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15Original Instructions
1.7 Pipe system
1.7.1 Location of pipelines/general instructions
- The pump station and outlet points should be placed so that the lines become as short as
possible.
- The line should be arranged with as few bends as possible.
- Sometimes it may pay to split the line close to the pump station so the lengths conducting
large volumes of water become as short as possible. A centre location of the pump station
in relation to the outlet points would also lead to smaller pipe dimensions.
- Pipe lines should be placed on walls of tile or concrete, otherwise great care should be taken
(reinforcement plates etc.)
- Pipe lines should be placed so that damage is prevented (collision, frost, extreme attacks of
corrosion, etc.)
- Pipe lines should be fitted in a visual location everywhere or so that they may easily be
inspected. Lines should not be incorporated in walls or floors. When leading through walls
be careful not to enclosed. (Special lead-in bushes are available)
- The outlet points should be placed as close to the operation point as possible and so that a
hose length preferably of 20 m is used.
1.7.2 Types of pipes - standards
Seamless pipes of precision steel are used for the pipe system according to DIN 2391/C of St.
35.4 material quality, normalized, bright annealed and electro galvanized or welded steel pipes,
stainless, calibrated and glowed according to DIN 2463 - 1.401 d3-- (DIN 17457 cl. 1).
Alternatively, seamless pipes of precision steel in dimensions according to DIN 2391 and stainless
material quality e.g. Werkstoff no. 1.4301, 1.4436 or 1.4571. Comparable qualities to Swedish
standards are SIS 2333 or SIS 2343.
Pipe dimensions:
The following sizes are used with electro galvanized precision steel pipes:
- 15x2
- 22x2.5
- 30x4
The following sizes are used with stainless precision steel pipes:
- 15x1.5
- 22x2
- 30x3
In connection with branches close to the pump station it should be possible to avoid the 30
dimension for most 44C3 systems. For 160 bar systems fittings with a permissible working pres-
sure of min. ND 160 bar are to be used.
Please note that the pipe dimension 30 according to DIN 2353 is used together with a stronger
type of fitting (S-series) and pipe systems with this dimension therefore become more expensive
than e.g. an 22 line - particularly in multi-pump systems.
15


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