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Sunday, December 20, 2009

REPAIR PROCEDURE FOR TANK

 *note: this is the sample document for the related job only
*author:

TABLE OF CONTENTS
1. INTRODUCTION
2. PURPOSE
3. SPECIFICATION
4. APPLICABLE CODE / STANDADR
5. METHOD AND INSPECTION
6. SAFETY
7. REFERENCES & OTHER SUPPORTIVES DOCUMENT - LIST OF WPS & PQR - LIST OF WQT ( WELDER LIST )

REPAIR PROCEDURE  
 1. INTRODUCTION
This repair procedure is required for grind off and / or perform weld repair on minor defect such as Cluster Porosity, Slug, Under Cut, Arc Strike, Spartter and etc. which have been found during visual inspection and / or found by NDE.  

2. PURPOSE
The purpose of this work is as follow: To grind off all the defect, at the defect area base on the report and / or marking area and carry out visual inspection and follow by NDE, examination such as MPI / DPT To perform welding at the defect area after grinding ( surface preparation ) and carry out NDE such as MPI, DPT or RT  
3. SPECIFICATION
As per Owner / Client requiment or NDE report.

4. APPLICABLE CODE / STANDARD
The welding and NTD works are to be carried out and in accordance with the following:
i) ASME VIII DIV 1 - UW 42 “Surface Weld Metal Build Up” - Appendix 6 “Method For Magnetic particle Testing” - Appendix 8 “Method For Liquid penetrating Testing”
ii) ASME IX - Welding And Brazing Qualification iii) ASME V - Nondestructive Examination  

5. METHOD & INSPECTION
5.1) Mark the defect area to grind off accordingly by appointed inspector and base on NDE (RT, MPI or DPT) report.
5.2) Grind off the defect until meet the sound metal and perform NDE to confirm the has been removed from the respective shell area for welding surface preparation.
5.3) Perform surface preparation before performing weld build up.
5.4) Ensure that area is free from Oil, Grease, Water or any other foreign material
5.5) Proceed weld build up by qualified welder, WPS No as per requiment refer to Welding Qualification. 5.6) Perform NDT upon completion of weld build up on the defect / marking area.
5.7) If the result of NDE is unacceptable remove the defect by grinding and repeat NDE to ensure it is completely removed.
5.8) If the result of NDE is acceptable, carry out the Visual Inspection and request for RT to confirm the weldment are free from and indication / defect.  

6. SAFETY
6.1) All condition stated on job safety analysis (JSA) must complied with permit to work (PTW).
6.2) All personal working at job site shall be informed to the safety awareness by attending the safety induction or safety tools box meeting conducted by safety prior to commencing of work.
6.3) Full PPE is ensured whilst working at site.
6.4) Refer to safety requirement.  

7. REFERENCES & OTHER SUPPORTIVE DOCUMENT
7.1) WPS & PQR – To be Advice
7.2) WQT List or Welder list – To be Advice

2 comments:

  1. Kindly add the plate reinforcements required on lower gauge material before welding to avoid any distortions

    ReplyDelete