No. | Guarantee items | Figures & definition | Test & acceptance method |
1 | Cleanliness of plate surface | ASa 2.5 or BSa 2.5
Meaning when the line speed is 4.5 m/min, the cleanliness of surface of the plate to be tested shall be ensured.
ASa 2.0 or BSa 2.0
Meaning when the line speed is 6 m/min, the
cleanliness of surface of the plate to be tested shall be ensured.
Note:
surface conditions of steel plates before shot
blasting have to be A or B, according to standard ISO 8501-1;1988 | (1) 5 pieces of plates with thickness 6-12 mm, width 2,800 – 3,250 mm;
(2) 5 pieces of plates with thickness 12-25 mm, width 2.000 – 2,800 mm;
(3) 5 pieces of plates with thickness 25-50(80) mm, width 1,500 – 2,000
mm; |
2 | Equipment surrounding noise | 85 dBA or the lower, but without impact sound of the steel plates Referring to the noise value that occurs adjacent to the surface treatment machine. | (1) At least 10 checking points should be chosen adjacent to the equipment and the specific locations will be designated by the Buyer on site;
(2) During the test, the plates to be machined for test shall include the sheets thickness of 6 - 50 mm and width 1,500 – 3,250 mm (at least 3 pieces);
(3) The test method and condition is referred to the National Standards and regulations of the Buyer. |
3 | Fume discharging concentration | 1 mg/m3 or the lower concentration
It refers to the concentration that can be reached place where the fume-discharging outlet of the cartridge filter is
located. Regarding the area around the surface treatment machine it is not allowed that visible dust comes out of the machine
| 4-hour continuous measurement shall be carried out after the surface treatment machine is started for the first time, the same procedure shall also be performed one time at 3 different shifts.
Visible check for the area around the
machine
|
4 | The residual ball left on the surface of plate after shot blasting | ≤10grains /m2
Referring to quantity of blasting ball within 1m2 existing on the top surface of the plate after shot blasting
| (1) Any surface shot material left on the surface of the plate after cleaning should be less than the guarantee figures
(2) The test time is 1 month.
(3) The operation record is taken as basis. |
5 | Failure rate of the line | Failure rate value: 1 %
(The failure rate definition of line=T3/(T- T1 - T2)×100%:
T: Overall calendar time (h);
T1: No material outage time (h);
T2: Scheduled outage time (h);
T3: failure outage time (h);
T stop=T1+T2+T3;).
| (1) The test of the line failure rate is referring to the outage statistical statement of the plant:
(2) Statistics is to be taken in 3 times, 1 is the statistics for weekly report. The actual week number of the test is to be determined by the Buyer. |
6 | Life of roller brush (If any) | _3000_hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not calculated.
(3) Based on the actual relevant reports of the plant. |
7 | Life of feeder cage | _1800 _hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not calculated.
(3) Based on the actual relevant reports of the plant. |
8 | Life of blades of impeller head | _1000 _hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not included.
(3) Based on the actual relevant reports of the plant. |
9 | Life of adjusting bush of impeller head | _1800_hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not included.
(3) Based on the actual relevant reports of the plant. |
10 | Life of filter element | _3000_hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not included.
(3) Based on the actual relevant reports of the plant. |
11 | Life of bucket elevator belt | 5000 hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not included.
(3) Based on the actual relevant reports of the plant. |
12 | Life of roller with wear resistant ring shape bushes | 5000 hr | (1) Calculation of accumulation life by the actual blasting time on the steel plate by the blasting unit.
(2) Idle racing time of the blasting unit is not included.
(3) Based on the actual relevant reports of the plant. |