KE 154
March 2012
GASTEC QA
Approval Requirements 154
for the GASTEC QA product certificate for
insulation union couplings in gas conduits up to
50 mm nominal diameter
Foreword
These GASTEC QA Approval requirements have been accepted by the Board of Experts of the GASTEC QA Quality
Mark, wherein all the relevant parties in the field of gas related products are represented. This Board of Experts also
supervises the certification activities and where necessary require the GASTEC QA Approval Requirements to be
revised. All references to Board of Experts in these GASTEC QA Approval requirements pertain to the above
mentioned Board of Experts.
These GASTEC QA Approval requirements will be used by Kiwa Nederland B.V. in conjunction with the “Kiwa
regulations for carrying the GASTEC QA Quality mark”. This regulation details the method employed by Kiwa
Nederland B.V. for conducting the necessary investigations prior to issuing the (technical approval-with) product
certificate and the method of external control. The inspection frequency is determined by the above mentioned Board
of Experts.
th
Approved by Board of Experts
: February 15
2012
Accepted by Kiwa Nederland B.V.
: March 15 2012
th
Kiwa Nederland B.V.
Wilmersdorf 50
7327 AC Apeldoorn
Postbus 137
7300 AC Apeldoorn
The Netherlands
Tel. +31 55 539 33 93
Fax +31 55 539 34 94
www.kiwa.nl
© 2012 Kiwa Nederland B.V.
All rights reserved. No part of this book may be reproduced, stored in a database or retrieval system, or
published, in any form or in any way, electronically, mechanically, by print, photoprint, microfilm or any
other means without prior written permission from the publisher.
The use of this evaluation guideline by third parties, for any purpose whatsoever, is only allowed after a written
agreement is made with Kiwa to this end.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
Contents
1
Introduction
7
1.1
General
7
1.2
Scope
7
1.3
Acceptance of test reports provided by the supplier
7
1.4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
1.4.7
1.4.8
Definitions
Bending moment
Compressive force
Creepage distance
Clearance distance
Maximum pressure
Test voltage
Torsional moment
Tensile force
7
7
7
7
7
8
8
8
8
2
Product Requirements
9
2.1
Introduction
9
2.2 General
2.2.1 Error-free installation
2.2.2 Durability
9
9
9
2.3
2.3.1
2.3.2
2.3.3
2.3.4
9
9
9
9
9
Materials
Fit for use
Resistance to gas
Rubber quality
Metals
2.4 Construction
2.4.1 Resistance to loads
2.4.2 Diameter
9
9
10
2.5
2.5.1
2.5.2
2.5.3
Threaded connections
Use in metal components
Insulation
Dimensions
10
10
10
10
2.6
Leak tightness
10
2.7 Design of the insulation components
2.7.1 Clearance and creepage distances
2.7.2 Dirt protected clearance and creepage distances
10
10
11
2.8 Effectiveness of the insulation
2.8.1 Resistance to 500 V DC
2.8.2 Resistance to 2500 V AC
11
11
11
2.9
11
Resistance against effect of elevated temperature
11
2.10 Marking and documentation
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
2.10.1 Marking on union couplings
2.10.2 Instructions
11
11
3
Testing methods
12
3.1
Sequence
12
3.2 Components of the insulation union coupling
3.2.1 Visual inspection
12
12
3.3
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
Testing the insulation and leak tightness when applying mechanical loads
Test pressure
Leak tightness test methode
Leak tightness when tightened with specified torque
Leak tightness after exposure to loads
Insulation and leak tightness during and after bending
12
12
12
12
12
12
3.4
Effectiveness of the insulation at high humidity
13
3.5
Resistance to high temperature
13
3.6
Resistance to liquid pentane
13
4
Quality system requirements
14
4.1
General
14
4.2
Manager of the quality system
14
4.3
Internal quality control/quality plan
14
4.4
Procedures and work instructions
14
4.5
Other Quality system requirements
14
5
Summary of tests and inspections
15
5.1
Test matrix insulation union couplings in gas conduits up to 50 mm nominal diameter
15
5.2
Evaluation of the quality system
16
5.3
Frequency of external audits
16
6
Agreements on the performance of certification
17
6.1
General
17
6.2
Certification staff
17
6.3
Qualification requirements for executive staff of CI that fulfil the requirements of EN 45011
17
6.4
Qualification requirements for executive staff of a CI that are in addition set up by the Board of Experts
for the subject of this evaluation guideline
17
6.5
Qualification
18
7
List of mentioned documents
19
7.1
Standards/ normative documents
19
7.2
Replacement(s) of standard/ normative documents
19
Appendix A: Model IQC-scheme or frame-IQC-scheme
Appendix B: Model Certificate
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
Summary of changes
Paragraph
1.1
1.2
1.3
0
2
2.1
2.3
2.4.1
2.5.1
2.5.3
2.6
2.10.1
2.10.2
3
3.2.1
3.3.2
3.3.3
3.3.4
3.3.5
3.6
4
0
Change
A general introduction is included, replacing the 1976 foreword.
