1、BSI Standards PublicationBS ISO 17683:2014Ships and marine technology Ceramic weld backing formarine useBS ISO 17683:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 17683:2014.The UK participation in its preparation was entrusted to TechnicalCommittee SME/
2、32/-/8, Ships b) type II ceramic weld backing with metal cases. ISO 2014 All rights reserved 1BS ISO 17683:2014ISO 17683:2014(E)5 Dimensions and appearance5.1 GeneralFor inspection of its dimensions and appearance, six strips of ceramic weld backing shall be randomly selected. Each one of the sample
3、s shall meet the requirements in 5.2 and 5.3.5.2 Dimensions5.2.1 The tolerance of thickness for ceramic weld backing block shall be 0,5 mm of its thickness.5.2.2 The length tolerance for a strip of ceramic weld backing shall be 10 mm to +20 mm of its length.5.2.3 The centreline tolerance for ceramic
4、 weld backing block with moulding groove shall be 1,0 mm.5.2.4 The angle tolerances of a triangular or trapezoidal ceramic weld backing block shall be 2.5.3 Appearance5.3.1 Defects, such as damage and rounded corners, are not allowed for the joints between ceramic weld backing blocks other than roun
5、ded corners made by the mould itself.5.3.2 Within the area of the groove of the ceramic weld backing blocks and 2 mm on either side of them, mould sticking grain shall not be larger than 0,5 mm and the defect of the pit and damages shall not be more than 0,5 mm on the surface of the ceramic weld bac
6、king blocks.6 Performance and test6.1 Moisture absorption rate6.1.1 The moisture absorption rate shall be measured as follows.a) Randomly select three samples among the ceramic weld backing blocks. The dust on their surface shall be blown clear. Lay the samples on a tray, then put into an oven of co
7、nstant temperature and humidity together.b) Switch on the power of the oven and adjust the humidity to (95 3) % and the temperature to (25 2) C.c) Keep the samples and tray in the oven for 4 h, then take the samples out of the oven, weigh all samples, and record the weights as m2separately with an a
8、ccuracy of 0,001 g.d) Lay the samples on the tray, then place into the oven of constant temperature. Switch on the power of the oven, adjust the temperature to 200 C, and keep for 2 h.e) Take the samples out of the oven and keep it in the dryer until it cools down to the room temperature. Weigh all
9、samples by an analytical balance, and record the weights as m1separately with an accuracy of 0,001 g.f) The moisture absorption rate for each sample shall be calculated in accordance with Formula (1).2 ISO 2014 All rights reservedBS ISO 17683:2014ISO 17683:2014(E)Wmmma=211100% (1)whereWais the value
10、 of the moisture absorption rate (%);m1is the weight of dried sample (g);m2is the weight of sample which has absorbed water vapour sufficiently (g).g) Calculate the average value of the three samples.6.1.2 The average value of the moisture absorption rate shall be less than 0,35 %.6.2 Refractoriness
11、6.2.1 The refractoriness should be determined according to the welding method and melting point for the metal to be welded.6.2.2 Randomly select one ceramic weld backing block. The test of the refractoriness shall be conducted according to ISO 528.6.3 Chemical composition6.3.1 The content of sulfur
12、and phosphorus in the ceramic weld backing shall be analysed by an appropriate method and shall be less than 0,1 %.6.3.2 The content of boron in the ceramic weld backing shall be analysed by an appropriate method and shall be less than 0,01 %.6.3.3 Any analytical technique can be used, but in case o
13、f dispute, reference shall be made to established, published methods.6.4 Adhesive aluminium foil tape6.4.1 Randomly select one strip of type I ceramic weld backing for the adhesive aluminium foil tape test.6.4.2 The peeling strength of adhesive aluminium foil tape shall be determined in accordance w
14、ith ISO 29862 and shall be more than 12 N/25 mm.6.5 Metal cases6.5.1 Randomly select one strip of type II ceramic weld backing for the metal cases test.6.5.2 Erect the strip of ceramic weld backing, and there is no loose between the ceramic weld backing and metal cases. ISO 2014 All rights reserved
15、3BS ISO 17683:2014ISO 17683:2014(E)7 Type approval test7.1 GeneralThe type approval test shall be carried out under one of the following situations:a) initial production;b) upon reproduction or re-manufacturing, after being suspended from production for half a year or more, or production for 4 y con
16、tinuously;c) whenever the manufacturing technique which could affect the performance or quality of the products, or its ingredient and raw material, is changed significantly.7.2 Test itemsThe following tests for type approval shall be carried out, in addition to the items required in 5.2 and 5.3:a)
17、moisture absorption rate (see 6.1);b) refractoriness (see 6.2);c) chemical composition (see 6.3);d) adhesive aluminium foil tape (for type I) (see 6.4);e) metal cases (for type II) (see 6.5).7.3 Acceptance criteriaIf the samples meet all test requirements, the batch of ceramic weld backing will be d
18、eemed to have passed the type test. However, if the samples fail to meet any of the test requirements, additional double of samples shall be tested. If the additional samples pass all test requirements, the batch of ceramic weld backing will be deemed to have passed the type test. Otherwise, the bat
19、ch of ceramic weld backing will be deemed to have failed the type test.8 Acceptance test8.1 Test itemsPrior to delivery of the batch of ceramic weld backing blocks, the manufacturer shall test every batch of ceramic weld backing block for the following items:a) dimensions and tolerances (see 5.2);b)
20、 appearance (see 5.3);c) moisture absorption rate (see 6.1);d) chemical composition (see 6.3).8.2 Acceptance criteriaWith the same lot of raw materials, ingredients, and manufacturing technique, the ceramic weld backing can be inspected as one batch which should not be more than 500 000 m. If less t
21、han 500 000 m, the products should be treated as a batch.4 ISO 2014 All rights reservedBS ISO 17683:2014ISO 17683:2014(E)If the batch of ceramic weld backing meets the requirements specified in 8.1, the batch of the products will be deemed to have passed the acceptance test. However, if some samples
22、 fail to meet any of the test requirements, additional double of samples can be allowed only one time for re-test. If the additional samples pass the test requirements in 8.1, the batch of the products will be deemed to have passed the acceptance test. Otherwise, the batch of the products will be de
23、emed to have failed the acceptance test.9 Marking, packaging, and storage9.1 Marking9.1.1 The type of an accepted ceramic weld backing is to be marked after the number of this International Standard (i.e. ISO 17683). For example, a ceramic weld backing of type I is to be marked as follows:Ceramic we
24、ld backing ISO 17683-I9.1.2 Markings on the package shall have the following information:a) the number of this International Standard (i.e. ISO 17683:2014);b) the name of the manufacturer or supplier;c) the trade name, lot number, and number of pieces;d) health and safety warnings as required;e) the
25、 country of origin.9.2 PackagingCeramic weld backing shall be suitably packaged to ensure against damage during shipment and storage under normal conditions.9.3 StorageThe ceramic weld backing should be maintained in a dry, ventilated room. ISO 2014 All rights reserved 5BS ISO 17683:2014ISO 17683:20
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