Shenzhen Changyuan Changtong Heat-shrinkable Material Co., Ltd (SCCHM) is a subordinate high-tech enterprise of Shenzhen Changyuan New Material Co., Ltd. (SCNM), which is the biggest base producing heat-shrinkable material in Chinaï¼?Stock Code:600525ï¼?, SCCHM specialized in R&D, manufacturing, and sale of new material, such as Heat-shrinkable Material for Anti-corrosion of Pipelines, Heat-shrinkable Wraparound Sleeve for Connecting of Telecommunication Cables, and Connection Accessories for Fiber Cables. We hold a group of specialists and experts, who engaged the earliest in R&D of heat-shrinkable products and. We strongly specialized in development of technics and innovation of system for enterprise management has been established in SCCHM. SCCHM has been assessed and registered as meeting the requirements of ISO 9001 and ISO14001. The products made by SCCHM have passed the tests operated by the Comprehensive Laboratory of Scientific & Technical Pipeline Company of China and Anti-corrosion and Thermal Insulation Product Quality Supervision Testing Center of China National Petroleum ***** properties of products are satisfied the standard of the Oil & Natural Gas Industry and International Standard, such as DIN30672 ã??EN12068 or NACE.