TLP - Pressure vessels

This document specifies requirements for unfired pressure vessels and their parts made of titanium and titanium alloys in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026 to EN 13445-5:2026.
NOTE 1   Cast materials, HIP and additive manufacturing are not included in this version. Details regarding such materials will be subject to an amendment to or a revision of this European Standard.
NOTE 2   Materials in Groups 51.4 and 54 are not included in this version.

This document specifies the requirements for steel products used for unfired pressure vessels.
For some metallic materials other than steel, such as spheroidal graphite cast iron, aluminium, nickel, copper, titanium, requirements are or will be formulated in separate parts of this document.
For metallic materials which are not covered by a harmonized material standard and are not likely to be in near future, specific rules are given in this part or the above cited parts of this document.

This document specifies requirements for unfired pressure vessels and their parts made of aluminium and aluminium alloys in addition to the general requirements for unfired pressure vessels under EN 13445:2026 Parts 1 to 5. This document specifies unfired pressure vessels for loads up to 500 full cycles.
NOTE    Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This Part 10 of this document specifies requirements for unfired pressure vessels and their parts made of nickel and nickel alloys (see 3.1) in addition to the general requirements for unfired pressure vessels under EN 13445-1:2026, EN 13445-2:2026, EN 13445-3:2026, EN 13445-4:2026 and EN 13445-5:2026.
NOTE   Cast materials are not included in this version. Details regarding cast materials will be subject to an amendment to or a revision of this document.

This document specifies requirements for the design, materials, manufacturing and testing of pressure vessels and pressure vessel parts intended for use with a maximum allowable pressure, PS, equal or less than:
-   100 bar when containing gases or liquids in group 1 or 2;
-   1 000 bar when containing liquids in group 2 only
and shell wall thicknesses not exceeding 60 mm, which are constructed of ferritic or austenitic spheroidal graphite cast iron. The thickness limitation of the shell does not apply to thickness of flanges, reinforcements, bosses, etc.
NOTE 1   Austenitic spheroidal graphite cast iron grades are principally used for high and low temperature applications and for their corrosion resistance properties.
NOTE 2   The allowable grades of spheroidal graphite cast iron are listed in Tables 5.1-1 and 5.1-2. Service conditions are given in Clause 4.
This document does not include lamellar graphite cast iron grades for ferritic and austenitic grades, with an elongation after fracture equal or less than 15 % which are explicitly excluded. Requirements for the use of cast irons with an elongation after fracture equal or less than 15 % are given in EN 15776.

This document specifies requirements for the manufacture of unfired pressure vessels and their parts, made of steels, including their connections to non-pressure parts. It specifies requirements for material traceability, manufacturing tolerances, welding requirements, requirements for permanent joints other than welding, production tests, forming requirements, heat treatment, repairs and finishing operations.

This document applies to industrial metallic valves for hydrogen use. It contains recommendations and additional requirements applicable to material selection, design, manufacture, and final assessment.
This document addresses the following four services/damage mechanisms, which might exist in combinations:
—   low temperature applications;
—   hydrogen environmental embrittlement (HEE) or hydrogen-induced cracking (HIC);
—   high temperature hydrogen attack (HTHA);
—   hydrogen service with cyclic loads (fatigue).
This document considers the difference between gaseous hydrogen (GH2) and liquid hydrogen (LH2), where necessary.
The additional provisions set out in this document do not cover corrosion such as electro-chemical corrosion of metals under participation of hydrogen (e.g. sour gas).
This document is based on the requirements contained in the standards specified below:
—   applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment, the applicable provisions of EN 16668 apply;
—   additional requirements for valves in chemical and petrochemical applications are specified in EN 12569;
—   additional requirements for valves in gas distribution systems are specified in EN 13774;
—   additional requirements for valves in gas transportation systems are specified in EN 14141.

