Kinds

Type test item

flexible couplings

In the type tests of flexible couplings, the following items (a) through (e) are to be included. For sys- tems intended to control a deflection as well as a torsion, the tests in (a) through (e) are to be carried out under the condition of imposing the maximum allowable deflection.

(a) Test to confirm the allowable mean torque

(b) Test to confirm the maximum allowable transient torque

(c) Test to confirm the allowable alternating torque (imposing the mean torque)

(d) Test to confirm the value of torsional rigidity

(e) Other tests as deemed necessary by the Society due to the own construction

Kind 1 pro- peller shafts with corro- sion resisting

(A) In the type tests for kind 1 propeller shafts with rubber sleeve, following items are to be included.

(a) The following physical tests by the method indicated in KS M 6518.

In these tests, test specimens are to be vulcanized under the condition shown in "Work Procedure Manual" for the maximum diameter of propeller shaft for which an approval will be given.

(ⅰ) Tensile test (including elongation test)

(ⅱ) Hardness test

(ⅲ) Tear test

(ⅳ) Test for static modulus of elasticity

(ⅴ) Aging tests relating to items (i) through (iv)

(ⅵ) Dipping test

(ⅶ) Adhesion test (bonded parts between rubber, ebonite, shaft and sleeve)

(b) Peeling test by the method indicated in KS M 6518.

In this case, the test shaft is to be of a model shaft with the maximum diameter worked up in accordance with the "Work Procedure Manual".

Kinds

Type test item

Kind 1 pro- peller shafts with corro- sion resisting

(c) Following items are to be included in the "Work Procedure Manual" referred to in the preceding items (a) and (b) and 1502. (1).

(ⅰ) The shape of the copper alloy sleeve on which rubber sleeve is bound.

(ⅱ) Work details including the materials used, construction, dimensions, vulcanizing conditions

(temperature, pressure and time interval) of the portion of rubber sleeve.

(ⅲ) The procedure of permanent marking on the product (serial No., date of manufacture, name

of company who carried out the work, the Society's approval No., material of the mark tag,

size, etc.)

(B) In the type tests of kind 1 propeller shafts with synthetic resin sleeve, following items are to be included.

(a) Watertightness verification test with the test shaft worked up in accordance with the "Work Procedure Manual"

This test is to be carried out as the endurance test of the watertightness at the portion between

synthetic resin sleeve and copper alloy sleeve under repeated twisting and bending loads. In this case, the construction drawing of the test shaft and the drawing of the test rig are to be in- dicated in the type test program.

(b) Adhesion test correspondingly in accordance with KS M 6518 (adhesion between the bonded areas of synthetic resin, shaft and sleeve)

(c) Water absorption rate test at the portion of synthetic resins is to be as deemed appropriate by the

Society.

(d) Falling ball impact test at the portion of synthetic resins correspondingly in accordance with KS M 3074

(e) Real ship tests

The shafts which have passed the type tests, are to be subjected to real ship tests. In ships hav- ing a post-installing period of two years, the condition of coatings is to be confirmed in the presence of the Surveyor.

(f) Following items are to be included in the “Work Procedure Manual” referred to the preceding (a) and 1502. (1).

(ⅰ) Environmental conditions involved in the work

(ⅱ) Environment control system relating to temperature, humidity, sanitation, etc.

(ⅲ) Work procedure of the shape at the portion of the copper alloy sleeve where synthetic resin

sleeve is bound

(ⅳ) Work details including the materials, construction, dimensions, etc. at the portion of synthetic

resin sleeve

(ⅴ) The procedure of permanent marking on the product (serial No., date of manufacture, name

of company who carried out the work, the Society's approval No., material of the mark tag,

size, etc.)

(C) Type tests of kind 1 propeller shafts with other materials are to be as deemed appropriate by the Society.

Stern tube bearings

(A) Confirmation tests for the characteristics of materials

(a) In the case of vulcanized rubber, the following tests specified in KS M 6518

(ⅰ) Tensile test

(ⅱ) Hardness test

(ⅲ) Tension set test

(ⅳ) Adhesion test

(ⅴ) Test for adhesion to metals (except those not to be adhered to metals)

(ⅵ) Tear test

(ⅶ) Compression set test

(ⅷ) Dipping test (in the case of a water-lubricated system, tests are to be carried out using sea

water) (ⅸ) Aging test

(b) In the case of materials other than those specified above in (a), tests according to pertient na- tional standards or other equivalent standards concerning the contents of (a) according to the materials.

(B) Abrasion test

(C) Seizure critical load test

(D) Running test (In this case, confirm that the bearing pressures during the tests are to be verified are not less than 0.8 MPa for an oil-lubricated system, and are not less than 0.2 for a water-lu- bricated system respectively.)

(E) "Type test program" submitted according to 102. 3 (1) (A) is to include the following items:

(a) Drawing of the test rig

(b) Drawing of the product (specified the materials, dimensions, etc.)

(c) Condition of tests (lubrication system, shaft speed, bearing load, hydraulic pressure, test time, etc.)

Kinds

Type test item

Stern tube sealing devices

(A) "Type test program" submitted according to 102. 3 (1) (A) is to include the following items:

(a) Drawings of the test rig

(b) Drawings of test product specifying the construction, materials, dimensions, etc.

(c) Plans of test conditions specifying the lubrication system, shaft speed range, surface pressure of

the bearing, hydraulic pressure, test hours, etc.

