What is the difference between sanitary 304 and ordinary 304 pipe?

Sanitary and ordinary industrial pipe look at the surface to know

Sanitary surface inside and outside the polished, mirror-like. Thickness is generally between 1.2 and 2.0, the price is sold by the meter.

Industrial surface on the silver-white, the thickness of 2.0 or more. The price is sold by kilogram.

Pharmaceutical equipment on the important parts of the best with 316L, 316L good corrosion resistance, long service life, with 304 accidents can not afford to lose. The life of a person is at stake.