This document defines the terms, definitions, quantities, symbols and units that are used throughout the EN 13445 series and gives general information on the design and manufacturing of vessels under this standard.
It also contains instructions on how to use the standard (Annex A) as well as an index which covers the whole standard (Annex B). This information is aimed to aid users of the EN 13445 series.
This document applies to unfired pressure vessels with a maximum allowable pressure greater than 0,5 bar gauge but may be used for vessels operating at lower pressures, including vacuum.
This document is not applicable to pressure vessels of the following types:
- vessels of riveted construction;
- vessels of lamellar cast iron or any other materials not included in Parts 2, 6, or 8 of the standard;
- multilayered, autofrettaged or pre-stressed vessels.
This document can be applied to the following pressure vessels, provided that account is taken of additional and/or alternative requirements resulting from the hazard analysis and from rules or instructions specific for:
- transportable vessels;
- items specifically designed for nuclear use;
- pressure vessels with a risk of overheating.
NOTE EN 14222 covers electrically fired boilers made from stainless steel and can be used as an example of additional requirements for such vessels.
Other European standards apply to industrial piping (EN 13480 series) and to water tube and shell boilers (EN 12952 series and EN 12953 series).

This Part of this document specifies the inspection and testing of individual and serially produced pressure vessels made of steels in accordance with EN 13445-2:2021.
Special provisions for cyclic operation are given in Annex G of this Part.
Special provisions for vessels or vessel parts working in the creep range are given in Annex F and Annex I of this Part.
NOTE   The responsibilities of parties involved in the conformity assessment procedures are given in Directive 2014/68/EU. Guidance on this can be found in CR 13445-7.

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1: 2026 and constructed of steels in accordance with EN 13445-2:2026.
EN 13445-5: 2026, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

This document specifies the minimum requirements for the contents of the user manual for Automotive LPG propulsion systems fitted in road vehicles.
This document does not cover the user manual for forklift trucks or other industrial machinery.

This document specifies the quality characteristics of liquid or gaseous hydrogen fuel dispensed at hydrogen refuelling stations for use in proton exchange membrane (PEM) fuel cell vehicle systems, and the corresponding quality assurance considerations for ensuring uniformity of the hydrogen fuel.

This document specifies procedures for periodic inspection and testing, for transportable refillable LPG cylinders with a water capacity from 0,5 l up to and including 150 l.
This document is applicable to the following:
-   welded steel LPG cylinders manufactured to an alternative design and construction, according to EN 14140 or equivalent standard;
-   welded aluminium LPG cylinders, according to EN 13110 or equivalent standard;
-   composite LPG cylinders, according to EN 14427 or equivalent standard;
-   over-moulded LPG cylinders designed and manufactured according to EN 1442 or EN 14140;
see Annexes E and F.
This document can also be applied to stainless steel LPG cylinders designed according to national codes, see Clause A.3. This document can also be applied to composite LPG cylinders designed according to EN 12245, ISO 11119-3 and ISO 11119-4.
This document does not apply to cylinders permanently installed in vehicles.

This Part of this document specifies requirements for the design of unfired pressure vessels covered by EN 13445-1:2021 and constructed of steels in accordance with EN 13445-2:2021+A1:2023.
EN 13445-5:2021, Annex C specifies requirements for the design of access and inspection openings, closing mechanisms and special locking elements.
NOTE   This Part applies to design of vessels before putting into service. It may be used for in service calculation or analysis subject to appropriate adjustment.

This document specifies the requirements and test methods applicable to factory applied cement mortar coatings for the external corrosion protection of ductile iron pipes conforming to EN 545, EN 598 and EN 969 for use at operating temperatures up to 50 °C.
Coatings according to this document are suitable for soils of all common corrosion loads and trenchless applications.
Special activities on site such as joint protection, tapping, clamping, etc. could affect the corrosion protection properties of the cement mortar coating. These operations are normally covered in the laying instructions supplied by the manufacturers of pipes, clamps, house connection saddles, etc. and any relevant users' procedures. Such instructions are not part of this document.

This document specifies the minimum requirements for the materials, design, construction and workmanship, manufacturing processes, examinations and testing at time of manufacture for refillable, seamless, stainless steel gas cylinders with water capacities up to and including 150 l.
It is applicable to cylinders for compressed, liquefied and dissolved gases with a maximum actual tensile strength, Rma, of less than 1 100 MPa.
NOTE            If so desired, cylinders of water capacity between 150 l and 450 l can be manufactured to be in full conformance to this document.