The definition in former chapter 1 has been included in par. 1.2 “Scope”. The term
„isolation piece‟ has been replaced by „isolation union coupling‟. Because an isolation
union coupling always has threaded connections, the term „with threaded connections‟
has been omitted. The term „not to be installed in the ground‟ has been replaced by „to
be installed inside buildings‟. Differences between Approval Requirements 154 and 61
are explained.
New added: the appropriate gas families.
A clause regarding the acceptance of test reports provided by the supplier is included
Ch.3 has become par. 0
Ch.4 has become ch. 2. Paragraphs have been regrouped and numbering of
paragraphs has been changed likewise.
New added: an introduction to product requirements.
(formerly 4.2) Added to material requirements: paragraph 2.3.3 with rubber quality;
paragraph 2.3.4 with metals.
0
0
(formerly 4.3.1) The unclear meaning of „CA 20 C‟ has been replaced by „minus 5 C‟
0
in the second last column, and by ‟23 C‟ in the last column. Tolerances in the
temperatures have been added as well.
(formerly 4.4.1) Added: “The purpose of the threaded connections should not be to
create a leak tight sealing.”
NEN 3258 and NEN 176 have been replaced by respectively EN 10226-1 and NEN-ENISO 228-1.
New: paragraph with requirements for the dimensions of the threaded connections.
0
(formerly 4.5.1) The requirements for gas tightness „-20 C to +50 C‟ has been
0
0
replaced by „-5 C (minus 5 C) to +50 C‟
(formerly 4.1.3) Added: Marking should also include the Gastec QA word mark or logo.
(formerly 4.1.4) The sentence “not to be installed in the ground” has been replaced by
“to be installed inside buildings.”
Added: “The manufacturer shall also supply assembly instructions in Dutch.” And “The
installation instructions prescribe the torque to tighten the insulation union coupling.”
Removed: former par.4.8.2 which stated: “The layer thickness of clamped rubber shall
be greater than or equal to the layer thickness of the plastic that is encased.”
Ch.5 has become ch.3. Numbering of paragraphs has been changed likewise. No
substantive changes except par. 3.3.5
(formerly 5.2.1): Added a comment to check the dimensions of the threaded
connections.
Added: a paragraph on the leak tightness test method.
Added: a paragraph on testing when the union coupling is tightened with a specified
high torque.
Added: the force with which the union coupling should be tightened during the other
tests.
(formerly 5.3.2): The leak tightness tests have been changed at the following points:
1) Measuring the leakage is not done anymore during the exposure with loads, but
afterwards.
2) The leak tightness tests will be performed at three different temperatures.
3) The method of leak tightness testing is no longer prescribed (e.g. in water or with
leak spray), but the amount of leakage is prescribed.
4) Temperatures have been changed, according to changes in previous paragraphs.
5) Former test a (no load applied): has been omitted. Numbering of tests has been
adapted accordingly.
6) Test c (formerly test d): the tensile force of 1 kN has been omitted.
(formerly 5.3.2): Type error in formula for Mb had been corrected.
Last sentences have been changed in order to make clearer when the load shall be
applied and taken away.
Added: the testing temperatures.
(formerly 5.51) Removed: Rubber should be tested to liquid pentane. Instead par. 2.3.3
with rubber quality has been added.
The testing method is explained more clearly.
