Tianjin D.H Interlock and Stretchlock Metal Hose Technology Co., Ltd. is a private company located in Hongqiao Technology and Trade development Zone in Tianjin P.R China.
The company gives priority to producing stainless steel stripwound interlock and stretchlock metal hose within production and business sphere. The hoses are generally used for conveying saw dust, grain, plastic pellets, tar and asphalt, and exhaust fumes.

The interlocked metal hose can also be used as a protective armor guard on other types of hose assemblies such as IC card public telephone handset armored cord.

The Interlocked and stretchlocked metallic hose is manufactured by spirally winding a preformed continuous metal strip, so that the edges interlock to form a hose. The stripwound interlock hose is available with a directional flow liner.
Alloys include galvanized and ANSI stainless steel.

Standard sizes range from 4 mm through 150 mm I.D. A variety of size, length and end fitting configurations are available.

Our interlock metal hoses have obtained International Standard Authentication introduced by State Bureau of Technical Supervision.(Product standard code equal to: JIS c8309-1994)

Standard product material: adopting strip steel measuring up Japanese Industry Standard JIS G4305 (SUS304)

Product execution standard code: Q/12HQ3333-1999

Our interlock electric protective wrapped metal hoses were used in several key projects like Tianjin People's Hospital and the construction of light rail, more notably, the outdoor IC card public telephone handset armored cord occupies a market share of 80%, ranking the first among domestic suppliers of public telephone components, making the company to come first on the list of suppliers of Ministry of Posts and Telecommunications People'c Republic of China.