... infiltrationh,shot blasting,washing and presssure testing equipments. Description of bushing :1) Size: DN15-DN630(pipe)/DN300-DN1620(plate)2) Material ... , SCH20, SCH30, SCH40, SCH80, XS, STD, XXS6) Application: Petroleum, Chemical, Power, Gas, oil field, offshore, water system, Metallurgy, Ship- building, etc ...