This document specifies requirements for the attachment of part-turn actuators, with or without gearboxes, to industrial valves.
The attachment of part-turn actuators to control valves in accordance with the requirements of this document is subject to an agreement between the supplier and the purchaser.
This document specifies:
flange dimensions necessary for the attachment of part-turn actuators to industrial valves [see Figures 1 a) and 1 c)] or to intermediate supports [see Figures 1 b) and 1 d)];
driving component dimensions of part-turn actuators necessary to attach them to the driven components;
reference values for torques for interfaces and for couplings having the dimensions specified in this document.
The attachment of the intermediate support to the valve is beyond the scope of this document.

This document specifies basic requirements for gearboxes to operate industrial valves for manual and automated on/off and modulating duties, including manual override gearboxes. It includes guidelines for classification, design and methods for conformity assessment.
This document does not cover gear systems which are an integral part in the design of valves and subsea gearboxes.
Other requirements or conditions of use different from those indicated in this document are agreed between the purchaser and the manufacturer or supplier (first party) prior to order.

This document specifies the requirements for the attachment of multi-turn actuators to valves.
Throughout this document, “actuator” can be understood as “actuator” or “combination of actuator with gearbox” providing a multi-turn or linear output.
This document specifies:
flange dimensions necessary for the attachment of actuators to industrial valves [see Figure 1 a)] or to intermediate supports [see Figure 1 b)];
those driving component dimensions of actuators which are necessary to attach them to the driven components;
reference values for torque and thrust for flanges having the dimensions specified in this document.

This document specifies the requirements for the design, manufacture, identification and testing of battery vehicles and multiple-element gas containers (MEGCs) containing cylinders, tubes, or bundles of cylinders. This document applies also to battery vehicles and MEGCs containing bundles of cylinders connected by a manifold which are dis-assembled from the battery vehicle and filled individually.
It is applicable to battery vehicles and MEGCs containing compressed gas, liquefied gas, and mixtures thereof. It is also applicable to battery vehicles for dissolved acetylene.
This document is not applicable to battery vehicles and MEGC for toxic gases with an LC50 value less than or equal to 200 ml/m3.
This document does not apply to battery vehicles and MEGCs containing pressure drums or tanks.
This document does not specify requirements for the vehicle chassis or motive unit.
This document is primarily intended for industrial gases other than liquefied petroleum gases (LPG).

This document specifies the operational procedures and best practices when checking transportation racks for LPG cylinders before and during loading and unloading prior to the vehicles going on the road and at any break during the journey.
This document applies to racks containing transportable refillable LPG cylinders of water capacity from 0,5 l up to and including 150 l.
This document applies to the following equipment:
-   rack frame/structure;
-   rack closures;
-   rack fixing equipment or accessories on to the vehicle.
This document applies to checks performed:
-   at cylinder filling plants and depots;
-   or at cylinder manufacturing and/or refurbishment facilities;
-   or at any place where racks are used or moved.
This document also provides guidance and examples for rack maintenance and repair procedures, including rejection criteria and for establishing operational procedures. Transportation racks are also called stillages, pallets or racks (see Clause 3).
This document does not cover the design and the manufacturing of racks.
This document does not apply to presentation display racks at points of sale.

