Regarding the material of pure water pipelines
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What material do people think is best for pure water pipes? A workshop has 4 floors, and pure water needs to be supplied to the equipment on each floor. I want to use metal pipes; PP-R pipes have a short span and seem difficult to lay. Any good suggestions?
It is better to use cast iron or ductile iron. .
It is recommended to use steel-reinforced plastic composite pipes, which are resistant to pressure and corrosion, have large spacing between supports, are made of polyethylene, do not contaminate water quality, and are also reasonably priced.
When water is delivered to the equipment using iron pipes, its purity is reduced. I don’t seem to have seen small-diameter pipes made of steel and plastic composites; PP/PPR pipes are relatively soft. As alternatives, one can use sanitary-grade stainless steel pipes, drinking-water grade PVC pipes, or steel pipes with plastic-coated interiors
What was said upstairs is right – it’s best to use stainless steel pipes that are food-grade or sanitary-grade
Reply to 4# Kind Walid: You are absolutely right. The smallest diameter for steel-reinforced plastic composite pipes is DN50; there is no smaller size available, and such pipes may not be suitable in some applications. PPR should work for small diameters; although it is softer, it should have little impact.
Our company uses sanitary-grade 304 stainless steel.
Pipes with a steel lining and PP coating can be used
Reply to 2# yehongide: Don’t mislead newcomers. . . . This material is not very suitable for being used with drinking tap water
Use sanitary-grade stainless steel pipes; 316L is preferred. 304 is also acceptable, depending on the process requirements.
Yes, it mainly depends on the process requirements. In pharmaceutical manufacturing facilities or other environments requiring a high level of cleanliness, 316L is the best choice