oSIST prEN 16125:2010
(Main)LPG equipment and accessories - Pipework systems and supports - LPG liquid phase and vapour pressure phase
LPG equipment and accessories - Pipework systems and supports - LPG liquid phase and vapour pressure phase
This standard specifies the requirements for the design, construction, testing, commissioning, operation and maintenance of LPG pipework in the liquid phase and at full vapour pressure.
This standard is not applicable to:
- pipelines and their accessories;
- pipework for the propulsion of road vehicles or boats;
- pipework on ships.
This standard is applicable to installation pipework having a maximum operating pressure less than or equal to 30 bar.
This standard is applicable to new installation pipework as well as to replacements of, or extensions to, existing installation pipework.
Flüssiggas-Geräte und -Ausrüstungsteile - Rohrleitungssysteme und -befestigungen - Flüssigphase und ungeregelte Gasphase von Flüssiggas (LPG)
Diese Europäische Norm legt Anforderungen an Auslegung, Bau, Prüfung, Inbetriebnahme, Betrieb und
Wartung von Rohrleitungen für Flüssiggas (LPG, en: Liquefied Petroleum Gas) in der Flüssigphase und bei
vollständigem Gasdruck fest.
Diese Norm gilt nicht für:
⎯ Rohrfernleitungen und ihre Ausrüstungsteile;
⎯ Rohrleitungen für Antriebsanlagen von Straßenfahrzeugen oder Booten;
⎯ Rohrleitungen auf Schiffen.
Diese Norm gilt für Rohrleitungsinstallationen mit einem maximalen Betriebsdruck bis einschließlich 30 bar.
Diese Norm gilt für neue Rohrleitungsinstallationen sowie für den Austausch oder die Erweiterung von
vorhandenen Rohrleitungsinstallationen.
Oprema in pribor za utekočinjeni naftni plin (UNP) - Cevovodi in pritrjevanje - UNP tekoča in parna faza
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 16125:2010
01-oktober-2010
2SUHPDLQSULERU]DXWHNRþLQMHQLQDIWQLSOLQ 813 &HYRYRGLLQSRGSRUQLHOHPHQWL
813WHNRþDID]DLQSDUQDID]DSRGWODNRP
LPG equipment and accessories - Pipework systems and supports - LPG liquid phase
and vapour pressure phase
Flüssiggas-Geräte und -Ausrüstungsteile - Rohrleitungssysteme und -befestigungen -
Flüssigphase und ungeregelte Gasphase von Flüssiggas (LPG)
Ta slovenski standard je istoveten z: prEN 16125
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
75.200 2SUHPD]DVNODGLãþHQMH Petroleum products and
QDIWHQDIWQLKSURL]YRGRYLQ natural gas handling
]HPHOMVNHJDSOLQD equipment
oSIST prEN 16125:2010 en,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 16125:2010
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oSIST prEN 16125:2010
EUROPEAN STANDARD
DRAFT
prEN 16125
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2010
ICS 23.040.01
English Version
LPG equipment and accessories - Pipework systems and
supports - LPG liquid phase and vapour pressure phase
Flüssiggas-Geräte und Ausrüstungsteile -
Flüssiggas(LPG)-Verrohrung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 286.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16125:2010: E
worldwide for CEN national Members.