(B) In principle, the duration of performance tests is to be not less than 1,000 hours. The temperature (keep up 55°C and less), quantity of leakage (or consumption) per hour and pressure, etc. are to be

checked in accordance with 'Type test program' during the tests. Dismantle after the tests and in- spect the dimensions, wear and corrosion, etc. The consumption of lubricating oil per day is to be 2 and less for the oil-lubricated system.

Pipes of special materials

In the type tests for pipes of special materials, the following items are to be included according to their applications and kinds of materials as deemed necessary by the Society:

(A) Tests specified in KS M 6540 (Testing Methods for Rubber Hoses), ISO 1436 & 3862 (Rubber ho- ses and hose assemblies wire-reinforced hydraulic type), etc.

(B) Flame-resistant test

This test applies to piping system containing fuel oil, lubricating oil, hydraulic oil and sea water where leakage or failure could result in fire or flooding in the machinery space. The testing proce- dures are to be as follows: The test pipe at the design pressure (in the case of less than 0.5 MPa,

0.5 MPa is to be taken) and the design temperature (the temperature at outlet, in the case of less than 80°C, 80°C is to be taken) with fluid flowing through is to be exposed to a flame on the surface and held at a temperature of 800°C for a period of 30 minutes. Following the fire test, a pressure test is to be carried out at a pressure twice the design pressure (in the case of less than 1 MPa, 1 MPa is to be taken), whereby it is to be verified that the test pipe is free from abnormality.

(C) For rubber hoses used for the contact freezer, the tests specified in the following (a) and (b):

(a) Pressure test at a pressure twice the design pressure or 2 MPa, whichever is the greater

(b) Rupture test at a pressure of 8 MPa or more

Cargo pipings, pumps and cargo hoses of ships carrying liquefied gases in bulk

Type tests specified in Pt 7, Ch 5, 503. and 507. are to be carried out in accordance with following requirements. Type tests of other systems and equipment which the Society deems necessary are to be considered by the Society in each case.

(A) Valve : The following type tests are to be performed on each size and type of valve.

(a) Hydrostatic test of the valve body at a pressure equal to 1.5 times the design pressure for all valves.

(b) Cryogenic testing consisting of valve operation and leakage verification at design temperature, and a seat and stem leakage test at a pressure equal to 1.1 times the design pressure for valves other

than safety valves.

(c) Cryogenic testing consisting of safety valve set pressure and leakage verification at design temper- ature for safety valves.

(B) Expansion Bellows : The following type tests are to be performed on each type of expansion bellows.

(a) A type element of the bellows, not precompressed, should be pressure tested at not less than 5 times the design pressure without bursting. The duration of the test should not be less than 5 min.

(b) A pressure test should be performed on a type expansion joint complete with all the accessories

such as flanges, stays and articulations, at twice the design pressure at the extreme displacement conditions recommended by the manufacturer without permanent deformation. Depending on the

materials used, the Society may require the test to be at the minimum design temperature.

(c) A cyclic test (thermal movements) should be performed on a complete expansion joint, which is to successfully withstand at least as many cycles, under the conditions of pressure, temperature, axial movement, rotational movement and transverse movement, as it will encounter in actual

service. Testing at ambient temperature is permitted, when this testing is at least as severe as testing at the service temperature.

(d) A cyclic fatigue test (ship deformation) should be performed on a complete expansion joint, with- out internal pressure, by simulating the bellows movement corresponding to a compensated pipe

length, for at least 2,000,000 cycles at a frequency not higher than 5 cycles s. This test is only required when, due to the piping arrangement, ship deformation loads are actually experienced.

(e) The Society may waive performance of the tests referred to in this paragraph provided that com- plete documentation is supplied to establish the suitability of the expansion joints to withstand the expected working conditions. When the maximum internal pressure exceeds 1.0 MPa gauge this documentation is to include sufficient test data to justify the design method used, with particular reference to correlation between calculation and test results.

Kinds

Type test item

Cargo pipings, pumps and cargo hoses of ships carrying liquefied gases in bulk

(C) Cargo pumps : The following type tests are to be performed on each size and type of pumps.

However, for the pump designed the same as an existing pump approved by the Society and having

satisfactory in-service experience, consideration may be given to waiving the tests.

(a) hydrostatic test of the pump body equal to 1.5 times the design pressure

(b) the capacity tests in compliance with the following

(i) For submerged pumps, the capacity test is to be carried out with the design medium or with a medium below the design temperature.

(ii) For deep well pumps, the capacity test may be carried out with water. In addition, for deep

well pumps, a spin test to demonstrate satisfactory operation of bearing clearances, wear rings and sealing arrangements is to be carried out at the design temperature.

(c) After completion of tests, the pump is to be opened out for examination.

(D) Cargo hoses : Each new type of cargo hose, complete with end-fittings, are to be type tested at a normal ambient temperature. However, for the cargo hose designed the same as an existing cargo hose approved by the Society and having satisfactory in-service experience, consideration may be given to waiving the tests.

(a) cycle pressure test of 200 pressure cycles from zero to at least twice the specified maximum working pressure

(b) bursting pressure test of at least 5 times its specified maximum working pressure at the extreme service temperature

Gas fuel pipings and pumps for gas fuelled ships

Type tests specified in Ch 3, 605., 606. and 607. of the Guidance for gas fuelled ships are to be car- ried out in accordance with the type test requirements of cargo pipings and pumps of ships carrying liquefied gases in bulk.

Fuel pipings and pumps for fuel cell systems on board of ships

Type tests specified in Ch 3, 605., 606. and 607. of the Guidance for fuel cell systems on board of ships are to be carried out in accordance with the type test requirements of cargo pipings and pumps of ships carrying liquefied gases in bulk.