Black Painted Seamless Steel Pipes is made of Q235 hot rolled or cold rolled strip steel or coil as the base material.The utility model relates to a hollow square lightweight thin-walled steel pipe made by cold bending process. Black hollow square steel pipe parameterThe thickness is generally about

Black Hollow Section is made of Q235 hot rolled or cold rolled strip steel or coil as the base material.The utility model relates to a hollow square lightweight thin-walled steel pipe made by cold bending process. Black steel pipe parameterThe thickness is generally about 1.0mm-30mmLength: 1-24 mete

Black Hollow Section is made of Q235 hot rolled or cold rolled strip steel or coil as the base material.The utility model relates to a hollow square lightweight thin-walled steel pipe made by cold bending process. Black steel pipe parameterThe thickness is generally about 1.0mm-30mmLength: 1-24 mete