Iranian Classification Society Rules

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Section 27 Materials for Refrigerated Chambers and Oil-impervious Composition


2701. Application


1. The requirements in this Section apply to tests and inspection for the type approval of materials in- tended to be used for insulating the refrigerated chambers and oil-impervious composition provided for the surface oil tanks adjacent refrigerated chambers in accordance with the requirements of Pt 9, Ch 1, 502. 1 and 3 of the Rules.


2. For materials for refrigerated chambers of ships carrying liquefied gases in bulk in accordance with the requirements of Pt 7, Ch 5, Sec 4 of the Rules, the requirements of this Section are corre- spondingly applied.


2702. Data to be submitted

The following reference data are to be submitted to the Society in addition to those specified in

102.

(1) Process of manufacture

(2) Installation procedures on board (including precautions for working if any)

(3) Painting procedures of oil-impervious covering

(4) Packaging and marks (labels, symbol, etc.)

(5) Physical properties of products assured by the manufacturer

(6) Storage method of products

(7) Service records


2703. Type tests


1. General


(1) The type tests specified in Par 2 or 3 are to be carried out in the presence of the Surveyor where the submitted documents are considered acceptable.

(2) Applicants are to submit the test plan describing the test place, testing procedure, etc., in

advance.

(3) It is recommended that the above test plan is submitted with application form letter.

(4) Test samples are to be picked out, in general, from the products by the direction of the Surveyor upon the survey at confirmation survey.

(5) Three copies of the test record are to be submitted to the Society.

(6) The type tests may be omitted when the test is carried out at a recognized testing organization and the test records are to be submitted to the Society.

2. Insulation materials

(1) The items represented by mark O in Table 3.27.1 are to be tested for the insulation materials.

However, materials not given in the table are to be considered in each case.


Table 3.27.1 Type Test Items of Insulation Materials



Main materials

Thermal conductivity


Density

Bending strength

Compressive strength

Water absorption

Water content

Combustion test


Others


KS


Mineral wool

Heat shrinkage, Particle content


L 9102

Glass wool

Heat shrinkage

L 9102


Calcium silicate

Water repellency and shrinkage


L 9101


Foam polystyrene

Water vapor permeability


M 3808


Pearlite

Water repellency and shrinkage


F 3701


Rigid foam urethane

Water vapor permeability and rust test


M 3809


Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 189

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(2) Testing procedure and acceptance criteria

The testing procedures are to be in accordance with the requirements of KS nizant standards, and acceptance criteria are to be as belows.

(A) Acceptance criteria for mineral wool is to be as specified in Table 3.27.2.



Kind

Density


Thermal conductivity (W/mK)

(Ave. temp. 70±5)

Heat shrinkage

()

Diameter of fibre

m

Particle content (%)


kg m

allowance

Mineral wool

40~150

Max. 0.044

Min. 650

Max. 7

Max. 4


Insulation board

No.1

71~100


-15%

Max. 0.044


Min. 600


-


-

No.2

101~160

Max. 0.043

No.3

161~300

Max. 0.044

Felt

40~70

Max. 0.049

Min. 400


Insulation band

No.1

71~100

Max. 0.052


Min. 600

No.2

101~160

Max. 0.049


Blanket


No.1

a

40~70

Max. 0.049

Min. 400

b

71~100

Max. 0.044


Min. 600

No.2

101~160

Max. 0.043

Insulation pipe cover

40~200

Max. 0.044

Table 3.27.2 Test items and acceptance criteria for Mineral wool


(B) Acceptance criteria for glass wool is to be as specified in Table 3.27.3. Table 3.27.3 Test items and acceptance criteria for glass wool


or other recog-


Kind

Density


Thermal conductivity (W/mK)

(Ave. temperature 70±5)

Heat shrinkage

kg m

allowance


glass wool

No. 2

-

-

Max. 0.042


Min. 400

No. 3

-

-

Max. 0.049


Insulation board


No. 2

24k

24

+3, -2

Max. 0.049


Min. 300

32k

32

±4

Max. 0.046


40k


40

+4

-3


Max. 0.044


Min. 350

48k

48

+4, -3

Max. 0.043

64k

64

±6


Max. 0.042


Min. 400

80k

80

±7

96k

96

+9, -8

120k

120

±12


No. 3

80k

80

±7


Max. 0.047

96k

96

+9, -8

120k

120

±12


blanket


No. 2

a

24~40

Max. 0.048

Min. 350

b

41~120

Max. 0.043

Min. 400


Insulation band


No. 2

a

22~36


Max. 0.052

Min. 300

b

37~52

Min. 350

c

58~132

Min. 400

Insulation pipe cover

40~90

Max. 0.043

Min. 350


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(C) Acceptance criteria for calcium silicate is to be as specified in Table 3.27.4. Table 3.27.4 Test items and acceptance criteria for calcium silicate



