SIST EN 1439:2008
(Main)LPG equipment and accessories - Procedure for checking LPG cylinders before, during and after filling
LPG equipment and accessories - Procedure for checking LPG cylinders before, during and after filling
This European Standard specifies the procedures to be adopted when checking transportable refillable LPG cylinders before, during and after filling.
This European Standard applies to transportable refillable LPG cylinders of water capacity from 0,5 l up to and including 150 l. This European Standard does not apply to cylinders permanently installed in vehicles, or to plant and filling equipment.
This standard is applicable to the following:
welded and brazed steel LPG cylinders with a specified minimum wall thickness (see EN 1442 and EN 12807 or an equivalent standard);
welded steel LPG cylinders without specified minimum wall thickness (see EN 14140 or an equivalent standard);
welded aluminium LPG cylinders (see EN 13110 or an equivalent standard);
composite LPG cylinders (see EN 14427 or an equivalent standard).
Specific requirements for different types of cylinders are detailed in Annex A, Annex B, Annex C and Annex D.
NOTE Rejection limits for a particular type of protected cylinder are given in Annex G.
This standard is intended to be applied to cylinders complying with RID/ADR (including pi marked cylinders) and also to existing non RID/ADR cylinder populations.
Flüssiggas-Geräte und Ausrüstungsteile - Kontrollverfahren für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG) vor, während und nach dem Füllen
Diese Europäische Norm legt Kontrollverfahren für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas
(LPG) vor, während und nach dem Füllen fest.
Diese Europäische Norm gilt für ortsbewegliche, wiederbefüllbare Flüssiggasflaschen mit einem
Fassungsraum von 0,5 l bis einschließlich 150 l. Diese Europäische Norm gilt nicht für Gasflaschen, die fest in
Fahrzeugen eingebaut sind, oder für Anlagen und Fülleinrichtungen.
Diese Norm gilt für:
- geschweißte und gelötete Flaschen aus Stahl für Flüssiggas (LPG) mit festgelegter Mindest-Wanddicke
(siehe EN 1442 und EN 12807 oder gleichwertige Norm);
- geschweißte Flaschen aus Stahl für Flüssiggas (LPG) ohne festgelegte Mindest-Wanddicke (siehe
EN 14140 oder gleichwertige Norm);
- geschweißte Flaschen aus Aluminium für Flüssiggas (LPG) (siehe EN 13110 oder gleichwertige Norm);
- Flüssiggasflaschen aus Verbundwerkstoff (siehe EN 14427 oder gleichwertige Norm).
Spezifische Anforderungen für verschiedene Flaschentypen sind in den Anhängen A, B, C und D beschrieben.
ANMERKUNG Zurückweisungskriterien für einen bestimmten Flaschentyp sind in Anhang G angegeben.
Diese Norm ist für Flaschen vorgesehen, die RID/ADR entsprechen (einschließlich Flaschen mit Pi-
Kennzeichnung), sowie für bestehende Flaschengruppen, die nicht mit RID/ADR übereinstimmen.
Equipements pour GPL et leurs accessoires - Procédure de vérification des bouteilles transportables et rechargeables pour GPL avant, pendant et après le remplissage
La présente Norme européenne décrit les procédures à employer lors de la vérification des bouteilles pour GPL transportables et rechargeables, avant, pendant et après le remplissage.
La présente Norme européenne s’applique aux bouteilles pour GPL transportables et rechargeables d’une capacité en eau de 0,5 l à 150 l inclus. La présente Norme européenne ne s'applique ni aux bouteilles installées en permanence dans des véhicules, ni aux centres emplisseurs et ni à leurs équipements.
La présente norme s’applique aux éléments suivants :
- bouteilles pour GPL, en acier soudé et brasé, avec une épaisseur minimale de paroi définie (voir EN 1442 et EN 12807 ou une norme équivalente) ;
- bouteilles pour GPL, en acier soudé, sans épaisseur minimale de paroi définie (voir EN 14140 ou une norme équivalente) ;
- bouteilles pour GPL, en aluminium soudé (voir EN 13110 ou une norme équivalente) ;
- bouteilles pour GPL en matériau composite (voir EN 14427 ou une norme équivalente).
