国家/地区 中国（4）
IPC部 B（4）
IPC大类 F16（4） B05（2） B29（2）
C08（2）
IPC小类 F16L（4）
IPC B05D007/22（2） B05D007/24（2） B29D023/00（2）
C08L027/06（2） F16L009/14（2）
发明人
公开年 2023（4）
申请年 2022（4）
专利权人

Double-wall corrugated pipe material outer wall and inner wall, where outer wall comprises e.g. chlorinated polyvinyl chloride resin, grafted polyethylene solubilizer, light shielding agent, ultraviolet light absorber, strengthening agent graphene, lubricant, and nano calcium carbonate.

LUO Q, YE C, ZHENG S, CHEN G, ZHANG S

Expansion joint of catalytic cracking, has corrugated pipe and flange that are made of titanium material and inner wall of corrugate pipe is provided with anti-corrosion layer.

GU L, MIAO X, QIAN Y, XIA G

Mortar lining material useful for ductile cast iron pipe lining for sewage, comprises high aluminum cement, granulated blast furnace slag micro powder, silicon ash, sand, water reducing agent, retarder, graphene oxide, and water.

WANG Y, MA Z, ZHAO H, WANG J

Preparing internal spiral polyvinyl chloride drainage pipe, comprises e.g. bending and spiraling steel wire, extruding, injecting into brushing mechanism, carrying out spiral groove processing, forming inner spiral groove, spraying, extruding, painting and performing preliminary drying.

LIU Z