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Thread: Welding Procedures
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20-11-2010, 09:33 PM #1
Welding Procedures
I am looking for information about welding procedures for ammonia refrigeration piping. Recommended piping found in ASHRAE Regrigeration Handbook for this application is carbon steel either ASTM A53 Grade A or B or ASTM A106. I want to verify if nitrogen purge is required or not for welding.
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21-11-2010, 12:35 AM #2
Re: Welding Procedures
nitrogen purging not good, crystalizes weld.
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