LONTRIN specializes in production of seamless steel pipe products with size range OD19-1067MM*WT2-140mm. Our company has a production capacity of 700 kt for seamless steel pipe per year . The standard of production includes ASTM?ASME?API5L?API5CT?EN?BS?DIN?GB etc. LONTRIN has awarded ISO9001?ISO14001?API5L?API5CT?DNV?LR?BV?CCS?PED?AD2000?CPD ?MLSE certificate etc .