... do all kinds of tests by ourselves including LOAD-BEARING TESTING(conform to EN124), SALT SPRAY TEST,CHEMICAL ANALYSIS TEST, ... good porcelain enamel resistance.For example:Thermal shock test, Fire testing,Impact test and salt spraying Cast iron grate, cast ... 96hours) Specifications:Dear of all our valuable customers, our grate products are specified in a large numbers of different sizes, demensions ...