SGB DLR-G Operator's manual

Documentation
Pressure Leak Detector DLR-G
Read instructions prior to commencing any work
As of: 10/2018
Item no.: 604 102

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Table of Contents
1. General............................................................................................4
1.1 Information
1.2 Explanation of Symbols
1.3 Limitation of Liability
1.4 Copyright
1.5 Warranty Conditions
1.6 Customer Service
2. Safety...............................................................................................6
2.1 Intended Use
2.2 Obligation of the Operating Company
2.3 Qualification
2.4 Personal Protective Equipment
2.5 Fundamental Hazards
3. Technical Data...............................................................................9
3.1 General Data
3.2 Electrical Data
3.3 Switching Values
3.4 Field of Application
4. Design and Function....................................................................14
4.1 System Design
4.2 Normal Operating Condition
4.3 Function in Case of Leaks
4.4 Overpressure Valve
4.5 Displays and Controls
5. Mounting the System...................................................................19
5.1 Basic Instructions
5.2 Leak Detector
5.3 Selection of the Pressure Gas Bottle
5.4 Setting up the Pressure Gas Bottle and Mounting
the Pressure Reducer
5.5 Pneumatic Connection Lines, Requirements
5.6 Completing Pneumatic Connections
5.7 Electrical Cables
5.8 Electrical Wiring Diagram
5.9 Installation Examples
6. Commissioning.............................................................................27
6.1 Commissioning the Pressure Gas Bottle
6.2 Commissioning the Leak Detector
6.3 Changing the Operating Mode
7. Functional Check and Maintenance ........................................29
7.1 General
7.2 Maintenance
7.3 Functional Check
8. Malfunction (Alarm)......................................................................33
8.1 Alarm Description
8.2 How to Behave
9. Spare Parts.....................................................................................34
Table of Contents

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10. Accessories ...................................................................................35
11. Disassembly and Disposal.........................................................37
11.1 Disassembly
11.2 Disposal
12. Appendix.........................................................................................38
12.1 Evaluation of Tightness Inquiry
12.2 Personal Protective Equipment
12.3 Dimensions and Drilling Pattern, Plastic Housing
12.4 Dimensions and Drilling Pattern, Stainless Steel Housing
12.5 Declaration of Conformity
12.6 Declaration of Performance
12.7 Certification TÜV Nord
Table of Contents

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1. General
1.1 Information
These instructions provide important notes on using the leak detector
DLR-G. Complying with all safety instructions and guidelines is a pre-
requisite for safe working.
Furthermore, any local regulations for prevention of accidents appli-
cable at the site of use of the leak detector and general safety instruc-
tions must be complied with.
1.2 Explanation of Symbols
In these instructions, warnings are marked with the adjacent symbol.
The signal word expresses the level of hazard.
DANGER:
Imminently hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING:
Potentially hazardous situation which, if not avoided, could result in
death or serious injury.
CAUTION:
Potentially hazardous situation which, if not avoided, could result in
minor or moderate injury.
INFORMATION:
Highlights useful tips, recommendations and information.
1.3 Limitation of Liability
All information and instructions in this documentation have been
compiled considering the applicable norms and regulations, the state
of the art and our longstanding experience.
SGB does not assume any liability in case of:
Noncompliance with these instructions
Unintended use
Use of unqualified personnel
Unauthorized modifications
Connection to systems not approved by SGB
1.4 Copyright
The contents, texts, drawings, images and other representations are
copyrighted and subject to industrial property rights. Any misuse is
punishable.
General



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1.5 Warranty Conditions
We provide warranty for the leak detector DLR-G for a period of 24
months from the day of installation on site in accordance with the
General Terms & Conditions.
The maximum warranty period is 27 months from our date of sale.
Warranty is subject to submission of the functional/test report on ini-
tial commissioning by qualified personnel.
Stating the serial number of the leak detector is required.
The obligation of warranty shall cease to exist in case of
- inadequate or improper installation
- unintended use
- modifications or repair works carried out without the manufacturer's
consent.
1.6 Customer Service
Our customer service is available for any inquiries.
For information on contacts please refer to our website www.sgb.de
or the label of the leak detector.
General

