Dalian Yiduo Piping Co., Ltd. is located in Changxing Island Economic District Dalian city, it covers
an area of 200000 square meters, it is a high-tech enterprises, it integrates R &D , design and
manufacturing of expansion joint , compensator, heat insulating pipe products and provides related
technical services.
YIDUO is devoted to manufacturing the high-end compensator with the service life that is not less
than the pipelines’. Each expansion joint is custom-engineered to provide high quality and long life
for service in multiple field. Producing the insulating pipe with energy saving, safe reliable and
intelligent property. The main products of the company include: bellows expansion joints for
pressure vessel, metal bellows expansion joint, sleeve compensator, ball joint compensator, rotating
compensator, Non-metallic compensator, polyurethane insulating pipe, steam insulating pipe etc. The
company has professional NDT room, physical and chemical experiment center, we can test the physical
and chemical properties and quality indexes of materials and products to ensure the product quality.
The company has enterprise technology center, sets up R & D team that's composed of national researchers and other experts, breakthrough progress has been made for product research and development in high temperature and high pressure pipe, insulating materials, compensator and other products, more than 60 items of invention and utility model patents have been obtained to fill the domestic vacancy. The company can produce expansion joint, compensator, insulating pipe and other products in accordance with the European, American and other international standards. The company obtained the "products adopt international standard certificate" issued by technical supervision departments in 2005. The company with strong technical ability has participated in the GB/T 29047-2012 " Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and high density polyethylene casing pipes," CJJ/T104-2012 "Technical specification for directly buried steam heating pipeline in city ," GB/T 29046-2012 "The methods for technical specification for pre-insulated directly buried district heating pipes," CJ/T 140-2001 "Heat loss test for thermal insulation structure and evaluation methods for thermal insulation efficiency of district heating pipe, " "Technical specification for leakage monitoring system of directly buried hot-water pipeline for district heating," " Prefabricated directly buried insulating steel plastic composite pipe with polyurethane foamed-plastics and high density polyethylene casing pipes," " Prefabricated directly buried insulating pipes and fittings with polyurethane foamed-plastics and glass reinforced plastic outer protective layer for district heating," Technical specification for prefabricated directly buried insulating valve for district heating," CJ/T487-2015 "Welded sleeve compensator for district heating pipeline ," "ball joint compensator," "rotating compensator" and a number of national and industry standards of the compilation and revision work.
The company passed the GB / T19001-2008 "quality management system," GB/T24001-2004 "environmental management system," GB / T 28001-2011 "occupational health and safety management system certification," "pressure piping components manufacturing class A and class B license," "Pressure piping design GB2, GC2, GC3 qualification," "ASME U stamp certificate," "PED CE product certification "etc.. The company has won the "Liaoning Province famous trademark," "brand-name products in Liaoning Province," " AAA grade credit rating," "keeping contacts regard credits enterprise of Liaoning Province," "safety and culture construction demonstration enterprises of Liaoning Province ," "high-tech enterprises in Dalian," "advanced enterprise of secure production in Dalian," " Dalian labor relationship model of harmonious enterprise," "staff welfare facilities construction outstanding unit of Dalian "and other honorary title.
Products of Dalian Yiduo Piping Co., Ltd. have the advantages of energy saving and environmental protection , safety and reliability in quality and technology ,it is in the leading position in domestic field. Our products are mainly used in petrochemical industry, electric power construction, district heating, metallurgical mines and other industries ,it is an important supplier of expansion joint ,compensator and pipe for CNPC, Sinopec, China Huaneng Group, China Datang Corporation, China GuoDian Corporation, China Huadian Corporation, China Power Investment Corporation and other petrochemical and thermal power enterprises. The company has participated in a number of key projects of the world bank, Asian Development Bank and the government, over the years, the enterprise has won the unanimous praise of the user by strong advantages in technology, reliable product quality and perfect service system.
