Hydrostatic Test Procedure - Piping [PDF]

Citation preview

Document No.:



14-0960-MS-HST-QC-020A



Revision No.:



0



Date: 23/04/2014



HYDROSTATIC TESTING PROCEDURE



0



1st Issued for Review & Approval



23-04-2014



Rev



Description



Date



Prepared By



Reviewed By



Approved By



Contents



1.0



Purpose



2.0



Scope



3.0



References



4.0



Responsibilities



5.0



Procedure



6.0



Test Record



7.0



Repair & Test



Hydrostatic Testing Procedure (Pressure Test) 1.0



Purpose This procedure defines the minimum requirements and guidelines for the hydrostatic testing of the piping system to ensure the integrity of weld and strength of piping or tubing components.



2.0



Scope Applicable to Piping system that requires hydrostatic testing at shop or after installation.



3.0



References Spec: 3.1



4.0



Responsibilities 4.1 4.2



4.3 4.4



5.0



Section –ASME / ANSI B31.3 & Client Spec



The Pressure Test shall be under the supervision of the Production Supervisor. The Quality Control Department shall be responsible for coordinating the Pressure Test and inform the Client’s Authorized Inspector to witness the test. The Q.C. Department is required to check the approval of all NDE Tests of the system (where applicable) that will be tested and all heat treatment (where applicable) was completed. The Production Department and the Shop Supervisor shall be responsible for preparing the Hydrostatic Test and providing technical assistance. It is the responsibility of Q.C. Department and his Q.C. Inspector to ensure that all testing fully complies with the requirements of Code and this procedure.



Procedures 5.1.1



5.1.2 5.1.3



The hydrostatic test setup shall be provided with pump which is capable of pressurizing the piping under test to full test pressure specified and can be readily isolated from the component without disconnecting and essential test line. The pressure shall be gradually increased with the rate not higher than 0.5 bar/min until the test pressure is obtained. A minimum of two pressure gauges shall be used. One pressure gauge shall be located at near the pressure test pump discharge and another pressure gauge shall be mounted at the highest point of the piping system under test.



5.1.4 5.1.5 5.1.6 5.1.7 5.1.8 5.1.9 6.0



All valves, fittings, Nozzle and pipes shall have a pressure rating of equivalent or more than the Max Allowable Test Pressure. All valves shall be in “OPEN” position during the test. Testing medium shall be potable water that is above 6 deg C and have a chloride content of less than 50 PPM. The pressure gauges & Temperature Recorder used in testing shall be calibrated and validity of calibration shall be for 1 year or at anytime there is a reason to believe they are in error. Test pressure of at least 150% of design pressure to be held for at least 01 hr. No welding shall be done after the hydrostatic test successfully completed. After completion of test, drying and cleaning of the piping system with clean dry compressed air shall be carried out.



Test Record 6.1



Test records shall be prepared of piping system by Q.C. Department. These records shall be included:6.1.1 Date, time and duration of test 6.1.2 Identification of The piping system and equipment included in the test 6.1.3 Test medium 6.1.4 Test pressure 6.1.5 Test temperature 6.1.6 Pressure holding time 6.1.7 Pressure and Temperature Recording chart (Hydrograph). 6.1.8 Pressure gauge cert numbers



6.2



7.0



All parties concerned shall sign off the test records for acceptance after successfully pressure tested of piping system and return to Q.C. Department for retention.



Repair & Test 7.1 During Inspection ,If Leaks , cracks or any other defects are observed , the defects shall be rectified as per approved welding procedure by qualified welder. Attachment: 1 Sample Hydro Test Report.