May I ask: Is J41H-16C H the material of the valve seat, and is C the material of the valve body?
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May I ask: Is J41H-16C H the material of the valve seat, and is C the material of the valve body? Why aren’t the materials of the valve core and valve stem indicated? In the JBT_308-_2004 valve model designation method, is the sealing surface or lining material the same as the material of the valve seat? ? ? Why doesn’t this standard take into account the material of the valve core and valve stem? ? ?
Remember that H represents the material of the valve body, while C refers to the material of the valve core and seat
This is the model designation for national standard valves; look at the American standard specifications for more detailed rules
Refer to JB/T-308, the method for compiling valve models. The valve model is J41H-16C: H denotes the material of the valve seat, usually referring to 13Cr welding material; C denotes the material of the valve body. If the pressure is below 16, the letter C is indicated, while if it is above 16, no such indication is given； Why aren’t the materials of the valve core and valve stem indicated? JB/T308 is the standard for specifying model numbers. The valve stem and valve core materials are considered part of the internal components, and the selection of these components should take into account various factors such as the medium flowing through the pipeline, its corrosiveness, erosion potential, and wear resistance ； So generally, for our internal components, the valve stems are made of 20Cr13, while the valve discs are made of A105+13Cr! ! The valve seat of the stop valve is welded onto the body itself! ! Hope it’s adopted!
Sir, in the coding method for JBT_308-_2004_ valve models, is the sealing surface or lining material the same as the material of the valve seat? ? ?
H refers to the alloy steel sealing surface, while C refers to the carbon steel valve body
In 308, the sealing surface material refers to the material used for welding on the valve seat, not the material of the valve seat itself! However, for gate valves designed in accordance with the American standard API600, we generally use a WCB valve body, with the seat made of A105+13CR ； It’s actually the same in the standards as well ； However, some staff in design institutes may misunderstand the situation, resulting in valve seats being made of 13CR material while 410 is used (and CA15 for the gate). Such cases do occur! ! Generally, it is not recommended to do this when considering design costs and materials! It’s still something like A105+13CR!
Yes, the valve seat is welded from 13Cr; the valve body is made of WCB cast steel