurement locations of the principal dimensions are indicated in
turbine supplier drawings.
The turbine housing should be set concentric to the theoretical unit axis (benchmark) and
centreline.

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– 12 – IEC 63132-6:2023 © IEC 2023
d) Additional information
The sequence for the installation of the turbine housing should be provided by the turbine
supplier.
Adequate supports or bracing are required to prevent the turbine housing from moving or
changing shape during placing of the secondary concrete.
5.1.7 Step 7: Handing over to concreting phase
a) Objective of work in the step
– Transfer the workspace to the civil contractor.
b) Explanation of work
– The turbine supplier should confirm that the turbine housing has been installed and
aligned properly and is ready for concreting.
– There is normally an official transfer of the working area of the turbine housing from the
turbine supplier to the civil contractor. Typically, the transfer is documented with some
type of signed form.
c) Recommendations
N/A
d) Additional information
N/A
5.1.8 Step 8: Distribution pipe foundations embedment
a) Objective of work in the step
– Install and embed distribution pipe foundations.
b) Explanation of work in the step
– Install the distribution pipe foundations.
– Embed the distribution pipe foundations and lower section of turbine housing.
c) Recommendations
– The concrete pour rate, pour/step heights and allowable differential levels should be
agreed among the concerned parties during the early stages of project development,
due to the critical impacts (to schedule and costs) related to the design and installation
of the turbine housing.
d) Additional information
Care should be taken when pouring concrete not to damage any of the embedded
components or piping.
5.1.9 Step 9: Handing over to installation
a) Objective of work in the step
– Transfer the workspace to the turbine supplier/installer.
b) Explanation of work
– There is normally an official transfer of the working area from the civil contractor to the
turbine supplier/installer. Typically, the transfer is documented with some types of signed
form.
c) Recommendations
N/A
d) Additional information
N/A

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IEC 63132-6:2023 © IEC 2023 – 13 –
5.1.10 Step 10: Installation of the distribution pipe
a) Objective of work in the step
– Install the distribution pipe (see Figure 4).
b) Explanation of work
– Transport and assemble distribution pipe segments.
– Align distribution pipe flanges (elevation, orientation, distance and offset).
– Install and weld steel plates between distribution pipe flanges to turbine housing.
c) Recommendations
The items showed in Table 2 should be checked.

Figure 4 – Distribution pipe installation

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– 14 – IEC 63132-6:2023 © IEC 2023
Table 2 – Distribution pipe measurements
Minimum no. of
Item Tolerance Measurement location
measurements
To be d
...