ISO 9001: 2015 chitupa chemhando yekutonga system Chirevo chekuyedza pamusoro pemabhendi chimiro uye isiri-simbi inosanganisirwa yetsono valve forging isina chinhu ISO 14001: 2015 yezvakatipoteredza manejimendi systemcertification chitupa ISO 45001: 2018 occupational health safety management systemcertification chitupa Pressure Equipment Directive mavharuvhu chitupa Pressure Equipment Directive 4.3 zvinhu chitupa EAC-Fittings chitupa EAC-Valves chitupa ABS uye ASTM F1387 chigadzirwa chekuongorora chitupa chekuongorora ABS uye ASTM F1387 prototype yekuyedza mushumo Chengetedzo yekugadzira standardization chitupa Special equipment production rezinesi - pressure piping components ISO15500 Tube Fittings yekuongorora chitupa ISO15500 bhora vharafu yekuongorora chitupa HIC bvunzo mushumo weinotonhora inokweva Stainless simbi bar HIC test report yetsono valve forging isina chinhu Chirevo chekuyedza yeasina bhendi esimbi inclusions mustainless simbi inotonhora stock