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2. Safety
2.1 Intended Use
Operating mode "I" (I = "interval", i.e. gas pressure bottle is con-
nected for commissioning and functional check): For double-walled
pipes/fittings installed underground or indoors only.
Operating mode "C" (C = "continuous", i.e. gas pressure bottle is
continuously connected to the leak detector): For double-walled
pipes/fittings installed above or underground.
The leak detector alarm pressure must be at least 1 bar higher
than the maximum feed pressure in the product-transporting pipe.
Grounding in accordance with valid regulations
1
.
Tightness of the leak detection system according to section 7.3.4.
Leak detector installed outside of the explosive area.
Lead-throughs for connection lines into and out of the manhole
chamber must be sealed gas-tight.
Leak detector (electric) cannot be turned off.
Use of air pressure as the leak detection medium:
oAir pressure can always be used for conveyed media with a
flash point > 60°C (for Germany > 55°C acc. to TRGS 509 and
751).
oFor conveyed media with a flash point ≤ 60°C (for Germany
≤ 55°C acc. to TRGS 509 and 751), only if their explosive va-
por-air mixtures can be assigned to temperature code T1 to T3
and gas group II A or II B and if they have an inner wall that is
not permeable for media that can lead to the development of
explosive vapor-air mixtures.
oFor conveyed media with a flash point ≤60°C (for Germany
≤ 55°C acc. to TRGS 509 and 751), it must also be noted that in
case of a leak in the inner pipe, air is pressed into the conveyed
product. This must be considered when evaluating explosion
protection of pumps/fittings.
Section 3.4.5 must be complied with.
Any claims arising from misuse are excluded.
2.2 Obligation of the Operating Company
The leak detector DLR-G is used in a commercial environment. The
operating company is therefore subject to statutory occupational safe-
ty obligations.
In addition to the safety instructions in this documentation, all appli-
cable safety, accident prevention and environmental regulations must
be adhered to. In particular:
- Compiling a risk assessment and implementing its results in a di-
rective
1
For Germany: e.g. EN 1127
Safety
WARNING!
Danger from
misuse
WARNING!
Danger in case
of incomplete
documentation

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- Performing regular checks as to whether the directive is in com-
pliance with the current standards
- The directive includes, among others, how to react to an alarm
that might arise
- Arranging for an annual functional check
2.3 Qualification
The personnel must be capable of independently recognizing and
avoiding potential risks based on their qualifications.
Companies commissioning leak detectors should have completed re-
spective training with SGB, through SGB or its authorized representa-
tive.
National guidelines must be adhered to.
For Germany:
Technical service qualification for installation, commissioning and
maintenance of leak detection systems.
2.4 Personal Protective Equipment
Personal protective equipment must be worn during work.
- Wear necessary protective equipment for the relevant work
- Note and comply with existing PPE signs
Entry in the "Safety Book"
Wear HV vest
Wear safety footwear
Wear hard hat
Wear gloves –where necessary
Wear safety goggles –where necessary
WARNING!
Danger to humans
and the environ-
ment in case of
inadequate qualifi-
cation
Safety

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2.5 Fundamental Hazards
DANGER
From electric current
When working on the leak detector, it must be disconnected from the
power supply unless stated otherwise in the documentation.
Comply with relevant regulations regarding electric installation,
explosion protection (e.g. EN 60 079-17), if necessary, and accident
prevention.
DANGER
From explosive vapor-air mixtures
Ensure there is no gas present prior to performing work
Comply with explosion regulations, e.g. BetrSichV (and/or directive
1999/92/EC and the laws of the respective member states resulting
therefrom) and/or others.
DANGER
From working in shafts
The leak detectors are mounted outside the manhole chambers.
Pneumatic connection is usually performed inside the manhole
chamber. Therefore, the chamber must be entered for mounting.
Before entering, the corresponding protective measures must be tak-
en and it must be ensured that no gas and sufficient oxygen are pre-
sent.
Safety

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3. Technical Data of the Leak Detector
3.1 General Data
Dimensions and drilling pattern: see sections 12.3 and 12.4
Weight: 2.1 kg (plastic housing)
6.3 kg (stainless steel housing)
Storage temperature range: -40°C to +70°C
Operating temperature range: 0°C to +50°C (plastic housing)
-40°C to +60°C (stainless steel
housing)
Housing protection class: IP 30 (plastic housing)
IP 54 (stainless steel housing)
3.2 Electrical Data
Power supply 100 … 240 V AC
optional: 24 V DC
Power input: 10 W (without heating)
28 W (incl. heating at 20°C)
Terminals 5, 6 (external signal): max. 24 V DC; max. 300 mA*
Terminals 11…13 (voltage-free): DC ≤ 25 W or AC ≤ 50 VA
Terminals 17…19 (voltage-free): DC ≤ 25 W or AC ≤ 50 VA
Fuse protection: max. 10 A
Overvoltage category: 2
* With Ethernet board max. 150 mA
Technical Data

