Iranian Classification Society Rules
< Previous | Contents | Next >
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
(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/mㆍK) (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/mㆍK) (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 | |||
190 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
(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/mㆍK) (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/mㆍK) (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/mㆍK) (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. | ||||||
Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 191
Kind | Density kg m | Thermal conductivity (W/mㆍK) (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/mㆍK) (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.
192 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
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
Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015 193
Table 3.27.10 Approval Test Items and Testing Procedure for Tank Side Covering
Item | Method |
Vibration test |
|
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 |
194 Guidance for Approval of Manufacturing Process and Type Approval, Etc. 2015
