Section 3 Materials for equipment and components at low temperatures – Winterisation M

3.1 Scope

3.1.1 The following requirements are intended for the materials of equipment and components exposed to the external design air temperature.

3.1.2 The suitability may be demonstrated by one or a combination of a number of ways, including, but not limited to, the following:

Based on these requirements.
Based on international or national Standards.
Technical investigations based on engineering principles.
Service experience at the operating temperature.
Mechanical tests (e.g. Charpy impact tests).

3.1.3 The requirements are not intended for hull structural items or lifting appliances. Hull construction materials are to be in accordance with Ch 1, 2 Materials for hull construction at low temperatures – Winterisation H. Lifting appliances are to be in accordance with LR's Code for Lifting Appliances in a Marine Environment, July 2022.

3.2 Documentation

3.2.1 Documentation is to be submitted that demonstrates the suitability of exposed equipment and components at low temperatures.

3.3 Equipment and components

3.3.1 The equipment and components of exposed members identified in Table 1.3.1 List of equipment and components and Figure 1.3.1 Mooring and anchoring sub-components are to comply with Ch 1, 3.4 Plating for plating, Ch 1, 3.5 Piping, valves and fittings for piping, valves and fittings, and Ch 1, 3.6 Forging and castings for forgings and castings, as appropriate.

Table 1.3.1 List of equipment and components

Main component	Sub-component	Class
Deck machinery and equipment
Windlass	Cable lifter	II
	Gear wheel	II
	Shaft	II
	Casing	I
	Foundation bolt	II
	Brake system	II
	Stripper bar	II
Mooring winches	Gear wheel	II
	Shaft	II
	Casing	I
	Foundation bolt	II
Winch motors	Hydraulics piping	II
Winch motors	Hoses	II
Winch controls	Hydraulics	II
Bollards/fairleads/bits		III
Anchor chain, see Note 3		II
Anchor	Crown/head, shackle & shank	II
Anchor	Crown/head pin & shackle/swivel pin	I
Anchor lashing		II
Chain stopper		II
Emergency towing system, see Note 2		I
Cargo handling systems
Cargo lines	Pipe	II
	Flange	II
	Valve	II
	Gaskets	I
	Bolts	I
Cargo loading manifold		I
Cargo heating steam line	Pipe	II
	Flange	II
	Valve	II
	Bolts	I
Hydraulic oil pipes for cargo valve remote control		II
Inert gas piping		I
Hull piping systems
Bunker lines to engine room	Pipe	I
	Flange	I
	Valve	I
	Bolts	I
Control air pipes		I
Fire-fighting systems
Fire main	Pipe	I
	Flange	I
	Valve	I
	Bolts	I
Water spray systems	Pipe	II
	Flange	II
	Valve	II
Foam systems		I
Emergency fire pump		I
Hydrants		I
Hydrant pipes		II
Fire flaps		I
Access on deck
Handrails		I
Structures on deck to provide shelter from seas/weather when working on deck during passage (excluding deckhouses and forecastles)		I
Access doors and hatches – hinges/dogs, etc. to accommodation and forecastle	Dogs/hinges	I
	Seals	I
Stairs		I
Note 1. Additional sub-components associated with the main component, which are not specified, are to be of a similar class to an equivalent sub-component which is specified. Note 2. Where the ETA is integrated with the bollards/fairleads/bits, the higher class is to be applied. Note 3. Anchor chain cables are to be, at least, grade U3, see Ch 1, 2.1 Hull construction materials 2.1.7. Note 4. A lower risk class may be accepted whereby it can be demonstrated from available experience and mitigation measures, where such are in place, that these measures would provide a level of protection that mitigates the risk, or whereby a risk assessment was undertaken for a specific vessel type/arrangement as in Winterisation MEn. Conversely, a higher risk class may be required for the same reason.

Figure 1.3.1 Mooring and anchoring sub-components

3.4 Plating

3.4.1 The following requirements are to provide steel grades with suitable notch toughness based on the thickness of the material and the external design air temperature. See Ch 3 Rolled Steel Plates, Strip, Sections and Bars of the Rules for the Manufacture, Testing and Certification of Materials, July 2022, for the properties and testing of steel grades. As an alternative for Classes I and II, steel may be to a national or international Standard showing equivalence to the Rules for the Manufacture, Testing and Certification of Materials, July 2022.

3.4.2 Table 1.2.2 Materials for Class I, Table 1.2.3 Materials for Class II and Table 1.2.4 Materials for Class III are to be used for determining the material grades for steel plates, strips, sections and bars used in machinery and systems components.

3.4.3 The following is to be used for determining the material certification for steel plates, strips, sections and bars used in machinery and systems components:

Class I	Manufacturer’s test report Document in which the manufacturer declares the products supplied are in compliance with the order and in which test results are supplied based on non specific testing.
Class II	Manufacturer’s certificate This is to be in accordance with Ch 1, 3.1 General 3.1.3.(c) of the Rules for the Manufacture, Testing and Certification of Materials, July 2022.
Class III	LR Certificate or Manufacturer’s certificate validated by LR This is to be in accordance with Ch 1, 3.1 General 3.1.3 or Ch 1, 3.1 General 3.1.3.(b) of the Rules for the Manufacture, Testing and Certification of Materials, July 2022, as appropriate.

3.5 Piping, valves and fittings

3.5.1 Table 1.3.2 Charpy testing temperature (°C) for Class I, Table 1.3.3 Charpy testing temperature (°C) for Class II and Table 1.3.4 Charpy testing temperature (°C) for Class III are to be used for determining the Charpy testing temperature for steel piping, valves and fittings used in machinery and systems components, in association with Pt 5, Ch 12 Piping Design Requirements of the Rules and Regulations for the Classification of Ships, July 2022. As an alternative for Class I, steel may be to a national or international Standard showing equivalence to the Rules for the Manufacture, Testing and Certification of Materials, July 2022.

