... STANDARD ANSI, ASME, DIN, JIS, BS, GB 4 MATERIAL CARBON STEEL STAILESS STEELALLOY STEEL (SEAM & SEAMLESS,ZINC) 5 CERTIFICATE ISO9001:2000 , API , BV ... , LOYD Application:Petroleum, chemical, power, gas, metallurgy, shipbuilding, construction, water and nuclear power etc. high pressure pipe