CB* 3208-1983
Requirements for commissioning and acceptance of special equipment for cutter suction dredgers (English Version)

Standard No.

CB* 3208-1983

Language

Chinese, Available in English version

Release Date

1984

Published By

Professional Standard-Ships

Scope

This standard applies to special dredging equipment for large, medium and small electric, electro-hydraulic or diesel engine driven cutter suction dredgers. 1.1 Carry out commissioning according to the commissioning program provided by the design unit and approved by the ship inspection. The shipyard shall obtain the consent of the design unit and the shipowner and the approval of the ship inspection before modifying the commissioning program. 1.2 The commissioning of marine centrifugal mud pump equipment includes the following contents: a. Operation inspection of driving machinery - under the rated speed conditions of the dock test pipeline and mud pump, the rated power or supporting power of the driving machinery can be achieved through throttling measures. b. The mud pump device pumps clean water for operation parameter calibration or pump characteristic curve mapping - the mud pump device uses throttling measures to achieve the design working conditions of the mud pump clear water under the conditions of the dock or construction site pipelines, and uses the clear water test parameter error to determine the mud pump design, Manufacturing, installation and commissioning quality. c. Assessment of the dredging operation of the mud pump device - the mud pump device operates with the test load under construction site pipeline conditions and performs dredging. It is required that the driving machinery should not be overloaded, the mud pump should not exceed the speed, and all equipment should operate normally. 1.3 During the dock commissioning and clear water test, the dredger should be reliably moored at the dock. Vessels are not allowed to dock or pass within 30m behind the boat. 1.4 Shipped pumps should be based on the pump characteristic curves of model pumps, master pumps, and physical pumps that have been tested or operated on actual ships. 1.5 The characteristic curve of the onboard pump that meets the requirements of Article 1.4 can be obtained through conversion. During the test, only the calibration at the rated operating condition point or the test operating condition point can be carried out. Its parameter error should be within the tolerance range specified in this standard. 1.6 In principle, the shipped pumps produced in batches should have the bench test pump characteristic curve of the actual pump. If only the characteristic curve of the model pump is available, the first batch of shipped pumps should be tested and calibrated on a real ship. If the parameters at the test and calibration points are out of tolerance, the characteristic curve of the real ship pump should be measured and mapped. 1.7 Shipped pumps that do not meet the requirements of 1.4 should be measured and mapped with pump characteristic curves after shipment. Its requirements should comply with the relevant provisions of this standard. 1.8 After the on-board pump is tested, it should have a converted or actual ship-measured pump characteristic curve. 1.9 According to the needs of the dredger operation, the test run time can be calculated continuously or cumulatively, but the dredger pump unit cannot be stopped. If the shutdown time exceeds half an hour or the cumulative time exceeds 1 hour due to technical failure, the test should be re-run after the fault is eliminated. . Non-technical failures can be handled through negotiation as appropriate.