ask: In valve specifications, what is the difference between P and R in the code indicating the valve material?
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As in the title, Q41F-16P and Q41F-16R are both ball valves, flange connection, PN16, stainless steel, but one is P and the other is R. From the query, it is found that P is chromium nickel titanium steel and R is chromium nickel molybdenum titanium steel. What is the difference between P and R? Can they be considered to be indistinguishable and used interchangeably in general work?
This post was last edited by Valve Mingming on 2016-10-26 13:33. One is a 304 stainless steel ball valve and the other is a 316 stainless steel ball valve. Whether they can be mixed depends on conditions such as medium and temperature, otherwise problems will occur.
It depends on the corrosion of the two materials by the medium under operating conditions. The corrosion resistance of the two materials is different.
Are you sure, friend? 304 0Cr18Ni9 mainly contains about 18% chromium, about 9% nickel, and the rest is iron. 316 0Cr17Ni12Mo2 mainly contains about 17 chromium, about 12 nickel, about 2 molybdenum, and the rest is iron. 316L 00Cr17Ni14Mo2 is mainly composed of about 17 chromium, about 14 nickel, about 2 molybdenum, and the rest is iron. This is the composition of 304 and 316 that I checked. It seems that it does not contain titanium. In addition, the valve material has an L, which means chromium alloy.
Of course it’s confirmed, I am the valve manufacturer
Well, it seems you are the authority, learn* Here we are~~ So P is 304 and R is 316, right?
P=304 R=316 L=316L
P-304 stainless steel, R-316 stainless steel
P-valve body is 304 R-valve body is 316 PL-valve body is 304L RL-valve body is 316L This is how we write the model