国家/地区 中国（3）
IPC部 B（3） F（3） C（2）
IPC大类 B29（3） F16（3） C08（2）
IPC小类 B29D（3）
IPC F16L009/147（3）
发明人
公开年 2021（3）
申请年 2021（2） 
专利权人

Strong corrosion resistance steel belt reinforced spiral corrugated pipe comprises steel belt and outer pipe and inner pipe composing bisphenol A epoxy vinyl resin, phenolic resin, polypropylene, glass fiber, and modified graphene.

PEI S, ZHOU S, XU J, XU H, CHEN X

Oxidation-resistant polyethylene composite pipe comprises core pipe that is provided with aluminum sheet layer provided with outer layer pipe, where core pipe and outer layer pipe are made of polyethylene, chlorinated polyethylene, dibutyltin dilaurate, zinc stearate, graphene, and barium laurate.

LIU J, WANG J, WANG H, WU D

Multilayer structure e.g. pipe for underwater device, comprises composite reinforcing layer comprising thermoplastic polymer having preset glass transition temperature, welded to outermost sealing layer, and excludes hydrogen from structure.

HOCHSTETTER G