EU RO Mutual Recognition Group

General description of the product

Adjustable steel chocks are foundation chocks for rigid seatings of heavy machinery and equipment, which require precise alignment and adjustment. The Technical Requirements apply to metal chocks with adjustable height setting by an internal screw connection combined with the capability of self-levelling, thus called 'Adjustable Steel Chocks'. The material used for the adjustable steel chocks includes non-alloy as well as alloyed steel, including stainless steel.

General description of the product

These technical requirements apply to air compressors of reciprocating and rotary displacement type.

Compressor unit consists of the device for compressing the medium along with its unit internal piping for air medium as well as the necessary system for cooling and lubrication.

General description of the product

These Technical Requirements apply to air pipe closing devices required by the Protocol 1988 relating to the Load Line convention 1966 and its adoptions Load Line convention, 1966 to be fitted with automatic closing devices.

General description of the product

Anti-acid paints intended for protection of the interior of battery storage room against corrosion by electrolyte.

General description of the product

Cable glands are devices designed to permit the entry of a cable, flexible cable or

insulated conductor into an enclosure, and which provides sealing and retention. It may

also provide other functions such as earthing, bonding, insulation, cable guarding, strain

relief or a combination of these.

General description of the product 

Cable Trays and ducts (glass reinforced plastic) used on board ships. 

General description of the product

Metallic cable trays and ducts suitable for marine use.

General description of the product

Fittings are pipelines formed components bends, elbows, tees, plugs, reducers, diameter change transition pieces, adapters, caps etc., and other elements of pipelines, intended for pipelines branching and changing of conveying medium direction.

General description of the product

a) Cable splices shall consist of a conductor connector, replacement insulation, replacement cable sheath, and where applicable, replacement of armour and shielding;

b) Heat-shrinkable tubing shall mean tubing that will reduce in diameter from an expanded size to a predetermined size by the application of heat.

General description of the product

Paints or paint systems intended for the corrosion protection of steel structures.

General description of the product

Heating cables for electrical resistance trace heating systems.

General description of the product

Devices intended for heating of accommodations, for habitability purposes.

These devices are typically known as space heaters.

Water heaters, oil heaters, heating batteries for ventilation systems and space heaters

combined with air condition cabinets assumed not to a part of this document.

General description of the product

Electrical insulation mats are made of elastomer for use as a floor covering for the electrical protection of ship crew.

General description of the product

a) Expansion joints made of composite construction, utilizing metallic material (e.g. steel, stainless steel, or equivalent material wire braid) with rubberized/elastomeric coatings inside and/or outside or similar arrangements;

b) External fire-resistant sleeves may be accepted, if needed, to ensure fireresistant characteristics;

c) Full-metal bellow-type expansion joints are covered by a different set of Rules and therefore cannot be considered within this specific technical requirement.

Insulation monitoring devices (IMD) permanently monitor the insulation resistance to earth of unearthed IT systems.

Types of IMDs

a) Type AC IMD for pure a.c. IT systems,

b) Type AC /DC IMD for a.c. and d.c. systems,

c) Type DC IMD only for pure d.c. IT systems,

General description of the product

These technical requirements apply to rigid polyurethane foam panels used to insulate refrigerated provision chambers. Panels can be of the built-up (fabricated in place) or composite design.

General description of the product

This Technical Requirement provides MR type approval requirements for static power

inverters, that is power electronic devices that change direct current (DC) to alternating

current (AC) at specified voltage and frequency.

General description of the product

a) Empty enclosure - enclosures intended for support and installation of electrical equipment, whose internal space provides suitable protection against external influences, as well as a specified degree of protection against approach to or contact with live parts and against contact with moving parts;

b) Empty box - enclosures, generally of small dimensions and, in principle, intended to be mounted on a vertical plane.

General description of the product

a) This technical requirement applies to three-phase power transformers rated at greater than 5 kVA and single phase power transformers rated at greater than 1 kVA (including auto-transformers), up to a power limit of 50k VA **(50k VA when single phase)**;

b) This technical requirement does not apply to special transformers as per IEC 60076 -1;

c) This technical requirement does not apply to the special transformers intended for Ice Breakers and ships with an ice class, on high-speed crafts, on ships with nuclear power plant and on other special objects with more severe environmental conditions or where raised reliability of the equipment is required.

General description of the product

a) These Technical Requirements apply to mechanical joints, so called slip type or grip type or machine grooved type, both for fire resistant and non-fire resistant type;

b) “Mechanical Joints" means devices intended for direct connection of pipe lengths other than by welding, flanges or threaded joints.

General description of the product

Glass fiber reinforced plastic (GRP) gratings for use on board vessels and intended for personnel walkways, catwalks, grids used for detachable steps in stairs, ladders, platforms and access areas. Generally used in lieu of steel grids because of their light weight, low thermal conductivity and resistance to corrosion.

