API SPEC 5L PIPE LINE STEEL PLATE

GB/T 9711 and ISO 3183 uses same steel grades with API Spec 5L,just put the x to l,the yield strength into the international system of units,expressed in MPa and to rounded to the number at the end of 0 and 5. Manufacture of petroleum, natural gas gathering , transmission pipeline and coal, building material slurry pipeline in the plate and strip referred to as steel. In the pipeline, in addition to the requirements has a high compressive strength, but also requires a high