forged petrochemical machinery parts. size as customer requirment. standard:ASME, AISI,ASTM,DIN, BS, EN, JIS etc. 1-forged parts used for petrochemical machinery.2-Certificated by 9 classification societies such as DNV, BV, ABS,GL,RINA,LR, KR, NK,CCS,and ISO9001:2008. 3-Standard:ASME, AISI,ASTM,DIN, BS, EN, JIS etc 4-size as customer requirments.