Strojírenství

Oblast zaměření: Zařízení pro naftový průmysl
Komise : CEN/TC 12 (Materials, equipment and offshore structures for petroleum and natural gas industries)
Původce: CEN
K připomínkám do: 11.12.2020
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This document defines requirements for the fabrication, welding, inspection, examination and testing of new, metallic piping systems up to 69 000 kPa (ga) maximum, within temperature range limits for the materials meeting the requirements of ASME B31.3:2018, on fixed and floating offshore production facilities and onshore production, processing and gas liquefaction plants.

This document is applicable to all pressure retaining components and any non-pressure retaining component, such as a pipe support, welded directly to a pressure retaining component.

This document is not applicable to:

—    marine-related piping systems, e.g. ballasting piping systems, systems covered by classification societies;

—    metallic tubing with a maximum wall thickness of 6,0 mm and internal diameter of 50,8 mm, used for subsea umbilical systems;

NOTE 1   Reference can be made to ISO 13628-5 or API Spec 17E for welding and examination of these components.

—    piping systems with corrosion resistant cladding (either integrally clad or mechanically lined) or weld overlay, including buttering and associated dissimilar welds;

NOTE 2   Reference can be made to DNVGL-RP-B204 for welding and examination of these systems.

—    refractory alloys (with exception of CP titanium Grade 1 (UNS R50250) or Grade 2 (UNS R50400));

—    non-metallic piping assemblies;

—    transportation pipeline systems, including flowlines, designed in accordance with a recognized pipeline design code.

Oblast zaměření: Nádoby na plyny
Komise : CEN/TC 286 (Liquefied petroleum gas equipment and accessories)
Původce: CEN
K připomínkám do: 14.12.2020
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This document specifies requirements for the design, manufacture and testing of composite piping for use with LPG in liquid phase and vapour pressure phase.

This document is applicable to LPG composite piping having a maximum allowable pressure of less than or equal to 25 bar.

NOTE          For installation of composite pipework systems see EN 16125.

This document applies to pipes where the first layer of the pipework containment in contact with the LPG is of thermoplastic material which may include some degree of reinforcement.

It does not apply to fibre reinforced thermosets, commonly referred to as glass fibre reinforced plastic (GRP), nor rigid metals or corrugated metal pipework or hoses to EN ISO 10380.

Oblast zaměření: Nádoby na plyny
Komise : CEN/TC 286 (Liquefied petroleum gas equipment and accessories)
Původce: CEN
K připomínkám do: 14.12.2020
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This document

—    specifies minimum requirements for materials, design, construction, prototype testing and routine manufacturing inspections of fully wrapped composite cylinders with a water capacity from 0,5 litre up to and including 150 litres for liquefied petroleum gases (LPG) exposed to ambient temperatures, with a test pressure of at least 30 bar;

—    is only applicable to cylinders which are fitted with a pressure relief valve (see 4.1.3);

—    is applicable to cylinders with a liner of metallic material (welded or seamless) or non-metallic material (or a mixture thereof), reinforced by fibres of glass, carbon or aramid (or a mixture thereof);

—    is also applicable to composite cylinders without liners.

Cylinders manufactured to this document are suitable for temperatures down to −40 °C.

This document does not address the design, fitting and performance of removable protective sleeves. Where these are fitted, the choice of material and sleeve performance should be considered separately.

Oblast zaměření: Čištění plynů
Komise : CEN/TC 195 (Air filters for general air cleaning)
Původce: CEN
K připomínkám do: 18.12.2020
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ISO 29461 specifies methods and procedures for determining the performance of particulate air filters used in air intake filter systems for rotary machinery such as stationary gas turbines, compressors and other stationary internal combustion engines. It applies to air filters with an efficiency of 85 % or more for the MPPS (EPA and HEPA filters) which are tested according to ISO 29463 part 1 to 5 and filters with a lower efficiency which are tested according to ISO 16890 part 1 to 4. The procedures described in both, the ISO 16890 series and the ISO 29463 series, are applied and extended by this part of ISO 29461 to air filters which operate at flow rates within the range 0,24 m3/s (850 m3/h, 500 ft3/min) up to 2,36 m3/s (8500 m3/h, 5000 ft3/min).

