TRIM: 13% CHR.What material does SS represent?
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Ask professional friends for help and guidance: TRIM: 13% CHR.What material does SS represent? TRIM stands for valve core. I searched for a long time but couldn't find it out!
SS : Stainless SteelStainless SteelCHR: Chrome 13% CHR.SS is 0Cr13
TRIM: 13% CHR.SS Trim: 13% chromium stainless steel. TRIM refers to valve internal parts, such as valve core, valve seat and other parts that are in contact with the medium.
The inner parts of the pipe are 13Cr. The so-called trim mainly refers to the parts in direct contact with the medium.
Basically agree with the opinion of the brother on the second floor, but chromium is generally written as Cr, and TRIM can be understood as the valve core, which generally includes the valve stem, valve plate (valve disc) sealing surface, valve seat sealing surface, etc. 13% Cr generally refers to stainless steel with a Cr content of 13%. When used on valves, it is generally martensitic and has a high carbon content, usually 2Cr13. As a surfacing weld on the valve stem and sealing surface, 0Cr13 has insufficient strength and hardness.
trim means the valve plate and valve seat should be seat
The valve plate is DISC, and D&S DISC AND SEAT/valve plate (disc) and valve seat are commonly used in valve descriptions. And trim represents the matching assembly inside the valve. Compared with the external valve body, valve cover, gland, etc. of the valve, it is understood that the valve core is the closest. Under normal circumstances, the valve stem, valve plate, and valve seat are the most closely related and have the highest material requirements. TRIM: 13% CR.SS. If there are no further additional D&S requirements, for small valves, it means that the valve stem, valve plate, and valve seat are made of stainless steel containing 13% CR. ； For large or extra-large valves, it means that the valve stem is 13% CR stainless steel, and the valve seat and valve plate can be made of 13% CR stainless steel or the same material as the valve body and then piled with 13% CR stainless steel. Pipe material engineers can add a surfacing layer with better sealing surface based on wear resistance and corrosion requirements, such as Stellite alloy, tungsten carbide, etc.
I just encountered this problem, is it usually 2Cr13?
The concept of trim is noted in foreign standards. Generally, gate valves refer to the sealing surface, valve stem, packing gland and upper sealing seat. Ball valves include the ball. Generally speaking, in stop valves and gate valves, TRIM does not include the gate plate and disc.