... 1.for expanding the pipe for bulge system 2.scope:DN15-DN200 3.Bulge systeM:thread connection Bulging ToolsIt is used for ... to expand the pipe for DN15-DN200.ZK-AB manual expanding tool for DN15-DN50ZK-C electronic expanding tool for DN65-DN200Bulging thin-walled ... developed by ourselves. Its traits are high tensile strength, easy for installation, economic, durable, safe, refit celerity and also ...