LPG

Technical Details

5.500

FLEXWELL®-LPG Pipe Systems for Petrol Station

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Verlegeanleitung

Safety Requirements

This Installation Guide should be read in full prior to syste

m

specification and installation. Installations should only be

carried out in accordance with the statutory requirements an

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LPG codes of practice of the country of installation and all

Health and Safety guidelines must be followed.

FLEXWELL®-LPG is suitable for LPG (Autogas) buried installa-

tions on Propane and Butane in both vapour and liquid phase.

Requirements for the installe

r

The installer

•

is quali

fied for installation and testing of LPG an

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liquid fuel equipment

•

follows Codes of Practice for the country in questio

n

•

has completed installation training by BRUGG or it

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Authorised Partne

r

•

carries out the installation as per current BRUG

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Installation Instruction

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Pipe trench

FLEXWELL®-LPG Piping needs a top covering of at least

60 cm above the pipe crown when laid into trenches no

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subject to traffic loading. Under traffic loading, cover of at least

75 cm is necessary. Allow a minimum of 10 cm trench depth o

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top of this for the sand bedding under the pipe. When diggin

g

the trench, carefully remove all sharp-edged stones or frag-

ments of masonry, piping etc

.

The floor of the trench must then be tamped flat and level.

Cover this

flat surface with a layer of at least 10 cm of closel

y

packed sand. This should have a grain size of < 2 mm and be

free of sharp-edged foreign objects. The sand bedding must

be in place before the pipe is drawn in. If several parallel pipes

are being laid, calculate at least 10 cm lateral distance be

-

tween pipes and trench wall. FLEXWELL®-LPG Piping must be

covered by a layer of sand at least 10 cm thick above the pip

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crown when filling in the trench. The top filling can then be

added. A yellow plastic indicator tape, or equivalent should b

e

laid between 200 mm and 300 mm above the pipe

.

Fixed anchor point

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Stresses occur during operation and during pressure testin

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of FLEXWELL®-LPG Piping due to linear expansion at the con-

nections. Additional stress is placed on the connection joint by

earth-compacting work and the weight of heavy component

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of the assembly added later (

flanges, valves etc.). These stress

forces must be compensated by a simple fixed point anchor.

The

fixed point is installed for this purpose before the piping is

laid.

Take care that the anchor is of su

fficient dimensions and is

firmly secured in place

.

After laying the piping, the FLEXWELL®-LPG connections ar

e

securely fixed in place in the mountings of the anchor point by

means of stable pipe clamps (see figure).

If it is not possible to attach the piping to an anchor point at

the time of laying the FLEXWELL®-LPG Piping then care mus

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be taken that excessive loading is not applied to the pipe end

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i.e. pressure testing above 6 bar gauge must not be carried

out and valves /

fittings must not be affixed to the pipework.

When carrying out the

first pressure test, please observe

clause Pressure Testing

.

m

i

n

.

6

0

c

m

h

S

h

S

Thickness of the sand bedding hS = 10 – 15 cm

,

grain size < 2 mm

19.03.2026 Subject to technical changes. Page 11