Les exigences spécifiques relatives aux différents types de bouteilles sont décrites en détail dans les Annexes A, B, C et D.
NOTE Les limites de rejet d’un type particulier de bouteille protégée sont spécifiées dans l’Annexe G.
La présente norme est destinée à être appliquée aux bouteilles conformes aux RID/ADR (y compris les bouteilles comportant un marquage pi), ainsi qu’aux familles de bouteilles existantes non conformes aux RID/ADR.
Oprema in pribor za utekočinjeni naftni plin (UNP) - Postopek za preverjanje jeklenk za UNP pred polnjenjem, med njim in po njem
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LPG equipment and accessories - Procedure for checking LPG cylinders before, during and after fillingSUHYHUMDQMHEquipements pour GPL et leurs accessoires - Procédure de vérification des bouteilles transportables et rechargeables pour GPL avant, pendant et après le remplissageFlüssiggas-Geräte und Ausrüstungsteile - Kontrollverfahren für ortsbewegliche, wiederbefüllbare Flaschen für Flüssiggas (LPG) vor, während und nach dem FüllenTa slovenski standard je istoveten z:EN 1439:2008SIST EN 1439:2008en,fr,de23.020.30ICS:SIST EN 14794:2006SIST EN 14913:2006SIST EN 1439:2006SIST EN 14763:20051DGRPHãþDSLOVENSKI
STANDARDSIST EN 1439:200801-maj-2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1439February 2008ICS 23.020.30Supersedes EN 1439:2005, EN 14763:2005, EN14794:2005, EN 14913:2005
English VersionLPG equipment and accessories - Procedure for checking LPGcylinders before, during and after fillingEquipements pour GPL et leurs accessoires - Procédure devérification des bouteilles transportables et rechargeablespour GPL avant, pendant et après le remplissageFlüssiggas-Geräte und Ausrüstungsteile - Kontrollverfahrenfür ortsbewegliche, wiederbefüllbare Flaschen fürFlüssiggas (LPG) vor, während und nach dem FüllenThis European Standard was approved by CEN on 6 January 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1439:2008: E
EN 1439:2008 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Segregation of cylinders prior to filling.7 4.1 General.7 4.2 Cylinders suitable for filling.7 4.3 Cylinders for periodic inspection.8 4.4 Cylinders requiring further assessment.8 5 Reassessment of cylinders.8 6 Filling conditions.8 6.1 Safe filling quantity.8 6.2 Safe filling mixture and quality.8 6.3 Accuracy of filling equipment.9 6.4 Filling methods.9 7 Post filling checks.9 7.1 Check of filled amount.9 7.2 Action necessary for over / under-filled cylinders.9 7.3 Final checks.9 Annex A (normative)
Specific requirements for welded and brazed steel LPG cylinders.10 Annex B (normative)
Specific requirements for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard.12 B.1 General.12 B.2 Procedure for establishing rejection criteria carbon steel cylinders.12 B.3 Rejection criteria for stainless steel cylinders.14 Annex C (normative)
Specific requirements for welded aluminium LPG cylinders.17 Annex D (normative)
Specific requirements for composite LPG cylinders.19 D.1 Establishment of rejection criteria.19 D.1.1 General.19 D.1.2 Procedure.19 D.2 Examples of rejection criteria.20 Annex E (normative)
Safe filling conditions.26 Annex F (informative)
Flow diagram of the checks before, during and after filling.27 Annex G (informative)
Inspection procedure for a particular design of protected cylinder.28 G.1 Scope and cylinder description.28 G.2 Cylinders suitable for filling.28 G.3 Cylinders for periodic inspection.28 G.4 Cylinders requiring further assessment.28 G.5 Reassessment of cylinders.28 Bibliography.31
EN 1439:2008 (E) 3 Foreword This document (EN 1439:2008) has been prepared by Technical Committee CEN/TC 286 “Liquefied petroleum gas equipment and accessories”, the secretariat of which is held by NSAI. 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 2008, and conflicting national standards shall be withdrawn at the latest by August 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This European Standard has been submitted for reference into the RID (Regulations concerning the International Carriage of Dangerous Goods by Rail) and/or in the technical annexes of the ADR (European Agreement concerning the international carriage of Dangerous goods by Road).