New chapter „quality system requirements‟ included
Summary of tests and inspections included
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
Paragraph
6
7
Appendix
A
Appendix
B
Change
Agreements on the performance of certification included
List of referenced documents included
Model of IQC-scheme included
Model Certificate included
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
1 Introduction
1.1 General
These GASTEC QA Approval requirements replace the GASTEC QA Approval requirements 154, for the GASTEC
QA product certificate for loose insulation pieces in gas conduits up to 50 mm nominal diameter, dated May 1976.
Note: the title of the Approval Requirements has been changed slightly. The term „loose insulation pieces‟ has been
replaced by „insulation union coupling‟ in order to specify better the scope of the Approval Requirements.
During the execution of the certification work, Kiwa Nederland B.V. is bound to the “Kiwa regulations for carrying the
Gastec QA quality mark”.
1.2 Scope
An insulation union coupling is understood to mean a part of a gas conduit for the distribution of natural gas and LPG
in gaseous phase, with which a removable pipe connection is created that is not electrically conductive.
These criteria apply to insulation union couplings that are installed inside buildings, after the main shutoff valve. The
insulation union couplings have a maximum nominal diameter of 50 mm. The insulation union couplings can be
supplied as a loose unit or in combination with devices, and are used in gas conduits that are suitable for gas
pressure up to 1 bar.
The difference in scope between these Approval Requirement and Gastec QA Approval Requirements 61, for the
GASTEC QA product certificate for loose insulation pieces in gas conduits up to 50 mm nominal diameter, is as
follows:
 Approval requirements 61 deal with pieces consisting of one part, non-removable, while Approval requirements
154 deal with union couplings consisting of two removable parts.
 Approval requirements 61 deal with insulation pieces applicable both before and after the main shutoff valve,
while Approval requirements 154 deal with union couplings applicable only after the main shutoff valve.
The union couplings are for use in gas installations for 2
petroleum gas- LPG) according to NEN-EN 437.
nd
rd
family gases (natural gas) and 3 family gases (liquefied
The specific functional recommendations for application of insulation pieces, like these union couplings, in gas
systems are described in NEN 7244 and national and international standards and/or regulations.
1.3 Acceptance of test reports provided by the supplier
The rules for acceptance of test reports provided by the supplier are laid down in the Regulations for Product
Certification for carrying the GASTEC QA quality mark.
1.4 Definitions
1.4.1 Bending moment
The bending moment is the moment with which the insulation union coupling is loaded to cause bending, taking into
account the set conditions.
1.4.2 Compressive force
The compressive force is the force with which the insulation piece is axially loaded during testing.
1.4.3 Creepage distance
The creepage distance is, with regard to the surface of the insulation part, the shortest distance between the
electrically conductive parts of the insulation union coupling.
1.4.4 Clearance distance
The clearance distance is the shortest straight unimpeded distance measured between the electrically conductive
components of the insulation union coupling.
Gastec QA Approval requirements
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KE 154
March 2012
1.4.5 Maximum pressure
The maximum pressure is the air pressure at which the insulation union coupling is tested.
1.4.6 Test voltage
The AC voltage set for the test is the effective value of this AC voltage that is applied during the test period.
1.4.7 Torsional moment
The torsional moment is the moment with which the insulation union coupling is loaded for torsion, taking into
account set conditions.
1.4.8 Tensile force
The tensile force is the force with which the insulation union coupling is axially loaded with tension during the test.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
2 Product Requirements
2.1 Introduction
In this chapter the performance requirements imposed on insulation union couplings in gas conduits up to 50 mm
nd
rd
nominal diameter in contact with 2 and 3 family gases are included, as well as the determination methods in order
to be able to determine whether the requirements are fulfilled.
2.2 General
2.2.1 Error-free installation
The insulation union coupling shall be made in such a way that errors during installation that jeopardize the function
of the insulation union coupling are not possible.
2.2.2 Durability
The insulation union coupling shall be made in such a way that that the proper functioning and durability are ensured
under normal use.
2.3 Materials
2.3.1 Fit for use
The quality and thickness of the materials used shall be such that they can withstand the mechanical, chemical and
thermal forces.
2.3.2 Resistance to gas
Components of the insulation union coupling that come into contact with the gas flowing through shall be resistant
against the action of the gas.
2.3.3 Rubber quality
0
Rubber components in the couplings shall comply with NEN-EN 682, type GAL (for Gaseous fuel, -15 to 50 C) and
0
0
type GBL (Hydrocarbon fluids and gaseous fuel, -15 to 50 C), or to NEN-EN 549 Class A2 (-20 to 60 C).
