国家/地区 中国（3）
IPC部 B（3）
IPC大类 B29（3）
IPC小类 F16L（3） B29D（2）
IPC F16L057/02（3）
发明人
公开年 2022（3）
申请年 2022（2） 
专利权人

Electric melting pipe fitting for high voltage composite pipeline, comprises outer protective layer from inside to outside, where material of hydrogen blocking layer is polyamide resin composition, where polyamide resin composition contains polyamide resin, and particulate inorganic compound.

MA Z, WANG Y, ZHAO M, YU J, LI Y, TANG Z

Modified polyethylene wearable composite pipe for water supply and drainage of municipal and building, has glass fiber line that is provided with multiple layers on outer layer pipe structure, inner tube body and outer layer pipe body fixedly connected with the inner layer pipe body.

LIN J

Polybutylene composite pipe used in hot spring transportation, comprises anti-corrosion outer layer, thermal insulation layer and working inner layer from outside to inside, where working inner layer is made of polybutene material and insulation layer is made of polyethylene foamed plastic.

QIN X, YI Z, WANG L, JIN J, LIANG Y