Therefore the standards listed in the normative references and covering basic requirements of the RID/ADR not addressed within the present standard are normative only when the standards themselves are referred to in the RID and/or in the technical annexes of the ADR. The main changes between this version of the standard and the 2005 version is that this version combines EN 1439:2005, EN 14763:2005, EN 14794:2005 and EN 14913:2005 into a single standard. This European Standard supersedes EN 1439:2005, EN 14763:2005, EN 14794:2005 and EN 14913:2005. 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, 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 the United Kingdom.
EN 1439:2008 (E) 4 Introduction This European Standard calls for the use of substances and procedures that can be injurious to health if adequate precautions are not taken. It refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage. 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. Where judgements are called for, it has been assumed that they are made by competent persons who have been trained specifically for the tasks. This standard is a combination of EN 1439:2005, with EN 14763:2005, EN 14794:2005 and EN 14913:2005.
EN 1439:2008 (E) 5 1 Scope This European Standard specifies the procedures to be adopted when checking transportable refillable LPG cylinders before, during and after filling. This European Standard applies to transportable refillable LPG cylinders of water capacity from 0,5 l up to and including 150 l. This European Standard does not apply to cylinders permanently installed in vehicles, or to plant and filling equipment. This standard is applicable to the following: welded and brazed steel LPG cylinders with a specified minimum wall thickness (see EN 1442 and EN 12807 or an equivalent standard); welded steel LPG cylinders without specified minimum wall thickness (see EN 14140 or an equivalent standard); welded aluminium LPG cylinders (see EN 13110 or an equivalent standard); composite LPG cylinders (see EN 14427 or an equivalent standard). Specific requirements for different types of cylinders are detailed in Annex A, Annex B, Annex C and Annex D. NOTE Rejection limits for a particular type of protected cylinder are given in Annex G. This standard is intended to be applied to cylinders complying with RID/ADR (including pi marked cylinders) and also to existing non RID/ADR cylinder populations. 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 1440, LPG equipment and accessories – Periodic inspection of transportable refillable LPG cylinders
EN 10028-7, Flat products made of steels for pressure purposes — Part 7: Stainless steels EN 12816, Transportable refillable steel and aluminium LPG cylinders – Disposal EN 13952, LPG cylinders - Filling procedures EN 14140, Transportable refillable welded steel cylinders for Liquefied Petroleum Gas (LPG) — Alternative design and construction EN 14427:2004, Transportable refillable fully wrapped composite cylinders for Liquefied Petroleum Gases (LPG) - Design and Construction EN 14894, LPG Equipment and accessories - Cylinder and drum marking
EN 1439:2008 (E) 6 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 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. 3.2 competent person person who by a combination of training, experience and supervision, is able to make objective judgements on the subject 3.3 competent body person or corporate body defined by the national authority, which by combination of appropriate qualification, training, experience and resources is able to make objective judgements on the subject 3.4 cylinder transportable, refillable pressure receptacle with a water capacity from 0,5 l up to and including 150 l 3.5 protected cylinder metallic cylinder fully covered with a protection against impact and external corrosion so that the cylinder wall cannot be seen
NOTE
This is not a composite cylinder; see EN 14427 and Figure G.1 3.6 casing permanently attached sleeve covering part of or the whole of the pressure containing envelope of a composite cylinder, usually incorporating a foot ring and a shroud NOTE Permanently attached means that casing cannot be removed during service without destruction, or by using special tools. 3.7 filling ratio ratio of the mass of gas introduced into a cylinder to the mass of water at 15 °C that would fill the same cylinder fitted ready for use NOTE See Annex E for filling ratios. 3.8 reference temperature temperature used for the calculation of safe filling quantity NOTE See Annex E for reference temperatures. 3.9 filled to a level filled to a fixed level using a fixed liquid level device
EN 1439:2008 (E) 7 3.10 filled by volume filled with a fixed volume of LPG 3.11 filled by mass filled with LPG using a weighing machine 3.12 filling plant
establishment where filling and checking of LPG cylinders takes place 3.13 reconditioning major repairs to cylinders, which can include hot work, welding or de-denting carried out by specialists away from potential sources of flammable air/gas mixture 3.14 periodic inspection activities carried out at defined intervals, such as examining, measuring, testing or gauging the characteristics of a cylinder, comparing these with specified requirements as defined in EN 1440 and marking to attest conformity 3.15 tare mass sum of the mass of the empty cylinder, the mass of the valve including a dip tube where fitted, and the mass of all other parts that are permanently attached to the cylinder when it is being filled, e.g. fixed valve guard 4 Segregation of cylinders prior to filling 4.1 General Cylinders shall be checked and segregated into the categories specified in 4.2 to 4.4. A flow diagram of the checks before, during and after filling is given in Annex F. 4.2 Cylinders suitable for filling The cylinder shall be deemed suitable for filling if the following conditions apply: a) design code/specification is identifiable; b) tare indication and water capacity are known or marked; c) allowed quantity and identification of the product (butane, propane or mixtures thereof, the properties of which were considered for the design of the cylinder) are indicated; d) cylinder is within the test date as determined from the marked manufacture date or periodic inspection date; e) cylinder does not have defects as described in 4.4.