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Contents Page
Foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .8
4 Design safety considerations . 10
4.1 General . 10
4.2 Environmental considerations . 10
4.3 Protection against hazards . 10
4.3.1 Resistance to corrosive substances and atmospheres . 10
4.3.2 Protection against variations in the operating pressure . 10
4.4 Protection against condensation . 11
5 Materials . 11
5.1 General . 11
5.2 New materials and new components . 11
5.3 Reuse of materials and components . 11
5.4 Pipe threads, threaded pipe fittings, flanged pipe joints and welded pipe joints . 12
5.5 Regulators and accessories . 12
5.6 Gaskets and ring joints . 12
5.7 Valves and fittings . 12
6 Design . 12
6.1 General . 12
6.2 Installation drawings . 13
6.3 Measuring instruments . 13
6.4 Pressure protection . 13
6.5 Fluid velocity . 14
6.6 Aboveground pipework . 14
6.6.1 Clearance above ground . 14
6.6.2 Pipework separation distances from above ground electrical conduit, wire, cable or
earthing electrode . 14
6.6.3 Ventilation of concealed piping . 14
6.7 Pipe supports . 15
6.8 Underground piping . 16
6.8.1 General . 16
6.8.2 Pipework separation distances from other underground services . 16
6.8.3 Pipework crossover separation distances from other services . 16
6.9 Jointing . 17
6.10 Flexibility of Piping . 17
6.11 Earthing & Bonding . 17
6.12 Plant piping materials and duty limits for Liquid/vapour phase . 17
7 Identification & corrosion protection of above ground pipework . 21
7.1 General . 21
7.2 Paint . 21
7.3 Pipework markers for above ground LPG pipework . 21
7.4 Colour Coding . 21
7.5 Reflectivity . 21
8 Documentation, inspection and testing. . 22
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8.1 General . 22
8.2 Documentation . 22
8.2.1 General . 22
8.2.2 Technical file . 22
8.3 Inspection and testing . 23
9 Maintenance . 23
Annex A (informative) Pipework Integrity Management Systems (PIMS) . 24
A.1 Pipework Integrity Management . 24
A.2 Basic PIMS for LPG plants . 24
A.3 Inspection (measurement) . 24
A.4 Assessment of condition . 25
A.5 Response (remedial action/ future monitoring or inspection) . 25
A.6 Frequency of inspection and maintenance . 26
Annex B (normative) Pipe sizing tables – liquid phase . 29
B.1 General . 29
B.2 Viscosity of LPG . 29
B.3 Calculation of liquid velocity flow in pipework . 29
B.4 Calculation of Reynolds number . 30
B.5 Liquid flow capacity and pressure drop in pipework . 30
B.6 Liquid flow capacity and pressure drop through valves and fittings . 31
Annex C (normative) Pipe sizing tables – Gas phase . 33
C.1 General . 33
C.2 Calculation of full vapour flow and pressure drop in pipework . 33
C.3 Vapour flow capacity and pressure drop through valves and fittings . 34
Annex D (informative) Purging of pipework . 35
D.1 General . 35
D.2 Precautions before purging. 35
D.3 Purging procedures . 35
D.4 Purging guidelines – clearing purge . 36
D.5 Design considerations . 36
D.5.1 Vents . 36
D.5.2 Purge pressure . 36
D.5.3 Purge rate . 36
D.5.4 Purge time . 37
Annex E (informative) Environmental checklist. 38
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Foreword
This document (prEN 16125:2010) has been prepared by Technical Committee CEN/TC 286 “Liquefied
petroleum gas equipment and accessories”, the secretariat of which is held by NSAI.
This document is currently submitted to the CEN Enquiry.
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Introduction
This European Standard calls for the use of substances and procedures that may be injurious to health and/or
the environment if adequate precautions are not taken. It refers only to technical suitability and does not
absolve the user from legal obligations at any stage.
Protection of the environment is a key political issue in Europe and elsewhere. Protection of the environment
is taken in a very broad sense. What is meant is the total life cycle aspects of, e.g. a product on the
environment, including expenditure of energy and during all phases from mining of raw materials, fabrication,
packaging, distribution, use, scrapping, recycling of materials, etc.
NOTE Annex F indicates which clauses in this standard address environmental issues.
It is recommended that manufacturers develop an environmental management policy. For guidance see
ISO 14000 series It has been assumed in the drafting of this European Standard that the execution of its
provisions is entrusted to appropriately qualified and experienced people.
All pressures are gauge unless otherwise stated.
NOTE This standard requires measurement of material properties, dimensions and pressures. All such
measurements are subject to a degree of uncertainty due to tolerances in measuring equipment etc. It may be beneficial
to refer to the leaflet “measurement uncertainty leaflet (SP INFO 2000 27 uncertainty pdf)”
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1 Scope
This standard specifies the requirements for the design, construction, testing, commissioning, operation and
maintenance of LPG pipework in the liquid phase and at full vapour pressure.
This standard is not applicable to:
pipelines and their accessories;
pipework for the propulsion of road vehicles or boats;
pipework on ships.
This standard is applicable to installation pipework having a maximum operating pressure less than or equal
to 30 bar.
This standard is applicable to new installation pipework as well as to replacements of, or extensions to,
existing installation pipework.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 751-1, Sealing Materials for Metallic Threaded Joints in Contact with 1st, 2nd and 3rd Family Gases and
Hot Water - Part 1: Anaerobic Jointing Compounds
EN 751-2, Sealing Materials for Metallic Threaded Joints in Contact with 1st, 2nd and 3rd Family Gases and
Hot Water - Part 2: Non-Hardening Jointing Compounds
EN 751-3, Sealing Materials for Metallic Threaded Joints in Contact with 1st, 2nd and 3rd Family Gases and
Hot Water - Part 3: Unsintered PTFE Tapes
EN 1044, Brazing - Filler Metals
EN 1045, Brazing - Fluxes for Brazing - Classification and Technical Delivery Conditions
EN 1057, Copper and Copper Alloys - Seamless, Round Copper Tubes for Water and Gas in Sanitary and
Heating Applications
EN 1092-1, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated - Part 1: Steel flanges,
EN 1092-3, Flanges and their joints — Circular flanges for pipes, valves, fittings and accessories, PN
designated Part 3: Copper alloy flanges.
