... 2.Material: SS304/SS316L 3.Certificate:ISO9001:2000 (sanitary manhole cover, manway cover) Export to North America and Europ ... tanks or vessels can be locked up.YAC:arc manhole cover,which can sustain a Max.Static pressure of ... sustain a Max.Working pressure of 5barProduct304/316L Sanitary Manhole CoverTypeElliptic,Circular,Square typeSize330-600MMMaterialSS304/SS316LPressurewith pressure and without ...