For metallic cylinders, the inspection of the foot-ring for corrosion or damage shall determine the need for a more thorough external visual examination of the cylinder base; f) cylinder is fitted with a pressure relief valve, if required by the manufacturing standard.
EN 1439:2008 (E) 8 4.3 Cylinders for periodic inspection A cylinder shall be set aside for periodic inspection in accordance with EN 1440 when either of the following conditions apply: a) cylinder is out of test date; b) cylinder cannot be confirmed to be within test date. 4.4 Cylinders requiring further assessment A cylinder shall be set aside for further assessment (see Clause 5), if: a) tare indication of a cylinder, filled by mass, is not known or illegible; b) cylinder is judged to have unacceptable physical damage, corrosion or other defects; NOTE Defects and rejection limits are described in Annex A, Annex B, Annex C, Annex D and Annex G. c) valve or pressure relief valve (if fitted) is damaged or has been previously identified as leaking. 5 Reassessment of cylinders Cylinders that have been set aside (see 4.4) shall be examined by a competent person who shall decide whether they are suitable for filling or shall be sent for reconditioning where permitted by the appropriate annex or disposal in accordance with EN 12816 (where applicable). Cylinders that are intended to be filled by mass and where the indication of tare weight is missing or illegible shall be reassessed and have the indication of the tare weight applied in accordance with EN 14894. Leaking cylinders and cylinders with damaged or leaking valves shall be safely vented.
Cylinders leaking through the body shall be disposed of in accordance with EN 12816 (where applicable).
Leaking or damaged valves shall be repaired or replaced. Valves can be removed and refitted safely from and to a pressurized LPG cylinder, provided the facility includes dedicated equipment.
This equipment shall be operated only by competent personnel working in accordance with a written procedure. Rejection limits for physical, material and other defects on the cylinder shell are given in Annex A, Annex B, Annex C and Annex D. NOTE Rejection limits for a particular type of protected cylinder are given in Annex G 6 Filling conditions 6.1 Safe filling quantity Cylinders shall not be filled in excess of the safe filling quantity.
The safe filling quantity is determined from the safe filling ratio agreed by the relevant national competent authorities in accordance with Annex E.
6.2 Safe filling mixture and quality Cylinders shall be filled with the appropriate mixture and quality of LPG, as specified in EN 13952.
EN 1439:2008 (E) 9 6.3 Accuracy of filling equipment Filling equipment and check scales, shall be checked at least once per working day. 6.4 Filling methods Organisation of the filling plant and filling procedure shall be in accordance with EN 13952.
When cylinders are filled to a level, the fixed liquid level device shall be checked for operability.
7 Post filling checks 7.1 Check of filled amount Each cylinder shall be checked to ensure that the maximum mass has not been exceeded, either by check weighing within the tolerances as determined by the relevant national competent authorities or by a determination of the ullage space remaining.
