Tianjin Haimen Building Materials Co Ltd ，founded in 1987 , formerly a military enterprise , restructuring and renaming as Tianjin Haimen Building Materials Co.,Ltd in 2010 .

The company mainly engaged into the production , sales and services for the Mineral wool products (including rock wool , ceramic wool and glass wool products ) and Prefabricated Heat Insulation Pipe products (Including high-density and low-pressure polyethylene outer sheath pipe , polyurethane direct burial insulation pipe, steam direct burial insulation pipe and direct burial insulation pipe fittings etc).

Tianjin Haimen have passed the certificate of  ISO9001/14001/18001 Series Management System Certificate , CCS-Plant Certificate, and have the Grade II Qualification Certificate of the National Antiseptic Insulation Project Construction . Mineral wool products also have passed the Bureau Veritas(BV) , American Bureau of Shipping(ABS) , Nippon Kaiji Kyokai(NK) , Lloyd's Register(LR) , Germanischer Lloyd(GL) and Det Norske Veritas(DNV) , Russian Maritime Register of Shipping(RMRS) approval .

With the philosophy of “not selling future with short-term interests , with quality goods to participate the market competition”, provide quality products and excellent services , sincerely expect friends from worldwide to consult and negotiate businesses , seeking common development .