Second, commissioning requirements
1, reciprocating pump, gear pump, screw pump positive displacement pump, etc. before you start, you must first open the import and export valves.
2, centrifugal pump at startup, the valve should open the entrance to the closure of export valves, electrical power will not start too high; stable outlet pressure to be immediately after the valve slowly to open exports to regulate the flow and head required. Export valve closed, the pump should not be too long time continuous operation, otherwise the liquid will pump impeller agitation and temperature.
3, with chemical medium commissioning, the pump fluid-filled, replacement, exhaust, etc. should be provided for the implementation of technical documents.
4, where a medium to allow water to carry out commissioning of pumps, water testing should be the safest transportation of petroleum products for the pump, the pump cavity and connected with the bearings lubricated media work, media work should be carried out commissioning .
5, pump must be at rated load for a single test run for 4h; reciprocating pump without load (export valve full) commissioning, should not be less than 15min; normal working pressure in the 1 / 4, 1 / 2 , 3 / 4 sub-operation under the conditions of the test; running time of the paragraph shall be not less than 0.5 h; the last work under pressure in continuous operation for more than 4h; the previous stress level is not qualified prior to commissioning, the latter should not be Test pressure class.
6, metering pump flow should be measured; the flow of the metering pump can be adjusted, the adjusting mechanism must be flexible movements, accurate; Adjustable metering pump flow should flow in the instructions for the rated flow of 1 / 4, 1 / 2, 3 / 4 and rated under the determination of the actual traffic flow.
7, high-temperature pump in the warm-up should be carried out before commissioning, pump body surface and the working medium of the temperature difference between the import process pipelines shall not be greater than 40 ℃; pump body warm-up, the temperature should be uniform increase in temperature rise per hour may not be large at 50 ℃; preheating process, every car a half circle plate 10min; when temperature exceeds 150 ℃, 5min every car a half circle plate; check pump body base side sliding bolt axial expansion gap Department; open the entrance of the valve and emptying valves, exhaust pump gas, preheated to the required temperature and then close the valve emptying; commissioning parking should be 20 ~ 30 min every car a half circle plate until the pump body until the temperature dropped to 50 ℃.
8, low-temperature pump in the low-temperature conditions, commissioning, pre-cooling before the bypass pipe to open, according to technical requirements of the pipeline and pump cavity for desiccant processing; and then, all open to short pump body valve cooling, cooling rate per hour shall not exceed 30 ℃; achieved after pre-cooling temperature, and then emptying the valve shut down for pump commissioning.
9, steam pump cylinder in the test run before the application of steam to warm cylinder and condensed water to make a timely schedule; downtime should put a net condensation of water inside the cylinder, and provides good insulation antifreeze.
10, of brittle materials (ferrosilicon, ceramics, etc.) to create the pump, should be in operation to prevent the sudden cold or heat at first, allowed more than 50 ℃ temperature difference between hot and cold mutation.
1, reciprocating pump, gear pump, screw pump positive displacement pump, etc. before you start, you must first open the import and export valves.
2, centrifugal pump at startup, the valve should open the entrance to the closure of export valves, electrical power will not start too high; stable outlet pressure to be immediately after the valve slowly to open exports to regulate the flow and head required. Export valve closed, the pump should not be too long time continuous operation, otherwise the liquid will pump impeller agitation and temperature.
3, with chemical medium commissioning, the pump fluid-filled, replacement, exhaust, etc. should be provided for the implementation of technical documents.
4, where a medium to allow water to carry out commissioning of pumps, water testing should be the safest transportation of petroleum products for the pump, the pump cavity and connected with the bearings lubricated media work, media work should be carried out commissioning .
5, pump must be at rated load for a single test run for 4h; reciprocating pump without load (export valve full) commissioning, should not be less than 15min; normal working pressure in the 1 / 4, 1 / 2 , 3 / 4 sub-operation under the conditions of the test; running time of the paragraph shall be not less than 0.5 h; the last work under pressure in continuous operation for more than 4h; the previous stress level is not qualified prior to commissioning, the latter should not be Test pressure class.
6, metering pump flow should be measured; the flow of the metering pump can be adjusted, the adjusting mechanism must be flexible movements, accurate; Adjustable metering pump flow should flow in the instructions for the rated flow of 1 / 4, 1 / 2, 3 / 4 and rated under the determination of the actual traffic flow.
7, high-temperature pump in the warm-up should be carried out before commissioning, pump body surface and the working medium of the temperature difference between the import process pipelines shall not be greater than 40 ℃; pump body warm-up, the temperature should be uniform increase in temperature rise per hour may not be large at 50 ℃; preheating process, every car a half circle plate 10min; when temperature exceeds 150 ℃, 5min every car a half circle plate; check pump body base side sliding bolt axial expansion gap Department; open the entrance of the valve and emptying valves, exhaust pump gas, preheated to the required temperature and then close the valve emptying; commissioning parking should be 20 ~ 30 min every car a half circle plate until the pump body until the temperature dropped to 50 ℃.
8, low-temperature pump in the low-temperature conditions, commissioning, pre-cooling before the bypass pipe to open, according to technical requirements of the pipeline and pump cavity for desiccant processing; and then, all open to short pump body valve cooling, cooling rate per hour shall not exceed 30 ℃; achieved after pre-cooling temperature, and then emptying the valve shut down for pump commissioning.
9, steam pump cylinder in the test run before the application of steam to warm cylinder and condensed water to make a timely schedule; downtime should put a net condensation of water inside the cylinder, and provides good insulation antifreeze.
10, of brittle materials (ferrosilicon, ceramics, etc.) to create the pump, should be in operation to prevent the sudden cold or heat at first, allowed more than 50 ℃ temperature difference between hot and cold mutation.
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