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3.3 Switching Values If possible, leak detectors that are operated with operating mode I
should be operated without overpressure valves.
Pressure levels 1 to 9
Type
DLR-G
pB
[bar]
pAE
[bar]
pPA
[bar]
Position of the DIP
switch
PÜDV1 2
[bar]
pÜDV2 3
[bar]
pPRÜF
[bar]
pDM
[bar]
1
Unpres-
surized
> 1
< 2
4
2.8 0.15
6.5 0.2
> 3.4
2.5
2
< 1
> 2
< 3
3.8 0.2
7.5 0.2
> 4.5
3.5
3
< 2
> 3
< 4
4.8 0.2
8.5 0.2
> 5.6
4.5
4
< 3
> 4
< 5
5.8 0.2
9.5 0.2
> 6.7
5.5
5
< 4
> 5
< 6
6.8 0.2
10.5 0.2
> 7.8
6.5
6
< 5
> 6
< 7
7.8 0.2
11.5 0.2
> 8.9
7.5
7
< 6
> 7
< 8
8.8 0.2
12.5 0.2
> 10
8.5
8
< 7
> 8
< 9
9.8 0.2
13.5 0.2
> 11.1
9.5
9
< 8
> 9
< 10
10.8 0.2
14.5 0.2
> 12.2
10.5

Special switching values
agreed to by SGB and custom-
ers
Special switching values agreed to by SGB
and customers
2
The overpressure valve ÜDV1 can be omitted if it can be assured that the pressure in the interstitial space will not ex-
ceed the test pressure (e.g. through warming) and that the set pressure on the pressure reducer is lower than the test
pressure of the interstitial space.
If overpressure valves ÜDV1 from higher pressure levels are used, sufficient pressure resistance of the interstitial space
must be guaranteed.
3
The overpressure valve ÜDV2 can be omitted if the test pressure of the interstitial space is higher than the operating
pressure of the overpressure valve integrated in the pressure reducer.
4
Switches 1 to 9 are designed to select the pressure level; switch 10 is designed to select the operating mode.

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Pressure levels 10 to 18
10
< 9
> 10
< 12
13.5 0.3
17 0.3
> 15.4
13
11
< 10
> 11
< 13
14.5 0.3
18 0.3
> 16.5
14
12
< 11
> 12
< 14
15.5 0.3
19 0.3
> 17.6
15
13
< 12
> 13
< 15
16.5 0.3
20 0.3
> 18.7
16
14
< 13
> 14
< 16
17.5 0.3
21 0.3
> 19.8
17
15
< 14
> 15
< 17
18.5 0.3
22 0.3
> 20.9
18
16
< 15
> 16
< 18
19.5 0.3
23 0.3
> 22
19
17
< 16
> 17
< 19
20.5 0.3
24 0.3
> 23.1
20
18
< 17
> 18
< 20
21.5 0.3
25 0.3
> 24.2
21

Special switching values
agreed to by SGB and custom-
ers
Special switching values agreed to by SGB
and customers
The following abbreviations are used in the table:
pBMaximum operating pressure in the inner pipe (feed pressure + dy-
namic pressure + pressure due to geodetic height differences)
pAE Switching value "Alarm ON"; the alarm will be triggered at this pres-
sure level at the latest
pPA Switching value "Refilling OFF" (= operating pressure)
pÜDV1 Operating pressure to activate overpressure valve 1 (interstitial
space)
pÜDV2 Operating pressure to activate overpressure valve 2 (supply)
pPRÜF Minimum test pressure of the interstitial space
pDM Set pressure on the pressure reducer
Further switching values:
pAA Switching value "Alarm OFF"; the alarm will be deactivated if this
value is exceeded
[pAA = pAE + ~250 mbar (pressure levels 1 to 9) and/or pAA = pAE +
~500 mbar (pressure levels 10 to18)]
pPE Switching value "Refilling ON" [pPE = pPA - ~250 mbar (pressure lev-
els 1 to 9) and/or pPE = pPA - ~500 mbar (pressure levels 10 to 18)]
Technical Data

