... Special pipe: API Pipe Black steell casingSeamless Steel Pipe with Beveled End, Plastic Cap and Black ... diameter:139.7-273.1mm (5-10 inch) Steel Pipe Thickness: SCH 20 to SCH 140 Standard: ... API 5L: API 5CT, ASTM A106, Steel Grade: A, B, X42, X46, X52, X56, X60 ... 16Mn, ST37, ST52 Packing: Labeled and bundled together with steel strip Application: Low, medium and high pressure boiler, ...