EN ISO 13758:1996/A1:2020

Liquefied petroleum gases - Assessment of the dryness of propane - Valve freeze method - Amendment 1 (ISO 13758:1996/Amd 1:2020)

Flüssiggase - Prüfung auf Trockenheit von Propan - Ventileinfrier-Verfahren (ISO 13758:1996/Amd 1:2020)

[Not available]

Gaz de pétrole liquéfiés - Évaluation de la siccité du propane - Méthode de givrage de vanne - Amendement 1 (ISO 13758:1996/Amd 1:2020)

Utekočinjeni naftni plini - Ocenjevanje suhosti propana - Metoda z zaledenitvijo ventila - Dopolnilo 1 (ISO 13758:1996/Amd 1:2020)

General Information

• Status: Published
• Publication Date: 18-Feb-2020
• Withdrawal Date: 30-Aug-2020
• ICS: 75.160.30 - Gaseous fuels
• Technical Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Drafting Committee: CEN/TC 19 - Petroleum products, lubricants and related products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Feb-2020
• Completion Date: 19-Feb-2020
• Ref Project: SIST EN ISO 13758:1998/A1:2020 - Liquefied petroleum gases - Assessment of the dryness of propane - Valve freeze method - Amendment 1 (ISO 13758:1996/Amd 1:2020)

Relations

• Amends: EN ISO 13758:1996 - Liquefied petroleum gases - Assessment of the dryness of propane - Valve freeze method (ISO 13758:1996)
• Effective Date: 31-Oct-2018

Overview - EN ISO 13758:1996/A1:2020 (Valve freeze method for propane dryness)

EN ISO 13758:1996/A1:2020 is a CEN-adopted amendment to ISO 13758:1996 that updates the standardized valve freeze method for assessing the dryness (water content risk) of propane in liquefied petroleum gases (LPG). The amendment adds a mandatory apparatus verification clause and a normative Annex A that defines a verification procedure to ensure correct flow through the test valve before carrying out the freeze test.

Key topics and technical requirements

• Purpose: Assessment of the dryness of propane using the valve freeze technique to detect moisture that could cause valve icing or downstream operational issues.
• New normative references:
  • Replaces the previous citation of ISO 4257:1988 with ISO 4257 - Liquefied petroleum gases: Method of sampling.
• Apparatus verification (new Clause 7):
  • Verify correct flow rate through the test valve per Annex A; valves failing verification or suspected defective must be reconditioned/recalibrated by the manufacturer.
• Annex A - Verification of correct flow rate (normative):
  • Required equipment:
    • Flow meter calibrated in ml/min, readable in the 500–900 ml/min range.
    • Reference valve with a flow-rate calibration certificate.
    • Adaptor and seal to connect valve vent hole to flow meter.
  • Verification gas and conditions:
    • Nitrogen at 275 kPa ± 5 kPa at 21 °C.
  • Key procedural points:
    • Measure flow via the valve side vent with valve in analysis mode.
    • Do not use purge mode with the flow meter (purge ≈ 5 l/min may damage meter).
    • Reference valve check: 700 ml/min ± 100 ml/min.
    • Test valve acceptance: flow must be between 600 ml/min and 800 ml/min.
    • If out of range, adjust per manufacturer’s instructions or return valve for recalibration.

Applications and who uses this standard

• Primary users:
  • LPG producers, bottlers and distributors
  • Quality control and testing laboratories
  • Valve and cylinder manufacturers
  • Inspection bodies, safety auditors, and regulatory agencies
• Practical uses:
  • Pre-use verification of valve function before conducting the valve-freeze dryness test
  • Routine QA to prevent valve icing, unsafe deliveries, equipment failure or customer complaints
  • Supporting compliance with national/regional LPG safety and quality requirements

Related standards and context

• ISO 13758:1996 (original standard) - valve freeze method for propane dryness
• ISO 4257 - Liquefied petroleum gases - Method of sampling (now the normative sampling reference)
• Developed by ISO/TC 28 and adopted by CEN; applicable across CEN member countries

Keywords: EN ISO 13758, ISO 13758 amendment, propane dryness, valve freeze method, liquefied petroleum gases, flow rate verification, LPG testing, CEN standard.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2020
Utekočinjeni naftni plini - Ocenjevanje suhosti propana - Metoda z zaledenitvijo
ventila - Dopolnilo 1 (ISO 13758:1996/Amd 1:2020)
Liquefied petroleum gases - Assessment of the dryness of propane - Valve freeze
method - Amendment 1 (ISO 13758:1996/Amd 1:2020)
Flüssiggase - Prüfung auf Trockenheit von Propan - Ventileinfrier-Verfahren (ISO
13758:1996/Amd 1:2020)
Gaz de pétrole liquéfiés - Évaluation de la siccité du propane - Méthode de givrage de
vanne - Amendement 1 (ISO 13758:1996/Amd 1:2020)
Ta slovenski standard je istoveten z: EN ISO 13758:1996/A1:2020
ICS:
75.160.30 Plinska goriva Gaseous fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 13758:1996/A1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 75.160.30
English Version
Liquefied petroleum gases - Assessment of the dryness of
propane - Valve freeze method - Amendment 1 (ISO
13758:1996/Amd 1:2020)
Gaz de pétrole liquéfiés - Évaluation de la siccité du Flüssiggase - Prüfung auf Trockenheit von Propan -
propane - Méthode de givrage de vanne - Amendement Ventileinfrier-Verfahren (ISO 13758:1996/Amd
1 (ISO 13758:1996/Amd 1:2020) 1:2020)
This amendment A1 modifies the European Standard EN ISO 13758:1996; it was approved by CEN on 17 February 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of
this amendment into the relevant national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This amendment exists 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-CENELEC 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13758:1996/A1:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 13758:1996/A1:2020) has been prepared by Technical Committee ISO/TC 28
"Petroleum and related products, fuels and lubricants from natural or synthetic sources" in
collaboration with Technical Committee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related
products of petroleum, synthetic and biological origin.” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13758:1996/Amd 1:2020 has been approved by CEN as EN ISO 13758:1996/A1:2020
without any modification.
INTERNATIONAL ISO
STANDARD 13758
First edition
1996-12-15
AMENDMENT 1
2020-01
Liquefied petroleum gases —
Assessment of the dryness of propane
— Valve freeze method
AMENDMENT 1
Gaz de pétrole liquéfiés — Évaluation de la siccité du propane —
Méthode de givrage de vanne
AMENDEMENT 1
Reference number
ISO 13758:1996/Amd.1:2020(E)
©
ISO 2020
ISO 13758:1996/Amd.1:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of
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