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3.4 Field of Application
3.4.1 Interstitial space requirements
Proof of pressure resistance of the interstitial space (see section
3.3, column "pPRÜF" minimum test pressure of the interstitial
space)
Proof of suitability of the interstitial space (for Germany: proof of
usability from construction authority).
Sufficient passage in the interstitial space for the leak detection
medium (air/nitrogen)
Tightness of the interstitial space according to this documentation.
The number of interstitial spaces to be monitored depends on the
total interstitial space volume. According to EN 13160, 10 m3may
not be exceeded. To be able to test the tightness of the interstitial
space, it is recommended not to exceed 4 m3.
The pipeline length (per duct) to be monitored should not exceed
2500 m and must correspond with the specifications for the pipe
permit.
3.4.2 Pipes
Double-walled pipes made of metal or plastic, in factory or on-site
construction.
For Germany: Additional requirements may result from the respec-
tive permits.
Operating mode C for double-walled pipes installed above or un-
derground.
Operating mode I only for applications without temperature varia-
tions of more than 10°C (e.g. double-walled pipes installed un-
derground or indoors –no hot media).
3.4.3 Fittings
Double-walled fittings made of metal or plastic in factory or on-site
construction.
For Germany: with proof of usability from construction authority,
unless it is part of the pipe permit.
Operating mode C for double-walled pipes installed above or un-
derground.
Operating mode I only for applications without temperature varia-
tions of more than 10°C (e.g. double-walled pipes installed un-
derground or indoors –no hot media).
3.4.4 Conveyed product
Liquids hazardous to water, even with a flash point of ≤60°C (for
Germany ≤ 55°C acc. to TRGS 509 and TRGS 751). Restrictions
result, according to 3.4.5, from the material to be conveyed and
the leak detection medium used.
The conveyed product may not react with the leak detection medi-
um.
Technical Data

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3.4.5 Interaction between interstitial space, leak detection medium and operating mode
The following statements apply only to applications to transport
liquids with flash points ≤60°C (for Germany ≤ 55°C acc. to TRGS
509 and 751). They are based on a risk evaluation according to the
directive 94/9/EEC (explosion directive). The risk evaluation was per-
formed based on the table in section 3.3 (informative) for EN 13160.
If the evaluation of the device categories has different results due to
operational regulations or for any other reasons, the use of the leak
detector must be checked separately.
Walls of storage
medium
Overpressure valve
for interstitial space
Operat-
ing
mode
Suggested leak de-
tection medium or use
of the leak detector
prohibited
Permeable:
(e.g. interior wall
made of plastic)
Exists
C
Inert gas
I
Use prohibited
Does not exist
C
Inert gas
I
Use prohibited5
Not permeable:
(e.g. double-
walled steel pipe)
Exists
C
Inert gas/air pressure6
I
Inert gas
Does not exist
C
Inert gas/air pressure6
I
Inert gas
5
The leak detector with inert gas can only be used for this application if the operator assesses the interstitial space to be
a zone 2.
6
The use of air pressure does not present any problems with interstitial spaces for pipes/fittings with a medium-
transporting area that is not permanently filled with product (e.g. filling lines).
When air pressure is used for interstitial spaces of pipes/fittings with a medium-transporting area that is permanently
filled with product, it must be assured that the product-transporting equipment (e.g. pumps) is suitable for zone 0 be-
cause in the event of a leak, air will be pressed into the product-transporting system.
If the pressure supply is performed using a pressure gas bottle, it is necessary to equip the pressure gas bottle with
residual pressure monitoring. In case of a notification (drop below the set residual pressure) the pressure gas bottle is to
be refilled or replaced with a full one.
Technical Data

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4. Design and Function
4.1 Design
Interior view of plastic housing with:
01 Signal lamp "Alarm", red
09 Signal lamp "Operation", green
23 Signal lamp "Filling" or "Refilling", yellow
29 Button "Commissioning" (filling)
44 Solenoid valve
69 Buzzer
70-1 Overpressure valve (interstitial space)
70-2 Overpressure valve (supply)
71 "Mute" button
75 Display board
76 Main board
102 Pressure sensor
140 Contact for serial data transfer and programming
Design and Function
75
102
09
44
01
71
29
69
23
76
70-1
70-2
140

