5 years test result of SS vs other pipes

Stainless steel and other pipes used in city water supply were subjected to five year underground installation tests in 25 cities of Japan. These 5 year test results in Japan have proved that

• stainless steel piping (SS 304 or 316) have not undergone any corrosion
• the carbon steel (avg - 0.019 mm/yr) and lead pipes (0.002mm/yr) have very high corrosion rates with a maximum corrosion rate of 5-6 times these average rates.
• The cast Copper pipes and fittings have undergone frequent corrosion.

Generally speaking, SS 304 pipes didn't develop any degradation at site except slight discoloration and exhibited excellent corrosion resistance. SS 316 pipes were free from even the discoloration.

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Stainless Steel vs Copper Tubing benefits

An interesting study on the benefits of Copper vs Stainless steel tubing is available in the site

http://www.alstromcorp.com/tr02.htm

“According to NORA study, one of the keys to maximize fuel performance is characterizing oil sludge and determining its possible contribution… Deposits found in copper tubing consisted of oxidized fuel. The clogging of copper fuel lines was one of the problems discovered, as the study found solid black particles that adhered to tube surface. Cooper has also been known to accelerate fuel-degradation process, forming particulates. On the other hand, far fewer solid and gum were produced by fuel when exposed to steel and stainless steel. The reports recommend using steel piping materials wherever it is feasible.”

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