Flange type and the meaning of 16Cr5Mo
Thread Content
This post was last edited by flute6 on 2010-1-18 at 16:02. I have just started working at the company in the workshop and am learning *; I hope senior colleagues can offer some help. 1. What are the different types of flange welding? How can you tell from the drawing? 2. What are the flange connection types? 3. What does 16Cr5Mo represent? Thank you first
Types of flange connections: Plate flat welding flanges, Necked flat welding flanges, Necked butt welding flanges, Socket welding flanges, Threaded flanges, Flange covers, Necked butt welding ring loose-flange types, Flat welding ring loose-flange types, Ring groove face flanges and flange covers, Large-diameter plate flanges, Large-diameter high-neck flanges, Auger blind plates, Butt welding ring loose-flange types, Rotating flanges, Anchored flanges, Clad/welded flanges
Regarding the steel grade 16Cr5Mo: In the designation of alloy structural steels, the first two digits represent ten thousand times the average mass fraction of carbon in the steel, while the digits following an element indicate hundred times its average mass fraction.
Reply to tangfang*n: When the average alloy content is <1.5%, only the element symbols are usually indicated in the steel grade, without specifying the concentration. However, in cases where confusion might arise, the number “1” can also be added after the element symbol. For example, for the steel grades “12CrMoV” and “12Cr1MoV”, the chromium content is 0.4–0.6% in the former and 0.9–1.2% in the latter; all other components are identical. When the average content of alloying elements is ≥1.5%, ≥2.5%, ≥3.5%..., the content should be indicated after the element symbol, which can be represented as 2, 3, 4..., etc. accordingly. For example, 18Cr2Ni4WA.