General description of the product and definitions

a) Plastic(s) means both thermoplastic and thermosetting plastic materials with or without reinforcement, such as PVC and FRP (fiber reinforced plastics);

b) Plastic includes synthetic rubber and materials of similar thermo/mechanical properties;

c) Pipes/piping systems means those made of plastic and include the pipes, fittings, joints, and any internal or external liners, coverings and coatings required to comply with the performance criteria. Fittings include bends, elbows, fabricated branch pieces, etc. made of plastic materials;

d) Joint means joining pipes by adhesive bonding, laminating, welding, etc.;

e) Fittings include bends, elbows, fabricated branch pieces, etc. made of plastic materials;

f) Nominal pressure is the maximum permissible working pressure which shall be determined in accordance with 2.a.i.1.2 below;

g) Design pressure is the maximum working pressure which is expected under operation conditions or the highest set pressure of any safety valve or pressure relief device on the system, if fitted;

h) Fire endurance is the capability of the piping system to perform its intended function, i.e. maintain its strength and integrity, for some predicted period of time while exposed to fire.

General description of the product

A pneumatic actuator for valves is a component which directly converts air pressure into mechanical action, opening and closing the operated valve.

General description of the product

A power supply unit (PSU) converts mains AC or DC power for supplying, for instance,

process control, automation, instrumentation or communication systems. Conversion

may be AC/DC, AC/AC, DC/AC or DC/DC using switched-mode power supplies.

General description of the product

Pressure relief valve in class III piping system as defined by IACS UR P2.2 Rev.4 intended to the valves in class III pipelines systems which automatically, without the assistance of any energy other than that of the fluid concerned, discharges a quantity of the fluid so as to prevent a settled safe pressure being exceeded, and which is designed to re-close and prevent further flow of fluid after normal pressure conditions of service have been restored.

General description of the product

A resilient mounting is an item designed to incorporate rigid members for attachment

and resilient elements for the purpose of isolating shock, noise, and vibrations of a

continuous or intermittent origin and to serve as a foundation support for an item of

equipment to be isolated. 

General description of the product

Mixture of resins (usually epoxy resin) and specific additives, mainly characterized by high values of mechanical properties, with particular regard to compression module, resistance to water and oils, and stability over time.

General description of the product

a) Solenoid valve assembly is a type of directional remote control valve which is controlled by an electric solenoid. It is composed of a solenoid component and actuator of valve, intended for controlling medium conveying on-off or changing of conveying medium direction in hydraulic fluid system and pneumatic fluid system on board ships;

b) The move of the (pilot) valve core is pushed by the iron core of solenoid, and reset is usually controlled by spring force.

General description of the product

These Technical Requirements apply to devices, commonly known as spark arresters, which prevent the emission of sparks by diesel engines, boilers and equipment containing sources of ignition and which could lead to the ignition of flammable materials.

General description of the product

Strainers are elements of pipelines, intended to remove larger, unwanted suspended

particles that are visible in conveying media, primarily to protect downstream equipment

(like pumps) from damage.

General description of the product

Rotational speed indicator of marine diesel engines, steam and gas turbines, which

indicate revolutions per minute and rotating direction.

a) Mechanical (Centrifugal, Electromagnetic) tachometer

The types by drive system are shown below:

- Direct drive;

- Flexible shaft drive;

- Belt drive;

b) Electric tachometer

The types of revolution detectors by drive system are shown below:

- Non-contact type (Detecting system: Frequency);

- Direct type (Detecting system: Frequency, AC voltage or DC voltage);

- Flexible shaft type (Detecting system: AC voltage).

Generally composed of:

- Non-contact type detector (Revolution detector);

- Signal converter; and

- Receiver.

Or:

- Driving unit;

- Direct type/Flexible shaft type detector (Transmitting device);

- Junction box; and

- Receiver.

General description of the product

These technical requirements apply to thermal insulation of organic foams (hereinafter referred to as 'insulation') used for piping and ventilation ducts penetrating the cargo spaces, mail rooms, baggage rooms and refrigerated compartments of service spaces, as well as for pipe fittings for cold service systems (refrigeration systems and chilled water piping for air-conditioning systems). Insulation can be of the built-up (fabricated in place) or composite design.

General description of the product

Touch screen i.e. a display monitor or a video screen that is also an input device. The touch screens allow monitoring of and input to systems controlling machinery and equipment.

General description of the product

Valves for boiler water systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify water flow in boiler water systems.

General description of the product

Valves for steam systems of Class III piping as defined by IACS UR P2.2 Rev.4, and for non-essential systems, intended to stop or modify steam flow in steam systems.

General description of the product

Valves for bilge systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify bilge water flow.

General description of the product

Valves for cargo systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify a cargo flow.

General description of the product

Valves for freshwater systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify freshwater flow.

General description of the product

Valves for fuel oil systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify fuel oil flow.

General description of the product

Valves for lubrication oil and hydraulic systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify lubrication oil flow.

General description of the product

Valves for sanitary systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify a sanitary flow.

General description of the product

Valves for seawater systems of Class III piping as defined by IACS UR P2.2 Rev.4 intended to stop or modify a seawater flow.

General description of the product

The vertical surface reference system for DP system is a motion sensor, which can

measure the dynamic linear motion and attitude of the ship, and can measure the

acceleration, roll, pitch, yaw, surge, sway and heave during the ship's operation, and has

high accuracy.

General description of the product

Wind sensors (velocity and direction) based on various technologies (e.g. mechanical,

ultrasonic etc).

Note: the wind sensors provide a signal to the system they are installed in. "Gauging"

function is in fact performed by the DP control system, which has not been considered for

MR so far