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  1. engessam2001

    Cracks during welding of St.St 347 piping after eight years in-service

    hi every one, During welding St.St 347 thk45 mm Dia./16inch of transfer line between ammonia converter and waste heat boiler we observed cracks in root toes. we use ER347Si for root passes and E347-15 for filling passes- and N2 as purging gas . the specification of line are -ammonia synthise gas...

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