IEC 63132-3 pdf – Guidance for installation procedures and tolerances of hydroelectric machines – Part 3: Vertical Francis turbines or pump-turbines

IEC 63132-3 pdf – Guidance for installation procedures and tolerances of hydroelectric machines – Part 3: Vertical Francis turbines or pump-turbines
1 Scope
The purpose of this this part of lEC 63132 is to establish, in a general way,suitable proceduresand tolerances for the installation of a vertical Francis turbine or pump-turbine.This documentpresents a typical assembly and whenever the word “turbine” is used in this document, it refers
to a verticalFrancis turbine or a pump-turbine.There are many possible ways to assemble aunit. The size of the machine，design of the machine，layout of the powerhouse or deliveryschedule of the components are some of the elements that could result in additional steps, the
elimination of some steps and/or assembly sequences.
lt is understood that a publication of this type will be binding only if, and to the extent that, bothcontracting parties have agreed upon it.
This document excludes matters of purely commercial interest, except those inextricably boundup 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 specify different tolerances.
Wherever this document specifies that documents,drawings or information is supplied by amanufacturer (or by manufacturers) each individual manufacturer will furnish the appropriateinformation for their own supply only.
2Normative references
There are no normative references in this document.
3Terms and definitions
No terms and definitions are listed in this document.
lso and lEC maintain terminological databases for use in standardization at the followingaddresses:
.IEC Electropedia: available at http://www.electropedia.orgl
. ISo Online browsing platform: available at http://www.iso.org/obp
4lnstallation flowchart
4.1 Turbine embedded parts
Figure 1 shows a generic installation flowchart for Francis turbine or pumped-turbine embeddedparts.
5 steps
5.1Turbine embedded parts5.1.1Step 1: Benchmarks set-upa)Objective of work in the step
– Set-up benchmarks to be used for starting proper installation of the turbine.b)Explanation of work
– Sufficient benchmarks should be provided to establish the unit centreline,axis and
elevation.
c)RecommendationsN/A
d)Additional information
Depending on the project delivery system (EPC, design build, etc.), the benchmarks or theirreference points could be provided by the owner, civil contractor, etc. Whoever provides thebenchmarks or reference points is responsible to make sure they are correct.
The benchmark type (x, y, z coordinates， defining axis and elevations，etc.) should beagreed to prior to the work commencing.
The turbine supplier/intaller should take care to transfer the necessary benchmarksthroughout the installation and/or concreting processes so that the benchmarks remainaccessible as the unit is assembled.
5.1.2 Step 2: Primary embedded pipes and draft tube liner foundation installationa)Objective of work in the step
– Install the primary embedded pipes and steel foundations in the correct locations.b) Explanation of work
– Install the primary embedded pipes and supporting systems.- Install the foundation components of the draft tube liner.c) Recommendations
Different designs require different tolerances; therefore, it is recommended that the turbinesupplier should provide the tolerances. lt 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 machinedsurfaces of foundations during concreting.
d)Additional information
The contract should define which party is responsible to install the primary embedded pipesand/or the draft tube liner foundation components.
5.1.3Step 3: Draft tube liner foundation embedmenta)Objective of work in the step
– Embed the foundation components of the draft tube liner and the primary embedded
piping in the concrete.
b)Explanation of work
-Embed the foundation components of the draft tube liner.c)Recommendations
Care should be taken not to damage any of the embedded components or piping whenpouring concrete.
d) Additional information
N/A
5.1.4Step 4: Draft tube liner foundation and workspace verificationa) Objective of work in the step
Confirm that the draft tube liner foundations have been installed in the correct place,verifying that the draft tube pit for placing the draft tube liner is per the design and there
is sufficient access to the workplace.