2.3.4 Metals
Metal pieces shall be made from brass as specified in European product requirements for copper alloys or registered
2
by CEN/TC 133 or from steel with a minimum tensile strength of 350 N/mm , provided that the union couplings
manufactured from them meet the functional requirements of these Approval Requirements.
2.4 Construction
2.4.1 Resistance to loads
The construction shall be such that all the components of the insulation union coupling are resistant against the loads
as listed in table 1.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
Table 1: Resistance to loads
nominal diameter
in mm
tensile force
compressive
force in N
torsional moment in Nm
bending moment
in Nm
at 50 ± 3 C
at -5 ± 3 C
at 23 ± 3C
10
1000
60
120
68
15
1300
80
160
125
20
1700
100
200
200
25
2500
120
240
400
32
4100
150
300
700
40
6400
180
360
925
50
9900
240
480
1700
0
If angular deviation of 45 between the two halves of the insulation union coupling is reached before reaching the
0
torsional moment according to table 1, the torsional moment that caused this 45 angular deviation will suffice.
2.4.2 Diameter
The diameter of the opening of the insulation union coupling shall at no point be smaller than 0.75 x the greatest
nominal diameter.
2.5 Threaded connections
2.5.1 Use in metal components
The threaded connections shall only be installed in metal components.
2.5.2 Insulation
The threaded connections shall be made in such a way that no electrical contact of the insulated components can be
made after installation.
2.5.3 Dimensions
The dimensions of the threaded connections of the coupling nut and the coupling bolt shall be compatible with
NEN 2542 or shall conform to the Dutch Code of practice NPR 7028:2008.
In case the insulation union coupling is a loose part with a gas-tight screw-thread connection at the other end as well,
the gas-tight screw-thread connection shall be made according to NEN-EN 10226-1.
When a screw-thread connection is applied, the inlet and/or outlet concerned shall be provided with points where
mounting tools can be made to engage.
2.6 Leak tightness
The insulation union coupling shall be externally gas tight at temperatures of -5 C , 23 C and to +50 C.
At these temperatures the union couplings shall be gas tight when the union coupling is fastened with a torque of
6 Nm per mm of the nominal diameter, and when the union coupling is fastened according to the instructions of the
manufacturer.
0
2.7 Design of the insulation components
2.7.1 Clearance and creepage distances
The insulation components shall be designed in such a way that the clearance and creepage distances are at least 3
mm.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
2.7.2 Dirt protected clearance and creepage distances
Unlike is stated in paragraph 2.7.1, clearance and creepage distances that are protected against dirt deposits shall
be at least 2 mm.
2.8 Effectiveness of the insulation
2.8.1 Resistance to 500 V DC
When a DC voltage of 500 V is applied, the resistance shall be at least 100 kΩ.
2.8.2 Resistance to 2500 V AC
No insulation breakdown and/or arcing shall occur when an AC voltage of 2500 V 50 Hz is applied.
2.9 Resistance against effect of elevated temperature
The insulation union coupling shall be made of incombustible materials capable of withstanding a temperature of 425
0
C for 900 s without the cohesion of the coupling being adversely affected.
2.10 Marking and documentation
2.10.1 Marking on union couplings
A permanent inscription shall be placed on each insulation union coupling in a clearly visible location that includes
the following information:
1. the GASTEC QA word mark or logo;
2. nominal dimensions in mm;
3. the name of the manufacturer or the trademark;
4. a type indication;
5. the flow direction if not intended for two directions.
2.10.2 Instructions
The manufacturer shall also supply assembly instructions in Dutch.
Installation instructions shall be provided for every insulation union coupling. If the insulation union coupling consists
of separate components, the assembly of the separate components shall be clearly indicated in the installation
instructions.
At the same time, it shall be stated that the insulation union couplings shall not be contaminated during assembly.
These insulation union couplings shall be installed inside buildings and shall be installed after the main shutoff valve.
The installation instructions prescribe the torque to tighten the insulation union coupling.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
3 Testing methods
3.1 Sequence
The inspection of the insulation union coupling shall be done in the sequence indicated.
