Tangshan High voltage porcelain insulator Co., Ltd. is built in 1952, the main products is stain-resistance outdoor post porcelain insulator for 12-1100kv AC system and ±800KV DC system. The products are key supporting for high voltage transmission and substation domestic and overseas and applied to electrical equipment of AC & DC transmission and substation system and as insulation and supporting of electrical conduction in power distribution unit. The products are applied to matching high voltage isolator and earthing switch, also can be used for busbar supporting and wave trapper supporting of power system.

The stain-resistance outdoor post porcelain insulator of 126—252KV、363—550KV、800KV、1100KV and ±800KV DC system developed and manufactured by Tangshan high voltage porcelain insulator Co., Ltd. had been pass the products identification which organized by China Electricity Council and the products had reached the domestic and international advanced level.