This document specifies the requirements for metallic shop fabricated cylindrical vertical steel tanks, single and double skin for the aboveground storage of water polluting liquids (both flammable and non-flammable) within the following limits:
—   from Ø 1250 mm up to Ø 4 000 mm inner tank nominal diameter, and
—   up to maximum overall shell length of 6 times the nominal inner tank diameter (or max 14 m shell lenght Lz), and
—   tank possible to be divided from 1 to 5 compartments,
—   for liquids with maximum density of up to 1,9 kg/l, and
—   with an operating pressure (P0) of maximum 50kPa (0,5 bar (g)) and minimum – 5 kPa (- 50 mbar (g)), and
—   where double skin tanks with vacuum leak detection system are used the kinematic viscosity of the stored media shall not exceed 5 × 10−3 m2/s.
This document is applicable for normal ambient temperature conditions (−40 °C to + 50 °C). Where temperatures are outside this range, additional requirements need to be taken into account.
This document is not applicable to tanks used for storage and/or supply of fuel/gas for building heating/cooling systems, and of hot or cold water not intended for human consumption, nor to loads and special measures necessary in areas subject to risk of earthquakes.
This document is not applicable for the storage of liquids having dangerous goods classes listed in Table 1 because of the special dangers involved.
Table 1 - List of dangerous goods which are not covered by this document
UN-classification   Type of dangerous goods
Class 1   Explosives
Class 4.2   Substances liable to spontaneous combustion
Class 4.3   Substances which in contact with water emit flammable gases
Class 5.2   Organic peroxides
Class 6.2   Infectious substances
Class 7   Radioactive substances, hydrocyanic or hydrocyanic solvent liquids, metal carbons, hydrofluoric acid, bromide liquids
NOTE   The classifications referred to are those adopted by the United Nations Committee of Experts on the Transport of Dangerous Goods (not to be interpreted as tank classes described in 6.2).

This document specifies the minimum requirements for inspection at time of filling of battery vehicles and multiple-element gas containers (MEGCs) for compressed and liquefied gases.
The elements of battery vehicles and MEGCs covered by this document are:
—   seamless steel or seamless aluminium alloy cylinders or tubes, and
—   composite cylinders or tubes (hoop-wrapped or fully-wrapped)
with a water capacity up to 3000 l.
This document is not applicable to MEGCs using tanks as elements.
This document is not applicable to the automotive components of a battery trailer.
NOTE   Acetylene battery-vehicles are covered by EN 13720 [1].

This document specifies the minimum requirements for the design, manufacture and testing of centrifugal pumps for cryogenic service.
This document does not apply to reciprocating pumps.
This document also gives guidance on the design of installations.
It does not specify requirements for operation or maintenance.
NOTE            For general requirements for materials used in cryogenic fluid service, see ISO 21029-1, ISO 20421-1 or ISO 21009-1.

This European Standard specifies the following materials for the pressure bearing parts of shell boilers and equipment of shell boilers (e.g. valves), subjected to internal and external pressure including integral attachments (non pressure bearing parts):
—   flat products (plate) and parts formed from flat products (e.g. shell, furnace, dished ends);
—   tubes and parts formed from tubes (e.g. bending, elbows, reducers, fittings);
—   forgings and cast products ;
—   bolting materials;
—   welding consumables.

This document applies to shell boilers with volumes in excess of 2 l for the generation of steam and/or hot water at a maximum allowable pressure greater than 0,5 bar and with a temperature in excess of 110 °C.
For the purpose of this document the following pressurized parts are included:
—   the shell boiler as one entity of pressure equipment including all the pressure parts from the feedwater/hot water inlet (including the inlet valve) up to and including the steam/hot water outlet (including the outlet valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header);
—   all superheaters, economizers and interconnecting piping;
—   additionally, the piping that is connected to the boiler involved in services such as draining, venting, desuperheating, etc., up to the first isolating valve or, if there is no valve, the first circumferential weld or flange downstream of the shell boiler or if applicable the outlet header/piping.
This document does not apply to the following types of boilers and equipments:
a)   water-tube boilers;
b)   non stationary boilers, e.g. locomotive boilers;
c)   thermal oil boilers;
d)   boilers where the main pressure housing is made of cast material;
e)   pumps, gaskets, etc;
f)   brickwork setting and insulation, etc.
NOTE 1   Further information on shell boilers is given in Annex A.
NOTE 2   Stainless steel boilers are covered by EN 14222:2021.

This document specifies equipment and accessories for road tankers used for the transport of Liquefied Petroleum Gas (LPG) and identifies the equipment that is considered necessary to ensure that filling, transportation and discharge operations can be carried out safely. It specifies the requirements for the assembly of the accessories and the vehicle LPG equipment to the road tanker. This document also identifies additional equipment and accessories that can be used on road tankers carrying LPG.
This document does not preclude the use of alternative designs, materials and equipment testing which provide the same or a higher level of safety. ADR [9] requires that such alternative technical codes be recognized by the competent authority, provided that the minimum requirements of section 6.8.2 of ADR [9] are complied with.
This document does not apply to “tank-containers” or “battery-vehicles” used for the transport of LPG.