EN 1254-1, Copper and Copper Alloys - Plumbing Fittings - Part 1: Fittings with Ends for Capillary Soldering
or Capillary Brazing to Copper Tubes
EN 1254-2, Copper and Copper Alloys - Plumbing Fittings - Part 2: Fittings with Compression Ends for Use
with Copper Tubes
EN 1254-5, Copper and Copper Alloys - Plumbing Fittings - Part 2: Fittings with Compression Ends for Use
with Copper Tubes Part 5: Fittings with Short Ends for Capillary Brazing to Copper Tubes
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EN 1515-1, Flanges and their joints - Bolting - Part 1: Selection of bolting
EN 10088-3, Stainless steels Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire,
sections and bright products of corrosion resisting steels for general purposes
EN 10208-1, Steel pipes for pipelines for combustible fluids — Technical delivery conditions Part 1: Pipes of
requirement class A
EN 10216-5, Seamless steel tubes for pressure purposes — Technical delivery conditions — Part 5: Stainless
steel tubes
EN 10217-7, Welded steel tubes for pressure purposes Technical delivery conditions Part 7: Stainless steel
tubes
EN 10226-1, Pipe threads where pressure tight joins are made on the threads Part 1: Taper external threads
and parallel internal threads dimensions, tolerances and designation
EN 10226-2, Pipe threads where pressure tight joins are made on the threads - Part 2: Taper, external
threads and taper internal threads
EN 10226-3, Pipe threads where pressure tight joins are made on the threads - Part 3: Verification by means
of limit gauges
EN 10253-2, Butt-welding pipe fittings — Part 2: Non alloy and ferritic alloy steels with specific inspection
requirements
EN 10255, Non-alloy steel tubes suitable for welding and threading — Technical delivery conditions
EN 12007-1, Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part
1: General functional recommendation
EN 12007-3, Gas infrastructure - Pipelines for maximum operating pressure up to and including 16 bar - Part
3: Specific functional requirements for steel
EN 12266-1, Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and
acceptance criteria - Mandatory requirements
EN 12266-2, Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and acceptance
criteria - Supplementary requirements
EN 13175, LPG equipment and accessories - Specification and testing for Liquefied Petroleum Gas (LPG)
tank valves and fittings
EN 13480-2, Metallic industrial piping - Part 2: Materials
EN 14324, Brazing - Guidance on the application of brazed joints
EN 15001-1:2006, Gas Infrastructure - Gas installation pipework with an operating pressure greater than
0,5 bar for industrial installations and greater than 5 bar for industrial and non-industrial installations - Part 1:
Detailed functional requirements for design, materials, construction, inspection and testing
EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads - Part 1: Dimensions,
tolerances and designation (ISO 228-1:2000)
EN ISO 9453, Soft solder alloys - Chemical compositions and forms (ISO 9453:2006)
EN ISO 9454-2, Soft soldering fluxes - Classification and requirements - Part 2: Performance requirements
(ISO 9454-2:1998)
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EN ISO 10497, Testing of valves - Fire type-testing requirements (ISO 10497:2010)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
accessible
access can be gained without hazard or undue difficulty for inspection, repair, renewal, or operational
purposes
3.2
commissioning
Activities performed to put pipework into operation in accordance with the design.
3.3
competent person
Person, who is trained, experienced and approved to perform activities relating to gas pipework.
3.4
critical velocity
The velocity at which turbulent flow begins.
3.5
design pressure (DP)
Pressure at which the design calculations are based
3.6
fitting
A component used to join pipes, or to change direction or diameter of a pipe, or to provide a branch, or to
terminate a pipe.
3.7
gas installation
A combination of the following used or intended to be used in the supplying and utilisation of gas, taken as
separate items or as a whole: Consumer piping, fittings, components, appliances, flues, sub-meters,
apparatus or other devices and associated requirements.
3.8
interlock
A device or function that ensures that the operation of items of equipment is dependent upon the fulfilment of
predetermined conditions by other items of equipment.
