Questions from beginners； What do wcb and lcb mean?
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Dear experts, I came across the terms WCB and LCB on valves again. I’d like to know what these materials mean. Also, what kind of material should be used in equipment that handles powders to ensure durability? Thank you all!
WCB and LCB are types of materials
WCB carbon steel LCB low-temperature carbon steel
WCB and LCB are the materials for the valve housing. WCB is equivalent to 25 or 35 carbon steel, while LCB is low-temperature carbon steel.
WCB is equivalent to 25 or 35 carbon steel. LCB is a low-temperature carbon steel suitable for temperatures down to -40 degrees Celsius; it is based on American standards
w: weldability, i.e., the ease of welding; c: cast, referring to casting and cast products. A, B, C indicate the strength levels of steel grades, from lowest to highest
WCB cannot be treated as 20# or 35#; especially in the case of valve body leaks, it is probably ZG250-450 – I forgot exactly. For patch welding, J422 or J427 are often used, but this does not comply with AWS standards; J507 should be used instead.
7# lauhob: carbon steel and cast steel, equivalent to 25# and 35# cast steel
So, what do LCB stand for respectively? Thank you! Also, may I ask which standard this comes from? Thank you!
WCB and LCB refer to the material of the valve body: WCB is carbon steel, while LCB is low-temperature carbon steel