Spherical Tank Group,certificate:CE,ISO9001:2008 Spherical Tank GroupSpecification:Material of Spherical shell plates16MnR, 16MnDR, 15MnNbR, 15MnNiNbDR, WH510, WH530, CREVSELSO34SS, SPV36N, SPV355N ... -JITE610U2, 20R, JIS GFEHITEN-610U2L, etc.Wall thickness of Spherical shell plates From 12mm to 62mm 12mm—62mmMaximum pressure 3.3MPaMinimum ...