... 5-30mm Standard: ASTM,JIS,GB,DIN,EN Yuanlitai Steel PIpe stainless steel welded pipe Material:304,316,316l,321.ect Delivery time: ... #GB3087-199910-426×2-40Low and medium pressure boiler superheater tube, boiling water pipe, pipe size locomotivealloy steeltubeCr5Mo(P5,STFA25 ... 1) Above all, in your inquiry, besides the outer-diameter and thickness, please indicate clearly: the material of your required ...