... gas transport ,structure ,boiler,hear ecchanger,super heater10.certification:ISO9000/9001/9004/19011:200011. Supply Ability:3500-4000 metric tons per ... ±0.02Length5.8-12m,or as per your requestInternational StandardISO 9001-2008StandardASTM/JIS/GB/BS/DINMaterialA213,A335,A135,DIN17175,JIS G3454 ...