... Carbon Steel Pipes2)Size: 1/2"-48"3)Standard: ASTM,DIN,JIS GBCARBON STEEL SEAMLESS PIPES:1) Pipe Diameter ... ,DIN2448,DIN17120,API 5L, API 5CT, ASTM A106, ASTM A53,ASTM A179,ASTM A210,ASTM A36,JISG3454,JISG3455,JISG3556,GOST8732,GOST8731MaterialGr. B ... sea.Applications rangePetroleum, chemical, power; (oil, gas, water) liquid transport; shipbuilding, construction, steel structure; city piping system etc ...