Carbon Steel Butt Welded Pipe Fittings: A)CS,SS,AS B)Size: 1/2inch to 48inch C)Standard:SCH20,STD,SCH40,SCH80 Hebei Kairui Pipe Fittings ... specialize in manufacturing all kinds of carbon steel pipe fittings with high quality and best price.ProductCarbon steel elbow,tee,reducer,bend,cap,pipeMaterialCarbon ... can set up agreeable and mutual benefit business with you . carbon steel pipe fittings