It's suitable to have shell test and seal test for flanged end butterfly valves and wafer type butterfly valves.
适用于法兰连接和对夹式蝶阀的强度和密封性能试验。
Two types of end are standard on steel pipes and fittings, that is flanged and screwed.
钢管和管件有两种标准端部型式，即：法兰和丝扣。 。
Two types of end are standard on steel pipes and fittings, that is flanged and screwed.
钢管和管件有两种标准端部型式，即：法兰和丝扣。
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