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    • Corporate brochure

      Including the company's overall image, history, strength introduction, production technology, quality control, technical center and other brief introductions.

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    • English brochure

      The company's overall image, history, strength introduction, production technology, quality control, technical center and other English introduction.

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    • Chang's installation selection manual (2017-5 version)

      The manual includes the parameters of various specifications of pipes and fittings; the outline of the design and installation of the building drainage system; the pipe installation methods and the cooperation of civil engineering; the admission and engineering acceptance methods of pipes

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    • Chang's new product manual for drainage and cast iron

      Including the introduction of Chang's patented product series, general new product series, new product series for drainage on the same floor, and convenient installation of new product series.

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    • Chang's anti-backflow H pipe fittings coloring page

      Chang's anti-backflow H pipe fitting patent number 201620488787.5, this patented product completely solves the sewage in the drainage pipe into the ventilation pipe, and reduces the pressure fluctuations in the double riser drainage system.

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    • Chang's roof rainwater drainage system publicity color page

      The coloring page introduces the definition, composition, and characteristics of the rainwater drainage system on the roof of Chang's, respectively. At the same time, it introduces the composition and use of the rainwater bucket series products corresponding to the system, which is convenient for users to choose.

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    • Patent-Anti-clamping leaflet leaflet

      Chang's anti-detachment clamp is mainly used for reinforcement of A-type B-type bottom elbow and cross-pipe connection, which can increase the anti-pulling ability of the interface to 1.2Mpa.

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    • Patent-Compensating Apron Leaflet

      The patent number is 201510638505.5. The Wong's compensation rubber ring can effectively avoid the pipe damage caused by the axial expansion of the pipe due to thermal expansion, and it is easy to install and select high quality materials.

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