prEN 16125

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

• Status: Not Published
• Publication Date: 15-May-2012
• ICS: 23.040.01 - Pipeline components and pipelines in general
• Technical Committee: CEN/TC 286 - Liquefied petroleum gas equipment and accessories
• Drafting Committee: CEN/TC 286/WG 8 - LPG pipework
• Current Stage: 4098 - Decision to abandon - Enquiry
• Start Date: 09-Sep-2011
• Completion Date: 09-Sep-2011
• Directive: 97/23/EC - Directive 97/23/EC of the European Parliament and of the Council of 29 May 1997 on the approximation of the laws of the Member States concerning pressure equipment
• Mandate: M/071 - Mandate to CEN for standardization in the field of Pressure equipment
• Ref Project: oSIST prEN 16125:2010 - LPG equipment and accessories - Pipework systems and supports - LPG liquid phase and vapour pressure phase

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2010
2SUHPDLQSULERU]DXWHNRþLQMHQLQDIWQLSOLQ813&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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
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.

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
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 .
...