Kind


Density kg m


Thermal conductivity (W/mK)

(Ave. temperature 70±5)


Bending strength N cm


Shrinkage

%

Water repellency(2)

%

Board No.1-13 Pipe Cover No.1-13


Max. 130(1)


Max. 0.049


Min. 20


Max. 2.0

free from spitting and/or twisting


Min. 98.0

Board No.2-17 Pipe Cover No.2-17


Max. 170


Max. 0.055


Min. 20

Board No.1-22 Pipe Cover No.1-22


Max. 220


Max. 0.062


Min. 30

Board No.2-22 Pipe Cover No.2-22


Max. 0.062


Min. 30

Notes

1. In case where the thickness of insulation board No.1-13 and pipe cover No.1-13 is not more than 30mm,

density can be max. 155 kg m .

2. Not to be applied if water repellency is not required.


(D) Acceptance criteria for foam polystyrene is to be as specified in Table 3.27.5 and 3.27.6

(a) Insulation board and pipe cover made by polystyrene bead.


Table 3.27.5 Test items and acceptance criteria for polystyrene bead.



Kind


Density kg m


Thermal conductivity (W/mK)


(Ave. temperature 20±5)


Bending strength N cm


Compressive strength N c


Water absorption g/100


Combustion test


Water Vapor Permeability(1)

ng m s P a.

Class 1

Class 2


Insulation board


No.1

Min. 30

Max. 0.036

Max. 0.031


Min. 35


Min. 16


Max. 1


Flame is to be extinguished without remains within 3 minutes. And not to burn over the combustion limit line.


Max. 146


No.2

Min. 25

Max. 0.037

Max. 0.032


Min. 30


Min. 12


Max. 208


No.3

Min. 20

Max. 0.040

Max. 0.033


Min. 22


Min. 8


Max. 250


No.4

Min. 15

Max. 0.043

Max. 0.034


Min. 15


Min. 5


Max. 1.5


Max. 292


Insulation board


No.1

Min. 35

Max. 0.036

Max. 0.031


Min. 30


-


t 30 mm

: Max. 2,

t 30 mm

: Max. 1


-


No.2

Min. 30

Max. 0.036

Max. 0.032


Min. 25


No.3

Min. 25

Max. 0.037

Max. 0.033


Min. 20

Note

1. To be measured per 25 mm in thickness for reference.

(b) Insulation board and pipe cover made by polystyrene extrusion.


Table 3.27.6 Test items and acceptance criteria for polystyrene extrusion.



Kind


Pressure test N cm

Bending strength N cm


Thermal conductivity (W/mK)

(Ave. temperature 70±5)


Combustion test

Water Vapor Permeability(1) ng m


Insulation board

Special

Min. 25

Min. 45

Max. 0.027


Flame is to be extinguished without remains within 3 minutes. And not to burn over the combustion limit line.


Max. 146

No.1

Min. 18

Min. 35

Max. 0.028

No.2

Min. 14

Min. 30

Max. 0.029

No.3

Min. 10

Min. 25

Max. 0.031

Note

1. To be measured per 25 mm in thickness for reference.


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Kind


Density kg m


Thermal conductivity (W/mK)

(Ave. temperature 70±5)

Bending strength N cm


Shrinkage

Water repellency

Insulation board (pipe cover) No.1

Max. 200

Max. 0.062

Min. 25

Max. 2.0


Min. 98

Insulation board (pipe cover) No.2

Max. 155

Max. 0.055

Min. 20

Max. 2.0

High temp. insulation board (pipe cover) No. 1


Max. 250


Max. 0.072


Min. 25


Max. 2.0


Min. 98

High temp. insulation board (pipe cover) No. 2


Max. 185


Max. 0.056


Min. 20


Max. 2.0

(E) Acceptance criteria for Pearlite is to be as specified in Table 3.27.7. Table 3.27.7 Test items and acceptance criteria for pearlite



Kind


Density

kg m

Thermal conductivity

(W/mK)

(Ave. temp. 20±5)


Bending strength N cm


Pressure test

N cm


Water absorption g/100 cm


Combustion test


Water Vapor Permeability(1) ng m s Pa


Rust test


Insulation board


Grade 1


No.1


Min.45


Max. 0.024


Min. 35


Min. 30


Max. 3.0

Burning time is to be within 120 sec. and length is not more than 60mm.