Where accepted by the relevant national competent authorities, other systems of checking, such as sample weighing or statistical-data application, may be used when the filling mass is controlled automatically. 7.2 Action necessary for over / under-filled cylinders If the cylinder is over-filled, the excess LPG shall be removed as soon as reasonably practical and the cylinder re-checked. If the cylinder is under-filled, the appropriate amount of LPG shall be added and the cylinder re-checked. 7.3 Final checks Cylinders, valves and valve seals shall be checked for leakage.
Leaks shall be dealt with in accordance with the procedures in Clause 5. Cylinders shall be checked prior to despatch or storage, for the correct fitting of valve caps or plugs, valve protection caps/guards and labelling if required.
EN 1439:2008 (E) 10 Annex A (normative)
Specific requirements for welded and brazed steel LPG cylinders Rejection limits for physical, material and other defects on the cylinder shell are given in Table A.1, Table A.2 and Table A.3.
Table A.1 — Physical defects in the cylinder wall Defect Description Rejection limit Bulge Visible swelling of the cylinder All
Dent A depression in the cylinder that has neither penetrated nor removed metal, when its width at any point is greater than 2 % of the external cylinder diameter. When the depth of the dent exceeds 25 % of its width at any point a. Cut or gouge A sharp impression where metal has been removed or redistributed. Where the original calculated wall thickness is known:
depth of cut or gouge is such that the
undamaged (remaining) wall is less than the
minimum calculated wall thickness. Where the original calculated wall thickness is not known:
all. Dent containing cut or gouge A depression in the cylinder within which there is a cut or gouge. When the size of the dent or cut or gouge exceeds the dimensions for rejection as an individual defect. Crack A split or rift in the cylinder shell. All Lamination Layering of the material within the cylinder wall appearing as a discontinuity, crack, lap or bulge at the surface. All a Appearance (e.g. sharp dent) and location (e.g. on shoulder of the cylinder) also play a part in the evaluation of dent severity.
EN 1439:2008 (E) 11 Table A.2 — Corrosion on the cylinder wall Type of corrosion Description Rejection limit Isolated corrosion pits A pitting of metal occurring in isolated areas at a concentration not greater than 1 pit per 500 mm2 of surface area. When the depth of discrete pits exceeds 0,6 mm (a greater depth of corrosion can be accepted provided that depth of corrosion does not reduce the wall thickness below the minimum calculated wall thickness). Area corrosion Reduction in wall thickness over an area not exceeding 20 % of the cylinder surface. When the depth of penetration of any pit exceeds 0,4 mm (a greater depth can be accepted provided that the depth of corrosion does not reduce the wall thickness below the minimum calculated wall thickness). General corrosion A reduction in wall thickness over an area exceeding 20 % of the cylinder surface. When the depth of penetration of any pit exceeds 0,2 mm.
A greater depth can be accepted providing that the depth of corrosion does not reduce the wall thickness below the minimum calculated wall thickness. Chain pitting or line or channel corrosion A series of pits or corroded cavities of limited width along the length or around the cylinder circumference. 1) When the total length of corrosion in any direction exceeds 50 % of the circumference of the cylinder; or 2) When the depth of penetration exceeds 0,4 mm. A greater depth can be accepted providing that the depth of corrosion does not reduce the wall thickness below the minimum calculated wall thickness; or
3) When the depth of corrosion cannot be measured. Crevice corrosion Crevice corrosion occurs in the area of the intersection of the foot-ring or shroud with the cylinder. When the depth of penetration exceeds 0,4 mm or when the depth of corrosion cannot be measured. Table A.3 — Other defects
Defect Description Rejection limit Depressed bung Damage to the bung which has altered the profile of the cylinder. A limited level of depression/alignment deviation, as agreed by the competent body. Otherwise, all Arc or torch burns Burning of the cylinder base metal, a hardened heat affected zone, the addition of extraneous weld metal, or the removal of metal by scarfing or cratering. All Fire damage a Excessive general or localized heating of a cylinder usually indicated by: – charring or burning of paint; – fire damage of the metal; – distortion of the cylinder; – melting of metallic valve parts; – melting of any plastic components, e.g. date ring, plug or cap. All Not firmly attached foot-ring.
All Damaged foot-ring Badly deformed foot-ring. unstable or unbalanced cylinder Damaged shroud Loose or badly deformed shroud. Preventing proper operation or protection of valve. a If paint is only superficially charred, a cylinder may be accepted by a competent person.
