焊接控制程序Welding Control

All welding shall be in accordance with the requirements of the ASME Code Section Ⅸand Section Ⅷ, Division 1.

1 WELDING PROCEDURE SPECIFICATION (WPS)

1.1 Welding Engineer shall prepare WPS for all welding of pressure retaining parts and of attachments to them. WPS shall be reviewed by the Welding QC Engineer, and be approved by the Technical Dept. Supervisor.

1.2 The essential, nonessential and supplemental essential variables of WPS shall meet the requirements of the ASME Code Section Ⅸand supplemental requirements of Section Ⅷ, Division 1 and the Customer’s Specification, as applicable.

1.3 The WPS shall be approved only after the supporting PQR is qualified and certified as described below.

1.4 The WPS shall be with Document No. and Revision No. When an essential or supplemental essential variable is changed, the WPS shall be re-qualified with new or additional PQR and then be revised.

2 PROCEDURE QUALIFICATION RECORD （PQR）

2.1 The Welding Engineer shall provide the raw material and welding materials, instruct the Welder/ Welding Operator to use the preliminary WPS to make coupon prepared for PQR.

2.2 The Welding Engineer shall present the test coupon required by the ASME Code Section IX to a qualified Lab outside SURF for testing. If the welded test coupons need heat treatment, the Welding Engineer shall assure that the welded test coupon has been properly heat treated as required by the WPS.

2.3 The Welding Engineer shall supervise and record the data during welding of test coupon in the PQR form.

2.4 The Welding Engineer shall be responsible to obtain certified test report from the Lab. After review and satisfy to himself the certified test report, the Welding Engineer shall transfer these test data from the test reports to the PQR. If impact test is required, it shall be performed as per the requirements of SA-370, or ISO 148 part 1 of applicable edition. Impact test machine shall be calibrated as per the requirements of ASTM E23, or ISO 148 Part 2 and Part 3 of applicable edition. Temperature measuring instruments used for impact test shall be calibrated every six (6) months and records shall be provided.

2.5 The Welding QC Engineer shall review the PQR to verify the conformance to the ASME Code Section IX and other applicable Sections, and then present it to the QC Dept. Supervisor for his review and certification.

2.6 The QA Engineer and AI may at any time require any procedure to be re-qualified for cause, or witness the tests of the welding procedure.

3 WELDER/WELDING OPERATOR QUALIFICATION

3.1 The Welding Engineer shall provide raw material and welding materials prepared for performance qualification, and supervise the Welder/ Welding Operator to weld test coupons using qualified WPS.

3.2 The Welding Engineer shall supervise and record the data during welding of test coupon in Welder/ Welding Operator Performance Qualification Record. The test coupon shall be visually examined by the Welding Engineer. If found satisfactory, the Welding Engineer will Subcontract test coupon to an outside qualified Lab for testing, or to NDE level III to conduct test or RT.

3.3 The Welding Engineer shall transfer the test data from the test reports to the WPQ/WOPQ, or indicate the RT Report No. on the WPQ/WOPQ. The WPQ/WOPQ shall also include the qualified range of essential variables. The Welding QC Engineer shall review the WPQ/WOPQ to verify the conformance to the qualified WPS and ASME Code Section Ⅸ then present it to the Technical Dept. Supervisor for his approval and certification.

3.4 The QA Engineer and the AI may at any time request any Welder/ Welding Operator to be re-qualified for cause.

4 IDENTIFICATION AND REGISTRATION OF WELDER/WELDING OPERATOR 4.1 The Welding Engineer shall assign a unique identification number for each qualified and certified welders/welding operators on the WPQ/WOPQ. When a welder leaves the company, his number is not allocated.

4.2 The Welding Engineer shall prepare the List of Qualified Welder/ Welding Operator (Form No. 7-1) in accordance with WPQ/WOPQ. The List of Qualified Welder/ Welding Operator shall be approved by the Welding QC Engineer.

4.3 The List of Qualified Welder/ Welding Operator shall be up-dated whenever there is a change in the qualification of the List of Qualified Welder/Welding Operator or additional and removal of Welder/ Welding Operator.

5 RENEWAL OF WELDER/WELDING OPERATOR QUALIFICATION

5.1 The Welding Engineer shall check the Welding Records of each qualified Welder/ Welding Operator every three months to verify continuous performance of welding in qualified process.

5.2 The result of check shall be recorded on the Welder/ Welding Operator Renewal Check Sheet (Form No. 7-2) by the Welding Engineer.

5.3 Renewal of Welder/ Welding Operator qualification shall be evaluated under the following conditions:

a)When a Welder/ Welding Operator has not welded with a process during a period of 6