... pipe tube China from professional 409 410 420 446 ferritic pipe tube, ferritic stainless steel pipe, ferritic stainless steel tube, 446 stainless steel pipe, 410 stainless steel pipe ... 300 series.This Feature determines the 400 series pipe need special technology in the production.Usually the ... production period of 400 seroes pipe need 30-35 days.Standard: AISI, ASTM, DIN ...