Hilong has achieved over 10 items of technical breakthrough in developing pipe ends technology of lined pipe.. The lined pipe production has adopted hydrostatic expending process which is mature and advanced in technique, as well as with following features: all pipe holding tooling, air-tight and non-contacting assembly process for humid control and dust prevention. Hilong has set up a welding lab jointly with Polysoude France, and adopts the hot wire Tig welding. Up to present, Hilong company has completed numerous important projects of lined pipes both in China and overseas countries.
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