3.2 Components of the insulation union coupling
3.2.1 Visual inspection
The inspection of the insulation union coupling is done visually and using measurement equipment. In this, it is
particularly important to note the dimensions stated in paragraph 2.5.3 for the threaded connections and in paragraph
2.7.1 for the clearance and creepage distances.
3.3 Testing the insulation and leak tightness when applying mechanical loads
3.3.1 Test pressure
Air at 1.1 barg pressure (overpressure) is used as a medium for testing.
3.3.2 Leak tightness test methode
The leak tightness tests may be carried out by those methods used in national laboratories, providing these methods
give reproducible results.
3
3
The uncertainty of measurement shall not be greater then 5 cm /h and the resolution shall be 1 cm /h.
3.3.3 Leak tightness when tightened with specified torque
The insulation union coupling shall be tightened with a torque of 6 Nm per mm of the nominal diameter.
A leak tightness test is performed during 600 s at a temperature of 23 ± 3C.
3
During this test, the leakage rate shall be less then 30 cm /h.
Afterwards the union coupling shall be loosened. During the tests as described in par. 3.3.4 to 3.5, the union coupling
shall be fastened according to the instructions of the manufacturer.
3.3.4 Leak tightness after exposure to loads
The testing of the insulation union coupling for gas-tightness is done by placing the insulation union coupling in an
oven at a temperature of 120 °C. Once the insulation union coupling has reached a temperature of 120 °C, it is kept
at this temperature for 300 s and then cooled to room temperature in still air.
Then the following loads will be applied successively:
a.
b.
c.
An axial tensile force in accordance with table 1 during 600 s at a temperature of 23 ± 3C.
An axial compressive force in accordance with table 1 during 600 s at a temperature of 23 ± 3C.
A torsional moment in accordance with table 1 or a torsional moment corresponding to an angular deviation
0
of 45 . First during 600 s at a temperature of 50 ± 3C, then during 600 s at a temperature of
-5 ± 3C.
After the last load has been removed, three gas-tightness tests are performed during 600 s each at temperatures of 5 ± 3 C , 23 ± 3C and +50 ± 3 °C. During each of the leak tightness tests, the leakage rate shall be less then 30
3
cm /h.
3.3.5 Insulation and leak tightness during and after bending
The test piece from paragraph 3.3.3.c is then blown dry and stored for 24 hours in a chamber with a relative humidity
of 40%.
At a temperature of 23 ± 3C, the test piece is then loaded with a bending moment in accordance with Table 1. For
the test, the test piece is placed on two support points and loaded in the middle of the support spacing. The support
points are positioned 800 mm from each other. First, the test pressure is applied. The load P is increased every
minute by 20% of its end value and registered using a recorder that is connected. For the chosen test setup, the
following applies to the bending moment Mb:
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
Mb = P ∙ L/4
If L = 0.8 then Mb = 0.2 ∙ P in Nm; load P = 5 ∙ Mb in N.
During a test period of 300 s, no short circuit shall occur in the insulated part (to be checked with 24 V AC voltage).
3
The leak tightness is then tested for 600 s while applying the load. The leakage rate shall be less then 30 cm /h.
After that the load is removed. The leak tightness is then tested for 600 s at temperatures of -5 ± 3 C,
3
23 ± 3C and +50 ± 3 °C. The leakage rate shall be less then 30 cm /h.
3.4 Effectiveness of the insulation at high humidity
For testing, the insulation union coupling mentioned in paragraph 3.3 is blown dry and placed in a chamber for 48
hours at a temperature of 23 ± 3C and a relative humidity of 93% to 95%.
The insulation union coupling shall take up a maximum of 1/10th of the volume of the chamber. Immediately after the
insulation union coupling is taken out of the chamber, it is subjected to a DC voltage of 500 V, with the resistance
being measured. This electrical resistance shall be at least 100 kΩ.
The insulation union coupling is then subjected to an AC voltage of 2500 V, 50 Hz. The voltage is increased in 10 s
from 0 to 2500 V. The voltage is maintained for 60 s. No insulation breakdown or arcing shall occur during the test.
3.5 Resistance to high temperature
The insulation union coupling is placed in an oven at a temperature of 425 °C ± 10 °C for 900 s. The cohesion of the
coupling being shall not be adversely affected.
3.6 Resistance to liquid pentane
Resistance against the action of liquid pentane is determined for components made of plastic.
