Small diameter precision steel pipe? ? Small diameter alloy steel pipe? Seamless steel pipe is a precision cold-drawn seamless pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. Choosing mechanical structure or hydraulic equipment made in precision seamless tube can greatly save processing time, improve material utilization and improve product quality.

1. If you want to obtain seamless precision tubes with smaller size and better quality, you must adopt cold rolling, cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-high mill, and the steel pipe is rolled in an annular pass consisting of a variable cross-section annular groove and a fixed conical plug. Cold drawing is usually carried out on a 0.5 ~ 100 t single-chain or double-chain cold drawing machine. Cold-drawn seamless steel tubes of high-quality carbon structural steel mainly adopt 10 #, 20 #, 35 # and 45 # steels. Besides ensuring chemical composition and mechanical properties, water pressure test, crimping, flaring and flattening test are also needed. Weight calculation formula of cold-drawn seamless steel pipe: (outside diameter-wall thickness) * wall thickness *0.02466=kg/ m (weight per meter) 2. Calculation formula of steel pipe weight [(outside diameter-wall thickness) * wall thickness ]*0.02466=kg/ m (weight per meter).