... cold pilgered, manual polished, mechanical polished4) Sizes: Φ6 - Φ830mm x Φ0. 5 - Φ45mmA) OD: Φ6 - Φ830mmB) WT: 0. 5 - 45mmC) ... grade, TP317L, TP321, TP347, 2205 (S31803), 1805, 2507,6) Internal technical standards implemented: GB/T 14975-2002, GB/T ... , food, chemical, paper, fertilizer, Fabric, aviation and nuclear)B) Fluid, gas and oil transportC) Pressure and heat transmissionD) Construction ...