onnection dimensions Permissible additional radial B4-CH-8-D Bevel-helical gear reducer B4

Flender/Flender Gear Units/Bevel-helical gear reducer B4

test. 5.3.3 Test Pressure Gauge All gauge used for field testing shall have suitable range so that the test pressure of the various system falls in 3% to 6% of gauge scale range. Pressure gage shall be minimum of 1 mm. Size of Bourdon shall not be less than 7% of nominal diameter of dial range. auge shall be of good quality and in first cl ass working condition. Prior to the start of any test or periodically during the field test programmes, all test gauges shall be calibrated using standard dead weight gauge tester or other suitable approved testing apparatus. Any gauge having an incorrect zero reading or error of more than 2% of full scale range shall be discarded. The Eng ineer-in-charge shall check the accuracy of master pressure gauge used for calibration. 5.4 Testing Pressure 5.4.1 Hydrostatic Test All vents and other connections used as vents shall be kept open while filling the line with test fluid for complete removal of air. For pressurising and depressurising the system, temporary isolating valves shall be provided if valves, vents, drains do not exist in the system. Pressure shall be applied only after the system/line is ready and approved by the Engineer-in-charge. Pressure shall be applied by means of suitable test pump or other pressure source which shall be isolated from the system as the desired test pressure is reached and stabilised in the system. 1 of 1 STANDARD TECHNICAL SPECIFICATION MECON LIMITED REGD. OFF: RANCHI 8 OIL & GAS SBU, DELHI DOCUMENT NO. Page 7 of 8 TITLE MEC//0/2/1 REVISION : 0 FLUSHING AND TESTING OF PIPING SYSTEMS EDITION : 1 pressure gauge shall be provided at the pump discharge for guiding the system to the required pressure. The pump shall be attended constantly during the test by an authorised person. The pump shall be isolated from the system wherever the pump is to be left unattended. Test pressure shall be maintained for sufficient length of time to permit throug