This part of ISO 29461 refers to static (barrier) filter systems but can also be applied to other filter types and systems in appropriate circumstances, for example to evaluate the initial efficiency of cleanable and surface loading filters.

The performance results obtained in accordance with this part of ISO 29461 cannot be quantitatively applied (by themselves) to predict performance in service with regard to efficiency and lifetime. Other factors influencing performance to be taken into account are described in the annexes.

Oblast zaměření: Obráběcí stroje
Komise : CEN/TC 143 (Machine tools - Safety)
Původce: CEN
K připomínkám do: 22.12.2020
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This document specifies the technical safety requirements and protective measures for the design, construction and supply (including installation and dismantling, with arrangements for transport and maintenance) of milling machines (see 3.1.1), including machines capable of performing boring operations (see 3.1.2), machining centres and transfer machines designed for continuous production use, which are intended to cut cold metal, and other non-combustible cold materials except for wood or materials with physical characteristics similar to those of wood as defined in ISO 19085‑1, and for glass, stone and engineered/agglomerated materials as defined in EN 14618.

This document covers the following machines:

a)    manually, without numerical control, operated boring and milling machines (see 3.2.1, Group 1), e.g. knee and column type milling machines (see Figures C.1 and C.2);

b)    manually, with limited numerical control, operated boring and milling machines (see 3.2.2, Group 2), e.g. profile and contouring milling machines (see Figures C.3 and C.4);

c)    numerically controlled milling machines and machining centres (see 3.2.3, Group 3), e.g. automatic milling machines and milling centres, e.g. multi-spindle milling machines, gear-milling machines (see Figures C.5, C.6 and C.7);

d)    transfer and special-purpose machines (see 3.2.4, Group 4), which are designed to process only pre-specified workpieces or limited range of similar workpieces by means of a predetermined sequence of machining operations and process parameters (see Figures C.8, C.9, C.10, C.11, C.12 and C.13).

This document also applies to machines fitted with the following devices/facilities whose hazards have been dealt with:

—    tool magazine(s);

—    tool changer(s);

—    workpiece handling mechanism(s);

—    powered workpiece clamping mechanism(s);

—    swarf/chip conveyor(s);

—    power-operated door(s);

—    moveable operator cabin(s);

—    additional equipment for turning;

—    additional equipment for grinding.

When in this document the sole word “machine” or “machines” is being used, it is referred to all above-mentioned groups and types of machines.

This document deals with all significant hazards, hazardous situations and events relevant to this type of machinery which may occur during transportation, assembly and installation, setting, operation, cleaning and maintenance, troubleshooting, dismantling or disabling according to ISO 12100, when the machinery is used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).

This document presumes accessibility to the machine from all directions and specifies access conditions to operator positions. It also applies to workpiece transfer devices including transport devices for loading/unloading when they form an integral part of the machine.

Oblast zaměření: Nezařazeno
Komise : CEN/TC 438 (Additive Manufacturing)
Původce: CEN
K připomínkám do: 28.12.2020
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This standard describes a method for defining requirements for plastic materials used in extrusion based additive manufacturing processes. Materials include unfilled, filled, special additives (e.g. flame retardants, stabilizers, etc.) and reinforced plastic materials suitable for processing into parts.  Processes include all material extrusion based additive manufacturing processes.

This specification is intended for use by manufacturers of materials and/or plastic parts using material extrusion based additive manufacturing. This specification also applies to plastic materials manufacturers providing feedstock to be used in extrusion based additive manufacturing processes.

Komise : CEN/TC 305 (Potentially explosive atmospheres. Explosion prevention and protection)
Původce: CEN
K připomínkám do: 11.01.2021
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This document specifies a test method to determine the explosion limits of gases, vapours and their mixtures, mixed with a gaseous oxidizer or an oxidizer/inert gas mixture at pressures from 1 bar to 100 bar and for temperatures up to 400 °C.