welded stainless steel pipe manufacture standard: JIS, GB,DIN,ASTM,EN,AISI material:304 Steel PipesManufacture Standard:JIS, GB, DIN, ASTM, EN, AISIwelded tubes,Thickness ... : Every tube is sleeved in plastic bag individually, and then several tubes are packed by weaving bag, which is seaworthy 304 steel pipe