This document is applicable to the design and manufacture of site built, vertical, cylindrical, flat-bottomed tank systems for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and –196°C. It specifies the requirements for testing, drying, purging, cool-down and decommissioning of refrigerated liquefied gas storage tank systems.
The tank systems covered by this document are used to store large volumes of hydrocarbon products, ammonia and other non-hydrocarbon gases with low temperature boiling points, generally called “Refrigerated Liquefied Gases” (RLGs). Typical products stored in the tank systems are: methane, ethane, propane, butane, ethylene, propylene, butadiene (this range includes Liquefied Natural Gas (LNG) and Liquefied Petroleum Gas (LPG), ammonia, nitrogen, oxygen and argon.
NOTE Properties of the gases are given in Annex A EN 14620-1:2024.
This document provides requirements and specifies measures to be taken following completion of major tank construction activities and before the tank is brought in to service. It provides requirements for full-height and partial height hydrostatic testing to check the structural integrity of tanks and the capacity of the foundations. Settlement monitoring of the foundations at this stage form the starting point of an annual settlement monitoring programme for the tank foundation. Recommendations are given for marker systems for such monitoring. Requirements for water quality of both fresh water and seawater used during hydrotest, are provided to avoid the risk of corrosion of tanks and appurtenances.
Guidance and requirements for positive and negative pneumatic tests to further check tank structural integrity, leak tightness of welds and the function of pressure and vacuum relief valve systems are also given. Requirements specific to testing of double wall and membrane type tanks is included.
Rules and procedures for commissioning activities, including drying and purging with inert and product gas are provided, including required oxygen concentrations for various RLG’s. The document also provides guidance for cool-down procedures and suggestions for temperature monitoring, including an informative Annex A.
For major maintenance inspection or at the end of the life of the tank, decommissioning will be required. Guidance on safe decommissioning processes is provided.
Suggested procedures for Global testing for membrane tanks are provided in informative Annex B
This document is applicable to the design and manufacture of site built, vertical, cylindrical, flat-bottomed tank systems for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and -196°C.

This document specifies the procedures to be followed when connecting cylinder valves to gas cylinders. It specifically applies to all valve and cylinder combinations connected with ISO screw threads as specified in ISO 11363-1 and ISO 15245-1. It defines procedures and practices for inspection and preparation prior to valving for both taper and parallel screw threads.
Torque values are given in Annex A for steel and aluminium alloy gas cylinders including composite cylinders with steel or aluminium alloy neck boss.
NOTE            The procedures and practices specified in this document can be beneficially applied to other valve to cylinder screw thread connection systems. ISO/TR 11364 lists the valve to gas cylinder threads in use worldwide. It gives details of the thread identification codes, whether the threads are interchangeable with ISO threads and if the taping procedure and torque values specified in this document can be used. ISO/TR 11364 gives clear guidance for the method and torque for all listed inlet threads, which are not interchangeable.

This document specifies requirements, test and assessment methods, marking, labelling and packaging applicable to overfill prevention devices with closure device. The devices are usually composed by:
-   sensor;
-   evaluation device;
-   closure device.
Overfill prevention devices intended to be used in/with underground and/or above ground, non-pressurized, static tanks designed for liquid fuels.
NOTE   Liquid fuel means liquids for internal combustion engines, heating/cooling boilers and generators.

This document specifies the design, safety and operation characteristics of gaseous hydrogen land vehicle (GHLV) refuelling connectors.
GHLV refuelling connectors consist of the following components, as applicable:
—     receptacle and protective cap (mounted on vehicle);
—     nozzle;
—     communication hardware.
This document is applicable to refuelling connectors which have nominal working pressures or hydrogen service levels up to 70 MPa and maximum flow rates up to 120 g/s.
This document is not applicable to refuelling connectors dispensing blends of hydrogen with natural gas.

This document defines terms for the manufacture and use of gas cylinders and other pressure receptacles and their fittings.

