E0900428-v1 _ SPEC FOR WELDING REPAIR.pdf - LASER INTERFEROMETER GRAVITATIONAL WAVE OBSERVATORY E0900428-V1 Drawing No SPECIFICATION Sheet 1 Vers of 3

E0900428-v1 _ SPEC FOR WELDING REPAIR.pdf - LASER...

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LASER INTERFEROMETER GRAVITATIONAL WAVE OBSERVATORY SPECIFICATION E0900428 -V1 Drawing No Vers. Sheet 1 of 3 SPECIFICATION FOR WELDING REPAIRS LIGO Form F0900006-v1 APPROVALS DATE REV DCN NO. BY CHECK DCC DATE AUTHOR: CHECKED: APPROVED: DCC RELEASE TABLE OF CONTENTS 1.0 SCOPE 2.0 GENERAL PROCEDURE 3.0 BASE MATERIAL REPAIR PROCEDURE ---------------------------------------------------------------------------------------------------------------------------------------------- 1.0 SCOPE 1.1 This procedure covers the requirements for repairing all nonconformities in base metal surfaces, the repair of nonconformities in edge preparation and the repair of unacceptable defects in inspected weld joints. The Seller shall incorporate these requirements is their procedures. 1.2 Cleaning of repaired areas shall be performed in accordance with Specification E0900411-v1. 2.0 GENERAL PROCEDURE 2.1 REPAIRS TO BASE METAL SURFACE NONCONFORMITIES 2.1.1 For Repairs Not Requiring Welding A. Surface defects shall be removed by grinding with CARBIDE BURR CUTTERS only. Abrasive-type wheels and stones are not allowed on vacuum base metal surfaces. B. Ground surface repairs shall be visually inspected to verify that the nonconformity has been removed or the indication reduced to an acceptable limit.
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