The type of steep pipe we can supply: a.seamless steel pipe :material 20#,45#,16Mn,specification,dia57-630mm b.high-frequency weld tube :material Q235A/B,specification,dia15-159mm c.galvanized pipe: material Q235A/B ,specification, dia 15-80mm d.stainless steel pipe: material 304,316,321,430,specification ,dia 15-159mm e.cast iron pipe:material is spherulitic graphite cast iron, 18#, 22# pig iron Please do not feel any hesitate to contact us for any doubt. Wish we will have a pleasant and successful cooperation.