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Valve And Gas Fitting Sale on good price ,professional in valve & brass/copper connectors and fittings making ,export to worldwide markets. Welcome OEM business / customized order by offering samples and drawings. Adhesive layers are used to bond the inner layer and out layer to the wall of aluminum pipe.Application: Heat and cold pipes for production and life; heating system of caliduct, underfloorand wall; pipelines of coal gas and natural gas; and pipelines for solar heatingand cooling systems Features: Excellent thermal propertiesLong service life