Max. 145


(2)


No.2


Min.35


Max. 0.024


Min. 25


Min. 20


Max. 185


No.3


Min.25


Max. 0.025


Min. 15


Min. 10


Max. 225


Grade 2

No.1

Min.45

Max. 0.023

Min. 35

Min. 15


-

Max. 40

No.2

Min.35

Max. 0.023

Min. 25

Min. 10

Max. 40

No.3

Min.25

Max. 0.024

Min. 15

Min. 8

Max. 40


Insulation pipe cover

No.1

Min.45

Max. 0.024

Min. 35

Min. 30


-

Max. 145

No.2

Min.35

Max. 0.024

Min. 25

Min. 20

Max. 185

No.3

Min.25

Max. 0.025

Min. 15

Min. 10

Max. 225

Note

1. To be measured per 25 mm in thickness for reference.

2. Weight loss is to be not more than the weight loss of specimen without flame retardant. However this value is used as for reference.

(F) Acceptance criteria for Rigid foam urethane is to be as specified in Table 3.27.8. Table 3.27.8 Test items and acceptance criteria for rigid foam urethane


(3) Test items and test methods of materials for refrigerated chambers of ships carrying liquefied gases in bulk are to be in accordance with the requirements in Pt 7, Ch 5 of the Guidance re- lating to the Rules for the Classification of Steel Ships.


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3. Oil-impervious covering

(1) Tank top covering

The test items and testing procedure given in Table 3.27.9 are to be carried out for top covering.


the tank


Table 3.27.9 Type Test Items and Testing Procedure for Tank Top Covering for Oil Tanks


Test item

Test procedures


Odor test

The inner surface of an appropriate container is to be coated with the covering and the outer surface is to be warmed up and kept at 65°C by hot water, etc. It is to be verified whether or not harmful odor is generated.


Bending strength

To be in accordance with KS F 2407 (Testing method for flexural strength of con- crete (Using simple beam with center-point loading))

Compression strength

To be in accordance with KS F 2405 (Testing method for compressive strength of molded concrete cylinders)


Oil absorption test

Test piece of tank top covering (30 cm × 30 cm) is to be immersed for 24 hours in heavy oil at 65°C and measure the increase of weight. 15% or less of weight in- creasing is acceptable.


Oil tightness test

The tank top covering is to be coated on the top of steel container where 20 holes of 6 mm diameters are drilled with 100 mm pitch. 0.2 MPa oil pressure is to be ap- plied to the inner surface and be kept for 24 hours. It is to be verified that no oil permeates through the 6 mm holes.

Combustion test

To be in accordance with the combustion test in 2 (2).


(2) Additional tests

The tests are to be carried out in accordance with requirements specified in Table 3.27.9 In

addition to covering.

these tests, the tests given in Table 3.27.10 are to be carried out for the tank

side


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Table 3.27.10 Approval Test Items and Testing Procedure for Tank Side Covering


Item

Method


Vibration test


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After the oil tightness test, the container is to be vibrated for 4 hours. (Vibration conditions of approximately 8 Hz frequency and about 0.10 to 0.50 mm half amplitude are to be maintained. After the vibration test, heavy oil is filled up in the container and left for 17 hours. It is to be verified that no leakage of oil and no peeling off of covering occurred.


Hammering test


The inside of the test container is to be patted with a 5 kg hand hammer, and it is to be veri- fied that no crack and no peeling off occurred.


Adhesion test


A test sample is to be bundles up from the surface of the tank and detached by scraper to check adhesion hardness and permeation of fuel oil.


Heating test


The internal surface of the tank is to be heated as follows to check the dissolution conditions of the test sample and the adhesive condition using a scraper.

Heating time: 3 minutes Heating temperature: 600 °C

Heating area: Approximately 100 mm in diameter


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