Process of casing pipe in plant

Process of casing pipe in plant:

Steel ingot heating → hydraulic punching → reheating → extension → periodic rolling → reheating → sizing → cooling → straightening → pipe cutting → inspection

Steel ingot heating: ∮216mm periodic tube rolling mill with a ring furnace, ∮ 318mm periodic tube rolling mill original design with two ring furnace.
Hydraulic punching: ∮ 216mm is 10kN hydraulic press punching, ∮ 318mm punching with 18kN hydraulic press.
Extension: Oil casing plants are using two roller guide extension machine.
Reheating: with a tray furnace, rolling mill cycle were used, and then do not use the heat into the furnace.
Sizing: use the two-roll 5-rack sizing machine.

Oil casing plant cooling bed is a one-way chain-type cooling bed, ∮ 216mm cycle rolling unit product specifications ∮ 114.3 ~ 319mm, wall thickness 6 ~ 40mm; ∮ 318mm cycle rolling unit rolling product specifications ∮ 168 ~ 377mm, wall thickness 6 ~ 40mm. As oil well pipe, you can produce a variety of casing pipe and some drill pipe.

In order to improve the quality of the casing pipe body, the casing pipe factory built a set of ∮180mm precision pipe rolling unit jointly designed by China and the United States in 1994 by means of introducing technology, joint design and joint manufacturing equipment. Using continuous casting round tube, ring heating furnace heating, perforation of the cone roller piercing, precision rolling mill rolling, 12-rack three-roll micro-tension sizing sizing, cooling bed cooling. Formed a world's only 1 sets of seamless steel pipe short-flow production lines, and its production process: EAF → furnace refining → vacuum degassing → continuous casting → heat transfer → tube heating → perforation → rolling pipe → sizing → cooling tempering (reserved) → online quenching (reserved) → tempering (reserved) → sizing (reserved) → cooling → straightening → flaw detecting → sawing → cutting head → inspection → rail straight pipe machining.