IEC 63132-4-2020 pdf download.Guidance for installation procedures and tolerances of hydroelectric machines – Part 4: Vertical Kaplan or propeller turbines.
The purpose of this this part of IEC 631 32 is to establish, in a general way, suitable procedures and tolerances for the installation of a vertical Kaplan or propeller turbine. This document presents a typical assembly and whenever the word “turbine” is used in this document, it refers to a vertical Kaplan or propeller turbine. There are many possible ways to assemble a unit. The size of the machine, design of the machine, layout of the powerhouse or delivery schedule of the components are some of the elements that could result in additional steps, 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. This 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 specify different tolerances. Wherever this document specifies that documents, drawings or information is supplied by a manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.
2 Normative references There are no normative references in this document.
3 Terms and definitions 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
4 Installation flowchart
4.1 Turbine embedded parts Figure 1 shows a generic installation flowchart for vertical Kaplan or propeller turbine embedded parts.
4.2 Turbine mechanical parts
Figure 2 shows a generic installation flowchart for vertical Kaplan or propeller turbine mechanical parts.
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.
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 to transfer 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: Primary embedded pipes and draft tube liner foundation installation
a) Objective of work in the step
– Install 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 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);IEC 63132-4 pdf download.