Two test pieces of about 2 grams with an thickness of about 2 mm (if necessary the entire component) are weighed
to 0.1% accuracy after which they are submerged in liquid pentane at room temperature for 3 x 24 hours.
The volume of the pentane shall be at least 25 x the volume of the test piece.
Immediately after the test pieces are removed from the pentane, and dried with filter paper if necessary, the weight is
determined to 0.1% accuracy.
The weight change shall be no more than the following relative to the original weight:
 15% weight for components that provide external gas-tightness, 20% for other components;
The test piece is then stored for 24 hours at room temperature and the weight is again determined to 0.1% accuracy.
The weight change shall be no more than the following relative to the original weight:
 10% for components that provide external gas-tightness, 15% for other components.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
4 Quality system requirements
4.1 General
This chapter contains the requirements that have to be fulfilled by the manufacturer‟s quality system.
4.2 Manager of the quality system
Within the manufacturer‟s organisational structure an employee must be appointed who is in charge of managing the
quality system.
4.3 Internal quality control/quality plan
As part of the quality system the manufacturer must implement an internal quality control schedule (IQC-scheme).
In this IQC-scheme the following must be demonstrably recorded:
 which aspects are inspected by the manufacturer;
 according to which methods these inspections are carried out;
 how often these inspections are carried out;
 how the inspection results are registered and stored.
This IQC-schedule shall be in the format as shown in the annex. The schedule must be detailed in such a way that it
provides Kiwa sufficient confidence that requirements will be continuously fulfilled.
4.4 Procedures and work instructions
The manufacturer must be able to submit:
 Procedures for:
- the handling of non-conforming products;
- corrective actions in case non-conformities are found;
- the handling of complaints regarding the products and / or services supplied;
 the work instructions and inspection sheets in use
 instructions for packaging and closing off of products during storage and transport.
4.5 Other Quality system requirements
The quality system of the production location shall be ISO 9001 certified. The ISO 9001 quality system may be
combined with the IQC scheme.
Gastec QA Approval requirements
© Kiwa Nederland B.V.
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KE 154
March 2012
5 Summary of tests and inspections
This chapter contains a summary of tests and inspections to be carried out during:
Initial evaluation: the investigation necessary in order to determine whether all requirements of the evaluation
guideline are fulfilled,
Inspection visit: the surveillance inspections carried out after issuing the certificate in order to determine whether
the certified products continuously fulfil the requirements of this evaluation guideline. The inspections are carried out
according to the frequency indicated.
Inspection of the quality system: inspection with regard to the correct implementation of the IQC-schedule and
procedures.
5.1 Test matrix insulation union couplings in gas conduits up to 50 mm nominal diameter
Description of requirement
Clause
guideline or
standard
General requirements to be met by the
insulation union coupling
Error-free installation
Durability
Visual inspection
Materials & construction
Fit for use
Resistance to gas
Rubber quality
Metals
Diameter
Threaded connections
Use in metal components
Insulation
Dimensions
Design of the insulation components
Clearance and creepage distances
Dirt protected clearance and creepage distances
Marking on union couplings
Instructions
Testing
Leak tightness when tightened with specified torque
Leak tightness after exposure to loads
Insulation and leak tightness during and after
bending
Effectiveness of the insulation at high humidity
Resistance to high temperature
Resistance to liquid pentane
1)
2)
Test within the scope of
Initial
Surveillance by CI after
1)
evaluation
issue of the certificate
2)
tests
Inspection
Frequency
2.2
2.2.1
2.2.2
3.2.1
X
X
X
2.3.1
2.3.2
2.3.3
2.3.4
2.4.2
2.5
2.5.1
2.5.2
2.5.3
2.7
2.7.1
2.7.2
2.10.1
2.10.2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
3.3.3
3.3.4
3.3.5
3.4
3.5
3.6
X
once a year
X
once a year
X
once a year
X
once a year
X
X
X
X
once a year
once a year
once a year
once a year
X
X
X
X
X
X
once a year
once a year
once a year
X
X
X
X
X
once a year
once a year
In case the product or production process changes significantly, the performance requirements shall be
determined again with respect to paragraph 13 of the “Kiwa regulations for product certification”.
All product properties that can be determined within the visiting time (maximum 1 day) are determined by the
inspector or by the supplier in the presence of the inspector. In case this is not possible, an agreement will
be made between the certification body and the supplier about how the inspection will take place.
