... :GB/T9112 4.Qualification:API,CE,ISO Detailed description of carbon steel tee Tee TypeEqual tee, reducing tee,lateral tee, BW ... ,SCH120,SCH40,SCH160,XXSManufacturing processPush, Press, Forge, Cast, etc.Material Carbon steelStainless steelAlloy steelDuplex steelNickel alloy steelCarbon steel tee, stainless steel ...