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Interior view of stainless steel housing, weather-protected, with:
44 Solenoid valve
69 Buzzer
70-1 Overpressure valve (interstitial space)
70-2 Overpressure valve (supply)
75 Display board
76 Main board
102 Pressure sensor
140 Contact for serial data transfer and programming
141 Keypad terminal strip
Design and Function
75
102
44
75
76
70-1
70-2
141
140
69

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The pressure leak detector DLR-G monitors both walls of the double-
walled system for leaks. The monitoring pressure during operation is
higher than any pressure on the inner or outer wall, so that leaks will
be indicated by a pressure drop.
Inert gas, air from a pressure gas bottle or from a pressure gas sys-
tem can be used as leak detection media. If air is used, it must be
dried to a relative humidity of less than 10%.
The current pressure is shown on the display in mbar/bar or PSI
7
:
Values of less than 150 mbar or less than 2.18 PSI will not be dis-
played.
Values of up to 990 mbar will be displayed in mbar and without
decimal.
Values from 1 bar are displayed in bar with two decimals and from
10 bar with one decimal.
Values in PSI are displayed with one or two decimals.
4.2 Normal Operating Condition
The normal operating condition is achieved during commissioning by
building up pressure to the operating pressure through the pressure
cylinder connected to the leak detector (operating mode C) or a mo-
bile pressure cylinder (operating mode I).
The existing pressure in the interstitial space is monitored with a
pressure sensor in the leak detector. Any minor leaks lead to a pres-
sure drop, which will be compensated in the operating mode C.
Depending on the grade of tightness of the entire unit, the overpres-
sure moves between the switching value Refilling OFF and the
switching value Refilling ON.
For operating mode I, the requirements for the tightness of the inter-
stitial space(s) and the connection line(s) must be set very high to as-
sure trouble-free operation for one year.
4.3 Function in Case of Leaks
If there is a leak in the inner or outer wall, gas will leak from the inter-
stitial space. The pressure drops.
When the switching value "Refilling ON" is reached in operating mode
C, refilling will be activated and the operating pressure will be built up
again. If the leakage ratio is greater than the limited refilling rate, the
pressure will continue to drop to alarm pressure.
An optical and audible alarm will be triggered when the alarm pres-
sure is reached, which will open the voltage-free contacts.
An additional relay can be used for operating mode I to establish volt-
age-free contacts when the pressure drops below the "Refilling RE-
QUIRED" pressure.
7
The change of the bar and PSI settings is performed at the factory. This change can also be performed on site following
coordination with the manufacturer.
Design and Function

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4.4 Overpressure Valve
If the interstitial space has sufficient pressure resistance (see section
3.3), an overpressure valve will not be supplied.
The overpressure valve 1 (interstitial space) must be used if a pres-
sure increase exceeding the test pressure (e.g. through warming) can
occur and/or the set pressure on the pressure reducer is higher than
the test pressure of the interstitial space.
The overpressure valve 2 (supply) must be used if the set pressure of
the overpressure valve integrated in the pressure reducer is higher
than the test pressure of the interstitial space.
4.5 Displays and Controls
4.5.1 Display
Signal
lamps
Operating Condition
Refilling acti- vated or re- quired
Filling activated
Alarm condi- tion
Alarm, audible alarm acknowledged
Device mal- function
OPERA-
TION:
green
ON
ON
ON
ON
ON
ON
ALARM:
red
OFF
OFF
ON8
ON
BLINK-
ING
ON
REFILL-
ING: yellow
OFF
ON
BLINK-
ING
ON
ON
OFF
4.5.2 Function "Turn off audible alarm signal"
Shortly press "mute" button once, audible signal turns off, the red
LED blinks.
Pressing the button again will turn the audible signal on.
This function is not available during normal operating conditions and
malfunctions.
8
The "Alarm" signal lamp can have various displays depending on the pressure in the interstitial space and whether or
not the "Audible alarm signal" button has been pressed.
Design and Function

