Application:
1.    District thermal heating system construction,
2.    Pre-insulated pipes field joint welding and oil pipes joint welding;
3.    Preinsulated bonded pipe system for directly buried hot water networks;
4.    Three PE/PP layers with foam jacket insulation pipes connection;
5.    Steel pipes anti-corrosion etc.

Qingdao Huashida Machinery Co., LTD, is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation&anticorrosion machines, and pipe jointing&anticorrosion materials, with 21 years of production experience. 
Our main products are:
1. HDPE jacket pipe for pre-insulated pipe Production Line 
2. Rigid pre-insulated pipe Production Line
3. Flexible pre-insulated pipe(PERT) production line
4. Steel pipe FBE/2LPE/3LPE anti-corrosion coating line
5. Steel pipe derusting line
6. PE pressure pipe/Water Gas supply pipe production line
6. PP/PE plastic board/sheet/geomembrane production line
7. NBR PVC Thermal insulation tube/plate production line  
8.Pipeline anti-corrosion materials and instruments: heat shrink joint coating sleeve, electro-fusion weldable joint sleeve, portable welding gun(extruder), PE PP welding rod. 
We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Iran, Turkey, Russia, Nigeria and other countries.