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Shenyang Wensheng Instrument manufactures full-series The cleaning pig for domestic and cross-border oil, gas, chemical, subsea and water pipelines, complying with Chinese DN and international inch standards. Its pigs adopt two core parts: five elastic polyurethane sealing materials for diverse temperatures and media, plus four metal skeleton types matching various corrosive environments. Covering DN50–DN1400, standard sizes are in stock while large calibers support customized production with short lead times. All products come with bilingual inspection certificates, suited for global projects across Southeast Asia, Russia, the Middle East, Europe and America with full export service.