JC/T 932-2013Drainage fittings for sanitary wares (English PDF)

5.1 Requirements for connection dimension

The dimension of connection of waste fitting shall meet the requirements of Annex A.

5.2 Processing and assembling

5.2.1 The exterior surface of metal parts of product shall be free from defects such as sand hole, shrinkage cavity, crack and air hole.

5.3 Appearance

5.3.1 The cuspidal edge, flash and burr of the exterior surface of product shall be cleared off.

5.3.2 The polished external surface texture shall be consistent in direction, harmonious and free from curly grain.

5.3.3 The visible plated-surface shall be uniform, and free from phenomenon such as peeling, exfoliation, foaming and un-plated.

5.3.4 After the waste fitting is subjected to acetic acid-salt spray test for 24h according to

6.3.4; the visible plating-layer under the installation and use state and the invisible plating-layer shall not be lower than the requirements for Grade 9 and Grade 6 of appearance rating (RA) in Table 1 of GB/T 6461-2002 respectively.

5.4 Requirements for wall thickness of waste fitting pipe

5.4.2 Part of plastic pipe

The wall thickness of plastic pipe and pipe fitting shall not be less than 1.57mm.

5.5 Trap seal

Trap seal of waste fitting with trap shall not be less than 50 mm.

5.6 Stability of water sealing

Test the waste fitting with trap according to the method in 6.6 and the trap seal after test shall not be less than 50 mm.

5.7 Performance requirements

5.7.1 Sealing performance

5.7.2 Flow performance

Conduct test according to the method in 6.7.2; the flow performance of waste fitting shall not be lower than the requirements of Table 1.

5.7.3 Overflow performance

5.7.3.1 Test is conducted according to the method in according to 6.7.3; the flow of waste fitting shall not be lower than the requirements of Table 2.

5.8 Bearing performance

For test conducted according to the method in 6.8, the significant surface of waste fitting matching bath-tub and shower room shall be free from crack, and the deformation amount shall not be greater than 3%.

5.9 Service life

After 10 000 cycles of service life test according to the method in 6.9, the product shall be free from significant defect, and convenient for disassembly, and free from the defects that affect the use function; after service life test, test is conducted according to 5.2.4.The change of test result shall not exceed ±20%, and shall meet the requirements of 5.7.1.

5.10.3 Dotty impact

For test conducted according to the method in 6.10.3, the surface of waste fitting shall be free from significant damage.

6.1 Test on requirements for connection dimension

The test on dimension of connection of waste fitting shall be conducted with Vernier caliper with precision of 0.02 mm or test equipment with equivalent precision.

6.2 Test on processing and assembling test

6.2.5 The assembly test of waste fitting shall be conducted by hand-feeling.

6.3 Test on appearance

6.3.1 Inspect the appearance of product visually.

6.3.2 Visual inspection shall be carried out on the polished surface of product under natural scattered light or white light without reflected light. The illuminance is not lower than 300 lx.

6.3.3 Visual inspection shall be carried out on the plated-surface of product under natural scattered light or white light without reflected. The illuminance is not lower than

300 lx.

6.3.4 Acetic acid-salt spray test shall be conducted on plated-surface of waste fitting for

24h according to GB/T 10125-1997.The results are rated according to GB/T 6461-2002.

6.4 Test on requirements for wall thickness of waste fitting pipe

The test on thickness shall be conducted with Vernier caliper with precision of 0.02 mm.

6.5 Test on trap seal

Test on trap seal shall be conducted with water sealing ruler or straight-ruler.

6.6 Test on stability of water sealing

6.7.1.3 Install the tested waste fitting on the test device in Figure 2; shut down the drainage device; apply static water pressure of 150mm water column on the overflow port and maintain it for 5 min.

6.7.1.4 Install the tested waste fitting on the test device in Figure 2; turn on the drainage device, block the drainage port at the end; apply static water pressure of 500 mm water column at the water inlet of drainage device and maintain it for 5 min.

6.7.2 Test on flow performance

Install tested sample on test device in Annex B.1; turn on the drainage device; the continuous water level of drainage fitting, that is used with matching parts such as wash basin, bidet, and washing-tank, is maintained at vertical height of 120+2 -2 mm compared to water inlet; the continuous water level of drainage fitting that is used with matching part bath-tub is maintained at vertical height of 150-2 -2 mm compared to the water inlet; after the water level is stabilized, record the flow rate.

7.1 Inspection classification

Product inspection is classified into exit-factory inspection and type inspection based on type.

7.2 Exit-factory inspection

7.2.1 It is carried out by manufacturer's quality inspection department; qualification certificate shall be signed before leaving the factory.

7.2.2 The items of exit-factory inspection include 5.1, 5.2, 5.3.1, 5.3.2, 5.3.3, 5.3.4, 5.4,

5.5 and 5.7.1.

7.2.4 For exit-factory inspection, take the products of same-category, same-variety and

same-model as a batch; the samples for exit-factory inspection are taken from the same batch. Sampling is carried out in accordance with the requirements of GB/T 2828.1-2003, with the general inspection level I, a normal inspection for single sampling plan. After the inspected items are inspected, if all the items are acceptable, then this batch of products shall be determined as acceptable; if one or more items are rejected, then this batch shall be determined as rejected.

7.3 Type inspection

7.3.1 Inspection items

Type inspection items include all those (except 5.1) required in Clause 5.

7.3.4 Sampling and determination

The samples of the type inspection are drawn from the submitted qualified batch. The unqualified quality level (RQL) is 50.The single sampling method of the determination level I in GB/T 2829-2002 is adopted. The sampling and determination are carried out according to those specified in Table 4.After the inspected items are inspected, if all the items are acceptable, then this batch of products shall be determined as acceptable; if one or more items are rejected, then this batch shall be determined as rejected.

8.1 Marking

A permanent trademark shall be arranged on the obvious location of product.

8.2 Packaging

Product packaging shall indicate the product name, product model, trademark, manufacturer's name and address, and the standard number used.

8.3 Transportation

Products shall be free from impact, squeeze, rain, moisture and chemical corrosion during transportation.

8.4 Storage

The product shall be stored in a well-ventilated, dry room, and shall not be stored together with corrosive substances such as acid or alkali.

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