Stainless steel patterned pipes refer to both seamless patterned pipes and welded patterned pipes.

Generally used for handrails and decorative purposes, the material is usually 304 stainless steel or above. It is first embossed into a tube with a steel strip and then welded into a complete shape, with a polished finish.

Stainless steel welded patterned pipes, typically with diamond, square, or circular patterns, are made by rolling steel strips into a pattern and then焊接 into shape. Seamless stainless steel patterned pipes, usually for decorative purposes, involve pressing the seamless pipes to form a circular pattern and then polishing the surface.

Stainless steel patterned tubes are typically available in sizes ranging from 22mm to 48mm, used for home decoration, stair railings, tube handles, and car handles, etc.

Modified hard polyvinyl chloride drainage pipes have plug ends for the pipe material and socket ends for the fittings. Most of them are connected using socket-and-plug bonding method, which is an irreversible connection. Due to the high linear expansion coefficient of plastic products, the pipeline experiences changes in length due to variations in environmental and sewage temperatures.

UPVC issues

(1) The arrangement of the drain outlet pipes significantly affects the system's design flow rate. The connection between the vertical pipe and the outlet pipe requires an eccentric elbow, with the outlet pipe having a larger diameter than the vertical pipe by one size. The outlet pipe should be as unobstructed as possible to discharge wastewater outdoors, without any bends or tees in between. Many projects have confirmed that narrower drain outlet pipes and additional fittings on the outlet pipes can cause unfavorable changes in the pressure distribution within the pipe, reducing the allowable flow rate and making it prone to clogged toilet drain issues during future use.

(2) The UPVC spiral pipe drainage system ensures that the water flows in a spiral manner down the pipes to minimize drainage noise. Therefore, the vertical pipes cannot be connected to other vertical pipes, necessitating the use of an independent single vertical pipe drainage system. This is one of the features of using UPVC spiral pipes. Avoid the unnecessary addition of cast iron pipe drainage systems, especially in high-rise buildings where adding exhaust pipes not only wastes materials but also ruins the drainage characteristics of the spiral pipes.