... casingSeamless Steel Pipe with Beveled End, Plastic Cap and Black Paint Steel Pipe Outside diameter:139.7-273 ... 16Mn, ST37, ST52 Packing: Labeled and bundled together with steel strip Application: Low, medium and high pressure boiler, transportation for ... gas, water, oil and natural gas, tubes for heat exchanger and chemical fertilizer equipments, for hydraulic pillar service etc ...