This document specifies the requirements for the design, manufacture and testing of cylinders, tubes and other pressure vessels of steel, stainless steel, aluminium alloys or of non-metallic construction material. These are intended for the stationary storage of gaseous hydrogen of up to a maximum water capacity of 10 000 l and a maximum allowable working pressure not exceeding 1 100 bar, of seamless metallic construction (Type 1) or of composite construction (Types 2, 3 and 4), hereafter referred to as pressure vessels.
NOTE   Additional requirements with regard to assemblies (manifolded cylinders and tubes and other pressure vessels) are not covered by this document.
This document is not applicable to Type 2 and 3 vessels with welded liners.
This document is not applicable to pressure vessels used for solid, liquid hydrogen or hybrid cryogenic-high pressure hydrogen storage applications.
This document is not applicable to external piping which can be designed according to recognized standards.

This document specifies the requirements for materials, design and installation of the insulation of refrigerated liquefied gas (RLG) storage tank systems.
RLG storage tank systems store liquefied gas with a low boiling point, i.e. below normal ambient temperature.
The concept of storing such products in liquid form and in non-pressurized tanks therefore depends on the combination of latent heat of vaporization and thermal insulation.
Consequently, thermal insulation for RLG storage tank systems is not an ancillary part of the containment system (as for most ambient atmospheric hydrocarbon tanks) but it is an essential component and the storage tank system cannot operate without a properly designed, installed and maintained insulation system.
The main functions of the insulation in RLG storage tank systems are:
-   to maintain the boil off due to heat in-leak at or below the specified limits;
-   to limit the thermal loading of the outer tank components, so to prevent both their sudden damage and premature ageing (e.g. due to external condensation and ice formation);
-   to prevent damage by frost heave of the foundation/soil beneath the tank base slab (in combination with the slab heating system for tanks resting at grade);
-   to minimize condensation and icing on the outer surfaces of the tank.
A wide range of insulation materials is available. However, the material properties differ greatly amongst the various generically different materials and also within the same generic group of materials.
Therefore, within the scope of this document, only general guidance on selection of materials is given.
NOTE   For general guidance on selection of materials, see Annex A.
This document deals with the design and manufacture of site built, vertical, cylindrical, flat-bottomed tank systems for the storage of refrigerated, liquefied gases with operating temperatures between 0 °C and −196 °C.

This document specifies basic requirements for hydraulic part-turn valve actuators, both double acting and single acting, used for on-off and modulating control duties.
It includes guidelines, recommendations and methods for enclosure and corrosion protection, control and testing.
It does not apply to hydraulic actuators which are integral parts of control valves and to hydraulic actuators designed for permanent immersion in fresh or sea water as well as electro-hydraulic actuators.
Other requirements, or conditions of use, different from those indicated in this document can vary upon request.

This document specifies requirements for underground pipework systems used to transfer liquid fuels and their vapours at petrol filling stations. Minimum performance requirements covering fitness for purpose, safety and environmental protection are given.
This document is applicable to pipework made from thermoplastics, which can include some degree of reinforcement, and to flexible metal pipework. It does not apply to fibre reinforced thermosets, commonly referred to as glass fibre reinforced plastic (GRP), nor to rigid metals.
This document is applicable to:
-   delivery pipes from tanks to dispensers, including positive pressure, vacuum suction and siphon modes;
-   fill pipes from road tankers to tanks;
-   vapour recovery and vent pipework;
-   pipework for secondary containment;
-   fittings.
It does not apply to pipework for use with liquefied petroleum gas.

This document provides requirements for metallic mounting kits for part-turn valves and actuator attachments.
It includes all components transmitting torques from actuators to valves with a maximum flange torque up to 16 000 Nm (up to F30 flange type).
It applies to mounting kits for part-turn valves and actuators with integral attachment flanges and drive components as described in ISO 5211, when direct mounting of the actuator on valve is not practical.
Stacking of mounting kits/intermediate supports is not within the scope of this document.
This document specifies methods for design and environmental corrosion protection.
When a reference is made to this document, all the requirements apply, unless otherwise agreed between the purchaser and the manufacturer/supplier, prior to order.
In this document, the term "valve" covers valve or shaft extension top-flange, and the term “actuator” covers part-turn actuator or combination of multi-turn actuator and gearbox.
Control valves are excluded from this document.

