Nanjing Duble Metal Equipment Engineering Co., Ltd located in No.8 Debang Road, JIangning Development Zone.It's is the national high-tech enterprise with more than one hundred patents, the total land area is about 180, 000m2.Duble has two subsidiary Nanjing Sanbom Clad Material Limited Company, Huangshan Sanbom Clad Material Limited company and one business unit for distillation and separation.There are five factories in Duble including nonferrous metals equipment and heat exchanger factory, heavy pressure vessel factory, pressure pipe fittings and special metal structure factory, clad material factory, tower internal factory.Duble hold Chinese high, medium and low pressure vessel design and manufacturing license(A1, A2), ASME U stamp certificate, AB level pressure pipe manufacturing license, metal bellows expansion joints A-class manufacturing license, and ISO 9001, 14001 and 18001 certificates certified by BV, has class A/B products safety registration of clad plate for pressure vessels.Duble products are widey used in fine chemical industry, coal chemical indstry, petrochemical industry, solar energy, nuclear, environmental protection, sea water desalination, and offshre engineeer etc.