EN 1439:2008 (E) 12 Annex B (normative)
Specific requirements for welded steel LPG cylinders in accordance with EN 14140 or equivalent standard
B.1 General The owner of the cylinder (or their authorized representative) shall provide the testing station with rejection criteria for the physical and material defects and heat damage to the cylinder. The rejection/ acceptance criteria will be established at the time of the type approval. These criteria will be established by the manufacturer, taking into account the design conditions of the cylinder (e.g. wall thickness, material). See EN 14140. The descriptions for defects on carbon steel cylinders are shown in Table B.1, Table B.2 and Table B.3.
The completed tables for stainless steel cylinders are shown in Table B.4, Table B.5 and Table B.6. B.2 Procedure for establishing rejection criteria carbon steel cylinders The rejection criteria for the defects described in Table B.1, Table B.2 and Table B.3 shall be established in accordance with the following procedure for each design of cylinder as defined in EN 14140: for each defect, four cylinders with the same defect shall be tested.
The size of this defect is recorded.
If the defects of the cylinders are different sizes, the size of the smaller defect shall be recorded; two cylinders shall be submitted to the burst test as described in EN 14140 and two cylinders shall be submitted to the fatigue test as described in EN 14140; if the cylinders pass the tests, the defect is acceptable.
The rejection limit can then be defined by the size of that defect; when all rejection criteria have been established for a design of cylinder as defined in EN 14140, Table B.1, Table B.2 and Table B.3 shall be completed by the owner/manufacturer of the cylinder.
EN 1439:2008 (E) 13 Table B.1 — Physical defects in the cylinder wall Defects Description Rejection limit Bulge Visible swelling of the cylinder All Dent A depression in the cylinder that has neither penetrated nor removed metal, and its width at any point is greater than 2 % of the external cylinder diameter. See clause B.2 a Cut or gouge A sharp impression where metal has been removed or redistributed. See clause B.2 Intersecting cut or gouge The point of intersection of two or more cuts or gouges. All Dent containing cut or gouge A depression in the cylinder within which there is a cut or gouge. When the size of the dent or cut or gouge exceeds the dimensions for rejection as an individual defect. Crack A split or rift in the cylinder shell. All Lamination Layering of the material within the cylinder wall appearing as a discontinuity, crack, lap or bulge at the surface. All a
Appearance (e.g. sharp dent) and location (e.g. on shoulder of the cylinder) also play a part in the evaluation of dent severity.
Table B.2 — Corrosion on the cylinder wall Defects Description Rejection limit Isolated corrosion pits A pitting of metal occurring in isolated areas at a concentration not greater than 1 pit per 500 mm2 of surface area. See clause B.2 Area corrosion Reduction in wall thickness over an area not exceeding 20 % of the cylinder surface. See clause B.2 General corrosion A reduction in wall thickness over an area exceeding 20 % of the cylinder surface. See clause B.2 Chain pitting or line or channel corrosion A series of pits or corroded cavities of limited width along the length or around the cylinder circumference. See clause B.2 Crevice corrosion Crevice corrosion occurs in the area of the intersection of the foot ring or shroud with the cylinder. See clause B.2
EN 1439:2008 (E) 14 Table B.3 — Other defects Defects Description Rejection limit Depressed bung Damage to the bung which has altered the profile of the cylinder. All or a limited level of depression/alignment deviation as agreed with the competent body.
Arc or torch burns Burning of the cylinder base metal, a hardened heat affected zone, the addition of extraneous weld metal, or the removal of metal by scarfing or cratering. All Fire damage a Excessive general or localized heating of a cylinder usually indicated by: – charring or burning of paint; – fire damage of the metal; – distortion of the cylinder; – melting of metallic valve parts; – melting of any plastic components, e.g. date ring, plug or cap. All Damage of handle if fitted Excessive deforming of the handle If there is a risk of an injury e.g. finger cut
Not firmly attached foot-ring
All Damaged foot-ring Badly deformed foot-ring unstable or unbalanced cylinder Damaged shroud Loose or badly deformed shroud Preventing proper operation or protection of valve a
If paint is only superficially charred, a cyli
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