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4.5.3 Function "Filling" Press and hold the "Filling" button for about 5 seconds until the yellow
LED is blinking. The filling process has been activated.
When the operating pressure has been reached, the yellow signal
lamp will go out and the filling process is turned off.
In case of a pressure drop due to pressure compensation processes,
the filling process can be reactivated to fill the interstitial space com-
pletely.
Holding this button down for more than 10 seconds will trigger the
alarm. The triggered alarm will go off shortly after letting go of the but-
ton.
4.5.4 Function "Testing the optical and audible alarm signal"
Press and hold the "mute" button (about 10 seconds). The alarm will
be triggered until the button is released.
This inquiry is only possible if the pressure in the system has exceed-
ed the "Alarm OFF" pressure.
4.5.5 Function "Tightness inquiry"
Press and hold the "mute" button until the signal lamp is blinking rap-
idly, then release it. The display (103) will show a tightness value and
the same value will be indicated by the "Alarm" signal lamp flashing.
10 seconds after displaying this value, the leak detector will return to
normal operation.
This inquiry can only be performed in operating mode "C". The leak
detector must have performed at least 1 automatic refilling interval in
normal operating conditions (i.e. without manual activation of the fill-
ing function) to achieve a valid statement.
For evaluation of the value displayed see Appendix 11.1.
(103)
Design and Function
(103)

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5. Mounting the System
5.1 Basic Instructions
Prior to commencing work, the documentation must be read and
understood. In case of ambiguities, please refer to the manufac-
turer.
The safety instructions in this documentation must be adhered to.
Only qualified service companies may be used for installation.
Comply with relevant regulations for prevention of accidents.
Lead-throughs for pneumatic and electric connection lines,
through which the explosion atmosphere can carry over, must be
sealed gas-tight.
Comply with explosion regulations (if required), e.g. BetrSichV
(and/or directive 1999/92/EC and the laws of the respective
member states resulting therefrom) and/or others.
Compliance with the relevant traffic regulations is required when
transporting pressure gas bottles to and from the construction
site.
The pressure gas bottle must be protected from falling over at the
construction site.
If nitrogen is used, sufficient ventilation must be provided if com-
missioning/operation is performed in enclosed spaces. Attach in-
formation sign.
Provide a test valve at the end facing away from the leak detector
at the end of the pipe(s)/fitting(s).
Before entering inspection chambers, the oxygen content must be
tested and the inspection chamber flushed if necessary.
If metallic connection lines are used, it must be ensured that the
power supply grounding is on the same potential as the pipe to be
monitored.
Some notes on personal protective equipment are provided in
Appendix 12.2.
5.2 Leak Detector
(1) Generally mounted on walls with plugs and screws.
(2) In a dry room, or outdoors in a suitable housing.
(3) If mounted in a protective box: additional external signal or alarm
forwarding via voltage-free contacts to a switchboard or similar
device.
(4) NOT in potentially explosive areas.
(5) Dimensions of housings and drilling patterns are illustrated in
Appendix 12.3 and 12.4, respectively.
Mounting

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5.3 Selecting the Pressure Gas Bottle and the Pressure Reducer
(1) A pressure cylinder containing either 10 liters or 50 liters can be
used up to a interstitial space volume of 5 m3.
(2) For more than 5 m3, a pressure cylinder containing 50 liters must
be used.
(3) The pressure reducer must have an integrated overpressure
valve.
(4) The range of settings for the pressure reducer to be used must
be selected in correspondence with the application or the pres-
sure to be set. (see section 3.3).
5.4 Setting up the Pressure Gas Bottle and Mounting the Pressure Reducer
(1) Set up and secure pressure gas bottle, e.g. using a bracket and
safety chain intended for this purpose.
(2) Close safety chain.
(3) Remove protective cover and mount pressure reducer to bottle.
(4) Close shut-off valve on the pressure reducer.
5.5 Pneumatic Connection Lines, Requirements
Pressure resistance of the metal (generally Cu) or plastic pipes
must at least correspond with the test pressure in the interstitial
space. Also applies to fittings and screwed connections. Note
temperature range, especially when using plastic.
Inside clearance
at least 4 mm with inert gas as leak detection medium
at least 6 mm with air as leak detection medium
50 m should not be significantly exceeded, but if this happens: In-
stall pipe with greater inside clearance using transition pieces.
The full cross section must be maintained. Do not push in or
bend
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.
Install metal or plastic pipes underground or plastic pipes above-
ground outdoors in protective pipes.
Seal the protective pipe gas-tight and protect from moisture.
Avoid build-up of electrostatic charges (e.g. during pulling of lines).
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If necessary, install commercial fittings for plastic pipes (specified bending radii).
Mounting