This document gives background information for guidance to be used in conjunction with the calculation method for design rules for gasketed circular flange connections as specified in FprEN 1591-1:2024.
NOTE   References to formulae numbered in this document have a decimal format whilst those in FprEN 1591-1:2024 are indicated by whole numbers.

This document provides information on the environmental aspects of all phases of the life cycle of equipment and accessories produced for the LPG industry and integrates climate change recommendations in standards developed by CEN/TC 286, where applicable. The following are addressed:
a)   design;
b)   manufacture;
c)   packaging;
d)   use and operation;
e)   disposal.

This document specifies the requirements for the reconditioning and retesting of pressure relief valves (PRVs) for LPG pressure vessels covered under the scope of EN 14129.
This document applies to retesting and reconditioning of PRVs that are carried out in a workshop and does not apply to site adjustment of installed PRVs.
Annex A is a normative annex detailing a sampling approach for PRV requalification which could be used in case of on-site requalification of series produced pressure vessels fitted with series produced PRVs.

This document is applicable to metallic valves as pressure accessories for industrial applications with a maximum allowable pressure PS greater than 0,5 bar in accordance with the European legislation for pressure equipment and specifies requirements applicable to design, manufacture, testing, materials and documentation.
All essential safety requirements of the European legislation for pressure equipment applicable to valves have been taken into consideration and are addressed in this document.
This document does not apply to:
-   safety valve and bursting disc (safety accessories),
-   sight glass with its frames (component of a pressure equipment), and
-   measurement chambers.
For other exclusions, refer to the European legislation for pressure equipment [60].

This document specifies requirements for the material, design, inspections, construction and workmanship, manufacturing processes, and tests at manufacture of non-refillable metallic gas cylinders of welded, brazed, or seamless construction. This document also specifies the requirements for the non-refillable sealing devices and their methods of testing. It is applicable to non-refillable metallic gas cylinders for compressed and liquefied gases.
NOTE            The specific gases permitted in cylinders constructed to this document can be limited by national or international requirements.
This document is applicable to cylinders where:
a)       the test pressure does not exceed 250 bar1) (i.e. ph ≤ 250 bar) for liquefied gases and 450 bar for compressed gases; or
b)       the product of the test pressure and the water capacity does not exceed 1 000 bar·litres (i.e. ph V ≤ 1 000 bar l); or
c)        the test pressure exceeds 45 bar and the water capacity does not exceed 5 l (i.e. for ph > 45 bar, then V ≤ 5 l).
1) 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2

This document specifies the minimum requirements for safety related equipment for shell boilers (generator and/or assemblies) as specified in EN 12953-1:2012, to ensure the boiler operates within the allowable limits (pressure, temperature, etc.) and if the limits are exceeded the energy supply is automatically interrupted and locked out, irrespective of the degree of intervention.
NOTE 1    For this document, the term “boiler” is applicable for generator and/or assemblies.
NOTE 2   The maximum time of operation without manual (human) intervention can be specified for each boiler system.
NOTE 3   Annex C gives recommendations of operation and testing of the boiler system with a maximum time of operation without manual (human) intervention of 24 h and 72 h.

This document specifies the design, testing and inspection requirements for pressure relief valve isolating devices, valve manifolds, vent pipes and system assemblies which are, where necessary, used with pressure relief valves for use in static pressure vessels for Liquefied Petroleum Gas (LPG) service.
This document addresses both prototype testing and production testing of isolating devices and PRV manifolds.
Pressure relief valves for LPG pressure vessels are specified in EN 14129:2014.

This document specifies requirements for limiters which are incorporated into safety systems for shell boilers as specified in EN 12953 1:2012.
The design requirements and examination of the limiters are covered in this document.
NOTE   See Annex E for determination of the characteristic data for use in protective circuits with a safety integrity level (SIL) rating. The requirements for limiters with regard to the safety integrity level (SIL), for example, in accordance with EN 61508 are not covered in this document.