Table 1.3.2 Charpy testing temperature (°C) for Class I

Thickness, mm	External design air temperature
Thickness, mm	–33°C to –38°C	–39°C to –48°C	–49°C to –58°C	–59°C to –68°C
t ≤ 10	0	0	–20	–20
10 < t ≤ 15	0	–20	–20	–20
15 < t ≤ 20	0	–20	–20	–40
20 < t ≤ 25	–20	–20	–20	–40
25 < t ≤ 30	–20	–20	–40	–40
30 < t ≤ 35	–20	–20	–40	–40
35 < t ≤ 45	–20	–40	–40	–60
45 < t ≤ 50	–40	–40	–60	–60

Table 1.3.3 Charpy testing temperature (°C) for Class II

Thickness, mm	External design air temperature
Thickness, mm	–33°C to –38°C	–39°C to –48°C	–49°C to –58°C	–59°C to –68°C
t ≤ 10	0	–20	–20	–40
10 < t ≤ 20	–20	–20	–40	–40
20 < t ≤ 30	–20	–40	–40	–60
30 < t ≤ 40	–40	–40	–60	–60
40 < t ≤ 45	–40	–60	–60	n/a
45 < t ≤ 50	–40	–60	–60	n/a

Table 1.3.4 Charpy testing temperature (°C) for Class III

Thickness, mm	External design air temperature
Thickness, mm	–33°C to –38°C	–39°C to –48°C	–49°C to –58°C	–59°C to –68°C
t ≤ 10	–20	–20	–40	–40
10 < t ≤ 20	–20	–40	–40	–60
20 < t ≤ 25	–40	–40	–60	–60
25 < t ≤ 30	–40	–40	–60	–60
30 < t ≤ 35	–40	–60	–60	n/a
45 < t ≤ 40	–40	–60	–60	n/a
40 < t ≤ 50	–60	–60	n/a	n/a

3.5.2 For the application of Table 1.3.2 Charpy testing temperature (°C) for Class I to Table 1.3.4 Charpy testing temperature (°C) for Class III, the material classes as given in Pt 5, Ch 12 Piping Design Requirements are to be reversed, e.g. Class III is to be taken as Class I.

3.5.3 In general, the minimum average Charpy impact average energy (J) is to be 10 per cent of the specified minimum yield strength (N/mm²) up to a maximum of 50 J.

3.5.4 The following is to be used for determining the material certification for steel piping, valves and fittings used in machinery and systems components, in association with Pt 5, Ch 12 Piping Design Requirements:

Class I – Manufacturer’s certificate
This is to be in accordance with Ch 1, 3.1 General 3.1.3.(c) of the Rules for the Manufacture, Testing and Certification of Materials, July 2022.
Classes II and III – LR Certificate or Manufacturer’s certificate validated by LR
This is to be in accordance with Ch 1, 3.1 General 3.1.3 or Ch 1, 3.1 General 3.1.3.(b) of the Rules for the Manufacture, Testing and Certification of Materials, July 2022, as appropriate.

3.6 Forging and castings

3.6.1 Table 1.3.5 Charpy testing temperature (°C) for all classes is to be used for determining the Charpy testing temperature for steel forgings and castings used in exposed machinery and systems components.

Table 1.3.5 Charpy testing temperature (°C) for all classes

Material class	External design air temperature
	–33°C to –38°C	–39°C and below
Class I or II	–20	To be specially considered
Class III	–40
Note For components manufactured and installed without welding, the test temperature may be increased by +20°C, but is not to be taken higher than 0°C.

3.6.2 In general, the minimum average Charpy impact energy is to be greater than (E + f) in Joules (J),
where

E is the minimum average energy value:
27J for steels with specified minimum yield strength less than 300 N/mm²;
34J for steels with specified minimum yield strength equal to or greater than 300 N/mm²
f is m multiplied by the difference between the required test temperature as given in Table 1.3.6 Example of required test criteria and the certified test temperature to be shown on the test certificate
m is the slope of the transition curve; for steels, m is taken as a value of 3.
An alternative value of m may be used where material impact transition properties have been demonstrated from either a single supplier of known consistency or a number of suppliers (minimum of three) where a lower bound approach is taken to a series of transition curves

For example, for steel with a specified minimum yield strength less than 300 N/mm² and where the external design air temperature is equal to –40°C for a Class III component, the Charpy testing temperature and criteria may be taken as shown in Table 1.3.6 Example of required test criteria.

Table 1.3.6 Example of required test criteria

Required Charpy test temperature °C	Minimum energy value, E, J	Certified Charpy test temperature °C	Transition slope value, m	Difference in test temperature multiplied by m, f, °C	Criteria for Charpy impact energy, J
–40	27	–40	3	0	27
–40	27	–20	3	60	87
–40	27	+0	3	120	147

3.6.3 Where a component has dedicated heating arrangements that protect the entire component, the Charpy testing temperature may be taken as 20°C above the required Charpy testing temperature at an external design air temperature of -33°C and as a Class I/II component.

3.6.4 Cast iron is not permitted.

3.6.5 The requirements in Ch 1, 3.5 Piping, valves and fittings 3.5.4 are to be used for determining the material certification for forgings and castings used in machinery and systems components.

3.7 Other materials

3.7.1 The testing requirements for piping, valves and fittings used in machinery and systems components of other materials will be specially considered in accordance with the manufacturer’s recommendations.