3.9
joint
Means of joining elements of a gas installation
3.10
LPG (liquefied petroleum gas)
mixture of predominantly butane or propane with traces of other hydrocarbon gases classified in accordance
with UN number 1965, hydrocarbon gases mixture, liquefied, NOS or UN number 1075, petroleum gases,
liquefied
NOTE In some countries, UN numbers 1011 and 1978 may also be designated LPG.
3.11
maximum incidental pressure (MIP)
Maximum pressure at which a system can experience during a short time, limited by the safety devices
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3.12
maximum operating pressure (MOP)
Maximum pressure at which a system can be operated continuously under normal operating conditions
3.13
mechanical joint
Joint in which gas tightness is achieved by compression with or without a seal.
Note This joint can be readily disassembled and reassembled.
3.14
nominal size (DN)\nominal diameter (DN)
A numerical designation of size, in millimetres (mm) which is common to all components in a piping system
other than components designated by outside diameters or by thread size. It is a convenient round number
for reference purposes and is only loosely related to manufacturing dimensions.
3.15
non-return valve
A valve designed to operate automatically to prevent reversal of flow in a pipe.
3.16
operation pressure(OP)
Pressure which occurs within a system under normal operating conditions
3.17
design pressure
pressure for which the designer allows in specifying materials and construction methods in order that the
pipework will withstand the maximum incidental pressure, tightness test pressure or strength test as
applicable
3.18
pressure
Pressure above atmospheric pressure, or gauge pressure.
3.19
purge/purging/purged
With respect to consumer piping means—
(a) replacing the air in consumer piping with gas or inert gas; or
(b) removing the gas, liquid or vapour phase from consumer piping by replacing the gas with either air or an
inert gas.
NOTE The purpose of purging is to prevent the presence in the piping of an explosive mixture of gas and air.
3.20
sleeve
Protective pipe through which a gas pipe passes.
3.21
strength test
Specific procedure intended to verify that the pipework meets the requirements for mechanical strength.
3.22
strength test pressure (STP)
pressure applied to pipework during strength testing
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3.23
thread joint
joint in which tightness is achieved by metal to metal contact within threads with the assistance of a sealant.
3.24
tightness test pressure
Pressure applied to pipework during tightness testing
3.25
pipeline
Piping designed for the conveyance of any fluid or substance to or from an installation (onshore or offshore)
starting from and including the last isolation device located within the confines of the installation, including all
the annexed equipment designed specifically for pipelines
NOTE This definition is extracted from 97/23/EC (PED)
4 Design safety considerations
4.1 General
4.1.1 Any person who is responsible for the design of a LPG installation shall be a competent person.
4.1.2 The pipework designer shall provide information on the design and location of pipework to the
persons responsible for construction, installation and operation of pipework.
4.1.3 The pipework shall be designed, installed and constructed to allow testing and purging to be carried
out.
4.1.4 Above ground piping shall be protected against mechanical damage where necessary.
4.1.5 Pipework joints shall be kept to a minimum.
4.2 Environmental considerations
The designer shall consider the selection of pipe material and components with regard to the use of
production processes, practices, materials or products that avoid reduce or control pollution, including
recycling, treatment, process changes, control mechanisms, efficient use of materials and material
substitution.
NOTE Every product has some impact on the environment. These impacts may occur at any or all stages of the
product’s life cycle and can be local, regional or global, or a combination of all three.
4.3 Protection against hazards
4.3.1 Resistance to corrosive substances and atmospheres
Pipework including supports in contact with soil or building materials, which can be expected to contain
corrosive substances, or in contact with corrosive atmosphere shall be resistant to or protected against these
substances.
4.3.2 Protection against variations in the operating pressure
The designers of pipework shall take into consideration variations of operating pressures resulting from
ambient temperature fluctuation.
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4.4 Protection against condensation
For vapour pressure pipework covered by this standard, precaution shall be taken to avoid condensation
occurring in the pipe. The selection of pressure to be used is of great importance, especially in cold climates.
If the design pressure is too high or the temperature too low, the LPG will condense to a liquid. This is known
as the due point. The due point graph figure 1 indicates temperatures and pressures for propane, mixes of
propane/butane and butane. The area above each curve will cause gas to condense to a liquid.
Figure 1 – Due point graph
This may take the form of heat tracing the pipework or alternatively making the use of LPG air-mixture.
Alternatively a suitably located knock-out pot shall be installed in the line to allow condensation to collect and
subsequently boil off without causing overpressure problems.
5 Materials
5.1 General
Materials and components shall be free from damage and defects and shall be suitably selected for the
intended use.
5.
...
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