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5.2 Evaluation of the quality system
During each inspection visit the quality system of the supplier shall be examined and evaluated.
5.3 Frequency of external audits
The frequency of external audits is set at 2 audits per year at the production location and/or supplier.
Gastec QA Approval requirements
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6 Agreements on the performance of certification
6.1 General
This chapter contains the by the Board of Experts elaborated agreements on the performance of certification by
Kiwa.
6.2 Certification staff
The staff involved in the certification process is sub-divided into:
 Certification engineers: in charge of carrying out the pre-certification tests and assessing the reports of the
inspectors;
 Inspectors: in charge of carrying out external inspections at the supplier‟s works;
 Decision-makers: in charge of taking decisions in connection with the pre-certification tests performed,
continuing the certification in connection with the inspections performed and taking decisions with regard to
corrective actions.
6.3 Qualification requirements for executive staff of CI that fulfil the requirements of EN 45011
The qualification of the executive staff of a CI must fulfil the requirements of EN 45011.
The way qualification of the staff is performed must be described in the quality manual of the CI.
EN45011
1
Education,
general
2
Education,
specific
3
Experience,
general
4
Experience,
specific
Auditor (A)
pre-certification tests
and inspections of
companies
Inspector (B)
factory, field & project
visits and follow-up
inspections
Decision maker (C)
person deciding on
granting of certificate
Relevant tech. thinking
and working level
comparing to Bachelor
Internal training in
certification and Kiwa
policies
Training in audit skills
Tech. thinking and
working level at
vocational education
(intermediate level)
Internal training in
certification and Kiwa
policies
Training in audit skills
Training geared towards
this guideline
Specific courses and
training (knowledge and
skills)
1 year of relevant working
experience with a
minimum of 4 tests, 1 of
which independently,
under supervision
Thinking and working at
Bachelor level
Internal training in
certification and Kiwa
policies
Training in audit skills
Detailed knowledge of
certification and 4 tests
relating to the specific
guideline or to guidelines
which are related to each
other
Basic knowledge of the
specific certification
Training geared towards
this guideline
Specific courses and
training (knowledge and
skills)
1 year of relevant
working experience with
a minimum of 4 tests of
which: 1 complete precertification test
independently, under
supervision
Detailed knowledge of
certification and 4 tests
relating to this specific
guideline or to
guidelines which are
related to each other.
not applicable
4 years of working
experience, with a
minimum of 1 year of
experience with
certification
6.4 Qualification requirements for executive staff of a CI that are in addition set up by the Board of
Experts for the subject of this evaluation guideline
No additional requirements are set up by the Board of Experts.
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6.5 Qualification
Certification staff must be demonstrably qualified by evaluation of education and experience of the above-mentioned
requirements. In case qualification takes place on the basis of other criteria, then this has to be recorded in writing.
The authority for qualification rests with:
 Decision-makers: qualification of the certification experts and inspectors;
 Management of the certification body: qualification of the decision-makers.
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7 List of mentioned documents
7.1 Standards/ normative documents
All normative references in this Approval Requirements refer to the editions of the standards as mentioned in the list
below.
Sorted by number:
NEN-EN-ISO 2281:2003
NEN-EN
437:2003+A1:2009
NEN-EN 549:1995
NEN-EN
682:2002+A1:2005
NEN 2542:1967
NPR 7028:2008
NEN 7244-6:2005
NEN 7244-10:2010
NEN-EN 10226-1:2004
Pipe threads where pressure-tight joints are not made on the threads - Part
1: Dimensions, tolerances and designation
Test gases - Test pressures - Appliance categories
Rubber materials for seals and diaphragms for gas appliances and gas
equipment
Elastomeric seals - Materials requirements for seals used in
pipes and fittings carrying gas and hydrocarbon fluids
Fittings and connections with outside thread for gas conduits
Gas meters - Dimensions and connections
Gas supply systems - Pipelines for maximum operating pressures up to and
including 16 bar - Part 6: Specific functional requirements for service lines
Gas supply systems – Pipelines for maximum operating pressure up to and
including 16 bar – Part 10: Specific functional requirements for housing for
installations and housing for meters with a maximum inlet pressure of 100
3
mbar and a maximum design capacity of 650 mn /h
Pipe threads where pressure tight joints are made on the threads - Part 1:
Taper external threads and parallel internal threads - Dimensions,
tolerances and design.
