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Following standard pipe types are available in the Hysopt software.
Normal pipes
Steel pipes (welded): NBN EN 10255
Steel pipes (precision): NBN EN 10305-1 and NBN 10305-2
Copper pipes: NBN EN 1057
Multilayer: NBN EN ISO 21003-2
Epoxy
HDPE 100 SDR 11
Heat network pipes
External steel pipes : Cibse CIBSE CP1
External PEX pipes : Cibse CIBSE CP1
You can change the pipe type when selecting a pipe on the canvas.
You can add custom pipe types if desired via the https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#Pipe-settings
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WTCB / Buildwise (Belgium)
based on report 14 https://www.buildwise.be/nl/publicaties/dimensioneringsmethodes/14/
default
using a “maximum pressure drop per meter“ criterium
ISSO (Netherlands)
based on publication 18 https://open.isso.nl/publicatie/isso-publicatie-18-leidingnetberekening/2012?query=publicatie+18
using the “gradual speed reduction“ method, a combination of the “maximum pressure drop per meter“ and “maximum velocity“ criterium as explained in the standard
be aware that the standard allows you to deviate from the currently used values, as explained in https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#ISSO
Cibse CIBSE (UK)
based on heat network code of practice (CP1) https://www.cibse.org/knowledge-research/knowledge-portal/heat-networks-code-of-practice-for-the-uk-cp1-2020only available via custom upload, see https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#CIBSE-guide-CP1-(2020)-for-pipe-sizing-(underground-pipe-network)
using a “maximum velocity“ criterium as explained in https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#CIBSE-guide-CP1-(2020)-for-pipe-sizing-(underground-pipe-network)
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The ISSO standard allows three types of selection criteria:
Constant speed (constante speedsnelheid)
contstant Constant friction or constant pressure drop (constante wrijving)
gradual Gradual speed reduction (geleidelijke snelheidsreductie)
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If you select the ISSO standard, by default the method of gradual speed reduction is used. It’s important to know that the ISSO standard allows you to deviate, and change the method, or change the default values, and you are free to modify the values for these tipping points according to your experience or according to the situation. You are also free to introduce extra tipping points and add an extra switch between constant speed and constant friction. See the paragraph https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#Custom-pressure-profiles on how to make these kind of custom modifications. |
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CIBSE
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CP1 Heat networks: Code of Practice for the UK (2020)
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The CIBSE CP1 (2020) guide is widely used and recognized in the UK for sizing heat network pipework.
At this moment, the Hysopt software only supports pipe sizing based on maximum velocity, maximum pressure drop per meter, or target pressure drop per meter. However, CIBSE CP1 recommends pipe sizing based on typical (or target) velocity which is currently not supported by the Hysopt software.As a workaround to size pipes according to the recommendations from .
The typical velocity table that can be found is CIBSE CP1 (2020) , we have created excel sheets to design pipes based on the max velocity method, providing very similar results as to the typical velocity calculation presented in the CIBSE CP1 (2020) guide.
We have two different pressure profile tables for CIBSE CP1 (2020). The first pressure table contains the ‘typical velocity’ that is listed in the CIBSE CP1 (2020). However, in CIBSE CP1 (2020) they have made a comment that higher velocities are allowed. For this reason, we have made a second pressure profile which allows 30% more flow velocity compared to the typical velocities in CIBSE CP1 (2020) for the external steel pipe. This pressure profile table can also be found below. The excels are thoroughly tested and can be implemented in our software as per the method explained above.
You can upload these pressure profiles as described in https://hysopt.atlassian.net/wiki/spaces/HRM/pages/3089367328/Select+pipes#Custom-pressure-profiles
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is also commonly applied for pipe sizing inside buildings. Therefore, the typical velocity table is used for the pipes that are defined as ‘normal pipes’. Here, the typical velocities are used as a maximum velocity constraint to select the right pipe size.
For the ‘heat network pipes’, a similar table is used but the typical velocities are increased with 30% to obtain a maximum velocity to select pipes for heat network purposes.
Both tables are made available below.
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It’s important to know that the CIBSE CP1 profiles are only applicable for following two pipe types :
If you use other pipe types, like the default steel pipe (welded), then the selection is done according to the Belgian WTCB / Buildwise (Belgium) standard. So make sure to change the pipe types in order to apply the CIBSE CP1 method |
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for ‘heat network pipes’ are also used when ISSO and WTCB pipe selection mode is applied. The two ‘heat network pipes’ are (see image below):
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Pressure profile CIBSE CP1 (2020)
A. Table with typical velocities from CIBSE CP1 (2020) → used for ‘normal pipes’
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B. Table with 30% higher allowed maximum velocities for pipetype “external steel pipe”→ used for ‘heat network pipes’
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