7.2 Replacement(s) of standard/ normative documents
Sorted by number:
Old Document
NEN 176:1972
Fastening pipe thread - Basic
dimensions
Replaced by
NEN-EN-ISO 228-1
NEN 3258:1972
Pressure-tight pipe thread
EN 10226-1:2004
(for R & Rp threads)
Gastec QA Approval requirements
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Replacement’s title
Pipe threads where pressure-tight
joints are not made on the threads
- Part 1: Dimensions, tolerances
and designation
Pipe threads where pressure tight
joints are made on the threads Part 1: Taper external threads and
parallel internal threads Dimensions, tolerances and
design.
KE 154
March 2012
I Appendix A: Model IQC-scheme or frame-IQCscheme
Subject
Incoming control
supplied
materials
Compound
Production
process
Procedures
Work instructions
Used apparatus
Aspect
Frequency
Registration
Material data
sheets
Material
Certificates
Manufacture
Applied inspection
methods
Inspection
frequency
Registration and
Recording
inspection results.
Finished product
inspection
Appearance
Marking
Contamination
Status of
measuring and
test equipment
Measure
equipment
Test equipment
Calibration
Logistics
Internal transport
Storage
Packaging
Preservation
Identification
Marking
Procedure non
conforming
Registration and
Recording
Settlement
Registration and
Recording
Settlement
Complaints
procedure
Method
Gastec QA Approval requirements
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Number
Replaces
--
Issued
Scope
KE 154
Report number
Page
Contract number
Product Certificate
Insulation union couplings in gas conduits up to 50 mm nominal
diameter
Based on pre-certification tests as well as periodic inspections by Kiwa
Nederland B.V., the products referred to in this certificate and marked
with the GASTEC QA mark, supplied by
Manufacturer
may, on delivery, be relied upon to comply with the
GASTEC QA Approval Requirements 154, Insulation union couplings
in gas conduits up to 50 mm nominal diameter.
Bouke Meekma
Kiwa
This certificate is issued by Kiwa Nederland B.V. in conjunction with
the “Kiwa Regulations for carrying the GASTEC QA quality mark”.
This certificate consists of .. pages.
Publication of the certificate is allowed.
Kiwa Nederland B.V.
Wilmersdorf 50
P.O. Box 137
7300 AC APELDOORN
The Netherlands
Tel.+31- 55 539 33 55
Fax +31- 55 539 36 76
www.kiwa.nl
Company
………..
……………..
……………….
P.O. Box
……………
www…………..
T
F
Gastec QA Approval requirements
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Insulation union couplings in gas conduits up to 50 mm nominal
diameter
PRODUCT SPECIFICATION
APPLICATION AND USE
8
An insulation union coupling is understood to mean a part of a gas conduit for the distribution of natural gas and LPG in gaseous phase, with
which a removable pipe connection is created that is not electrically conductive.
9
The insulation union couplings will be installed inside buildings after the main shutoff valve. The insulation union couplings have a maximum
nominal diameter of 50 mm. The insulation union couplings can be supplied as a loose unit or in combination with devices, and are used in gas
conduits that are suitable for gas pressure up to 1 bar.
MARKING

The products are clearly visible marked with the following information:
a)
the GASTEC QA word mark or logo;
b)
nominal dimensions in mm;
c)
the name of the manufacturer or the trademark;
d)
a type indication;
e)
the flow direction if not intended for two directions.
Place of the mark:

on each insulation union coupling
Compulsory specifications:
Method of marking:

Permanent marking.
RECOMMENDATIONS FOR CUSTOMERS:
1.
1.1
Check at the time of delivery whether:
The manufacturer or supplier has delivered in accordance
with the agreement;
1.2
the mark and the marking method are correct;
1.3
the products show no visible defects as a result of transport
3.
etc.
2.
and transport methods.
If you should reject a product on the basis of the above, please
contact:
2.1
Consult the producer's processing guidelines for the proper storage
4.
Check whether this certificate is still valid by consulting Kiwa
Nederland BV or the Kiwa website.
Manufacturer
and, if necessary,
2.2
Kiwa Nederland B.V.
Gastec QA Approval requirements
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